KR100704828B1 - Method for providing multimedia contents using the display of caller information - Google Patents

Abstract

The present invention relates to a method for providing a call service through a session call based on a session initiation protocol (SIP), and to provide multimedia content to a called party's terminal by calling information display method before a day call is established between terminals. It provides a method of providing multimedia contents by way of data, and can provide not only text but also multimedia contents such as audio, image, and video to the called party before a call is made between users in a call service through a data call. In order to satisfy the desire and the data call between the calling party and the called party is established, not only the regular media intended by the calling party can be sent to the called party but also the data call between the calling party and the called party is established. Outgoing before or even if not established In effect, so that could previously send early media (early media) which had been pre-registered in the incoming side.

Session Initiation Protocol (SIP), call service, caller ID, multimedia content, early session

Description

Method for providing multimedia contents using the display of caller information}

1 is a configuration diagram of an embodiment of a communication network to which the present invention is applied.

2A and 2B are flowcharts illustrating an embodiment of a method for providing multimedia content in a call information display method in the case of specifying early session support according to the present invention.

3A and 3B are flowcharts illustrating an embodiment of a method for providing multimedia content using an origination information display method when not supporting early session support according to the present invention.

* Explanation of symbols on the main parts of the drawing

10: Multimedia call information providing server 11: Subscriber DB

12: media server 13: content DB

14: mobile communication terminal 15: IP telephone

16: computer 17: laptop

18: PDA 19: landline phone

The present invention relates to a method for providing a call service through a day call based on a session initiation protocol (SIP), and more particularly, to provide multimedia content to a called party's terminal by calling information display method before a day call is established between terminals. The present invention relates to a multimedia content providing method of a call information display method.

In recent years, thanks to the development of wired and wireless communication technology, users subscribe to the display of caller information service (aka lettering service or caller nickname display service). It is now possible to display the name, nickname, specific phrases of others on the mobile communication terminal (or landline).

On the other hand, in the voice call service in the conventional mobile communication network (PLMN) and the public telephone network (PSTN), the wired / wireless Internet network (IP network or packet data network), which has recently been in the spotlight, is compared to simply transmitting and receiving only information by voice between users. In the data call call service (e.g., conference, telephone, voice mail, event notification, instant messaging, etc.), various data can be transmitted while transmitting and receiving various information by voice and video between users.

The data call communication service in the wired / wireless internet network is based on the Session Initiation Protocol (SIP). The session initiation protocol is an application layer signaling protocol that specifies a procedure for creating, modifying and terminating sessions between participants.

As mentioned above, there is a service that provides the caller with information specified by the caller before a call is made between users through voice calls. However, in the caller ID service, limited text content (eg, a combination of letters, numbers, and special characters) is used. Of emoticons, etc.), so that the user does not satisfy the desire to enjoy multimedia.

Therefore, in accordance with the recent trend of the generalization of call services through data calls, there is an urgent need for a multimedia call information providing service that can provide multimedia contents such as text, audio, images, and video to a called party before a call is made between users.

On the other hand, in a call service based on the session initiation protocol, a multimedia file can be transmitted and received between users only after a data call is established, and the other party can only watch the multimedia content (also known as regular media) when the other party sends the multimedia content. I can afford it.

Therefore, even if the data call is not established in the session initiation protocol based call service, that is, the call is received from the calling party when the called party does not answer the call (no answer state), or the called party checks the absence status or the called party is busy. The caller's mobile device and later receive the multimedia content registered by the calling party (aka early media) or useful multimedia information provided by the service even before the called party answers the call after the called party rings. There is an urgent need for technology that enables the appreciation / acquisition from the side.

The present invention has been proposed to solve the above problems and to meet the above demands, and to provide multimedia contents to the called party's terminal by the calling information display method before the day call is established between the terminals. The purpose of the present invention is to provide a multimedia content providing method.

A method according to an embodiment of the present invention for achieving the above object comprises: a first step of authenticating whether the calling party terminal subscribes to the multimedia calling information service upon receiving a call connection request from the calling terminal to the called terminal; A second step of retrieving the content registered by the calling terminal user if the subscriber is subscribed to the multimedia origination information service as a result of the authentication, and confirming the attribute and related media information of the inquired content; If the called terminal specifies early session support, it transmits the media information of the called terminal to the calling terminal, and confirms to the called terminal using the temporary response of the calling terminal. A third step of inquiring whether the content is supported; A fourth step of instructing the called terminal to determine appropriate multimedia content with reference to the terminal information received as a result of the content support query; And a fifth step of transmitting the determined multimedia content to the called terminal through an early session.

On the other hand, the method according to another embodiment of the present invention, when receiving a call connection request from the calling terminal to the called terminal, the first step of authenticating whether or not the calling terminal subscribes to the multimedia call information service; A second step of retrieving the content registered by the calling terminal user if the subscriber is subscribed to the multimedia origination information service as a result of the authentication, and confirming the attribute and related media information of the inquired content; If the first terminal does not specify early session support, the media information of the called terminal is transmitted to the calling terminal, and a temporary response of the calling terminal is transmitted to the called terminal. Third step; A fourth step of inquiring of an early session support command and whether the checked content is supported by the called terminal when receiving a response to the temporary response transmission from the called terminal; A fifth step of instructing the called terminal to determine appropriate multimedia content with reference to the terminal information received as a result of the content support query; And a sixth step of transmitting the determined multimedia content to the called terminal through an early session.

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 embodiment of a communication network to which the present invention is applied.

The communication network to which the present invention is applied is provided with a system (hereinafter, referred to as a "SIP system") for providing a data call call service between terminals based on a session initiation protocol. It will be readily understood by those skilled in the art that basic components are provided, such as a SIP exchange processing a, a location server that registers / provides location information (routing information) and the like of the terminal.

In particular, in order to provide multimedia content to a called terminal in the call information display method of the present invention, a multimedia call information providing server (aka SIP application server) 10, subscriber DB 11, media server 12 on the SIP system. ) And the content DB 13 are configured.

On the other hand, the terminal used in the present invention as in the existing data call call service as a mobile communication terminal 14, IP telephone 15, computer 16, notebook 17, PDA 18, landline telephone (19) ). Here, the communication network of FIG. 1 further includes a gateway for interworking heterogeneous networks so that a data call call service between terminals belonging to different communication networks is performed.

In the present invention, the specification and support specifications of the called terminal should be equipped with an Internet connection function and a multimedia content playing function, a display capable of displaying the multimedia content playing result, and a speaker or earphone or handset or headset. Should be provided. Hereinafter, a description will be given with an example that a called terminal satisfies such a specification and a supporting specification, and it is clear that the calling terminal may be any terminal equipped with a call function through a data call.

As mentioned above, the present invention provides the multimedia content to the called terminal by the calling information display method. For example, even if a data call is not established between terminals, that is, when the called party does not answer the call (no answer state), or the called party checks the absence status or the called party is busy, the caller recognizes that the call is received from the calling party. In addition, even when the called party rings before the call is received, the terminal provides the called terminal with useful multimedia information which is basically provided by the calling party.

On the other hand, considering the characteristics of the service of the present invention (hereinafter referred to as "multimedia calling information service"), the multimedia content registered by the calling terminal user is provided to the called terminal user's specifications and support. Those skilled in the art will readily understand that the specification does not matter.

To this end, the calling terminal user can register his or her own terminal while subscribing to the multimedia calling information service through a web (wafer) site, a customer center, etc. operated by the multimedia calling information providing server 10 similarly to the existing calling information display service. Register. In addition, the calling terminal user may set multimedia contents (eg, text, image, video, etc.) to be shown to and / or heard by the called terminal user by default, setting by calling party, setting by calling party, setting by time zone, and called party. Register in accordance with the setting according to the state of the terminal (no answer, busy, missed). Here, when the user does not register the multimedia content, useful information (eg, news, weather information, advertisements, etc.) when performing the service is basically provided to the called terminal user in the form of multimedia content. In addition, it is preferable that multimedia, excluding audio contents, is provided to the called terminal so that the call of the called terminal user is not disturbed when the state of the called terminal is particularly busy. It is desirable to play the multimedia content after the call.

The multimedia outgoing information providing server 10 is based on the subscriber's input information, the multimedia outgoing information service subscription items (subscriber identity information, terminal information, etc.) and the multimedia content information registered by the subscriber (what kind of content to the called party to the called party) Whether to provide) and the media server information holding the corresponding content as a service profile to store in the subscriber DB 11 to perform the service of the present invention.

Here, in order for the calling terminal to perform the multimedia calling information service when the calling terminal requests the call service through the day call, the SIP exchange receiving the data call calling service request of the calling terminal for the first time is the multimedia calling information of the calling terminal. By checking the service subscription, the call of the calling terminal should be routed to the multimedia calling information providing server 10 so that service processing can be performed at the multimedia calling information providing server 10. Multimedia call information service subscription information is preferably stored.

Meanwhile, the media server 12 stores various multimedia contents in the content DB 13. When the media server 12 receives a content information inquiry from the multimedia origination information providing server 10, the media server 12 stores attributes of the corresponding content (eg, format information and playback codec). Etc.) Accordingly, the multimedia calling information providing server 10 transmits the attribute of the returned content to the called terminal and inquires whether it is a multimedia content that can be played back. Forwards the command to determine the multimedia content suitable for the called terminal and transmits it to the called terminal.

In particular, the media server 12 is an early session with the destination terminal before a data call is established between the originating terminal and the destination terminal by a regular session according to the command of the multimedia source information providing server 10. ) Establishes a data call and transmits the multimedia content to the called terminal.

Here, the regular session is a session for a data call about the call service with the called terminal user intended by the calling terminal user, and the early session is defined with the calling terminal (or called terminal) before the regular session is made. This is a session for data calls between servers (preferably in the present invention a media server). On the other hand, regular media refers to content that the calling terminal user (or called terminal user) wants to send to the other party, and early media refers to content provided from a specific server before receiving the specific content from the other party.

On the other hand, the multimedia information providing process of the calling information display method according to the present invention, if the receiving terminal specifies the early session support (that is, the receiving terminal succeeds in a session with a specific server before the regular session with the calling terminal is made); If you specify that you want to receive early media, and if you do not specify early session support on the called terminal (that is, the receiving terminal is successful in establishing a session with a specific server before a regular session with the calling terminal is established). Different processes). Hereinafter, this will be described in detail with reference to FIGS. 2A and 2B, and FIGS. 3A and 3B, respectively. The caller terminal will be described with reference numeral “50” and the caller terminal with reference numeral “60”. do.

2A and 2B are flowcharts illustrating an exemplary embodiment of a method for providing multimedia content in a call information display method when early session support is specified according to the present invention. On the other hand, the meaning of the message shown in Figs. 2A and 2B, for example, "an invite message [INVITE (sdp # 1)]" means sdp (session description) called "# 1" in the body of the invite message. protocol) information (i.e., media information (type) supported by the calling terminal 50) is inserted, and "sdp # 2" means media information supported by the called terminal 60. FIG. . In other words, the terms in parentheses indicate information, commands, etc., inserted in the body of the message.

First, the calling party terminal 50 transmits an invite message [INVITE (sdp # 1)] to the SIP system to request a call connection to the called party terminal 60 (200). At this time, preferably, the calling party terminal 50 connects to the SIP exchanger and transmits an invite message using the called party terminal information and its media information (media type supported by the calling party, etc.) as parameters. Ask the SIP exchange to establish a data call to 60. Accordingly, the SIP exchange determines that the calling terminal user is subscribed to the multimedia calling information service, and routes the invite message from the calling terminal 50 to the multimedia calling information providing server 10 to process the present invention. To perform. On the other hand, if the calling terminal user is not subscribed to the multimedia outgoing information service, the call processing is performed in the conventional manner.

Then, the multimedia origination information providing server 10 inquires a terminal profile (UA (User Agent) Profile, UA DB is not shown in the drawing) of the called terminal user, and whether the called terminal 60 is an early session support terminal. It is determined whether the terminal does not support the early session (201). 2A and 2B, a case in which the called terminal 60 is an early session support terminal will be described as an example.

Here, when receiving a call connection request from the calling party terminal 50 to the called party terminal 60, determining whether the called party 60 supports the early session support is determined by the multimedia outgoing information providing server 10. This is to set the operation mode depending on whether the support is specified or not. That is, the multimedia outgoing information providing server 10 may operate in any of proxy mode or B2BUA mode when the called terminal 60 is an early session support terminal. If the called terminal 60 is an early session unsupported terminal, it should operate only in the B2BUA mode.

For example, when the multimedia outgoing information providing server 10 operating in the proxy mode receives a call connection request from the calling party terminal 50 to the called party terminal 60, the same multimedia message received from the calling party terminal 50 is received. While the invite message having a dialog is transmitted to the called terminal 60, the multimedia originating information providing server 10 operated in the B2BUA mode is transferred from the calling terminal 50 to the called terminal 60. When a call connection request is received, a new invite message having a dialog different from the invite transaction received from the calling party terminal 50 is transmitted to the called party terminal 60. 2A and 2B, the multimedia originating information providing server 10 is operated in a proxy mode as an example.

Then, the multimedia call information providing server 10 inserts the calling party media information into the body of the invite message and transmits it to the called party terminal 60 to notify that there is a call connection request from the calling party terminal 50 ( 202). At this time, even if the called party terminal 60 receives the invite message, it should not ring its own local ring until the PRACK message and the 200 OK message are processed after the 180 ringing message is transmitted to the source information providing server 10. do.

That is, the called party terminal 60 prepares to receive the multimedia call information providing service without ringing its own local ring until the PRACK message and the 200 OK message are processed. In this case, refer to an early session support identifier (eg, "Supported: early-session") in the header of the 180 ringing message in response to an invite message [INVITE (sdp # 1)] of the calling terminal 50. In general, since the identifier is defined using text in SIP, the identifier does not need to have the same format / content as in the above example), and is transmitted to the multimedia originating information providing server 10. On the other hand, according to the 180 ringing message relay reception from the calling party terminal 50, its own local tone signal (ringback tone) is output to the receiver.

In addition, the multimedia call information providing server 10 prepares a multimedia call information service preprocessing process. The service information of the calling terminal user stored in the subscriber DB 11 is inquired and the content information registered by the subscriber ( The content is determined to be provided to the called party according to the condition), and the media server information holding the corresponding content is checked (203). Here, the service profile includes multimedia content (eg, text, image, video, etc.) according to the basic setting, the setting by the called party, the setting by the called group, the setting by the time zone, and the status of the called terminal (no answer, busy, or absent). It is registered corresponding to a setting or the like. In addition, it is preferable that multimedia, excluding audio contents, is provided to the called terminal so that the call of the called terminal user is not disturbed when the state of the called terminal is particularly busy. It is desirable to play the multimedia content after the call.

Thereafter, the multimedia originating information providing server 10 transmits an invite message [INVITE] to the media server 12 having the corresponding content by referring to the confirmed subscriber registration content information. And playback codec) (204).

Then, the media server 12 responds to the multimedia origination information providing server 10 by loading a corresponding content attribute (format information and playback codec) and related media information in a 200 OK message [200 OK (sdp ML)]. (205). Here, it is clear that "ML" is an abbreviation of multimedia lettering (a name commonly referred to as multimedia content provided by the present invention).

On the other hand, the called terminal 60 is a terminal capable of supporting an early session with its own sdp information (media information) in response to the invite message received in step 202. The session support identifier is included in the 180 ringing message 180 ringing (sdp # 2) and transmitted to the multimedia source information providing server 10 (206).

Then, the multimedia originating information providing server 10 checks whether the early session support identifier is inserted in the 180 ringing message (207), confirms that the early terminal support is specified in the called party terminal (60), Subsequently, a process (for example, a process of inquiring whether the content terminal is supported by the called party terminal 60 using the PRACK message received from the calling party terminal 50) for the case where early session support is specified is performed. At this time, the header of the 180 ringing message received from the called party terminal 60 is analyzed to determine whether an early session support identifier is inserted. On the other hand, as mentioned above, it has been determined whether the called terminal 60 specifies the early session support in the process "201", but it is preferable to check again to ensure more reliable call processing. 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 multimedia originating information providing server 10 sends a 180 ringing message [180 Ringing (sdp # 2)] in which the sdp information (sdp # 2) received from the called terminal 60 is inserted. 209.

Accordingly, the caller terminal 50 transmits a PRACK message to the multimedia origination information providing server 10 in a meaning that the caller terminal 50 has received a 180 ringing message (180 Ringing (sdp # 2)) (210).

Meanwhile, in response to receiving the 180 ringing message and the PRACK message, the multimedia origination information providing server 10 recognizes that the call connection preprocessing process between the calling party terminal 50 and the called party terminal 60 is completed. In step 205 ", the content property and the associated media information received from the media server 12 are prepared (211).

Then, since the called party terminal 60 specifies to support the early session, the multimedia originating information providing server 10 receives the PRACK message received from the calling party terminal 50 in step “210”. 60) by applying a relaying process, the content attribute and the related media information are put in a PRACK message [PRACK (e-sdp ML)] and transmitted to the called terminal 60 to inquire whether the content can be supported. (212).

Then, the called party terminal 60 grasps the received content property and related media information as a session negotiation procedure for processing multimedia outgoing information, and obtains terminal information {content support items (content support format, content support codec), IP address. , Port number, etc.] [Capability information (e-sdp # 2)] is loaded into the 200 OK message [200 OK (e-sdp # 2)] and responds to the multimedia source information providing server 10 (213).

Then, the multimedia outgoing information providing server 10 recognizes the preparation for providing the multimedia outgoing information service to the called party terminal 60 in response to the PRACK message received from the calling party terminal 50 in step “210”. In response to the 200 OK message is transmitted to the calling terminal 50 (214).

Then, the multimedia origination information providing server 10 is the terminal information (content support matters (content support format, content support codec), IP address, port number, etc.) of the destination terminal 60 [Capability information (e-sdp) # 2)] in an ACK message [ACK (e-sdp # 2)] to be transmitted to the media server 12 so that the media server 12 determines the multimedia content that can be supported by the called party's terminal 60. (215). Accordingly, the media server 12 determines the most suitable multimedia content by referring to content support items of the called party terminal 60 and the like.

Then, the multimedia origination information providing server 10 transmits the determined multimedia content transmission start command in the INFO message [INFO (play req)] to the media server 12 (216).

Then, after the media server 12 responds to the multimedia content transmission start command (217), the media server 12 establishes a data call with the called party terminal 60 and transmits the determined multimedia content to the real-time transmission protocol (RTP; Real-time). Using the Transport Protocol) and transmitting to the called terminal 60 (218).

Accordingly, the called party terminal 60 plays the received multimedia content, and the result of playing the multimedia content is displayed on the display and output through the speaker. At this time, the called party terminal 60 repeatedly plays the multimedia content at a predetermined time interval until the user answers the call and the call is made in order to prevent disconnection after playing once because the data amount of the multimedia content is small. Here, the multimedia content includes complex multimedia such as text, voice, sound, sound effect, audio, image, avatar, emoticon, video, flash animation, and the like.

Subsequently, when the receiver terminal picks up the handset (219), it notifies the multimedia origination information providing server 10 of the call response fact with a 200 OK message (220).

Then, the multimedia origination information providing server 10 recognizes the called party's call response and sends the multimedia content transmission stop command to the media server 12 by sending the command to the media server 12 in the buy message [BYE (stop req)]. Command to stop the transmission of the multimedia content, which has been provided in step (221).

Accordingly, the media server 12 stops the transmission of the multimedia content provided to the called terminal 60 and transmits a 200 OK message to the multimedia origination information providing server 10 in response to the buy message. 222).

Then, the multimedia originating information providing server 10 instructs the calling terminal 50 to establish a data call with the called terminal 60 because the called terminal 60 has answered the call (since the telephone is heard). In the meantime, the 200 OK message of the media server 12 is relayed to the calling terminal 50 to notify the fact that the call is answered (223).

Accordingly, the caller terminal 50 recognizes the call answering fact (200 OK message) of the called party terminal 60 and then establishes a data call with the called party terminal 60. It transmits to the provision server 10 (224).

Then, when the multimedia origination information providing server 10 receives the ACK message from the originating terminal 50, the caller terminal 50 is ready to establish a data call. In step 225, an ACK message is relayed to the called terminal 60 in the sense of commanding to establish a data call with the calling terminal 50.

Accordingly, after the multimedia terminal stops playing the multimedia content in the called party terminal 60 (226), a well-known session negotiation procedure is performed between the calling party terminal 50 and the called party terminal 60 to perform a data call. By establishing a real-time transport protocol (RTP) to establish a call between users or data transmission and reception (regular media transmission and reception) (227).

In addition, since a space may occur for a predetermined time during the session negotiation (during the transition from the early media to the regular media) between the calling terminal 50 and the called terminal 60, in the called terminal 50 Even after receiving the ACK message, it is preferable that the last image reproduced at the time of receiving the ACK message is still processed until the actual call path with the calling terminal 50 is formed.

On the other hand, after the data call is established between the calling terminal 50 and the called terminal 60, multimedia content that should be stopped after the process "222" due to network characteristics such as packet (IP traffic) delay, etc. When received at the called party terminal 60, the called party terminal 60 discards data other than packets received from the calling party terminal 50 using the packet filtering function provided by the real-time transmission protocol so that multimedia content can be received during the call. To prevent it from playing.

3A and 3B are flowcharts illustrating an exemplary embodiment of a method for providing multimedia content using an outgoing information display method when no early session support is specified according to the present invention. On the other hand, the meaning of the message shown in Figs. 3A and 3B, for example, "Invite message [INVITE (sdp # 1)]" means sdp (session description) called "# 1" in the body of the invite message. protocol) information (ie, media information (type) supported by the calling party terminal 50) is inserted, and "sdp # 2" refers to media information supported by the called party terminal 60. In other words, the terms in parentheses indicate information, commands, etc., inserted in the body of the message.

First, the calling party terminal 50 transmits an invite message [INVITE (sdp # 1)] to the SIP system to request a call connection to the called party terminal 60 (300). At this time, preferably, the calling party terminal 50 connects to the SIP exchanger and transmits an invite message using the called party terminal information and its media information (media type supported by the calling party, etc.) as parameters. Ask the SIP exchange to establish a data call to 60. Accordingly, the SIP exchange determines that the calling terminal user is subscribed to the multimedia calling information service, and routes the invite message from the calling terminal 50 to the multimedia calling information providing server 10 to process the present invention. To perform. On the other hand, if the calling terminal user is not subscribed to the multimedia outgoing information service, the call processing is performed in the conventional manner.

Then, the multimedia origination information providing server 10 inquires a terminal profile (UA (User Agent) Profile, UA DB is not shown in the drawing) of the called terminal user, and whether the called terminal 60 is an early session support terminal. It is determined whether the terminal does not support the early session (301). 3A and 3B, a case in which the called terminal 60 is an early session unsupported terminal will be described as an example.

Here, when receiving the call connection request from the calling party terminal 50 to the called party terminal 60, determining whether the called party 60 supports the early session support is the multimedia outgoing information providing server 10 supporting the early session. To set the operation mode depending on whether it is specified or not. That is, the multimedia outgoing information providing server 10 may operate in any of proxy mode or B2BUA mode when the called terminal 60 is an early session support terminal. If the called terminal 60 is an early session unsupported terminal, it should operate only in the B2BUA mode.

For example, when the multimedia outgoing information providing server 10 operating in the proxy mode receives a call connection request from the calling party terminal 50 to the called party terminal 60, the same multimedia message received from the calling party terminal 50 is received. While the invite message having a dialog is transmitted to the called terminal 60, the multimedia originating information providing server 10 operated in the B2BUA mode is transferred from the calling terminal 50 to the called terminal 60. When a call connection request is received, a new invite message having a dialog different from the invite transaction received from the calling party terminal 50 is transmitted to the called party terminal 60. 3A and 3B, the multimedia originating information providing server 10 is operated in the B2BUA mode as an example.

Then, the multimedia outgoing information providing server 10 operates in a B2BUA (Back-to-Back User Agent) mode of SIP, and has a separate message from the originating terminal 50's transaction [INVITE (sdp). # 1)] and inserts the calling party media information to the called party terminal 60 to notify that there is a call connection request from the calling party terminal 50 (302). At this time, even if the called party terminal 60 receives the invite message, it should not ring its own local ring until the PRACK message and the 200 OK message are processed after the 180 ringing message is transmitted to the source information providing server 10. do.

That is, the called party terminal 60 prepares to receive the multimedia call information providing service without ringing its own local ring until the PRACK message and the 200 OK message are processed, as described above with reference to FIGS. 2A and 2B. If the called terminal supports an early session, the early session support identifier is inserted into the header of the 180 ringing message and transmitted to the multimedia calling information providing server 10 in response to the invite message of the calling terminal 50. If the user (the called terminal) does not support the early session, the mobile terminal loads only the media information in the 180 ringing message and transmits it to the multimedia origination information providing server 10 as before. On the other hand, according to the 180 ringing message relay reception from the calling party terminal 50, its own local tone signal (ringback tone) is output to the receiver.

In addition, the multimedia call information providing server 10 prepares a multimedia call information service preprocessing process. The service information of the calling terminal user stored in the subscriber DB 11 is inquired and the content information registered by the subscriber ( The content is determined to be provided to the called party according to the condition) and the media server information holding the corresponding content is checked (303). Here, the service profile includes multimedia content (eg, text, image, video, etc.) according to the basic setting, the setting by the called party, the setting by the called group, the setting by the time zone, and the status of the called terminal (no answer, busy, or absent). It is registered corresponding to a setting or the like. In addition, it is preferable that multimedia, excluding audio contents, is provided to the called terminal so that the call of the called terminal user is not disturbed when the state of the called terminal is particularly busy. It is desirable to play the multimedia content after the call.

Thereafter, the multimedia originating information providing server 10 refers to the confirmed subscriber registration content information and transmits an invite message [INVITE] to the media server 12 having the corresponding content. And playback codec, etc.) (304).

Then, the media server 12 responds to the multimedia origination information providing server 10 by loading a corresponding content attribute (format information and playback codec) and related media information in a 200 OK message [200 OK (sdp ML)]. (305). Here, it is clear that "ML" is an abbreviation of multimedia lettering (a name commonly referred to as multimedia content provided by the present invention).

On the other hand, the called terminal 60 is ringing its own sdp information (media information) 180 because the terminal itself (the called terminal) can not support the early session in response to the incoming message received in the "302" process The message [180 Ringing (sdp # 2)] is loaded into the multimedia origination information providing server 10 is transmitted (306).

Then, the multimedia originating information providing server 10 checks whether the early session support identifier is inserted in the 180 ringing message (307), and confirms that the early terminal support is not specified in the called terminal 60 ( 308) After that, a process (for example, inquiring whether the early terminal support command and the content support are requested to the called terminal 60 using an update message) for the case where early session support is not specified is performed. At this time, the header of the 180 ringing message received from the called party terminal 60 is analyzed to determine whether an early session support identifier is inserted. On the other hand, as mentioned above, it has been determined whether the called terminal 60 to support the early session support in the "301" process, it is preferable to check again to make a more reliable call processing.

Then, the multimedia originating information providing server 10 sends a 180 ringing message [180 Ringing (sdp # 2)] in which the sdp information (sdp # 2) received from the called terminal 60 is inserted. Transmit to the network (309).

Accordingly, the calling party terminal 50 transmits a PRACK message to the multimedia calling information providing server 10 in a meaning of informing that it has received a 180 ringing message [180 Ringing (sdp # 2)] (310). The information providing server 10 transmits a 200 OK message to the calling terminal 50 in response (311). 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 multimedia origination information providing server 10 transmits a PRACK message to the called party terminal 60 in the sense that it has received the PRACK message from the calling party terminal 50 (312), the called party terminal 60 ) Transmits a 200 OK message to the multimedia source information providing server 10 in response (313).

Then, the multimedia source information providing server 10 receives a PRACK message from the calling party terminal 50, receives a 200 OK message from the called party terminal 60, the calling party terminal 50 and the called party terminal 60. Recognizing the completion of the call connection preprocessing between), the content attribute and the related media information received from the media server 12 are prepared (step 305).

Then, since the called party terminal 60 has not specified to support the early session, the multimedia origination information providing server 10 updates the content attribute and the related media information using an update message [UPDATE (sdp ML). )] Is sent to the called party terminal 60 to instruct the early session to support and asks whether the content can be supported (315). By such an update message, a session negotiation procedure for early media processing is attempted between the multimedia origination information providing server 10 and the called terminal 60.

Then, the called party terminal 60 grasps the received content property and related media information as a session negotiation procedure for processing multimedia outgoing information, and obtains terminal information {content support items (content support format, content support codec), IP address. , Port number, etc.} [Capability information (sdp # 2)] is loaded into the 200 OK message [200 OK (sdp # 2)] and responds to the multimedia origination information providing server 10 (316).

Then, the multimedia originating information providing server 10 is the terminal information (content support items (content support format, content support codec), IP address, port number, etc.) of the called terminal 60 [Capability information (sdp # 2) ] In an ACK message [ACK (sdp # 2)] and transmitted to the media server 12 so that the media server 12 determines the multimedia content that can be supported by the called terminal 60 (317). Accordingly, the media server 12 determines the most suitable multimedia content by referring to content support items of the called party terminal 60 and the like.

Then, the multimedia origination information providing server 10 loads the determined multimedia content transmission start command in the INFO message [INFO (play req)] and transmits it to the media server 12 (318).

Then, after the media server 12 responds to the multimedia content transmission start command (319), it establishes a data call with the called party's terminal 60 and transmits the determined multimedia content to the real-time transmission protocol (RTP; Real-time). A transport protocol is transmitted to the called party terminal 60 using the transport protocol (320).

Accordingly, the called party terminal 60 plays the received multimedia content, and the result of playing the multimedia content is displayed on the display and output through the speaker. At this time, the called party terminal 60 repeatedly plays the multimedia content at a predetermined time interval until the user answers the call and the call is made in order to prevent disconnection after playing once because the data amount of the multimedia content is small. Here, the multimedia content includes complex multimedia such as text, voice, sound, sound effect, audio, image, avatar, emoticon, video, flash animation, and the like.

Subsequently, when the receiver terminal picks up the handset (321) (321), it notifies the multimedia call information providing server 10 of the call answering fact with a 200 OK message (322).

Then, the multimedia origination information providing server 10 recognizes the called party's call response and sends the multimedia content transmission stop command to the media server 12 by sending the command to the media server 12 in the buy message [BYE (stop req)]. Command to stop the transmission of the multimedia content, which has been provided in step 323.

Accordingly, the media server 12 stops the transmission of the multimedia content provided to the called terminal 60 and transmits a 200 OK message to the multimedia origination information providing server 10 in response to the buy message. 324).

Then, the multimedia originating information providing server 10 instructs the calling terminal 50 to establish a data call with the called terminal 60 because the called terminal 60 has answered the call (since the telephone is heard). In the meantime, the 200 OK message of the media server 12 is relayed to the calling terminal 50 to notify the call response fact (325).

Accordingly, the caller terminal 50 recognizes the call answering fact (200 OK message) of the called party terminal 60 and then establishes a data call with the called party terminal 60. It transmits to the provision server 10 (326).

Then, when the multimedia origination information providing server 10 receives the ACK message from the originating terminal 50, the caller terminal 50 is ready to establish a data call. In operation 327, an ACK message is relayed to the called terminal 60 in the sense of commanding to establish a data call with the calling terminal 50.

Accordingly, after stopping the multimedia content playback in the called party terminal 60 (328), a well-known session negotiation procedure is performed between the calling party terminal 50 and the called terminal 60 to perform a data call. By establishing a real-time transport protocol (RTP), the user can make a call or transmit and receive data (regular media transmission and reception) (329).

In addition, since a space may occur for a predetermined time during the session negotiation (during the transition from the early media to the regular media) between the calling terminal 50 and the called terminal 60, in the called terminal 50 Even after receiving the ACK message, it is preferable that the last image reproduced at the time of receiving the ACK message is still processed until the actual call path with the calling terminal 50 is formed.

On the other hand, after the data call is established between the calling terminal 50 and the called terminal 60, the multimedia content that should be stopped after the "324" process due to network characteristics such as packet (IP traffic) delay, etc. When received at the called party terminal 60, the called party terminal 60 discards data other than packets received from the calling party terminal 50 using the packet filtering function provided by the real-time transmission protocol so that multimedia content can be received during the call. To prevent it from playing.

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 can provide multimedia contents such as audio, images, and video as well as text to the called party before a call is made between users in a call service through a data call, thereby satisfying a user's desire to enjoy multimedia. It has the effect of making it possible.

In addition, the present invention can send the regular media intended by the calling party to the called party in the state where the data call between the calling party and the called party is established, as well as before or when the data call between the calling party and the called party is established. Even if it is not, there is an effect that the sender can send the early media (early media) registered in advance to the called party in advance.

Claims (15)

A first step of authenticating whether the calling party terminal subscribes to the multimedia calling information service when receiving a call connection request from the calling party terminal to the called party terminal; A second step of retrieving the content registered by the calling terminal user if the subscriber is subscribed to the multimedia origination information service as a result of the authentication, and confirming the attribute and related media information of the inquired content; If the called terminal specifies early session support, it transmits the media information of the called terminal to the calling terminal, and confirms to the called terminal using the temporary response of the calling terminal. A third step of inquiring whether the content is supported; A fourth step of instructing the called terminal to determine appropriate multimedia content with reference to the terminal information received as a result of the content support query; And A fifth step of transmitting the determined multimedia contents to the called terminal through an early session; Multimedia content providing method of the call information display method comprising a. The method of claim 1, When the called terminal specifies early session support, when the called terminal information is received as a result of inquiring called terminal information when receiving a call connection request from the calling terminal to the called terminal, or / And receiving an early session support identifier from the called terminal as a result of transmitting a call connection request of the calling terminal to the called terminal. delete The method of claim 1, In the third step, If the called terminal specifies early session support, a 180 ringing message in which the media information received from the called terminal is inserted is transmitted to the calling terminal and received from the calling terminal as a result of the 180 ringing message transmission. Method for providing a multimedia content of the calling information display method characterized in that the content of the content and related media information is inserted into the body of the PRACK message and transmitted to the called terminal. The method according to any one of claims 1, 2 and 4, A sixth step of instructing transmission of the multimedia content upon receiving a response from the called terminal to the call connection request; And A seventh step of instructing the calling terminal and the called terminal to establish a data call between both terminals; Multimedia content providing method of the call information display method further comprising. The method of claim 5, The seventh step, Notifying the calling terminal of the call response of the called terminal using a 200 OK message; And transmitting the ACK message received as a result of the call response report to the called terminal. A first step of authenticating whether the calling party terminal subscribes to the multimedia calling information service when receiving a call connection request from the calling party terminal to the called party terminal; A second step of retrieving the content registered by the calling terminal user if the subscriber is subscribed to the multimedia origination information service as a result of the authentication, and confirming the attribute and related media information of the inquired content; If the first terminal does not specify early session support, the media information of the called terminal is transmitted to the calling terminal, and a temporary response of the calling terminal is transmitted to the called terminal. Third step; A fourth step of inquiring of an early session support command and whether the checked content is supported by the called terminal when receiving a response to the temporary response transmission from the called terminal; A fifth step of instructing the called terminal to determine appropriate multimedia content with reference to the terminal information received as a result of the content support query; And A sixth step of transmitting the determined multimedia content to the called terminal through an early session; Multimedia content providing method of the call information display method comprising a. The method of claim 7, wherein When the called terminal does not specify early session support, when the called terminal is confirmed as a terminal that does not support early sessions as a result of inquiring called terminal information when receiving a call connection request from the calling terminal to the called terminal. Or / and when the early session support identifier has not been received from the called terminal as a result of transmitting a call connection request of the calling terminal to the called terminal. delete The method of claim 7, wherein In the third step, If the called terminal does not specify early session support, a 180 ringing message including the media information received from the called terminal is inserted to the calling terminal, and as a result of the 180 ringing message transmission, Method of providing a multimedia content of the calling information display method characterized in that the transmission of the received PRACK message to the called terminal. The method of claim 7, wherein In the fourth step, The process of inquiring an early session support command and whether the checked content is supported by the called terminal is inserted into a body of an update message and transmitted to the called terminal by inserting attributes of the content and related media information. Multimedia content providing method of the call information display method. The method according to any one of claims 7, 8, 10 and 11, A seventh step of instructing transmission of the multimedia content upon receiving a response from the called terminal to the call connection request; And An eighth step of instructing the calling terminal and the called terminal to establish a data call between both terminals; Multimedia content providing method of the call information display method further comprising. The method of claim 12, The eighth step, Notifying the calling terminal of the call response of the called terminal using a 200 OK message; And transmitting the ACK message received as a result of the call response report to the called terminal. To the multimedia call information providing server connected to the wired and wireless communication network, A first step of authenticating whether the calling party terminal subscribes to the multimedia calling information service when receiving a call connection request from the calling party terminal to the called party terminal; A second step of retrieving the content registered by the calling terminal user if the subscriber is subscribed to the multimedia origination information service as a result of the authentication, and confirming the attribute and related media information of the inquired content; If the called terminal specifies early session support, it transmits the media information of the called terminal to the calling terminal, and confirms to the called terminal using the temporary response of the calling terminal. A third step of inquiring whether the content is supported; A fourth step of instructing the called terminal to determine appropriate multimedia content with reference to the terminal information received as a result of the content support query; And A fifth step of transmitting the determined multimedia contents to the called terminal through an early session; A computer-readable recording medium having recorded thereon a program for realizing this. To the multimedia call information providing server connected to the wired and wireless communication network, A first step of authenticating whether the calling party terminal subscribes to the multimedia calling information service when receiving a call connection request from the calling party terminal to the called party terminal; A second step of retrieving the content registered by the calling terminal user if the subscriber is subscribed to the multimedia origination information service as a result of the authentication, and confirming the attribute and related media information of the inquired content; If the first terminal does not specify early session support, the media information of the called terminal is transmitted to the calling terminal, and a temporary response of the calling terminal is transmitted to the called terminal. Third step; A fourth step of inquiring of an early session support command and whether the checked content is supported by the called terminal when receiving a response to the temporary response transmission from the called terminal; A fifth step of instructing the called terminal to determine appropriate multimedia content with reference to the terminal information received as a result of the content support query; And A sixth step of transmitting the determined multimedia content to the called terminal through an early session; A computer-readable recording medium having recorded thereon a program for realizing this.

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