KR101136653B1 - Apparatus and method for providing multimedia contents to terminals on early session - Google Patents

Abstract

The present invention relates to an apparatus and a method for providing multimedia content as an early media before a response of a called terminal to a calling terminal or a called terminal in a communication system, and to efficiently provide a user-specific multimedia content to a calling terminal or a called terminal.

To this end, the present invention, in the method for providing customized multimedia content to the calling terminal in the early session, receiving a call connection-related signal for call connection with the called terminal from the calling terminal, and the called terminal Receiving a response signal including first session description information for call connection from the server, receiving second session description information for providing the multimedia content from a media server, and receiving the first session in the response signal. Including description information and the second session description information and transmitting the description information to the calling terminal.

Description

Apparatus and method for providing multimedia contents as an early media to a calling terminal or a called terminal {APPARATUS AND METHOD FOR PROVIDING MULTIMEDIA CONTENTS TO TERMINALS ON EARLY SESSION}

The present invention relates to an apparatus and method for providing customized multimedia content to an originating terminal or a called terminal in an early session in a communication system, and more particularly, when a calling terminal requests a call to a called terminal, a user of the called terminal responds. The present invention relates to an apparatus and a method for efficiently providing multimedia contents to respective terminals.

IMS (IP Multimedia Subsystem) is a system for providing an IP-based packet communication service, and is a service platform that can facilitate the creation of a rich service communication environment and the integration of wired and wireless networks. First introduced in 3rd Generation Partnership Project (3GPP) Release 5, IMS is continually augmented and newly standardized.

Next Generation Network (NGN) environment based on IMS standard provides secure IP-based communication service through resource control and access control on packet delivery network. The NGN environment provides high value-added services to Session Initiation Protocol (SIP) multimedia phones based on the core session control system, IMS application server, and media server defined in the IMS standard. In addition, the NGN environment may include a media gateway controller to interoperate with circuit networks such as Plain Old Telephone Service (POTS) and Public Switched Telephone Network (PSTN) using a media gateway.

The NGN environment has a packet-based open network architecture that can integrate and accommodate all existing services (voice, data, video, etc.) as well as those that will emerge in the future. Therefore, the NGN environment provides users with an environment to select and guarantee the quality of service regardless of their location and type of network through an integrated wired / wireless terminal that is convenient to use anytime, anywhere. In addition, operators can build networks at low cost by using an open separation structure between access, delivery network, and services through NGN environment, and support service differentiation and roaming according to subscriber characteristics while securing the quality and reliability of packet network. have.

In general, IMS uses SIP as a protocol between an IP multimedia terminal and a system or a protocol between a system and a system. The IMS uses a private header (RFC3455) for the control required by the service provider such as subscriber ID display, access network, and billing, and uses an extended SIP standard for session management and control. In addition, Megaco (MEGACO, ITU-T H.248) is used as a protocol to control the media gateway, and SDP (Session Description Protocol, RFC3264) is used to transfer media connection information between the terminal or the media server and the protocol between terminals. do.

Recently, a communication system for providing a phone call may provide a call connection sound to the calling terminal or the called terminal until the user of the called terminal answers the call when the calling terminal requests the called terminal. In this case, the ring back tone provided by the calling terminal is called a ring-back tone, and the ring back tone provided by the called terminal is called a ringing tone. In a communication system such as a conventional public switched telephone network, Code Division Multiple Access (CDMA), and Wideband Code Division Multiple Access (W-CDMA), the performance and multimedia alerting of the terminal Since resources for providing are limited, the terminal does not receive various types of multimedia content or web content. That is, the calling terminal is provided with only a bell of an audio type preset by a basic bell, a calling party or a called party as a ringback tone, and the called terminal is provided with only a bell of an audio type previously stored as a ringing tone.

In a conventional SIP multimedia telephone environment, a procedure according to an INVITE message is performed to provide a bell to a called terminal, and if a caller's answer is terminated, the receiver terminates the ring service to provide a call data. RE-INVITE) message is executed. In the conventional SIP multimedia telephone environment, there is a problem in that a delay occurs between ringing tone transmission and actual call data transmission because a procedure according to a RE-INVITE message must be performed. In addition, since the conventional SIP multimedia telephone environment uses the same port and the same media for transmitting the RBT and transmitting the call data, a part of the call data is not transmitted when switching from the RBT to the call data transmission.

Accordingly, an object of the present invention is to efficiently provide multimedia contents specialized to a user to a calling terminal or a called terminal. In addition, another object of the present invention is to prevent a phenomenon in which part of the call data is cut out due to the transmission of the call connection sound from the calling terminal or the called terminal. In addition, another object of the present invention is to minimize the delay between the transmission of the RBT and the transmission of the call data in the calling terminal or the called terminal to quickly perform a call connection in response to the called party.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned above can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

In order to achieve the above object, the present invention provides a method for providing customized multimedia content in an early session to an originating terminal, wherein the call connection-related signal for call connection with the called terminal is transmitted from the originating terminal. Receiving a response signal including first session description information for call connection from the called terminal, receiving second session description information for providing the multimedia content from a media server; And including the first session description information and the second session description information in the response signal and transmitting the same to the originating terminal.

The present invention also provides a method for providing customized multimedia content to an called terminal on an early session, receiving a call connection related signal including first session description information for call connection with an originating terminal from the called terminal. Receiving second session description information for providing the multimedia content from a media server, transmitting a call connection related signal including the first session description information to the calling terminal, and transmitting the call. Receiving a response signal for the call connection-related signal from the terminal, and including the second session description information in the response signal and transmitting to the called terminal.

The present invention also provides a system for providing customized multimedia content to an originating terminal on an early session, receiving a call connection related signal for call connection with a called terminal from the calling terminal, and connecting the call from the called terminal. A first server for receiving a response signal including first session description information for the first server, including the first session description information and the second session description information in the response signal, and transmitting the response signal to the calling terminal; And a media server for transmitting description information to the first server, wherein the second session description information is for providing the multimedia content.

In addition, the present invention, in the system for providing customized multimedia content to the called terminal on the early session, receiving a call connection-related signal including the first session description information for the call connection with the calling terminal from the called terminal And transmitting the call connection related signal to the calling terminal, receiving a response signal for the call connection related signal from the calling terminal, and including the second session description information in the reply signal to the called terminal. A first server and a media server for transmitting the second session description information to the first server, wherein the second session description information is for providing the multimedia content.

The present invention also provides a method for providing customized multimedia content to an originating terminal on an early session, the method comprising: receiving a call connection related signal for call connection with a called terminal from the calling terminal; Receiving a response signal including first session description information for call connection to form a first dialog; receiving second session description information for providing the multimedia content from a media server; Transmitting the second session description information to form a second dialog; instructing the media server to transmit the multimedia content customized for each subscriber to the calling terminal; and the first session description information. Session setting to include in the first dialog and transmit to the calling terminal; Name information transmission step.

The present invention also provides a method for providing multimedia content to a called terminal, the method comprising: receiving a call connection related signal for call connection with the called terminal from a calling terminal, and a first call connecting call from the called terminal. Receiving a response signal including session description information to form a first dialog, receiving second session description information for providing the multimedia content from a media server, and explaining the second session to the called terminal. Transmitting information to form a second dialog, instructing the media server to transmit the multimedia content customized for each subscriber to the called terminal, and transmitting the first session description information in the first dialog. Including the first session description information transmission step of including and transmitting to the originating terminal. .

The present invention also provides a system for providing customized multimedia content to an originating terminal on an early session, receiving a call connection related signal for call connection with a called terminal from the calling terminal, and connecting the call from the called terminal. Receiving a response signal including first session description information for forming a first dialog; transmitting second session description information for providing the multimedia content to the calling terminal to form a second dialog; A first server including the first session description information in the first dialog and transmitting to the calling terminal, and transmitting the second session description information to the first server and receiving a command from the first server to the calling terminal. And a media server for transmitting the multimedia content customized for each subscriber.

In addition, the present invention, in the system for providing customized multimedia content to the called terminal on the early session, receiving a call connection-related signal for call connection with the called terminal from the calling terminal, the call connection from the called terminal Receiving a response signal including first session description information for forming a first dialog, transmitting second session description information for providing the multimedia content to the called terminal, and forming a second dialog; A first server that includes first session description information in the first dialog and transmits the second session description information to the originating terminal, and receives the command of the first server to the called terminal; And a media server for transmitting the multimedia content customized for each subscriber.

According to the present invention as described above, it is possible to efficiently provide the multimedia content specialized to the user to the calling terminal or the called terminal. In particular, according to the present invention, it is possible to prevent a phenomenon in which part of the call data is cut out due to the transmission of the RBT in the calling terminal or the called terminal.

The above objects, features, and advantages will be described in detail with reference to the accompanying drawings, whereby those skilled in the art to which the present invention pertains may easily implement the technical idea of the present invention. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a communication network to which the customized multimedia content providing system 100 is connected in an early session according to the present invention. The multimedia content providing system 100 includes a first server 110, a media server 120, and call session control servers 130 and 140, and is connected to the calling terminal 150 and the called terminal 160.

The multimedia content providing system 100 according to the present invention is not limited to an NGN environment based on the IMS standard, but also includes an Internet network including a SIP proxy server, a SIP-based application server, and a SIP-based media server. Can be applied. In addition, the present invention will be described using MEGACO, SIP, SDP protocol as an example of the preferred embodiment of the protocol used for the transfer of messages or signals between each node, the multimedia content providing system 100 according to the present invention other IP Based protocols may also be applied.

The first server 110 is connected to the media server 120 and the call session control servers 130 and 140 to perform signal processing for providing a call connection and providing multimedia content between the calling terminal 150 and the called terminal 160. . In the NGN environment, the first server 110 may be configured as an application server. In this case, the first server 110 performs all of the tasks generally performed by the application server, and the multimedia content described in the present invention. Perform additional work to provide. The first server 110 receives the message from the calling party call control server 130 and delivers the message to the called party call control server 140 as it is, or after processing the received message, the called party call session control server 140 To pass. Conversely, the first server 110 may receive the message from the called party call session control server 140 and transmit the message to the calling party call control server 130. In addition, the first server 110 receives a message from the media server 120 or instructs the media server 120 to transmit a ringback tone or a ringing tone to each of the terminals 150 and 160.

The media server 120 stores multimedia content to be provided to each terminal 150 and 160. The media server 120 is connected to the first server 110 and transmits the multimedia content stored under the command of the first server 110 to the calling terminal 150 as a ringback tone, or sends the multimedia content to the called terminal 160. Is transmitted as a ring tone. The multimedia content transmitted to each of the terminals 150 and 160 may be configured in various forms such as an image, a sound source, an image, a text, and the like, and may be differently set according to a caller, a caller, a call area, etc. by a caller or a called party. . The multimedia content setting by the caller or the called party may be stored as setting information in at least one of the media server 120, the calling terminal 150, and the called terminal 160.

Call Session Control Function (CSCF) (130, 140) is a server responsible for the part related to call and session processing, functioning as a gateway to the incoming call to the multimedia content providing system 100 (Incoming Call It performs Gateway, Call Control Function, Serving Profile Database, and Address Handling. The function as a gateway for an incoming call means performing routing and service triggering on an incoming call as an entry point of the multimedia content providing system 100. The call control function means setting up and terminating a call, managing status and events, reporting a call event for charging, and receiving and processing an application level registration. The SPD function refers to a function of managing subscriber profile information by communicating with a home subscriber server (HSS) of a home domain and informing a subscriber of a home domain upon initial access.

The call session control servers 130 and 140 are classified into a proxy call session control server (Proxy-CSCF), a serving call session control server (Serving-CSCF), and an interworking call session control server (Interrogating-CSCF). As shown in FIG. 1, the call session control servers 130 and 140 perform basic call / session processing functions, and when a call request from each terminal 150 or 160 is received, it is determined that the call is a service subscriber. And trigger the first server 110 to serve as an intermediate bridge connecting the sessions. The call session control server (130, 140) triggers and forwards a message from each terminal (150, 160) to the first server (110), or receives a message from the first server (110) for each terminal (150, 160).

The calling terminal 150 and the called terminal 160 may be wired, wireless or wired and wireless integrated terminals, and are connected to the multimedia content providing system 100. Each terminal 150 and 160 transmits a message to or receives a message from the first server 110 through the call session control server 130 and 140. Meanwhile, the calling terminal 150 and the called terminal 160 may receive a ringback tone or a ringing tone from the media server 120, respectively. In order to connect a call between the calling terminal 150 and the called terminal 160, each terminal 150 and 160 transmits and receives a message through the multimedia content providing system 100, and when the call is connected, each terminal 150 and 160 is connected. Send and receive bearer data directly.

2 is a block diagram of a communication network according to an embodiment of the present invention. Multimedia content providing system 200 according to an embodiment of the present invention is a conventional circuit network, such as PSTN, Integrated Services Digital Network (ISDN), Public Land Mobile Network (PLMN) through the signal gateway 224 and trunking gateway 226 And 230. The multimedia content providing system 200 is connected to the access gateway 222, the telephone 250, and the terminal 260 through the NGN packet network 220. In addition, the multimedia content providing system 200 is connected to another NGN or IMS network 232.

The access gateway 222 converts PSTN voice and packet voice to each other, and allows the media gateway controller 214 to perform call control with the telephone 250. The signal gateway 224 performs signal conversion with the conventional circuit network 230, and the trunking gateway 226 performs media conversion with the conventional circuit network 230. The web server 240 is used by the subscriber to configure or set the multimedia content. The telephone 250 is a conventional telephone that can be connected to a PSTN telephone network, and the terminal 260 is an IP-based multimedia telephone terminal that can be connected to an NGN packet network.

As shown in FIG. 2, the multimedia content providing system 200 includes an application server 202, a subscriber information server 204, a serving call session control server 206, a coordinated call session control server 208, and a media server ( 210, proxy call session control server 212, and media gateway controller 214.

The application server 202 controls message flow for call connection and performs signal processing for providing customized multimedia content on an early session. The application server 202 may query the subscriber information server 204 for information such as subscriber, service, etc. in order to make a decision necessary for message flow control or signal processing. The subscriber information server 204 stores the subscriber's service subscription and service request information. The service request information is customized for each subscriber and means profile information on multimedia content and billing data to be selected and transmitted according to call time, call date, call counterpart, call location, and the like.

The serving call session control server 206 performs the requested call processing from the phone 250 and the terminal 260, and transfers the service call in association with the corresponding application server 202 when the service call processing is requested. The interworking call session control server 208 is in charge of interworking with other NGN / IMS networks 232. The interworking call session control server 208 serves as a contact point for all calls requested to connect to a subscriber in the multimedia content providing system 200 and as a contact point with other NGN / IMS network 232 subscribers. Due to this role, the interworking call session control server 208 generally acts as a firewall and prevents the network configuration, topology, and capacity of the operator from being exposed to the outside. The proxy call session control server 212 is a node that is first encountered when the terminal 260 accesses the multimedia content providing system 200. The proxy call session control server 212 stores the address of the serving call session control server 206 and forwards the SIP message from the terminal 260 to the serving call session control server 206.

The media server 210 receives and stores the actual media file of the multimedia content configured by the subscriber through the web server 240 from the web server 240. The media server 210 transmits the multimedia content media file through the call path after connecting the calling terminal or the called terminal to the call path according to the signal control of the application server 202. The media gateway controller 214 performs call processing on the PSTN telephone 250 in the multimedia content providing system 200, and interacts with the corresponding application server 202 to provide a service or serve when service call processing is required. The service call is forwarded to the call session control server 206.

3A is a flowchart of a method for providing customized multimedia content on an early session to an originating terminal 150 in accordance with the present invention. A method of providing multimedia content according to the present invention will be described with reference to FIG. 1.

First, the first server 110 receives a call connection related signal for call connection with the called terminal 160 from the calling terminal 150 (302). The call connection related signal may include information on the function of the calling terminal 150. The function information of the calling terminal 150 may be whether the calling terminal 150 may simultaneously provide a session for call connection and a session for multimedia content, and the first server 110 may call the calling terminal 150. The signal can be controlled according to the function information of. That is, according to the function of the calling terminal 150, the first server 110 may process a signal to perform the multimedia content providing method according to the present invention only when the calling terminal 150 may simultaneously provide two sessions. Can be.

When the first server 110 transmits the received call connection-related signal to the called terminal 160, the called terminal 160 transmits a response signal including the first session description information as a response to the first server 110. To send. The first session description information is information about a session used for call connection between the calling terminal 150 and the called terminal 160. The first server 110 receives 304 a response signal including the first session description information from the called terminal 160.

The first server 110 may request 306 the second session description information from the media server 120. The second thin line description information is used for providing multimedia content. The first server 110 receives 308 second session description information from the media server 120. The first server 110 includes the first session description information received from the called terminal 160 and the second session description information received from the media server 120 together in the response signal and transmits them to the calling terminal 150 (310). )do. The media server 120 may transmit 312 the multimedia content to the calling terminal 150 using the second session description information according to the command of the first server 110. In this case, the transmitted multimedia content may be selected by information set in at least one of the media server 120, the calling terminal 150, and the called terminal 160.

3B is a flowchart of a method for providing multimedia content to a terminating terminal 160 in accordance with the present invention. A method of providing multimedia content according to the present invention will be described with reference to FIG. 1.

The first server 110 receives a call connection related signal for call connection with the calling terminal 150 from the called terminal 160 (322). That is, the called terminal 160 transmits a call connection related signal to the first server 110, which may be a response to a call connection request from the calling terminal 150. The call connection related signal includes first session description information, and the first session description information is information on a session used for call connection between the calling terminal 150 and the called terminal 160. The call connection related signal may include information on the function of the called terminal 160. The function information of the called terminal 160 may be whether the called terminal 160 may simultaneously provide a session for call connection and a session for providing multimedia content, and the first server 110 may call the called terminal 160. You can control the signal according to the function of). That is, only when the called terminal 160 can provide two sessions at the same time, the first server 110 may process a signal to perform the multimedia content providing method according to the present invention.

The first server 110 may request 324 second session description information from the media server 120, and the second thin description information is used for providing multimedia content. The first server 110 receives 326 second session description information from the media server 120. The first server 110 transmits a call connection related signal including the first session description information to the calling terminal 150 (328), and receives a response signal 330 from the calling terminal 150. The first server 110 includes the second session description information received from the media server 120 in the received response signal and transmits it to the called terminal 160 (332). The media server 120 may transmit 324 the multimedia content to the destination terminal 160 using the second session description information according to the command of the first server 110. In this case, the transmitted multimedia content may be selected by information set in at least one of the media server 120, the calling terminal 150, and the called terminal 160.

In both the ringback tone provision described in FIG. 3A and the ringtone provision described in FIG. 3B, call connection related signals and response signals may be configured as SIP messages. The first session description information and the second session description information may be configured as headers or body parts of call connection related signals or response signals. In addition, the first session description information and the second session description information may include different port information and different media information. The port and media information included in the first session description information are information for a session used for transmitting and receiving call media between the calling terminal 150 and the called terminal 160. The port and media information included in the second session description information Information for a session used for transmitting multimedia content of the media server 120. In this way, the terminal 150 or 160 receiving the multimedia content can prepare a session for the call media (call data) and the multimedia content (call connection sound), so that part of the call data is cut and sent when the called party answers. The phenomenon can be prevented. Accordingly, call connection sound and call data do not overlap in each terminal 150 and 160.

4 is a signal flow diagram of a method for providing multimedia content to an originating terminal 150 according to an embodiment of the present invention. A signal flow between the first server 110, the media server 120, the calling terminal 150, and the called terminal 160 for providing multimedia content to the calling terminal 150 will be described. FIG. 4 omits and illustrates a signal transmission process by the call session control server between the first server 110 and each of the terminals 150 and 160.

The first server 110 receives 402 an INVITE message, which is a call connection related signal, from the calling terminal 150 and transmits the received message to the called terminal 160 (404). The INVITE message is delivered as an Offer with a Supported: 100rel, early-session tag. The 100rel tag is used to reliably exchange session description information by sending and receiving a PRACK that is reliably received when receiving a provisional response delivered before the final call response. The early-session tag is the functional information of the originating terminal 150, which indicates that the originating terminal 150 can simultaneously provide a session for call connection and a session for multimedia content. The receiving terminal 160 receiving the INVITE message includes an answer including a Require: 100rel, an early-session header, an RSeq header, and the first session description information in the provision response 18x message. The first server 110 transmits the message to the first server 110. The first server 110 receives 406 the response signal including the first session description information.

The first server 110 sends an INVITE message to the media server 120 to request 408 the second session description information, and 200 OK including the second session description information from the media server 120. Receive 410 a message. The first server 110 transmits 412 the first session description information and the second session description information to the calling terminal 150 by including the message 183. 183 The session progress message includes information on the first session as "Content-Disposition: session" and information about the second session as "Content-Disposition: early-session" in the session description. , This becomes an Answer for the first session and an Offer for the second session, respectively. The originating terminal 150 transmits 414 the PRACK message to the first server 110 as an answer to the second session by including the second session description information in the session description in the PRACK message. The first server 110 transmits the second session description information to the media server 120 (416), and transmits (418) a PRACK message to the destination terminal (160). As a result, the calling terminal 150 may divide and prepare ports and media for call data and multimedia content according to the first session description information and the second session description information. A 200 OK message and a 180 ring message are transmitted from the called terminal 160 to the calling terminal 150 (420, 422, 424, 426).

The media server 120 transmits 428 the multimedia content to the calling terminal 150 through the second session, and the calling terminal 150 sends the multimedia content as a ringback tone. When the called party answers and the calling terminal 150 and the called terminal 160 exchange the final call response (430, 432, 434, 436), through the first session between the calling terminal 150 and the called terminal 160 The call path is connected 438. The calling terminal 150 switches the work from ringback tone transmission to call data transmission, and thus does not cause a problem that a part of the call data is not transmitted.

5 is a signal flow diagram of a method for providing multimedia content to a terminating terminal 160 according to an embodiment of the present invention. A signal flow between the first server 110, the media server 120, the calling terminal 150, and the called terminal 160 for providing multimedia content to the called terminal 160 will be described. 5 omits and illustrates a signal transmission process by the call session control server between the first server 110 and each terminal 150 and 160.

The first server 110 receives (502) an INVITE message from the calling terminal 150 and delivers it to the called terminal 160 (504). The first server 110 receives 506 a message 183, which is a call connection-related signal including the first session description information, from the called terminal 160, and then sends a 183 message including the first session description information to the originating terminal ( 150). When the first server 110 receives (510) a PRACK message that is a response signal from the originating terminal 150, transmits an INVITE message requesting the second session description information to the media server 120 (512). In step 514, a 200 OK message including the second session description information is received. Requesting and receiving the second session description information 512, 514 of the first server 110 may be performed prior to sending 508 a 183 message to the originating terminal 150.

The first server 110 transmits 516 the second session description information to the called terminal 160 by including the second session description information in the PRACK message, which is a response signal received from the calling terminal 150. The transmission 516 of the second session description information becomes an offer to the ringing tone. The first server 110 receives (518) a 200 OK message including an answer to the ringing tone from the called terminal 160. As a result, the called terminal 160 may divide and prepare ports and media for call data and multimedia content according to the first session description information and the second session description information. The first server 110 transmits a response to the ring tone to the media server 120 (522), and transmits (520) a 200 OK message to the calling terminal 150. The media server 120 transmits 524 the multimedia content to the called terminal 160 as a ring tone. The first server 110 transmits (526) a 180 ring message to the calling terminal 150.

When the called terminal 160 receives the multimedia content 524 and transmits a ringing tone, and the user of the called terminal 160 responds, the calling terminal 150 and the called terminal 160 exchange the final call response (528, 530, 532, 534 and a call path is connected 540 between the calling terminal 150 and the called terminal 160. The destination terminal 160 switches the work from ringing tone transmission to call data transmission, so that a part of the call data is not transmitted.

6 is a flowchart illustrating a method for providing multimedia content according to the present invention. Referring to FIG. 1, a method of providing customized multimedia content in an early session according to the present invention will be described.

First, a method of providing multimedia content as a ringback tone to the calling terminal 150 will be described. The first server 110 receives a call connection related signal for call connection with the called terminal 160 from the calling terminal 150 (602). The call connection related signal may include information on the function of the calling terminal 150. The function information of the calling terminal 150 may be whether the calling terminal 150 can provide two or more dialogs at the same time, and the first server 110 according to the function information of the calling terminal 150. You can control the signal. That is, according to the function of the calling terminal 150, the first server 110 may process a signal to perform the multimedia content providing method according to the present invention only when the calling terminal 150 can simultaneously provide two or more dialogs. Can be.

When the first server 110 transmits the received call connection-related signal to the called terminal 160, the called terminal 160 sends a response signal including the first session description information as a response to the first server 110. To send. The first session description information is information about a session used for call connection between the calling terminal 150 and the called terminal 160. The first server 110 receives a response signal including the first session description information to form a first dialog (604).

The first server 110 receives 606 second session description information used for providing multimedia content from the media server 120. The first server 110 may request the second session description information from the media server 120 before the step 606 of receiving the second session description information. The first server 110 transmits the received second session description information to the calling terminal 150 to form a second dialog (608). The first server 110 instructs the media server 120 to transmit the multimedia content to the calling terminal 150 (in this case, can be instructed using a SIP INFO message) (610), and the multimedia content transmission command ( According to 610, the media server 120 may transmit the multimedia content to the calling terminal 150. The transmitted multimedia content may be selected by information set in at least one of the media server 120, the calling terminal 150, and the called terminal 160. The first server 110 includes the first session description information in the first dialog and transmits it to the calling terminal 150 (612), where the transmitting step 612 is performed in parallel with the transmission of the multimedia content of the media server 120. Can be performed.

Next, a method of providing multimedia content as a ringing tone to the destination terminal 160 will be described. The first server 110 receives a call connection related signal for call connection with the called terminal 160 from the calling terminal 150 (602). When the first server 110 transmits the received call connection-related signal to the called terminal 160, the called terminal 160 sends a response signal including the first session description information as a response to the first server 110. To send. The first session description information is information about a session used for call connection between the calling terminal 150 and the called terminal 160. The first server 110 receives a response signal including the first session description information to form a first dialog (604).

The response signal may include information about the function of the called terminal 160. The function information of the called terminal 160 may be whether the called terminal 160 can provide two or more dialogs at the same time, and the first server 110 sends a signal according to the function information of the called terminal 160. Can be controlled. That is, the first server 110 may process a signal to perform the multimedia content providing method according to the present invention only when the called terminal 160 can simultaneously provide two or more dialogs according to the function of the called terminal 160. Can be.

The first server 110 receives 606 second session description information used for providing multimedia content from the media server 120. The first server 110 may request the second session description information from the media server 120 before the step 606 of receiving the second session description information. The first server 110 transmits the received second session description information to the called terminal 160 to form a second dialog (608). The first server 110 instructs the media server 120 to transmit the multimedia content to the called terminal 160 (in this case, can be instructed using a SIP INFO message) (610), and the multimedia content transmission command ( According to 610, the media server 120 may transmit the multimedia content to the called terminal 160. The transmitted multimedia content may be selected by information set in at least one of the media server 120, the calling terminal 150, and the called terminal 160. The first server 110 includes the first session description information in the first dialog and transmits it to the calling terminal 150 (612), where the transmitting step 612 is performed in parallel with the transmission of the multimedia content of the media server 120. Can be performed.

In both the ringback tone provisioning and the ringing tone provisioning case, the first session description information and the second session description information may be configured as a header or body part of the SIP message. In addition, the first session description information and the second session description information may include different port information and different media information. The port and media information included in the first session description information are information for a session used for transmitting and receiving call media between the calling terminal 150 and the called terminal 160. The port and media information included in the second session description information Information for a session used for transmitting multimedia content of the media server 120. By using the two or more dialogs, the terminal 150, 160 receiving the multimedia content can prepare a session for the call media (call data) and the multimedia content (call ring tone), thereby making a call when the called party answers. Quickly switch between ring tone and call data.

7 is a signal flow diagram of a method for providing multimedia content to an originating terminal 150 according to an embodiment of the present invention. A signal flow between the first server 110, the media server 120, the calling terminal 150, and the called terminal 160 for providing multimedia content to the calling terminal 150 will be described. FIG. 7 omits and illustrates a signal transmission process by the call session control server between the first server 110 and each of the terminals 150 and 160.

The first server 110 receives (702) an INVITE message, which is a call connection related signal, from the originating terminal 150 and transmits it to the called terminal 160 (704). The first server 110 receives the 180 response message including the first session description information from the called terminal 160 to form a dialog D1 (604). The first server 110 transmits 708 an INVITE message to the media server 120 and receives 710 a 200 OK message, which is a response message. At this time, the 200 OK message includes the second session description information. The first session description information includes information about a session used for transmitting and receiving call data, and the second session description information includes information about a session used for ringback tone transmission.

The first server 110 receiving the second session description information from the media server 120 includes the second session description information in the 183 provision response message and transmits it to the calling terminal 150 (718). This forms 718 a dialog D2. In response, the first server 110 receives a PRACK message from the originating terminal 150 (714) and exchanges (718) a 200 OK message. The first server 110 instructs the media server 120 to send a ringback tone to the calling terminal 150 (716, 720, 722). The media server 120 transmits 724 the multimedia content to the calling terminal 150 as a ringback tone. In parallel with the ringback tone transmission 724, the first server 110 includes the second session description information in the terminating terminal 160 response in the dialog D1 as Answer B to the originating terminal 150 in response to the 183 provisioning response. Send in a message (726). As a response to the 183 provisioning response message 726 between the originating terminal 150 and the terminating terminal 160, a PRACK message and a PRACK response message are exchanged (728, 730, 732, 734).

When the called party lifts the handset of the called terminal 160, the called terminal 160 transmits 736 the final call response to the first server 160. Upon receiving the final call response (736), the first server 110 terminates the connection to the media server 120 (738, 740) and transmits an incoming call response 200 OK message to the calling terminal 150 on the dialog D1 ( 742). A final response is made between the originating terminal 150 and the terminating terminal 160 (744, 746), and the connection to the call is made immediately (748). Since the first server 110 separately configures sessions for call media (call data) and ringback tone (call connection tone), divides the dialogues into D1 and D2 and transmits them to the calling terminal 150, the calling terminal 150 rings. The first session description information may be received (726) while transmitting the backtone (724) to prepare for the session for the call media in advance. As a result, the calling terminal 150 may quickly switch to the call connection when the called party's response 736 by minimizing a delay time between the call data transmission and the call connection sound transmission.

When the first server 110 receives the final response from the called terminal 160 (736), the first server 110 terminates the dialog D2 (738, 740), the stream that was delivered to the calling terminal 150 is It may remain and be transmitted as it is, and it may be difficult for the originating terminal 150 to distinguish the remaining stream. As a separate function assigned to the calling terminal 150, the calling terminal 150 deletes the dialog D2 and stops sending the multimedia content when the final incoming response arrives (742) while sending the multimedia content onto the dialog D2. The call media can then be received and sent on dialog D1.

The apparatus and system described above may be implemented in hardware, software, or a combination thereof. In a hardware implementation, the modules used to provide the multimedia content may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing units (DSPDs), programmable logic units (PLDs), field programmable A gate array (FPGA), a processor, a controller, a micro-controller, a microprocessor, another electronic unit designed to perform the functions described herein, or a combination thereof. The software may be implemented through a module that performs the functions described herein. Software code may be stored in memory units and executed by a processor. The memory unit may be implemented inside or outside the processor, in which case the memory may be coupled to the processor via various known means.

On the other hand, the method of the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily inferred by a computer programmer in the art. In addition, the written program is stored in a computer-readable recording medium (information storage medium), and read and executed by a computer to implement the method of the present invention. And the recording medium includes all types of recording media (intangible medium such as a carrier wave as well as tangible media such as CD and DVD) readable by a computer.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

1 is a block diagram of a communication network to which the multimedia content providing system 100 according to the present invention is connected.

2 is a block diagram of a communication network according to an embodiment of the present invention.

3A is a flowchart of a method for providing multimedia content to a calling terminal 150 according to the present invention.

3B is a flowchart of a method for providing multimedia content to a terminating terminal 160 in accordance with the present invention.

4 is a signal flow diagram of a method for providing multimedia content to an originating terminal 150 according to an embodiment of the present invention.

5 is a signal flow diagram of a method for providing multimedia content to a terminating terminal 160 according to an embodiment of the present invention.

6 is a flowchart illustrating a method for providing multimedia content according to the present invention.

7 is a signal flow diagram of a method for providing multimedia content to an originating terminal 150 according to an embodiment of the present invention.

Claims (20)

In the method for providing customized multimedia content on the early session to the calling terminal, Receiving a call connection related signal for call connection with a called terminal from the calling terminal; Receiving a response signal including first session description information for call connection from the called terminal; Receiving second session description information for providing the multimedia content from a media server; Transmitting the first session description information and the second session description information to the originating terminal in the response signal. A method for providing customized multimedia content on an early session comprising a. The method of claim 1, Transmitting, by the media server, the multimedia content to the calling terminal by using the second session description information. The method of claim 1, further comprising the customized multimedia content on the early session. The method of claim 1, The port and media information included in the first session description information are different from the port and media information included in the second session description information. The method of claim 1, The call connection related signal includes function information of the calling terminal, The function information of the calling terminal includes whether the calling terminal can simultaneously provide a session for call connection and a session for the multimedia content. The method of claim 1, And the multimedia content is selected by information set in at least one of the calling terminal, the called terminal, and the media server. In the method for providing customized multimedia content to the called terminal on the early session, Receiving a call connection related signal including first session description information for a call connection with a calling terminal from the called terminal; Receiving second session description information for providing the multimedia content from a media server; Transmitting a call connection related signal including the first session description information to the calling terminal; Receiving a response signal for the call connection related signal from the originating terminal; Transmitting the second session description information to the called terminal by including the response signal in the response signal; A method for providing customized multimedia content on an early session comprising a. The method of claim 6, Transmitting, by the media server, the multimedia content to the called terminal by using the second session description information. The method of claim 1, further comprising the customized multimedia content on the early session. The method of claim 6, The port and media information included in the first session description information are different from the port and media information included in the second session description information. The method of claim 6, The call connection related signal includes function information of the called terminal, The function information of the called terminal includes whether the called terminal can simultaneously provide a session for call connection and a session for the multimedia content. The method of claim 6, And the multimedia content is selected by information set in at least one of the calling terminal, the called terminal, and the media server. In the system for providing customized multimedia content on the early session to the calling terminal, Receive a call connection-related signal for a call connection with the called terminal from the originating terminal, receives a response signal containing the first session description information for the call connection from the called terminal, the first session to the response signal A first server including description information and second session description information and transmitting to the calling terminal; A media server transmitting the second session description information to the first server, And the second session description information is for provision of the multimedia content. In the system for providing customized multimedia content to the called terminal on the early session, Receive a call connection-related signal including the first session description information for call connection with the calling terminal from the called terminal, transmits the call connection-related signal to the calling terminal, the call connection-related signal from the calling terminal A first server for receiving a response signal for transmitting and including the second session description information in the response signal and transmitting the same to the called terminal; A media server transmitting the second session description information to the first server, And the second session description information is for provision of the multimedia content. In the method for providing customized multimedia content on the early session to the calling terminal, Receiving a call connection related signal for call connection with a called terminal from the calling terminal; Receiving a response signal including first session description information for call connection from the called terminal to form a first dialog; Receiving second session description information for providing the multimedia content from a media server; Transmitting the second session description information to the calling terminal to form a second dialog; Instructing the media server to transmit the multimedia content customized for each subscriber to the calling terminal; Transmitting the first session description information to the calling terminal by including the first session description information in the first dialog; A method for providing customized multimedia content on an early session comprising a. The method of claim 13, And transmitting, by the media server, the multimedia content to the calling terminal according to the command. The transmitting of the multimedia content is performed in parallel with the transmitting of the first session description information. The method of claim 13, The call connection related signal includes function information of the calling terminal, And the function information of the originating terminal comprises whether the originating terminal can provide more than one dialog. In the method for providing multimedia content to the called terminal, Receiving a call connection related signal for call connection with the called terminal from an originating terminal; Receiving a response signal including first session description information for call connection from the called terminal to form a first dialog; Receiving second session description information for providing the multimedia content from a media server; Transmitting the second session description information to the called terminal to form a second dialog; Instructing the media server to transmit the multimedia content customized for each subscriber to the called terminal; Transmitting the first session description information to the calling terminal by including the first session description information in the first dialog; A method for providing customized multimedia content on an early session comprising a. The method of claim 16, And transmitting, by the media server, the multimedia content to the called terminal according to the command. The transmitting of the multimedia content is performed in parallel with the transmitting of the first session description information. The method of claim 16, The response signal includes the function information of the called terminal, And the functional information of the called terminal includes whether the called terminal can provide two or more dialogs. In the system for providing customized multimedia content on the early session to the calling terminal, Receiving a call connection-related signal for call connection with the called terminal from the calling terminal, receiving a response signal including first session description information for call connecting from the called terminal, and forming a first dialog; A first server transmitting second session description information for providing the multimedia content to a terminal to form a second dialog, and including the first session description information in the first dialog to transmit to the calling terminal; The media server transmits the second session description information to the first server, and transmits the multimedia content customized for each subscriber to the calling terminal by receiving the command of the first server. The multimedia content providing system customized on the early session, including. In the system for providing customized multimedia content to the called terminal on the early session, Receiving a call connection-related signal for call connection with the called terminal from the calling terminal, receiving a response signal including first session description information for call connection from the called terminal, and forming a first dialog; A first server transmitting second session description information for providing the multimedia content to a terminal to form a second dialog, and including the first session description information in the first dialog to transmit to the calling terminal; The media server transmits the second session description information to the first server, and transmits the multimedia content customized for each subscriber to the called terminal by receiving the command of the first server. The multimedia content providing system customized on the early session, including.

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