KR20040019201A - Videophone ringing service system and method - Google Patents

Abstract

The present invention relates to a new data service of the IMT-2000 system, and more particularly, when a video call is attempted using a video, a video provided by the called party is displayed on the screen of the caller until the call is connected. The present invention relates to a video providing system and a method of waiting for a telephone call.

The video providing system of the present invention allocates and assigns a multimedia resource to be used for an IMT-2000 data service, a CSCF which is a kind of exchanger for routing and forwarding SIP, a calling videophone and a calling videophone supporting a video / audio format. MRF with management function to release, AS to perform necessary call connection between calling video caller and calling videophone, and to instruct to provide and stop video, subscriber information and location information are stored and CSCF as needed. And an HLR for providing information to the AS.

Description

Video providing system and method for video call waiting in call {Videophone ringing service system and method}

The present invention relates to a new data service of the IMT-2000 system, and more particularly, when a video call is attempted using a video call, the call waiting of the video caller displaying a video on the caller's video call screen until the call is connected. The present invention relates to a video providing system and a method thereof.

IMT-2000 is a next-generation mobile communication terminal adopting the standard technology proposed by ITU-T study group 11. It is a communication service using satellite.

The feature of IMT-2000 is that it can be provided with voice call, telex, wireless call, and e-mail from anywhere in the world.

Currently, mobile communication services such as cellular phones and PCS, which are mainly voice services, are gradually developing into IMT-2000 services that support multimedia personal communication such as high speed data, packet, and video.

The data service of the IMT-2000 basically operates based on a Session Initiation Protocol (SIP).

The SIP is an application protocol for signaling of VoIP and other application services.

On the other hand, when making a phone call to a video call with a video phone, the call waiting for a call connection while watching the screen of the video phone, unlike a typical voice call.

The call connection takes a lot of waiting time such as the time that the called party answers through the call connection signaling.

That is, when the caller presses the called party's phone number and the outgoing button, this signal is passed through the base station to the exchange, and the exchange checks the caller's location and information and the called party's location and information, which takes about 3-5 seconds. It takes

The next exchange will set up a line through the base station to make the call and ring the called party's connection confirmation, which takes about 5-10 seconds.

Thus, after the caller presses the called party's phone number, it takes several steps and several seconds (more than 8 seconds) to make a call with the called party. During that time, the caller is on standby.

When the ringer rings, the receiver presses the receive button or picks up the receiver.

However, there is a problem in the screen of the conventional video telephone that the company logo of the video telephone manufacturer or the video telephone service provider is tediously outputted when it is in the standby state of call connection.

The present invention has been made to solve the above-mentioned problems, an object of the present invention is to effectively output the video on the caller's video phone screen while waiting for the call connection of the video phone to reduce the boredom to the caller while the caller The present invention provides a video providing system and method for waiting for a call of a video telephone to display a video expressing the personality of the called party.

In order to achieve the above object, the present invention provides a caller video telephone and a caller video telephone that support a video / audio format of a video, and a switch for routing and forwarding a connection establishment protocol (SIP). After analyzing the number and checking whether the called party is a subscriber, if it is a subscriber, it is a CSCF that delivers SIP INVITE message, and a media server that allocates / releases multimedia resources to be used for IMT-2000 data service. And an AS for performing a call connection between the calling videophone and the called videophone, and instructing the MRF to provide and stop the video, and the subscriber information and the location information are stored to store the CSCF and AS as necessary. To provide a video providing system during call waiting of a video phone including an HLR providing information to do.

In order to achieve the above object, the present invention, by pressing the called party's telephone number in the above-mentioned system to send a SIP INVITE message to the CSCF in the caller's video telephone, by analyzing the called party's telephone number in the CSCF Confirming that the called party is a subscriber, forwarding an INVITE message to an AS when the subscriber is confirmed, transmitting an INVITE message to an MRF through a CSCF, and sending an INVITE message to an MRF through an CSCF, and confirming an OK message for the INVITE message through a CSCF. Transmitting the 200 INVITE message to the AS, including the MRF address and port information in the 183 call progress message and transmitting the message to the caller's video telephone via the CSCF, and a PRACK message between the calling video telephone and the AS and the OK thereof. Confirming successful delivery of the message by exchanging a 200 PRACK message, which is a message; Transmitting an ACK message to the MRF via CSCF to instruct the transmission of the video, and transmitting the video provided by the called party to the calling videophone according to the ACK message in the MRF, and receiving the videophone through the INVITE message via the CSCF at the AS. Performing signaling for a conventional SIP video call, transmitting a 200 INVITE message, which is an OK message for the INVITE message, to the AS via a CSCF to the AS, and from the AS to the calling videophone Sending an ACK message to the MRF, stopping the transmission of the video to the MRF through the BYE message through the CSCF, and stopping the video transmission according to the BYE message from the MRF to stop the output of the video on the screen of the caller's video telephone. Providing a video providing method when waiting for a call of a video telephone, characterized in that consisting of The party.

1 is a block diagram of a system for providing a video call waiting according to the present invention.

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

<Description of Symbols for Main Parts of Drawings>

10: caller video phone 12: CSCF (Call Signal Call Function)

14: Application Server

16: MRF (Multimedia Resource Function)

16a: Video DB

18: HLR (Home Location Register) 20: Recipient Video Phone

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

First, SIP will be described to help understand the present invention. In the 3rd Generation Partnership Project (3GPP), an external push management server delivers data to a called terminal after paging through a network node and establishing a session.

SIP (Session Initiation Protocol), which can be combined with WCDMA (Wideband CDMA) network to add flexibility to data transfer, is a very simplified text-based application layer control protocol.It is a simple call compared to the multimedia information processing procedure using H.323. Process to perform functions.

In addition, by specifying media information through SDP (Session Description Protocol) and providing capability information of the corresponding terminal, various services such as teleconference, instant messaging, and push service can be flexibly implemented.

The present invention provides a video service when waiting for connection of a video phone through the SIP and WCDMA (IMT-2000) network.

1 is a block diagram of a system for providing a video call waiting according to the present invention.

As shown, the CSCF (12, Call Signal Call), which is a kind of exchanger for routing and forwarding SIP, with the calling videophone 10 and the called videophone 20 supporting the video / audio format. Function), a MRF (16, Multimedia Resource Function) of a management function for allocating / releasing a multimedia resource to be used for the IMT-2000 data service, and a call between the caller video phone 10 and the caller video phone 20. ) AS (14, Application Server) that performs the procedure necessary for connection and instructs the provision and stop of the video, and the HLR that stores the subscriber information and location information and provides the information to CSCF (12) and AS (14) as needed. (18, Home Location Register).

The CSCF 12 for routing and forwarding the SIP analyzes the telephone number of the called videophone 20 using the information stored in the HLR 18 and checks whether the called party is a subscriber to the video providing system according to the present invention. Deliver the SIP INVITE message to the AS 14.

In the MRF 16, which is a kind of media server that manages various multimedia resources to be used in the IMT-2000 data service, video information provided by the called party is stored in the video DB 16a and according to an ACK message sent from the AS 14. The video phone 10 outputs a video (video + audio, video only, audio only) on the screen.

The HLR 18 stores subscriber's personal information, subscription service type, terminal type, telephone number, location information, and the like, and provides information required for the CSCF 12 and the AS 14.

The called party subscribes to the video providing system according to the present invention and provides the MRF with video information to be output to the other party's video telephone (caller's video telephone) when the call comes to the user, according to the caller's telephone number or time. Specifies that is output differently.

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

In the figure, 200 INVITE means OK for the INVITE message, [n] means SIP Dialog ID, and 200 PRACK means OK for the PRACK message.

First, when the caller (UAC: User Agent Client) lifts the handset and presses the called party's telephone number using the caller videophone 10, the caller videophone 10 transmits the SIP INVITE message to the CSCF 12 (200).

In this case, the SIP INVITE message includes a caller SDP (UAC SDP), which contains video / audio format information, address, and port information supported by the caller video telephone 10.

The CSCF 12 analyzes the telephone number of the called user agent (UAS) videophone 20 using the information provided by the HLR 18 to determine whether the called party is a subscriber to the service according to the present invention. If the subscriber is confirmed, the AS 14 forwards the INVITE message (forwarding) (202).

The AS 14 uses the information provided by the HLR to send the INVITE message containing the caller's phone number, the video information specified by the called party according to the time zone, and the video / audio format, the address, and the port information of the caller's video phone, through the CSCF 12. Forward to MRF 16 (204, 206).

The MRF 16 informs the AS 14 of the 200 INVITE message, which is a 200 OK message for the INVITE message via the CSCF 12, to notify the successful reception of the message (208, 210).

In this case, the 200 INVITE message includes an MRF SDF. The MRF SDF includes address and port information of the MRF 16 to be used to control the quality of a video (video / audio) received by the caller's commercial phone 10. .

The AS 14 includes the address and port information of the MRF in the 183 call progress message and transmits it to the caller video telephone 10 through the CSCF 10 (212, 214).

Then, the successful transmission of the message is confirmed between the calling videophone 10 and the AS 14 through the exchange of the PRACK message and the 200 PRACK message through the CSCF 12 (216, 218, 220, 222).

The AS 14 sends an ACK message to the MRF 16 via the CSCF 12 to instruct the transmission of the video (224, 226), and the MRF 16 provides the called party to the calling videophone 10 according to the ACK message. The video is transmitted (227).

At this time, a different video is output according to the caller's phone number or time zone specified by the called party, and from this point on, the caller can view the video provided by the called party through the screen of the video phone 10.

The AS 14 sends a call to the called videophone via the CSCF 12 via the INVITE message (228, 230), attempting signaling for a typical (standard) SIP video call and waiting for the called party to answer. While the caller continues to watch the video.

When the called party responds, the AS 14 receives the 200 INVITE message, which is an OK message for the INVITE message, from the called party videophone 20 through the CSCF 12 (232, 234).

The AS 14 sends an ACK message to the calling videophone 10 via the CSCF 12 (236,238), and then instructs the MRF 16 to stop the video transmission through the BYE message via the CSCF 12. (240,242).

In this way, the output of the video is stopped on the screen of the caller video phone 10, and by sending an ACK message to the called videophone 10 via the CSCF 12 from the AS 14 (244, 246), the caller video phone 10 ) And a video call by connecting a call between the caller video phone 20 (248).

As described above, according to the present invention, by effectively outputting a video on the caller's video phone screen while waiting for a call connection of the video phone, the caller to reduce the boredom while waiting and the caller to the video expressing the personality of the called party I can display it.

Claims (6)

Caller video phone and caller video phone that supports video / audio format of video, A switch that routes and forwards a connection establishment protocol (SIP), and analyzes the telephone number of the called party's videophone to check whether the called party is a subscriber, and if so, delivers a SIP INVITE message. )Wow, A media server for allocating / releasing multimedia resources to be used for an IMT-2000 data service, comprising: a multimedia resource function (MRF) for providing a video to the caller's video telephone; An application server (AS) that performs a procedure required for a call connection between the calling videophone and the called videophone and instructs the MRF to provide and stop the video; A video providing system during call waiting of a video telephone including an HLR which stores subscriber information and location information and provides information to the CSCF and AS as necessary. The method of claim 1, wherein the video information provided by the called party is stored in the MRF, when the caller is connected to the caller's phone number through the caller's video phone, different video information according to the caller's phone number and time zone is Video providing system during call waiting of a video telephone, characterized in that provided to the video telephone. In the video providing method of the system consisting of a caller and a receiver video telephone, a CSCF serving as a switch, an MRF of a media server, and an AS that performs a procedure required for call connection between the caller and the receiver video telephone, Transmitting the SIP INVITE message from the caller's videophone to the CSCF by pressing the called party's phone number using the caller's videophone (S1), Analyzing the phone number of the called party in the CSCF to confirm whether the called party is a subscriber, and if confirmed as a subscriber, forwarding an INVITE message to the AS (S2), Transmitting the INVITE message to the MRF through the CSCF in the AS (S3), Transmitting a 200 INVITE message, which is an OK message for the INVITE message, to the AS through the CSCF at step S4; In step S5, including the address and port information of the MRF in the AS in the 183 call progress message and transmitting it to the caller's video telephone through the CSCF, Confirming successful delivery of the message by exchanging a PRACK message and the 200 PRACK message which is the OK message between the calling videophone and the AS (S6), Transmitting an ACK message to the MRF through the CSCF to instruct the transmission of the video, and transmitting the video provided by the called party to the calling videophone according to the ACK message in the MRF (S7); Performing signaling for a typical SIP video call by transmitting to the called party videophone via an INVITE message through the CSCF at the AS (S8), Transmitting a 200 INVITE message, which is an OK message for the INVITE message, from the called party's video telephone to the AS via CSCF (S9); Sending an ACK message to the caller video phone via the CSCF in the AS, while transmitting the interruption of the video transmission to the MRF via the CSCF through the BYE message (S10), In step (S11) to stop the transmission of the video according to the BYE message in the MRF output of the video on the screen of the caller video phone, Method of providing a video during call waiting of the video telephone, characterized in that configured. 4. The method of claim 3, wherein the SIP INVITE message of step S1 includes a caller session description protocol (SDP) including a video / audio format, address, and port information supported by the caller's video telephone. How to provide a video during the call waiting video call. The video telephone apparatus according to claim 3, wherein the INVITE message of step S3 includes video information designated by the called party according to the caller's telephone number and time zone, video / audio format designated by the caller's video telephone, address, and port information. How to provide video on call waiting. 4. The video providing method of claim 3, wherein the 200 INVITE message in step S4 includes an address and port information of an MRF to be used for controlling the quality of video / audio received by the caller's videophone. Way.