KR100645923B1 - Multimedia Ring Back Tone Service Method and Sytem Based on Packet Data Communication Network - Google Patents

Abstract

The present invention uses a signaling protocol through a packet communication network, and provides a multimedia communication ring tone service based on a packet communication network to provide various multimedia data such as text, images, and video as well as audio as a ring tone when a call is made or received. Method and system,

According to the present invention, it is possible to provide an initial media service such as a multimedia ringback tone or an announcement service in an environment where multimedia services are common, and the caller can determine whether there is a misconnection until the caller answers, and further, the characteristics of the user. It can provide various ringback tone services that conform to In addition, it is possible to provide a service corresponding to the era of transmitting and receiving multimedia data through a mobile terminal, thereby greatly increasing user convenience.

Ring back tone, packet network, multimedia, ring back tone, video, audio, gatekeeper, H323, IP, mobile terminal, signaling protocol

Description

Multimedia Ring Back Tone Service Method and System based on Packet Data Communication Network             

1 is a schematic diagram showing the configuration of a conventional subscriber-based ringback tone service device;

2 is a configuration diagram schematically showing the configuration of a multimedia ring back tone service system according to an embodiment of the present invention;

3 is a flowchart illustrating a packet communication network based multimedia ring back tone service method according to an embodiment of the present invention.

※ Explanation of codes for main parts of drawing

100: subscriber based ringback tone service device 10: home location register

20: No.7 net 31,32: exchanger

40,90: Gateway 50: Sound source providing device

60: Internet network 70: sound source control server

80: subscriber storage database 95: web server

200: multimedia call ring tone service system 210: calling terminal

212: terminating terminal 220: IP access network

230, 232: Gatekeeper 240: Application Server

242: service information database 250: location registration server

260: media server

The present invention relates to a packet communication network based multimedia ring back tone service method and system in a mobile communication network, and more particularly, uses a signaling protocol through a packet communication network, and not only audio as a ring back tone at an outgoing or incoming call for a telephone call. The present invention relates to a packet communication network based multimedia ring back tone service method and system for providing various multimedia data such as text, images, and video.

In general, when a caller attempts to make a phone call in a mobile communication network, an exchange of a called subscriber transmits a ring back tone to the caller.

1 is a configuration diagram schematically showing the configuration of a conventional subscriber-based ringback tone service device.

As shown in FIG. 1, a conventional subscriber-based ringback tone service apparatus 100 includes a home location register (HLR) 10 that registers a location of a mobile terminal; Exchangers (O_MSC / VLR, T_MSC / VLR) 31,32 which communicate with a home location register (HLR) 10 via a No.7 network 20 based on a Signaling Transfer Protocol (STP); A sound source providing device (Intelligent Peripheral: IP) 50 connected to the No. 7 network 20 and communicating with the exchanges 31 and 32 via a gateway (CGS) 40; A sound source providing control server (IP server) 70 for data communication with the sound source providing apparatus 50 via the Internet network 60; A subscriber database 80 connected to the home location register 10 via the internet network 60; It is composed of a Web server (95) connected to the Internet network 60 through the gateway 90 to communicate with the sound source providing apparatus 50 and the sound source providing control server 70.

However, since the conventional ringback tone providing method of the ringback tone service device configured as described above provides the same tone uniformly, the caller cannot determine whether there is a erroneous connection until the answer of the called party, and further, various ringback tones corresponding to the characteristics of the user. There is a problem that can not provide an alternative service.

On the other hand, in recent years there has been proposed a method to play a variety of advertisement sound instead of the uniform ringback tone as described above, but also the specific advertisement sound selected by the network operator in a batch without the subscriber's choice to the caller and then predetermined Since the call is free for a time, the caller cannot determine whether there is a misconnection until the answer of the called party, and furthermore, there is a problem in that it cannot provide various ringback tone services that match the characteristics of the user.

In addition, by improving the above problems, as the called party selects and designates a desired sound source from various sound sources, the caller sends out a specific sound source set by the called party until the called party answers, but also through the circuit network Since the service is mainly oriented, there is a problem that the service is behind the age of transmitting and receiving multimedia data through the mobile terminal.

In order to solve the above problems, the present invention uses a signaling protocol through a packet communication network, and transmits a variety of multimedia data such as text, images, and video as a ring back tone as a ring back tone when a call is made or received for a telephone call. An object of the present invention is to provide a method and system for providing a multimedia ring back tone service based on a packet communication network.

Packet communication network based multimedia ring back tone service system according to the present invention for achieving the above object, in the multimedia ring back tone service system for providing multimedia data as a ring back tone when a call is set up for a telephone call, wired and wireless communication network and packet network A communication terminal for receiving multimedia data through a ring tone during call setup; An IP access network for transmitting and receiving data in the form of an IP packet by interworking the wired / wireless communication network with the Internet network; A gatekeeper managing registration information and service profile information of the communication terminal; An application server for storing and managing information on an initial media service set by a subscriber, and controlling to provide the multimedia data to a calling terminal as a ring back tone according to the initial media service set by the subscriber at the time of call setup; And a media server that stores a plurality of multimedia data and transmits the multimedia data corresponding to the initial media service set by the subscriber to the calling terminal until the call is connected under the control of the application server. It is done.

In addition, the packet communication network based multimedia ring back tone service method according to another object of the present invention, in the multimedia ring back tone service method for providing multimedia data as a ring back tone when a call is set up for a telephone call, the calling terminal to the called terminal; Requesting call setup of the first step; Routing a call establishment request to the application server at the gatekeeper; A third step of the application server querying the setting of the initial media service of the called terminal; A fourth step of transmitting a sound source transmission command for the initial media service from the application server to a media server; And a fifth step of providing, by the media server, the multimedia terminal according to the setting of the initial media service to the calling terminal as a ring back tone.

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.

First, H.323 will be described to help understand the description of the present invention.

Voice over Internet Protocol (VoIP) works by digitizing voice, sending it in data packets, and converting it back to voice at the receiving end. Accordingly, the VoIP data packet is present in a Real-Time Transport Protocol (RTP) packet, and the RTP packet is present in a User Datagram Protocol (UDP) -IP packet.

Here, VoIP does not use Transmission Control Protocol (TCP) but uses UDP because TCP is too heavy in a real-time application. UDP does not control the order of packets arriving at the destination and does not care how long it takes to arrive at the destination. Both of these features are very important for overall voice quality (how well you can hear what others are saying) and conversation quality (how easy it is to talk). RTP solves this problem in two ways, allowing the receiver to organize the packets it receives in the correct order, and not to wait too much time waiting for lost or too long packets to arrive. That is, what is needed for transmission is not all parts of a voice packet, but a continuous flow of packets in the correct order.

Because users want a two-way interactive voice exchange, VoIP applications require real-time data streaming. Unfortunately, TCP / IP can't guarantee this goal, it just handles it "on the fly." Therefore, the following tactics and policies need to be set up so that the packets can be managed by all routers through which the packets pass.

1) The TOS (Type Of Service) field of the IP protocol indicates the type of service. A higher value indicates that the service is not urgent.

2) It is better not to use FIFO (First In First Out) when enqueuing a packet, which is worse than serving packets in the order in which they arrived.

3) WFQ (weighted fair queue) strives for fair service of packets. This is done by a fair method of determining the type of data flow and processing one UDP packet and one TCP packet.

4) The user defined queue (CQ) determines the priority of the user.

5) The PQ (priority queue) consists of several (usually four) queues, each with its own priority. Packets are preferentially serviced in the high priority queue, and when the high priority queue becomes empty, it begins to service the queue below it.

6) CB-WFQ (fair queue weighting based on stages) is similar to WFQ, but additionally has 64 stages and corresponding bandwidth values.

7) As a way of avoiding congestion, such as Random Early Detection (RED), programs like MS Netmeeting use the H323 protocol for VoIP.

H.323 is an ITU-T standard for transmitting multimedia videoconferencing data over packet-switched networks such as TCP / IP. This includes the LAN standard for high quality video and the Internet standard for transmitting video in the low frequency band over slow lines as high as 28.8 Kbps.

The H.323 protocol allows several elements to communicate with each other, providing a terminal that is a client that initiates a VoIP connection. Although terminals can interact with each other without other elements, they require some additional elements in terms of scalability.

1) Gatekeepers are provided. The essential action of this is to perform address translation so that you can use names instead of IP addresses.

2) Allow and deny connections to hosts and users.

3) Manage bandwidth.

4) A gateway is provided. This is the translation reference point for TCP / IP and PSTN.

5) Multipoint Control Units (MCUs) are provided for the conference function.

6) The proxy server is used.

7) It supports not only VoIP but also video communication and data communication. H323 can carry audio codecs G.711, G.722, G.723, G.728 and G.729 for VoIP, and H261 and H263 for video codecs.

2 is a block diagram schematically showing the configuration of a multimedia ring back tone service system according to an embodiment of the present invention.

The multimedia ring back tone service system 200 according to the present invention includes a calling terminal (UE # 1) 210, a called terminal (UE # 2) 212, an IP access network 220, and a gatekeeper: 230-232, an application server 240, a service information database 242, a location registration server 250, a media server 260, and the like.

The calling terminal 210 and the called terminal 212 are mobile terminals that receive multimedia data through a ring back tone when making or receiving calls through the mobile communication network and the IP packet network. In addition, the calling terminal 210 and the called terminal 212 also includes a wired terminal that receives the multimedia data for the ring back tone by the interworking of the PSTN network and the IP packet network.

The IP access network 220 functions to transmit and receive data in the form of an IP packet by interworking the above-described mobile communication network and the Internet network. The IP access network 220 converts the signal of the mobile communication network transmitted from the mobile terminal into IP packet data or transmits the data to the IP packet data. The transmitted IP packet data is converted into a signal of a mobile communication network and transmitted.

The source and destination gatekeepers 230 and 232 function as address translation and access control for H.323 terminals, and inform the terminal of the location of the gateway or provide bandwidth. ) The device to manage. In addition, the gatekeeper 230 manages registration information and service profile information of the calling terminal 210 and the called terminal 212. Here, the gateway (Gateway) is a device that allows the terminal connected to the Internet network to perform real-time bidirectional communication with the terminal connected to the PSTN network.

The application server 240 stores and manages information on the initial media service set by the calling terminal 210 or the called terminal 212 and stores the information on the initial media service set by the mobile terminal at the time of originating or receiving. Accordingly, the control of providing the call connection sound and the multimedia data to the calling terminal 210 through the media server 260 is performed.

The service information database 242 stores data on a call ring tone set by a subscriber, a basic sound source for a call ring tone, a sound source by a caller, a sound source by a call group, a sound source by a time zone, and the like. Is saving.

The location registration server 250 stores the registration location and service profile information of the subscriber's mobile terminal and can be constructed and managed by a separate system. However, in the embodiment of the present invention, the H.323-based packet network configuration is conventional. It is assumed that the gatekeeper 220 is internally managed.

The media server 260 stores a plurality of multimedia data including texts, images, avatars, emoticons, videos, flash animations, and the like. The media server 260 controls the multimedia information set by the subscriber under the control of the application server 240. It transmits the corresponding multimedia data to the calling terminal 210 until the call is connected.

Hereinafter, a packet communication network based multimedia ring back tone service method according to an embodiment of the present invention will be described with reference to the flowchart of FIG. 3 based on the above-described configuration.

First, the originating terminal 210 and the terminating terminal 212 are registered in advance by using a H.323-based Registration Request (RRQ) / RCF (Registration Confirm) message to the gatekeepers 230 and 232, respectively. In this state, the calling terminal 210 transmits an ARQ (Admission Request) message to the calling gatekeeper 230 to set up a call for a telephone call to the called terminal 212 and requests acceptance of the call setting. (S302). Here, the call setup acceptance request message includes the telephone number of the calling terminal 210 and the telephone number of the called terminal which is the call setup target.

In response to this, the calling gatekeeper 230 transmits a Location Request (LRQ) message requesting the address of the called terminal 212 to the called gatekeeper 232 (S304).

When the receiving side gatekeeper 232 receives the LRQ message, the receiving terminal 212 checks whether the receiving terminal 212 is a terminal registered with the receiving terminal 212, and responds with an LCF (Location Confirmation) message including an incoming response (S306).

When the calling gatekeeper 230 receives the LCF message from the called gatekeeper 232, the calling gatekeeper 230 transmits an ACF (Admission Confirmation) message to the calling terminal 210 to accept the call establishment request from the calling terminal 210. Respond to the message (S308).

The originating terminal 210 transmits a call setup message to the originating gatekeeper 230 for packet-based call setup to the terminating terminal 212 using a Fast Start (FS) function of H.323. Perform a quick call setup (S310).

In this case, the calling terminal 210 may include capability information such as its codec and playable media type, and an address (IP address, Port) to process the RTP / RTCP media in the call setup message. Afterwards, when the user receives the initial media (call connection sound, announcement, etc.), he or she must enter a receive mode so that the user can play it. In addition, the originating terminal 210 may transmit an identifier indicating that the initial media service can be processed in the call setup message, thereby allowing the application server 240 to make a service provision decision.

The calling gatekeeper 230 transmits a call setup message to the called gatekeeper 232 (S312).

The called-side gatekeeper 232 manages registration information and service profile information of the called terminal 212, finds out what additional service processing is required through service triggering on an incoming call, and checks the corresponding application server ( The call is routed to 240 (S314).

The application server 240 that performs the initial media service processing queries the service information database 242 that manages the service information of the called terminal 212 as part of the process of processing the additional service, and the called terminal 212 with respect to the called terminal 212. The set specific sound source code information is found (S316). At this time, the specific sound source code information is set to a basic sound source, a caller, a call group, a time zone, and the like.

The application server 240 obtains information set as the initial media of the called terminal 212 from the service information database 242 (S318).

The application server 240 transmits to the media server 260 a sound source transmission command message including initial setting information obtained from the service information database 242, that is, sound source information and a caller address (IP address, Port, etc.) ( S320).

The media server 260 transmits an Ack message to the application server 240 in response to the sound source transmission command message (S322).

When the application server 240 receives an acknowledgment (Ack) message for the sound source transmission command message from the media server 260, the application server 240 transmits an alerting response message to the calling terminal 210 (S324). However, at this time, even if the calling terminal 210 receives the alert response message, it should not play the local ring, so the alert response message should include information on the initial media message. Otherwise, do not send an alarm response message. In addition, by including the media type and codec information for initial media processing and the initial media service identifier in the alert response message, the calling terminal 210 may prepare for initial media processing. The alerting response message is performed at the same time as the procedure of steps S316 to S322 to reduce the delay in providing the service.

The media server 260 transmits the set multimedia of the called terminal 212 to the calling terminal 210 in real time according to the sound source transmission command message from the application server 240 (S326). In this case, the media server 260 may use the RTP / RTCP protocol. Here, the multimedia includes text, voice / sound / effect sound / audio, image / avatar / emoticon, video / flash animation, and composite media thereof. In addition, when the transmission is transmitted to the caller terminal 210, it provides a function to repeatedly play at a predetermined time interval so that there is no break.

The application server 240 transmits a call setup request message to the called terminal 212 through the called gatekeeper 232 in order to connect a call between the calling terminal 210 and the called terminal 212 (S328). ). The call setup request message may be processed by the application server 240 at the same time as performing the procedure of step S316 to shorten the call setup time.

The called terminal 212 raises the ARQ message to the called gatekeeper 232 to establish a call with the packet communication network, and the called gatekeeper 232 responds with an ACF message (S330).

The called terminal 212 transmits an alerting response message to the application server 240 through the called gatekeeper 232 in response to the call setup request message (S332).

When the called party accepts the call request by picking up the handset or pressing a call button, the called terminal 212 transmits a connect response message to the application server 240 through the called gatekeeper 232 (S334).

The application server 240 transmits a connection response message to the calling terminal 210 through the calling gatekeeper 230 (S336). In this case, the application server 240 includes codec information to be used for regular media, which is an actual terminal-to-terminal call, in the connect response message, thereby causing the originating terminal 210 to process the initial media. It can be prepared so that regular media processing with the opposite terminal can be performed. This is a method that can be useful when the media type and codec of Early Media and Regular Media are different. Here, the regular media is a kind of media corresponding to the actual call contents.

When the application server 240 receives a Connect response message indicating that the called party has accepted the call, the application server 240 transmits a command to stop transmission of the multimedia call connection tone, which is being transmitted to the calling terminal 210, to the media server 260. (S338). In this case, the transmission stop command message may be sent immediately after the procedure of step S334 of receiving the connect response message, but the reproduction of the initial media, that is, the multimedia call ring tone being received by the calling terminal 210, is performed. In order to provide the best possible guarantee, the media server 260 may later issue a stop command. Thus, until the actual media (Regular Media) between the calling terminal 210 and the called terminal 212 is connected to the initial media (Early Media), which is provided as a ring back tone, is provided as much as possible before being replaced with regular media. To be possible.

The media server 260 transmits an Ack message in response to the transmission stop command message to the application server 240 and stops the media transmission to the calling terminal 210 at step S340.

After the call setup process between the calling terminal 210 and the called terminal 212 is completed, the initial media provided to the calling terminal 210 is exchanged with regular media corresponding to the actual call. At this time, the initial media (Early Media) of the multimedia call connection sound delivered to the calling terminal 210 is terminated, and then the actual call path (Regular Media) between the calling terminal 210 and the called terminal 212 is formed (S342). . Here, there is a possibility that a gap occurs in the process of media conversion from the initial media to regular media, which means that even after receiving a Connect response message from the calling terminal 210, the early media from the packet communication network is connected with the other party. The problem is solved by continuously receiving and reproducing the last screen (stopping the last screen) until the actual path is formed.

In addition, even after the media switching, if the originating terminal 210 receives the early media (call ring tone) that should be stopped before due to packet communication network problems or IP traffic characteristics, the calling terminal 210 itself through RTP filtering. This is solved by discarding other than the packet data transmitted from the destination terminal 212, which is a large power station.

As described above, according to the present invention, a signaling protocol is used through a packet communication network, and various multimedia data such as text, image, video, etc. as the ring back tone are provided as the ring back tone when a call is made or received for a telephone call. A packet communication network based multimedia ring back tone service method and system can be realized.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, an initial media service such as a multimedia ringback tone or an announcement service can be provided in an environment where multimedia services are common. In addition, the caller can determine whether there is a erroneous connection until the answer of the called party, and further provide various ringback tone services that match the characteristics of the user. In addition, it is possible to provide a service corresponding to the era of transmitting and receiving multimedia data through a mobile terminal, thereby greatly increasing user convenience.

Claims (15)

In a multimedia ring back tone service system for providing multimedia data as a ring back tone when a call is set up for a phone call, A communication terminal for receiving multimedia data with a ring back tone when establishing a call through a wired or wireless communication network and a packet network; An IP access network for transmitting and receiving data in the form of an IP (Internet Protocol) packet by interworking the wired / wireless communication network with the Internet network; A gatekeeper for managing registration information and service profile information of the communication terminal; An application for storing and managing information about an initial media service set by a subscriber, and controlling the multimedia data to be provided to the calling terminal as a ring back tone according to the initial media service set by the subscriber at the time of call setup. Server (Application Server); And A media server stores a plurality of multimedia data, and transmits the multimedia data corresponding to the initial media service set by the subscriber to the calling terminal until the call is connected under the control of the application server. Packet communication network based multimedia ring back tone service system, characterized in that the. The method of claim 1, Stores the data for the ring back tone set by the subscriber, the basic sound source for the call ring tone, the sound source for each caller, the sound source for the calling group, the sound source for each time zone, and the information on the initial media service set by the subscriber. A service information database; And And a location server which stores registration location and service profile information of the communication terminal of the subscriber. The method of claim 1, The communication terminal is a mobile terminal that receives the multimedia data as a ring back tone through the IP access network of the mobile communication network and the packet network; Packet communication network based multimedia ring back tone service system, characterized in that the wired terminal for receiving the multimedia data as a ring back tone through the IP connection network of the PSTN and the packet network interworking. The method of claim 1, The gatekeeper functions to include address translation and access control for the H.323 terminal, and informs the terminal of the gateway location or manages bandwidth. Packet communication network based multimedia ring back tone service system, characterized in that the. The method according to claim 1 or 3, The multimedia data, packet communication network based multimedia ring back tone service system, characterized in that it comprises a text, an image, an avatar, an emoticon, a video, a flash animation. The method of claim 3, wherein The IP access network converts and transmits a signal of a mobile communication network transmitted from the mobile terminal into IP packet data, or converts and transmits IP packet data transmitted from the Internet network into a signal of a mobile communication network. Based multimedia ring back tone service system. In a multimedia ring back tone service method for providing multimedia data as a ring back tone when a call is set up for a phone call, A first step of requesting, by the calling terminal, to establish a call to the called terminal; Routing a call establishment request to the application server at the gatekeeper; A third step of the application server inquiring setting of an initial media service of the called terminal; A fourth step of transmitting a sound source transmission command for the initial media service from the application server to a media server; And And a fifth step of providing, by the media server, the multimedia terminal according to the setting of the initial media service to the calling terminal as a ring back tone. The method of claim 7, wherein Prior to the first step, the calling terminal and the called terminal have previously registered their location using the H.323-based Registration Request (RRQ) / Registration Confirm (RCF) message to the gatekeeper. Packet communication network based multimedia ring back tone service method characterized in that the. The method of claim 7, wherein In the first step, the calling terminal transmits an ARQ (Admission Request) message to the calling gatekeeper to set up a call for a telephone call to the called terminal and requests acceptance of call establishment. In response to this, the calling gatekeeper transmits a LRQ (Location Request) message requesting the address of the called terminal to the called gatekeeper. When the called gatekeeper receives the LRQ message, the called gatekeeper checks whether the called terminal is a terminal registered to the called terminal, and responds with an LCF (Location Confirmation) message including an incoming response. When the calling gatekeeper receives the LCF message, the calling gatekeeper transmits an ACF (Admission Confirmation) message to accept the call establishment request from the calling terminal to the calling terminal, and responds to the ARQ message. The calling terminal transmits a call setup message to the calling gatekeeper 230 for packet-based call setup to the called terminal, and sets up a fast call using the Fast Start (FS) function of H.323. Conducting, The originating gatekeeper transmits a call setup message to the called gatekeeper, and the called gatekeeper finds out what additional service processing is required through service triggering on the incoming signal, and sends it to the application server. Packet communication network based multimedia ring back tone service method, characterized in that for routing the call of the second step. The method of claim 9, The calling terminal includes capability information including its codec and playable media type and an address for processing an RTP / RTCP media in the call setup message. Thereafter, when the multimedia data is received as the initial media to the user, the terminal switches to the receive mode to play the multimedia data, and opens the receiving port. Packet communication network based multimedia ring back tone, which enables the application server to make a service provision decision by transmitting an identifier indicating that the initial media service can be processed in the call setup message. Service method. The method of claim 7, wherein In the third step and the fourth step, the application server obtains the setting information of the initial media service from the service information database, and transmits a sound source transmission command message including sound source information and caller address to the media server. Packet communication network based multimedia ring back tone service method. The method of claim 7, wherein In the fourth step, when the application server receives an Acknowledgment (Ack) message for the sound source transmission command from the media server, and transmits an alerting response message to the calling terminal, Packet communication network, characterized in that the originating terminal to prepare for the initial media (Early Media) processing by including the media type and codec information and initial media service identifier for the initial media (Early Media) processing in the alert response message Based multimedia ring back tone service method. The method of claim 7, wherein After the fifth step, when the called party accepts the call request by picking up the handset or pressing a call button, the called terminal transmits a connect response message to the application server through the called side gatekeeper, The application server transmits the connect response message to the calling terminal through the calling gatekeeper, and transmits a command to stop transmission of the multimedia call connection tone currently being transmitted to the calling terminal to the media server. , The media server transmits an Ack message in response to the transmission stop command message to the application server and simultaneously stops media transmission to the calling terminal. The method of claim 13, The application server includes codec information to be used for regular media, which is an actual terminal-to-terminal call, in the connection response message, thereby causing the originating terminal to be configured as a counterpart terminal after processing initial media. A packet communication network based multimedia ring back tone service method comprising preparing for regular media processing with a called terminal. The method of claim 13, After the call setup process between the calling terminal and the called terminal is finished, the initial media provided to the calling terminal is exchanged with regular media corresponding to an actual call. Early media of the multimedia call ring tone transmitted to the calling terminal is terminated, and thereafter, a real call path (Regular Media) is formed between the calling terminal and the called terminal. Service method.

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