KR20040105517A - Method and System for Providing Ring Back Tone Service in Packet Communication Network - Google Patents

Abstract

PURPOSE: A method and a system for supplying a call waiting tone service in a packet network are provided to deliver preset call waiting tone data or call waiting multimedia data to an originating-side mobile communication terminal when a receiving subscriber makes a call, thereby realizing a higher value added. CONSTITUTION: An originating mobile communication terminal attempts a call connection(S300). A gatekeeper converts MINs(Mobile Identification Numbers) of the originating-side terminal and a receiving-side terminal into IP addresses(S302), and decides whether the receiving terminal is registered in a call waiting tone service(S304). If so, the gatekeeper attempts a call connection to a CRBT(Coloring Ring Back Tone) server(S306). The CRBT server transmits a sound source of call waiting tone data to a media gateway(S308). The media gateway converts the sound source into waiting tone packet data to transmit the converted data(S310). The originating-side terminal delivers the packet data to a speaker(S312). A microprocessor of the receiving-side terminal decides whether data related to a call connection is inputted(S314). If so, the microprocessor transmits a call connection response message to the gatekeeper(S316). If the gatekeeper transmits a CRBT connection complete message, the CRBT server stops transmitting the sound source(S318).

Description

Method and system for providing call waiting sound in packet network {Method and System for Providing Ring Back Tone Service in Packet Communication Network}

The present invention relates to a method and a system for providing a call waiting sound in a packet network. More specifically, when the calling subscriber calls the called subscriber through the packet network, call waiting sound data preset in the Color Ring Back Tone (CRBT) server provided by the existing circuit network or the multimedia CRBT server newly implemented in the packet network or The present invention relates to a method and a system for providing a call waiting sound in a packet network for transmitting call waiting multimedia data to a calling mobile communication terminal.

As computer, electronic, and communication technologies have made rapid progress, various wireless communication services using wireless networks have been provided. The most basic wireless communication service is a wireless voice call service that provides a voice call to a mobile terminal user wirelessly, which can provide a service regardless of time and place. In recent years, a wireless Internet service has been introduced to provide an Internet communication service to a user of a mobile communication terminal through a wireless communication network.

Accordingly, the subscribers of the mobile communication service can freely move and talk with the other party anytime and anywhere using the wireless communication service, and also provide various information necessary for life through the wireless Internet service, such as news, weather, sports, securities, Exchange rates or traffic information may be provided in various forms such as text, voice, or image.

On the other hand, a ring back tone (RBT) service or a so-called coloring RBT (CRBT), which allows a caller to hear various sounds designated by the called party of the mobile communication terminal from the other party's mobile terminal or a general telephone. The service is in the spotlight. The call waiting sound service provides the caller with a call waiting sound designated by the called party. The call waiting sound may be a mechanical call waiting sound generated during an existing call, for example, the latest song or pop song, as well as the latest song or pop sound, instead of the "following" sound. In addition, it is a service that allows you to use your own voice, which you have recorded beforehand, as a call waiting sound.

As the coloring call waiting sound service is provided, the counterpart may listen to the sound of a sound source designated by the called party, instead of listening to the uniform and mechanical call waiting sound, so as to make the auditory satisfaction.

Meanwhile, the bandwidth of the wireless section is expanding with the introduction of CDMA2000 1xEV-DO, WCDMA, and Wireless LAN, and the existing circuit-based call service is evolving into a packet-based data communication service. In this process, it is possible to provide packet-based mobile video telephony services and Voice of Internet Protocol (VoIP) services. However, since the call waiting sound provided by the existing line-based mobile phone service is only a simple voice and sound, a subscriber using a mobile video call or VoIP service requires a service that provides an image or video when a call is waiting. . In addition, in the existing line-based mobile phone service, there is a problem in that a separate voice channel capacity must be allocated by the mobile exchange in order for the call waiting sound source to be reproduced in the terminal.

In order to solve the above problems, the present invention, when the calling subscriber calls the called subscriber through the packet network, is set in advance in the CRBT (Color Ring Back Tone) server provided in the existing circuit network or the multimedia CRBT server implemented in the packet network It is an object of the present invention to provide a method and system for providing a call waiting sound service in a packet network in which call waiting sound data or call waiting multimedia data is transmitted to an originating mobile communication terminal.

1 is a block diagram showing a call waiting service system in a packet network according to a first embodiment of the present invention;

2 is a block diagram briefly illustrating an internal configuration of a mobile communication terminal according to an embodiment of the present invention;

3 is a flowchart illustrating a process of providing a call waiting sound service according to a first embodiment of the present invention;

4 is a block diagram showing a call waiting service system in a packet network according to a second embodiment of the present invention;

5 is a flowchart illustrating a process of providing a call waiting sound service according to a second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: incoming mobile communication terminal 102: outgoing mobile communication terminal

104: wireless base station 105: base station transmitter

106: base station controller 108: PDSN

110, 400: Gatekeeper 112: Media Gateway Controller

114, 404: SIP Server 116: Media Gateway

118: Signal Gateway 120: CRBT Server

122: subscriber DB 124: sound source DB

202: program memory unit 204: parameter storage unit

206: key input unit 208: LCD display unit

210: data storage 212: mode state storage

220: microprocessor 230: digital signal processing unit

240: baseband converter 250: RF signal processor

260: speaker 270: microphone

280: RF antenna 402: multimedia CRBT server

406: Multimedia DB

According to a first object of the present invention, when a calling party calls a called party through a packet network, a call waiting tone service method is provided so that call waiting tone data which is set in advance by a called party to a CRBT (Coloring Ring Back Tone) server is sent out. (a) an originating mobile communication terminal attempting to connect a call to an incoming mobile communication terminal through the packet network; (b) converting a Mobile Identification Number (MIN) of the called mobile communication terminal and a MIN of the calling mobile communication terminal into an IP address, and determining whether the called mobile communication terminal has subscribed to the call waiting tone service; (c) attempting a call connection to the CRBT server when the called mobile communication terminal is subscribed to the call waiting tone service as a result of the determination of step (b); (d) the sound source of the call waiting sound data set by the called subscriber is transmitted from the CRBT server to the media gateway, and the sound source of the call waiting sound data is converted into the standby sound packet data by the media gateway and transmitted to the calling mobile communication terminal. Becoming; And (e) the originating mobile communication terminal transmitting the standby sound packet data to a speaker while stopping a call connection response message from the terminating mobile communication terminal when a call connection is made. The present invention provides a method for providing a call waiting sound service in a packet network.

According to a second object of the present invention, when a calling party calls a called party through a packet network, a call waiting sound service is provided so that the call waiting multimedia data which is set in advance by the called subscriber is sent to a multimedia coloring ring back tone (CRBT) server. A method comprising: (a) an originating mobile communication terminal attempting to connect a call to an incoming mobile communication terminal through the packet network; (b) converting a Mobile Identification Number (MIN) of the called mobile communication terminal and a MIN of the calling mobile communication terminal into an IP address, and determining whether the called mobile communication terminal has subscribed to the call waiting tone service; (c) attempting a call connection to the multimedia CRBT server when the called mobile communication terminal is subscribed to the call waiting tone service as a result of the determination of step (b); (d) transmitting, by the multimedia CRBT server, the call waiting multimedia data to the calling mobile communication terminal; And (e) the outgoing mobile communication terminal transmitting while receiving the call waiting multimedia data, when the call connection is made, the call connection response message is transmitted from the incoming mobile communication terminal and the transmission is interrupted. The present invention provides a method for providing a call waiting sound service for transmitting call waiting multimedia data in a packet network.

According to a third object of the present invention, when a calling party calls a called party through a packet network, a call waiting tone service system for reproducing call waiting tone data preset by a called party to a coloring ring back tone (CRBT) server is provided. An incoming mobile communication terminal applying for the call waiting tone service and selecting the call waiting tone data to be used for the call waiting tone service; An outgoing mobile communication terminal that receives and reproduces the call waiting sound data through the packet network; A wireless base station providing a data packet service to the calling mobile communication terminal and the called mobile communication terminal and transmitting and receiving the call waiting sound data; Receives a call setup message from the calling mobile terminal and performs a call connection with the called mobile terminal, and MIN (Mobile Identification Number) of the called mobile terminal and the MIN of the calling terminal. An exchange that translates to an address; A CRBT server providing the call waiting sound service to the calling mobile communication terminal and transmitting a sound source of the call waiting sound data selected by the called mobile communication terminal through the packet network; A media gateway receiving the sound source of the call waiting sound data and converting the call waiting sound data into atmospheric packet data for transmission by the calling mobile communication terminal; And a media gateway controller configured to receive a call connection message from the exchange and perform a call connection with the CRBT server.

According to a fourth object of the present invention, a call waiting service for transmitting a call waiting multimedia data preset by a called subscriber to a multimedia coloring ring back tone (CRBT) server when the calling subscriber calls the called subscriber through a packet network. A provision system comprising: an incoming mobile communication terminal for applying for the call waiting tone service and selecting the call waiting multimedia data to be used for the call waiting tone service; An outgoing mobile communication terminal which receives and reproduces the call waiting multimedia data through the packet network; A wireless base station providing a data packet service to the calling mobile communication terminal and the called mobile communication terminal and transmitting and receiving the call waiting multimedia data; Receives a Call Setup message from the calling mobile terminal, performs a call connection with the called mobile terminal, and MIN (Mobile Identification Number) of the called mobile terminal and the MIN of the calling mobile terminal. An exchange that translates to an address; And a multimedia CRBT server providing the call waiting sound service to the calling mobile communication terminal and transmitting the call waiting multimedia data selected by the called mobile communication terminal through the packet network. The present invention provides a system for providing a call waiting sound service for transmitting multimedia data.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram showing a call waiting service system in a packet network according to a first embodiment of the present invention.

In the packet waiting system according to the first preferred embodiment of the present invention, the call waiting sound service system includes incoming and outgoing mobile communication terminals 100 and 102, a base station (BS) 104, exchanges 110 and 114, and media. Gateway Controller (MGC: Media Gateway Controller) 112, Media Gateway (MG: Media Gateway) 116, Signal Gateway (SG: Signal Gateway) 118, CRBT (Coloring Ring Back Tone) Server 120, Subscriber Database 122, sound source database 124, and the like.

The call waiting service in the packet network according to the technical concept of the present invention requests a call from the originating mobile communication terminal 102 to the destination mobile communication terminal 100, whereby a call between the calling mobile communication terminal and the called mobile communication terminal is made. It refers to a service to which a specific call waiting sound, which is selected and registered in advance by a user of the incoming mobile communication terminal 100, is transmitted during the previous period. Packet network according to the technical idea of the present invention is based on CDMA-2000 1xEV-DO, W-CDMA, Wireless LAN.

The mobile communication terminals 100 and 102 according to the preferred embodiment of the present invention are terminals capable of performing a voice call and a video call with each other through a mobile communication network and performing data communication through a wireless Internet connection. In addition, the mobile communication terminal 100 and 102 according to the preferred embodiment of the present invention is capable of transmitting and receiving voice packets and / or data packets, and having a unique IP (Internet Protocol) address or a video terminal. to be. That is, the mobile communication terminals 100 and 102, which are end points for performing voice, video, or data communication, perform voice calls, video calls, and data transmission / reception functions using unique IP addresses.

On the other hand, the mobile communication terminals 100 and 102 according to the preferred embodiment of the present invention support the H.323 regulations defined for transmitting and receiving packet data. H.323 is an International Telecommunication Union-Telecommunication Standardization (ITU-T) standard for transmitting and receiving voice and video data over packet-switched networks such as Transmission Control Protocol / Internet Protocol (TCP / IP) and User Datagram Protocol (UDP) in 1996. As a standard adopted by Sector, VoIP is a representative technology for transmitting and receiving packet data using H.323. H.323 protocol stack uses H.225 as a protocol for interconnection between devices, H.245 as a protocol for call control, and transmits audio and video. Compression codec and the like.

Accordingly, the mobile communication terminals 100 and 102 according to the preferred embodiment of the present invention also use H.245 for call control, H.245 for call setup and call signaling, audio codec and video codec. Support. An internal configuration of the mobile communication terminals 100 and 102 according to the preferred embodiment of the present invention will be described in more detail with reference to FIG. 2.

The incoming mobile communication terminal 100 applies for a call waiting service through an agent or an affiliated store of a mobile communication service provider or by using a wired or wireless Internet service, and selects specific call waiting data from various call waiting sounds. Information of a specific call waiting tone selected by the terminating mobile communication terminal 100 (for example, a data name, a route, and a registrant's telephone number) is stored in a subscriber database (not shown) linked with the CRBT server 120.

In the above description, although the mobile communication terminals 100 and 102 are separately illustrated and described as incoming and outgoing mobile communication terminals, the outgoing mobile communication terminal 102 and the incoming mobile communication terminal 100 use a packet network to make a call waiting sound service. It should be noted that the incoming and outgoing mobile communication terminal 100 and the outgoing mobile communication terminal 102 may be changed as the role of requesting a voice call and a video call is changed.

On the other hand, the mobile communication terminal 100 and 102 according to an embodiment of the present invention is a PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA ( Wideband CDMA) phones, CDMA-2000 phones, and Mobile Broadband System (MBS) phones.

The wireless base station 104 basically provides a packet voice call service, a packet video call service, and a packet data communication service to the incoming and outgoing mobile communication terminals 100 and 102, and the base transceiver station (BTS) 105 And a base station controller (BSC) 106.

The base station transmitter 105 transmits and receives voice, video and data signals between the incoming and outgoing mobile communication terminals 100 and 102 by identifying the locations of a plurality of mobile communication terminals including the incoming and outgoing mobile communication terminals 100 and 102. It performs the function. The base station transmitter 105 receives a call attempt from the originating mobile communication terminal 102 to the destination mobile communication terminal 100 through a traffic channel of the signal channel, and transmits the received call attempt to the originating base station controller 106. To send.

The base station controller 106 controls the base station transmitter 105 and performs various call processing functions such as support for incoming and outgoing call processing and message processing of the base station transmitter 105. The base station controller 106 forwards the call request received through the base station transmitter 105 to the gate keeper (GK) 110 through the packet data switching node (PDSN) 108.

The gatekeeper 110 is a kind of exchange having a key function required for smoothly transmitting and receiving voice packets, image packets, and data packets between the incoming and outgoing mobile communication terminals 100 and 102 in the packet network according to the preferred embodiment of the present invention. to be. The gatekeeper 110 is responsible for address translation, access control, bandwidth control, call control, call authentication, and the like for incoming and outgoing mobile communication terminals 100 and 102 using H.323. Functions like call management.

Here, address translation refers to an operation of converting a MIN (Mobile Identification Number) of the incoming mobile communication terminal 100 transmitted from the outgoing mobile communication terminal 102 and the MIN of the outgoing communication terminal 102 into an IP address. That is, the transmission and reception of packet data according to a preferred embodiment of the present invention is basically based on an IP address. For example, if the MIN of the incoming mobile terminal 100 is 011-1234-5678, the gatekeeper 110 converts the received MIN into an IP address such as 204.252.32.456. For this address translation function, the gatekeeper 110 has a built-in address translation table consisting of the MIN of the registered mobile communication terminal and the IP address corresponding to each MIN.

The gatekeeper 110 also supports H.225, a protocol for interconnection between multiple mobile communication terminals, including incoming and outgoing mobile communication terminals 100 and 102. H.225 defines the messages exchanged between the mobile communication terminal and the gatekeeper 140, messages for call signals, and real-time data transmission. The gatekeeper 110 performs a function related to registration, authorization, and status of the incoming and outgoing mobile communication terminals 100 and 102 by using a Registration Admission Status (RAS) message defined in H.225.

In addition, the gatekeeper 110 receives a call connection message from the originating mobile communication terminal 102 in which the registration and authorization process is normally performed, and uses a protocol called Q.931 for call connection with the incoming mobile communication terminal 100. .

Incoming and outgoing mobile communication terminals 100 and 102, which are connected by the gatekeeper 110, transmit and receive packet data of voice and video using Real Time Transport Protocol (RTP) / Real Time Control Protocol (RTCP). . RTP is a protocol for transmitting a compressed packet frame. UDP transmits a packet frame using UDP. The RTCP transmits information on received packet frames (statistics on the number of received frames, etc.) to the sender to acquire information on the quality of the frame transmitted by the sender.

In addition, the incoming and outgoing mobile communication terminals 100 and 102 connected through the gatekeeper 110 are G.711 as the PCM audio codec defined in H.323, G.726 as the ADPCM audio codec, and G as the CELP audio codec. Audio packets are transmitted and received using protocols such as .728 and G729, and image packets are transmitted and received using protocols such as H.261 and H.263.

In addition, the gatekeeper 110 determines whether the incoming mobile communication terminal 100 is a user subscribed to the call waiting service of the present invention. To this end, the gatekeeper 110 stores profile information of a mobile communication terminal registered with the gatekeeper 110. Here, the profile information includes the MIN, the electric serial number (ESN) of the mobile communication terminal registered in the gatekeeper 110, and the registered additional service information. If it is determined that the terminating mobile communication terminal 100 is a terminal subscribed to a call waiting sound service, the gatekeeper 110 sets up a call including the IP address of the terminating mobile communication terminal 100 and the MIN of the terminating mobile communication terminal 100. The request signal is transmitted to the media gateway controller 112 and the signal gateway 118.

The media gateway controller 112 receives a call connection message from the gatekeeper 110 and performs a call connection with the CRBT server 120. The signal gateway 118 CRBT receives the messages received from the gatekeeper 110. This function converts the signal and transmits it to the server for reception. At this time, message conversion uses ISUP protocol recommended by ITU-T.

The CRBT server 120 functions to provide a call waiting tone service to the incoming and outgoing mobile communication terminals 100 and 102 according to the first embodiment of the present invention. The CRBT server 120 provides the incoming mobile communication terminal 100 with a website screen constructed in WML (Wireless Markup Language) including a call waiting sound selection function, and the call waiting sound selected by the user of the incoming mobile communication terminal 100. A sound source of data is transmitted to the media gateway 116 via the packet network according to the first preferred embodiment of the present invention.

In addition, the CRBT server 120 also operates a website built in a web language such as HTML (HyperText Markup Language) so that the called party can use a call waiting service using a predetermined computer (not shown). Therefore, the called party can access the website of the CRBT server 120 through the Internet using a computer to apply for and set up a call waiting service.

In addition, the CRBT server 120 interworks with the subscriber database 122 and the sound source database 124 to provide the set call waiting sound to the calling mobile communication terminal 102.

The subscriber database 122 stores personal information (name, social security number, gender, address, etc.) of the subscribers subscribed to the call waiting service according to the preferred embodiment of the present invention, information on the MIN of the mobile communication terminal, subscribed additional services, and the like. It is. Accordingly, the CRBT server 120 obtains the information (data name, path, etc.) of the standby sound data set by the terminating mobile communication terminal 100 by using the MIN stored in the subscriber database 122 and the additional service information subscribed to.

The sound source database 124 stores call waiting sound data in various formats provided by the CRBT server 120 according to the first embodiment of the present invention. Call waiting sound data stored in the sound source database 124 may be classified and stored by type. Accordingly, the CRBT server 120, which has obtained information on the name and path of call waiting sound data to be transmitted to the calling mobile terminal 102 through the subscriber database 122, searches the sound source database 124 to make a corresponding call. Read and transmit atmospheric sound data.

Meanwhile, since the CRBT server 120 according to the first embodiment of the present invention has a configuration similar to the coloring server used when providing a coloring service in an existing circuit network, in the first embodiment of the present invention, coloring in an existing circuit network is performed. You can also use a server.

The media gateway 116 receives the sound source of the call waiting sound and converts the sound to packet data for transmission so that the calling mobile terminal 102 can receive the sound. The media gateway 116 stops the transmission of the standby sound packet data when the call of the calling mobile communication terminal 102 and the incoming mobile communication terminal 100 is connected.

In the call waiting sound service according to the first preferred embodiment of the present invention, the waiting sound packet data transmitted from the media gateway 116 is transmitted using a streaming technique. The streaming technique is a technique for reproducing voice files and video files in real time on the Internet. In the conventional file reproducing method, the file is first downloaded to the hard disk and then played back. Therefore, in the streaming method, when a part of the file transmitted to the receiving side is transmitted, the first part is transmitted. Receive and play the rest while playing. In addition, in a streaming scheme, a file transmitted from a transmitting side to a receiving side is not stored at the receiving side, and is deleted immediately whenever a part of reproduction is finished. Accordingly, the media gateway 116 divides the atmospheric sound packet data to be transmitted into packet frames, codes them in a stream format, and transmits them to the outgoing mobile communication terminal 102 through the packet network. Therefore, the outgoing mobile communication terminal 102 should be equipped with a streaming program for transmitting the streaming waiting sound packet data directly to the speaker.

Meanwhile, although only the method of using the H.323 protocol as a signaling method for implementing a call waiting sound service according to a preferred embodiment of the present invention has been described, the technical idea of the present invention is not limited thereto. Session Initiation Protocol) can be used to provide call waiting service. SIP is a signaling method proposed by the Internet Engineering Task Force (IETF), which is easier to parse and compile, and is more scalable and text-based, making it easier to implement than H.323. It has the advantage of being easy. SIP is modeled on the basis of Simple Mail Transfer Protocol (SMTP), E-mail, HyperText Transfer Protocol (HTTP), and the Web. In addition, SIP may be referred to as a client-server protocol in which a server sends a response signal when a terminal, which is a client, sends a request signal.

When the call waiting sound service system according to the preferred embodiment of the present invention is configured using the SIP protocol, the switch serving as the gatekeeper 110 becomes the SIP server 114. Of course, the incoming and outgoing mobile communication terminals 100 and 102 should also be provided with the ability to use the service through the SIP protocol. Since the implementation of the service using the SIP protocol is well known to those skilled in the art, a detailed description thereof will be omitted.

2 is a block diagram briefly illustrating an internal configuration of a mobile communication terminal according to a preferred embodiment of the present invention.

A mobile communication terminal according to an exemplary embodiment of the present invention includes a program memory unit 202, a parameter storage unit 204, a key input unit 206, a liquid crystal display (LCD) display unit 208, and a data storage unit 210. ), Mode state storage unit 212, Subscriber Identity Module (SIM) 214, Microprocessor (220), Digital Signal Processor (DSP) 230, Baseband A baseband converter 240, an RF signal processor 250, a speaker 260, a microphone 270, and an RF antenna 280 are included. A description of a typical internal configuration of a terminal used in a mobile communication network among the internal configurations shown in FIG. 2 is omitted.

The program memory unit 202 stores protocol software for implementing functions of the mobile communication terminal itself and for modulating and demodulating packet data or signals transmitted and received through the packet network. In addition, a predetermined wireless Internet access program that can access the CRBT server 120 is built in. In addition, the program memory unit 202 stores one or more reproduction programs for reproducing call waiting sound data transmitted through the packet network. The program memory unit 202 may include one or more playback programs for each type of the standby sound data format in order to reproduce the standby sound data demodulated by the protocol software.

The parameter storage unit 204 stores various parameters defined so that the mobile communication terminal can transmit and receive packet data. That is, when the H.323 protocol is used, various parameters related to H.323 described in FIG. 1 are stored, and when the SIP protocol is used, various parameters related to the SIP protocol are stored. Therefore, the protocol software stored in the program memory unit 202 modulates and demodulates the voice or data to be transmitted and received into packets using the parameters stored in the parameter storage unit 204.

The subscriber information storage unit 214 stores a MIN, an ESN, a personal security key, and various data necessary for the operation of the mobile communication terminal. In particular, the mobile communication terminal according to the preferred embodiment of the present invention is a VoIP terminal or a video terminal, and the subscriber information storage unit 214 stores information of a unique IP address assigned to the mobile communication terminal. The card 214 is inserted into a slot in the mobile communication terminal in the form of a card and is also called a SIM card, and performs an interface function between the mobile communication terminal and the packet network. That is, when the power of the mobile communication terminal is turned on, the mobile communication terminal exchanges all the information in the SIM card with the packet network, and the user can perform voice calls, video calls, and data transmission and the like at the same time as the use approval is lost from the packet network.

The microprocessor 220 controls the overall operation of the mobile communication terminal with reference to the state flag stored in the mode state storage unit 212. In particular, when the call waiting sound data is received following the transmission of the call setup request signal through the packet network, the microprocessor 220 loads the corresponding playback program stored in the program memory unit 202 according to the type of the call waiting sound data format received. (Loading) Plays call waiting data until the call is connected.

3 is a flowchart illustrating a process of providing a call waiting sound service according to a first embodiment of the present invention.

The originating mobile communication terminal 102 attempts to connect a call to the incoming mobile communication terminal 100 through the packet network (S300). That is, when the originating mobile communication terminal 102 transmits a setup message which is a call connection request message to the gatekeeper 110, the gatekeeper 110 transmits the MIN of the originating mobile communication terminal 102 and the terminating mobile communication terminal 100. Is converted to an IP address (S302), and it is determined whether the incoming mobile communication terminal 100 is subscribed to the call waiting service using the converted IP address (S304).

As a result of determination, when the incoming mobile communication terminal 100 is subscribed to the call waiting tone service, the call connection attempt is made to the CRBT server 120 (S306). This is because the gatekeeper 110 sends a CRBT connection request message (Setup message) to the media gateway controller 112 and the signal gateway 118, and the media gateway controller 112 and the signal gateway 118 send an initial address message (IAM). It sends a CRBT connection request message converted into.

The CRBT server 120 receiving the IAM transmits a CRBT connection response message (ACM) to the media gateway controller 112 and the signal gateway 118, and the media gateway controller 112 and the signal gateway 118 send the CRBT connection response message. (Alerting message) is sent to the gatekeeper 110. Thus, the outgoing mobile communication terminal 102 is ready to transmit a call waiting sound with the voice reception port open.

The CRBT server 120 transmits the sound source of the call waiting sound data set by the called party to the media gateway 116 (S308), and the media gateway 116 receives the sound source of the call waiting sound data so that the VoIP terminal and the video terminal can receive the sound source. The sound is converted into atmospheric sound packet data and transmitted to the outgoing mobile communication terminal 102 (S310).

The originating mobile communication terminal 102 transmits to the speaker while receiving the standby sound packet data (S312). The microprocessor 220 of the terminating mobile communication terminal 100 determines whether data related to a call connection is input from the key input unit 206 when a key button related to a call connection is pressed or a flip or folder is opened. It is determined (S314).

If it is determined in step S314 that data related to a call connection is input, the microprocessor 220 of the called mobile communication terminal 100 generates a call connection response message (Alerting message) and transmits it to the gatekeeper 110 through the packet network. (S316). When the gatekeeper 110 transmits a CRBT connection termination message (ReleaseComplete message) to the CRBT server 120, the connection with the CRBT server 120 is disconnected and the sound transmission of the call waiting sound is stopped (S318). In addition, the gatekeeper 110 transmits a call connection message to the calling mobile communication terminal 102 so as to perform a normal call between the calling mobile communication terminal 102 and the called mobile communication terminal 100.

On the other hand, when the terminating mobile communication terminal 100 is not subscribed to the call waiting tone service in step S304, the outgoing mobile communication terminal 102 transmits a general call waiting tone (S320).

Meanwhile, the above-described Setup message, IAM message, ACM message, Alerting message, ReleaseComplete message and Connection message are the formats of messages used in the ISUP protocol recommended by ITU-T.

4 is a block diagram illustrating a call waiting service system in a packet network according to a second embodiment of the present invention.

In the call waiting service in the packet network according to the second preferred embodiment of the present invention, unlike the first embodiment, data read from a server in the packet network is directly transmitted without going through the media gateway 116 or the like.

The call waiting service system in the packet network according to the second preferred embodiment of the present invention includes an incoming and outgoing mobile communication terminal (100 and 102), a base station (BS) 104, a switch 110 and 114, and a multimedia CRBT. Server 400, subscriber database 122, sound source database 402, and the like. Hereinafter, a separate description of a part performing the same function as that described with reference to FIG. 1 among the communication devices of FIG. 4 will be omitted.

The gatekeeper 400 according to the second preferred embodiment of the present invention performs a similar function to the gatekeeper 110 according to the first preferred embodiment of the present invention. However, if the gatekeeper 400 according to the second embodiment of the present invention determines that the called mobile communication terminal 100 is a terminal subscribed to the call waiting tone service, the IP address of the calling mobile communication terminal 102 and the incoming mobile communication The call setup request signal including the MIN of the terminal 100 is transmitted to the multimedia CRBT server 402.

The multimedia CRBT server 402 functions to provide a call waiting tone service to the incoming and outgoing mobile communication terminals 100 and 102 according to the second preferred embodiment of the present invention. The multimedia CRBT server 402 provides the destination mobile communication terminal 100 with a website screen constructed in a wireless markup language (WML) including a multimedia data selection function for waiting for a call, and the user of the incoming mobile communication terminal 100. Transmits the selected call waiting multimedia data to the gatekeeper 400 through the packet network according to the second embodiment of the present invention.

In addition, the multimedia CRBT server 402 works with the subscriber database 122 and the multimedia database 406 to provide the set call waiting multimedia data to the calling mobile communication terminal 102.

The multimedia database 406 stores multimedia data for call waiting in various formats provided by the multimedia CRBT server 402 according to the second embodiment of the present invention. Call waiting multimedia data stored in the multimedia database 406 is data in a packet form. The call waiting multimedia data stored in the multimedia database 406 may be classified and stored according to types of voice data, image data, and video data. Therefore, the multimedia CRBT server 402 having obtained the name and the path of the call waiting sound data to be transmitted to the outgoing mobile terminal 102 through the subscriber database 122 searches the multimedia database 406 for the corresponding information. Read and transmit multimedia data for call waiting.

The multimedia CRBT server 402 stops the transmission of the call waiting multimedia data when the call between the calling mobile communication terminal 102 and the called mobile communication terminal 100 is connected.

In the call waiting sound service according to the second embodiment of the present invention, call waiting multimedia data transmitted from the multimedia CRBT server 402 is transmitted using a streaming technique. Since the streaming technique has been described above, the description thereof is omitted.

In addition, as described above, when the call waiting sound service system according to the preferred embodiment of the present invention is configured using the SIP protocol, the switch serving as the gatekeeper 400 becomes the SIP server 404.

5 is a flowchart illustrating a process of providing a call waiting sound service according to a second embodiment of the present invention.

The originating mobile communication terminal 102 attempts to connect a call to the destination mobile communication terminal 100 through the packet network (S500). That is, when the originating mobile communication terminal 102 transmits a setup message which is a call connection request message to the gatekeeper 400, the gatekeeper 400 transmits the MIN of the originating mobile communication terminal 102 and the terminating mobile communication terminal 100. The IP address is converted into an IP address (S502), and it is determined whether the incoming mobile communication terminal 100 is subscribed to the call waiting service using the converted IP address (S504).

As a result of the determination, when the incoming mobile communication terminal 100 is subscribed to the call waiting tone service, a call connection is attempted by sending a CRBT connection request message (Setup message) to the multimedia CRBT server 402 (S506). When the multimedia CRBT server 402 sends a CRBT connection response message (Alerting message) to the gatekeeper 400, the outgoing mobile communication terminal 102 opens the audio and video receiving port. As a result, the outgoing mobile terminal 102 is ready to transmit multimedia data for call waiting.

The multimedia CRBT server 402 transmits the call waiting multimedia data set by the called party to the gatekeeper 400 (S508), and the outgoing mobile communication terminal 102 transmits the call waiting multimedia data to the speaker. (S510). The microprocessor 220 of the terminating mobile communication terminal 100 determines whether data related to a call connection is input from the key input unit 206 when a key button related to a call connection is pressed or a flip or folder is opened. It is determined (S512).

When it is determined in step S512 that data related to a call connection is input, the microprocessor 220 of the incoming mobile terminal 100 generates a call connection response message (Alerting message) and transmits it to the gatekeeper 400 through the packet network. (S514). When the gatekeeper 400 transmits a CRBT connection termination message (ReleaseComplete message) to the multimedia CRBT server 402, the connection with the multimedia CRBT server 402 is disconnected and the call waiting multimedia data transmission is stopped (S516). In addition, the gatekeeper 400 transmits a call connection message (Connection message) to the outgoing mobile terminal 102 so as to perform a normal call between the outgoing mobile terminal 102 and the incoming mobile communication terminal 100.

On the other hand, when the incoming mobile communication terminal 100 is not subscribed to the call waiting tone service in step S504, the general call waiting tone is transmitted from the outgoing mobile communication terminal 102 (S518).

Meanwhile, the above-described Setup message, IAM message, ACM message, Alerting message, ReleaseComplete message and Connection message are the formats of messages used in the ISUP protocol recommended by ITU-T.

The above description is merely illustrative of the present invention, and those skilled in the art to which the present invention pertains may various modifications without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed herein are not intended to limit the present invention but to describe the present invention, and the spirit and scope of the present invention are not limited by these embodiments. It is intended that the scope of the invention be interpreted by the following claims, and that all descriptions within the scope equivalent thereto shall be construed as being included in the scope of the present invention.

As described above, according to the present invention, when a packet-based video telephone and VoIP service is implemented in a mobile telephone network such as CDMA2000, WCDMA, and Wireless LAN, the caller sends a call ring tone or multimedia data set by the called party during call connection. By providing to the system, there is an advantage that it can provide a higher value added while expanding the area of the existing circuit-based value-added services.

In addition, mobile operators can generate new revenue by selling various multimedia data for call waiting, and improve customer satisfaction by developing new value-added services such as presenting multimedia data for call waiting. It has an effect.

Claims (72)

A method for providing a call waiting sound service, in which a call waiting tone data, which a called party sets in advance, is sent to a coloring ring back tone (CRBT) server when a calling party calls a called party through a packet network. (a) an originating mobile communication terminal attempting to connect a call to an incoming mobile communication terminal through the packet network; (b) converting a Mobile Identification Number (MIN) of the called mobile communication terminal and a MIN of the calling mobile communication terminal into an IP address, and determining whether the called mobile communication terminal has subscribed to the call waiting tone service; (c) attempting a call connection to the CRBT server when the called mobile communication terminal is subscribed to the call waiting tone service as a result of the determination of step (b); (d) the sound source of the call waiting sound data set by the called subscriber is transmitted from the CRBT server to the media gateway, and the sound source of the call waiting sound data is converted into the standby sound packet data by the media gateway and transmitted to the calling mobile communication terminal. Becoming; And (e) the originating mobile communication terminal transmitting the standby sound packet data to a speaker while the call connection is made, and the transmission is stopped while a call connection response message is transmitted from the incoming mobile communication terminal. Method for providing a call waiting service in a packet network comprising a. The method of claim 1, The call waiting service is a call waiting service in a packet network, characterized in that the call is made from the calling mobile communication terminal to the called mobile communication terminal until the call is made between the calling mobile communication terminal and the called mobile communication terminal. How to give it. The method of claim 1, The outgoing mobile terminal and the incoming mobile communication terminal are PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) phone, CDMA- A method of providing a call waiting service in a packet network comprising a 2000 phone and a mobile broadband system (MBS) phone. The method of claim 1, And the calling mobile communication terminal and the called mobile communication terminal are Voice over Internet Protocol (VoIP) terminals and / or video terminals for transmitting and receiving data packets in the packet network. The method according to claim 1 or 4, The packet network is provided with a CDMA-2000 1xEV-DO, W-CDMA, Wireless LAN method for providing a call waiting service in a packet network. The method of claim 1, And a unique IP address information is stored in the subscriber identity module (SIM) of the calling mobile terminal and the called mobile terminal. The method of claim 1, And the originating mobile communication terminal and the destination mobile communication terminal transmit and receive data packets using H.323 and / or Session Initiation Protocol (SIP). The method of claim 1, And the at least one reproducing program for reproducing the standby sound packet data is provided in the outgoing mobile communication terminal. The method of claim 8, The originating mobile communication terminal provides a call waiting sound service in a packet network, characterized in that for loading the playing program corresponding to the format of the received waiting sound packet data to play the waiting sound packet data. The method of claim 1, The packet network provides a call waiting service in a packet network, characterized in that for transmitting the standby sound packet data to the outgoing mobile communication terminal using Real Time Transport Protocol (RTP) / Real Time Control Protocol (RTCP). The method of claim 1, The CRBT server provides a call waiting service in a packet network, characterized in that for operating the call waiting tone service, a web site constructed with a hypertext markup language (HTML) or a web site constructed with a wireless markup language (WML). Way. The method of claim 1, The CRBT server includes a sound source database storing at least one call waiting sound data, a subscriber database storing personal information of subscribers subscribed to the call waiting service, and information on call waiting sound data selected for each subscriber. A method of providing a call waiting service in a packet network. The method of claim 1, And the media gateway converts the airborne packet data into streaming airborne packet data in a streaming format and transmits the airborne packet data to the originating mobile communication terminal through the packet network. The method of claim 13, The outgoing mobile communication terminal provides a call waiting sound service in a packet network, characterized in that a streaming program for transmitting the streaming waiting sound packet data directly to a speaker is mounted. The method of claim 1, The call waiting sound service information includes a MIN of a mobile communication terminal applying for the call waiting sound service, a name and a path of the selected waiting sound data. The method of claim 1, And the CRBT server stops transmitting the call waiting sound data source when receiving the call acceptance signal. A method for providing a call waiting sound service, in which a call waiting multimedia data is transmitted to a multimedia coloring ring back tone (CRBT) server when a calling subscriber calls a called party through a packet network. (a) an originating mobile communication terminal attempting to connect a call to an incoming mobile communication terminal through the packet network; (b) converting a Mobile Identification Number (MIN) of the called mobile communication terminal and a MIN of the calling mobile communication terminal into an IP address, and determining whether the called mobile communication terminal has subscribed to the call waiting tone service; (c) attempting a call connection to the multimedia CRBT server when the called mobile communication terminal is subscribed to the call waiting tone service as a result of the determination of step (b); (d) transmitting, by the multimedia CRBT server, the call waiting multimedia data to the calling mobile communication terminal; And (e) the calling mobile communication terminal transmits while receiving the call waiting multimedia data, and when the call connection is made, the call is stopped while the call connection response message is transmitted from the called mobile communication terminal; The method for providing a call waiting sound service that the multimedia data for call waiting is transmitted in a packet network comprising a. The method of claim 17, The call waiting sound service is performed until the call is made from the originating mobile communication terminal to the called mobile communication terminal until the call is made between the calling mobile communication terminal and the called mobile communication terminal. A method of providing a call waiting sound service for transmitting multimedia data. The method of claim 17, The outgoing mobile terminal and the incoming mobile communication terminal are PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) phone, CDMA- A method for providing a call waiting sound service in which multimedia data for call waiting is transmitted in a packet network including a 2000 phone and a mobile broadband system (MBS) phone. The method of claim 17, The calling mobile communication terminal and the called mobile communication terminal are voice over internet protocol (VoIP) terminals and / or video terminals for transmitting and receiving data packets in the packet network. How to Provide Services. The method of claim 17 or 20, The packet network is a CDMA-2000 1xEV-DO, W-CDMA, Wireless LAN in a packet network, characterized in that the call waiting sound service for transmitting a call waiting multimedia data in the packet network. The method of claim 17, A call waiting sound service for transmitting call waiting multimedia data in a packet network, characterized in that unique IP address information is stored in the subscriber identity module (SIM) of the calling mobile terminal and the called mobile terminal. How to give it. The method of claim 17, The calling mobile communication terminal and the called mobile communication terminal transmit and receive data packets by using H.323 and / or Session Initiation Protocol (SIP). How to give. The method of claim 17, And at least one playback program for reproducing the call waiting multimedia data in the outgoing mobile communication terminal. The method of claim 24, The outgoing mobile terminal transmits the call waiting multimedia data by loading the play program corresponding to the format of the call waiting multimedia data, and plays the call waiting multimedia data. How to provide call waiting service. The method of claim 17, The packet network transmits the call waiting multimedia data to the outgoing mobile communication terminal using Real Time Transport Protocol (RTP) / Real Time Control Protocol (RTCP). How to provide call waiting service. The method of claim 17, The multimedia CRBT server operates a website constructed in HyperText Markup Language (HTML) or a website constructed in Wireless Markup Language (WML) to provide the call waiting sound service. To provide a call waiting service that is sent out. The method of claim 17, The multimedia CRBT server stores a multimedia database storing one or more of the call waiting multimedia data, a subscriber database of personal information of subscribers subscribed to the call waiting service, and information of call waiting multimedia data selected for each subscriber. The method for providing a call waiting sound service that the multimedia data for call waiting is transmitted in a packet network comprising a. The method of claim 17 or 28, The call waiting multimedia data in the packet network, characterized in that one or more of the voice data, image data and video data to provide a call waiting sound service for the call waiting multimedia data is sent. The method of claim 17, The multimedia CRBT server converts the call waiting multimedia data into streaming data in a streaming format and transmits the call waiting multimedia data to the outgoing mobile terminal through the packet network. How to provide a waiting sound service. The method of claim 17 or 30, And a streaming program for transmitting the streaming data directly to a speaker while receiving the streaming data. The method of claim 17, The call waiting sound service information includes the MIN of the mobile communication terminal applying for the call waiting sound service, a name and a path of the selected call waiting multimedia data. How to provide call waiting service. The method of claim 17, And the multimedia CRBT server stops the transmission of the call waiting multimedia data when the call accept signal is received. A call waiting tone service providing system for reproducing call waiting tone data preset by a called party to a coloring ring back tone (CRBT) server when a calling party calls a called party through a packet network. An incoming mobile communication terminal for applying for the call waiting tone service and selecting the call waiting tone data to be used for the call waiting tone service; An outgoing mobile communication terminal that receives and reproduces the call waiting sound data through the packet network; A wireless base station providing a data packet service to the calling mobile communication terminal and the called mobile communication terminal and transmitting and receiving the call waiting sound data; Receives a call setup message from the calling mobile terminal and performs a call connection with the called mobile terminal, and MIN (Mobile Identification Number) of the called mobile terminal and the MIN of the calling terminal. An exchange that translates to an address; A CRBT server providing the call waiting sound service to the calling mobile communication terminal and transmitting a sound source of the call waiting sound data selected by the called mobile communication terminal through the packet network; A media gateway receiving the sound source of the call waiting sound data and converting the call waiting sound data into atmospheric packet data for transmission by the calling mobile communication terminal; And A media gateway controller receiving a call connection message from the exchange and performing a call connection with the CRBT server System for providing a call waiting sound service in a packet network comprising a. The method of claim 34, wherein The call waiting service is a call waiting service in a packet network, characterized in that the call is made from the calling mobile communication terminal to the called mobile communication terminal until the call is made between the calling mobile communication terminal and the called mobile communication terminal. System to provide. The method of claim 34, wherein The outgoing mobile terminal and the incoming mobile communication terminal are PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) phone, CDMA- A system for providing a call waiting service in a packet network, including a 2000 phone and a mobile broadband system (MBS) phone. The method of claim 34, wherein And the outgoing mobile communication terminal and the destination mobile communication terminal are Voice over Internet Protocol (VoIP) terminals and / or video terminals for transmitting and receiving data packets in the packet network. 38. The method of claim 34 or 37, The packet network is a system for providing a call waiting service in the packet network, characterized in that based on CDMA-2000 1xEV-DO, W-CDMA, Wireless LAN. The method of claim 34, wherein And a unique IP address information is stored in the subscriber identity module (SIM) of the calling mobile communication terminal and the called mobile communication terminal. The method of claim 34, wherein And the originating mobile terminal and the called mobile terminal transmit and receive data packets using H.323 and / or Session Initiation Protocol (SIP). The method of claim 34, wherein And the outgoing mobile communication terminal includes at least one reproducing program for reproducing the standby sound packet data. The method of claim 34, wherein The originating mobile communication terminal provides a call waiting sound service in a packet network, characterized in that for playing the waiting sound packet data by loading the playing program corresponding to the format of the received waiting sound packet data. The method of claim 34, wherein The packet network provides a call waiting service in a packet network, characterized in that for transmitting the standby sound packet data to the outgoing mobile communication terminal using Real Time Transport Protocol (RTP) / Real Time Control Protocol (RTCP). The method of claim 34, wherein The switch is a gate keeper when the packet network is implemented in H.323, and a SIP server when the packet network is implemented in Session Initiation Protocol (SIP). System. The method of claim 34, wherein The switch is stored in the packet network, characterized in that the information on the MIN, ESN (Electrical Serial Number) and the call waiting service of the outgoing mobile communication terminal and the called mobile communication terminal registered therein is stored. System that provides services. The method of claim 34, wherein And the exchange has a built-in address translation table including the MIN and the IP address corresponding to the MIN to convert the MIN into the IP address. The method of claim 34, wherein The CRBT server provides a call waiting service in a packet network, characterized in that for operating the call waiting tone service, a web site constructed with a hypertext markup language (HTML) or a web site constructed with a wireless markup language (WML). system. The method of claim 34, wherein The CRBT server includes a sound source database storing at least one call waiting sound data, a subscriber database storing personal information of subscribers subscribed to the call waiting service, and information on call waiting sound data selected for each subscriber. System that provides call waiting service in packet network. The method of claim 34, wherein And the media gateway converts the airborne packet data into streaming airborne packet data in a streaming format and transmits the airborne packet data to the calling mobile terminal through the packet network. The method of claim 49, The outgoing mobile communication terminal provides a call waiting sound service in a packet network, characterized in that a streaming program for transmitting the streaming waiting sound packet data directly to a speaker is mounted. The method of claim 34, wherein The call waiting tone service information includes a MIN of a mobile communication terminal applying for the call waiting tone service, a name and a path of the selected call waiting tone data. The method of claim 34, wherein The CRBT server provides a call waiting service in the packet network, characterized in that to stop the transmission of the call waiting sound data source when receiving the call acceptance signal. A system for providing a call waiting sound that allows a called party to transmit a preset call waiting multimedia data to a multimedia coloring ring back tone (CRBT) server when a calling party calls a called party through a packet network. An incoming mobile communication terminal which subscribes to the call waiting tone service and selects the call waiting multimedia data to be used for the call waiting tone service; An outgoing mobile communication terminal which receives and reproduces the call waiting multimedia data through the packet network; A wireless base station providing a data packet service to the calling mobile communication terminal and the called mobile communication terminal and transmitting and receiving the call waiting multimedia data; Receives a Call Setup message from the calling mobile terminal and performs a call connection with the called mobile terminal, and MIN (Mobile Identification Number) of the called mobile terminal and the MIN of the calling mobile terminal. An exchange that translates to an IP address; And The multimedia CRBT server providing the call waiting sound service to the calling mobile communication terminal and transmitting the call waiting multimedia data selected by the called mobile communication terminal through the packet network. The system for providing a call waiting sound service, the multimedia data for call waiting is transmitted in a packet network comprising a. The method of claim 53, wherein The call waiting sound service is performed until the call is made from the originating mobile communication terminal to the called mobile communication terminal until the call is made between the calling mobile communication terminal and the called mobile communication terminal. A system for providing a call waiting service for transmitting multimedia data. The method of claim 53, wherein The outgoing mobile terminal and the incoming mobile communication terminal are PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) phone, CDMA- A system for providing a call waiting sound service for transmitting call waiting multimedia data in a packet network, including a 2000 phone and a mobile broadband system (MBS) phone. The method of claim 53, wherein The calling mobile communication terminal and the called mobile communication terminal are voice over internet protocol (VoIP) terminals and / or video terminals for transmitting and receiving data packets in the packet network. System that provides services. The method of claim 53 or 56 wherein The packet network is a CDMA-2000 1xEV-DO, W-CDMA, Wireless LAN system for providing a call waiting sound service for transmitting call waiting multimedia data in a packet network, characterized in that based on. The method of claim 53, wherein A call waiting sound service for transmitting call waiting multimedia data in a packet network, characterized in that unique IP address information is stored in the subscriber identity module (SIM) of the calling mobile terminal and the called mobile terminal. System to provide. The method of claim 53, wherein The calling mobile communication terminal and the called mobile communication terminal transmit and receive data packets by using H.323 and / or Session Initiation Protocol (SIP). Providing system. The method of claim 53, wherein And the outgoing mobile communication terminal has at least one playing program for reproducing the call waiting multimedia data. The method of claim 53, wherein The outgoing mobile terminal transmits the call waiting multimedia data by loading the play program corresponding to the format of the call waiting multimedia data, and plays the call waiting multimedia data. A system for providing a call waiting service. The method of claim 53, wherein The packet network transmits the call waiting multimedia data to the outgoing mobile communication terminal using Real Time Transport Protocol (RTP) / Real Time Control Protocol (RTCP). System that provides call waiting service. The method of claim 53, wherein The switch is a gate keeper when the packet network is implemented in H.323, and a SIP server when the packet network is implemented in Session Initiation Protocol (SIP). System. The method of claim 53, wherein The switch is stored in the packet network, characterized in that the information on the MIN, ESN (Electrical Serial Number) and the call waiting service of the outgoing mobile communication terminal and the called mobile communication terminal registered therein is stored. System that provides services. The method of claim 53, wherein And the exchange has a built-in address translation table including the MIN and the IP address corresponding to the MIN to convert the MIN into the IP address. The method of claim 53, wherein The multimedia CRBT server operates a website constructed in HyperText Markup Language (HTML) or a website constructed in Wireless Markup Language (WML) to provide the call waiting sound service. System that provides call waiting sound that is sent out. The method of claim 53, wherein The multimedia CRBT server stores a multimedia database storing one or more of the call waiting multimedia data, a subscriber database of personal information of subscribers subscribed to the call waiting service, and information of call waiting multimedia data selected for each subscriber. A system for providing a call waiting sound service, wherein the call waiting multimedia data is transmitted in a packet network comprising a. 68. The method of claim 53 or 67 wherein The call waiting multimedia data is a system for providing a call waiting sound service for transmitting call waiting multimedia data in a packet network, characterized in that it comprises at least one of voice data, image data and video data. The method of claim 53, wherein The multimedia CRBT server converts the call waiting multimedia data into streaming data in a streaming format and transmits the call waiting multimedia data to the outgoing mobile terminal through the packet network. A system that provides atmospheric sound services. 70. The method of claim 53 or 69 wherein The outgoing mobile communication terminal is provided with a streaming program for transmitting the streaming data directly to the speaker while receiving the streaming data, the system for providing a call waiting sound service for the call waiting multimedia data in the packet network. The method of claim 53, wherein The call waiting sound service information includes the MIN of the mobile communication terminal applying for the call waiting sound service, a name and a path of the selected call waiting multimedia data. A system for providing a call waiting service. The method of claim 53, wherein And the multimedia CRBT server stops the transmission of the call waiting multimedia data when the call accept signal is received.