KR100646398B1 - Method and system for providing multimedia ringback tone service - Google Patents

Abstract

The present invention relates to a method and system for providing a multimedia ringback tone service.

The present invention uses a home location register (HLR) that stores profile information including whether a subscriber subscribes to a ringback tone service, and a sound source providing server that stores a ringback tone sound source. A method for providing a multimedia ringback tone service in which a called subscriber plays a ringback tone sound previously set in the sound source providing server when a call is made, the method comprising: (a) receiving a call request from a caller terminal; (b) requesting the originating signal to an originating exchange; (c) receiving a request for setting a vocoder for the multimedia codec if the called terminal is subscribed to the ringback tone service; (d) receiving a selected ringback tone sound source from the calling exchange using the multimedia codec information supported by the calling terminal; (e) encoding the received ringback tone sound source with the multimedia codec; And (f) transmitting the encoded ringback tone sound source to the originating terminal.

Ringback Tone, Switchboard, Terminal, Multimedia Codec, Routing, Vocoder

Description

Method and System for Providing Multimedia Ring Back Tone Service

1 is a block diagram schematically illustrating a system for providing a multimedia ringback tone service according to an embodiment of the present invention;

2 is a conceptual diagram schematically illustrating a process of providing a multimedia ringback tone service according to an embodiment of the present invention;

3A and 3B are detailed views illustrating a process of providing a multimedia ringback tone service according to an embodiment of the present invention;

4 is a flowchart illustrating a ringback tone service subscription procedure according to an embodiment of the present invention;

5 is a diagram illustrating a procedure for changing and adding a ringback tone sound source using a multimedia codec in a ringback tone service according to an exemplary embodiment of the present invention.

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

100: calling terminal 102: base station

104: base station controller 106: originating exchange

108: No.7 net 110: HLR

112: destination exchange 114, 124 gateway

116: sound source providing server 118: the Internet

120: sound source providing control server 122: subscriber DB

126: web server

The present invention relates to a method and system for providing a multimedia ringback tone service. More specifically, when the caller terminal supports a multimedia codec capable of improving the quality of music in addition to a voice-only codec such as EVRC (Enhanced Variable Rate Codec), the mobile communication system can change the vocoder so that the high quality music during the ringback tone period can be achieved. The present invention relates to a method and system for providing a multimedia ringback tone service for providing a high quality ringback tone service by presenting a method for operating a multimedia codec for voice call and an audio codec such as EVRC during a voice call.

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 addition, while providing a text message service to complement the voice call service, a wireless Internet service has recently emerged 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.

As a result of the development of mobile communication technology, a service provided by a code division multiple access (CDMA) mobile communication system transmits data such as circuit data and packet data as well as voice service. It is developing into a multimedia communication service.

In recent years, with the development of information and communication, IMT-2000 (International Mobile Telecommunication 2000), a third generation mobile communication system that has been standardized by ITU-R (for example, CDMA2000 1X, 3X, EV-DO, WCDMA (WideBand CDMA)) Etc.) are commercially available. Recently, the IS-95C network, which has evolved from the existing IS-95A and IS-95B networks, transmits up to 307.2 Kbps, which is much faster than the 14.4 Kbps or 56 Kbps data rate that can be supported in the IS-95A and IS-95B networks. It offers wireless internet at speed. In particular, by using IMT-2000 service, it is possible to provide various multimedia services (AOD, VOD, etc.) at higher speed as well as improving existing voice and WAP service quality.

On the other hand, in recent years, a ring back tone (RBT) service or so-called coloring RBT (CRBT: Coloring RBT), 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 ringback tone service provides the caller with the ringback tone specified by the called party. The ringback tone service is used to listen to the sound of birds, water, etc., as well as the latest songs or pop songs, instead of the mechanical call waiting sound generated during the existing call, for example, "following". In addition, it is a service that enables you to use your own prerecorded voice as ringback tone.

As the ringback tone service is provided, the other party can feel auditory satisfaction by listening to the sound of a sound source designated by the called party instead of listening to a uniform mechanical ringback tone.

On the other hand, most mobile communication terminals use a voice codec having a variable data rate such as EVRC for efficiency of a voice call and optimization of a wireless channel. Here, EVRC is a method of encoding voice information variably according to the amount of information of a voice. In the silent period where a caller does not speak, voice encoding is performed at a low rate of information, and when there is a large amount of information, encoding is performed at high speed. This EVRC can be seen as an efficient method compared to the previous method of always encoding at a constant rate. By using this, the system capacity of a code division multiple access (CDMA) mobile communication system is increased, and power consumption can be saved at the same time.

However, such a voice codec having a variable bit rate such as EVRC has a problem in that music quality is degraded due to a variable bit rate coding error for music such as a background sound having almost no silent section. To overcome this, music service providers are actually trying to minimize sound damage by voice codec by extracting the sound source and modifying the sound source to match the EVRC. This sound source correction is performed by preprocessing processing or sound considering the characteristics of EVRC. Rely on the manual work of a technician.

However, these works can complement the quality of the music service through the EVRC to a level equivalent to the voice quality, but there is a problem that it is difficult to improve the quality of the music service itself. Due to these problems, most of the high quality music services currently in service use high quality multimedia codecs separately, and provide music using data channels instead of voice channels. However, most of these commercialized multimedia service codecs require a transmission speed of 16K or more, and in order to satisfy the transmission speed, a download service or a real-time multimedia service is provided using a data communication channel.

Therefore, if the music service using the multimedia codec is used for the ringback tone service, the sound quality can be expected to be improved, but the data rate problem in the voice call channel required for the multimedia voice transmission can be solved by applying various multimedia codec standards. It is expected that there will be a service for this. In addition, since the application of the multimedia codec to the ringback tone service will be performed in the mobile communication terminal and the system in order to provide a higher quality ringback tone service, it is necessary to derive a service providing method.

In order to solve the above problems, the present invention, when the caller terminal supports a multimedia codec that can improve the quality of music in addition to the voice-only codec such as EVRC (Enhanced Variable Rate Codec), ring by changing the vocoder in the mobile communication system To provide high quality ringback tone service by applying multimedia codec in mobile communication system by suggesting the way to operate multimedia codec for high quality music during back tone period and voice codec like EVRC during voice call. An object of the present invention is to provide a multimedia ringback tone service.

According to a first object of the present invention, a home location register (HLR: home location register) storing profile information including whether a subscriber subscribes to a ringback tone service and a sound source providing server storing a ringback tone sound source are provided. A method for providing a multimedia ringback tone service in which, when a calling subscriber calls a called subscriber, a ringback tone sound which is set in advance by the called subscriber to the sound source providing server is played by the calling terminal, the method comprising: (a) a call request from the calling terminal; Receiving; (b) requesting the originating signal to an originating exchange; (c) receiving a request for setting a vocoder for the multimedia codec if the called terminal is subscribed to the ringback tone service; (d) receiving a selected ringback tone sound source from the calling exchange using the multimedia codec information supported by the calling terminal; (e) encoding the received ringback tone sound source with the multimedia codec; And (f) transmitting the encoded ringback tone sound source to the calling terminal.

According to a second object of the present invention, by using a home location register (HLR: home location register) storing profile information including whether a subscriber subscribes to a ringback tone service and a ringback tone sound source providing server, Claims [1] A method for providing a multimedia ringback tone service using an originating exchange and an originating vocoder, wherein when a calling subscriber calls a called subscriber, a ringback tone source preset by the called subscriber on the sound source providing server is played by the calling terminal. (a) when the calling terminal attempts to connect to the called terminal, receiving location information of the called terminal, whether the called terminal subscribes to the ringback tone service, and multimedia codec information supported by the calling terminal from the home location register; step; (b) if the called terminal is subscribed to the ringback tone service, determining whether a calling vocoder can encode a sound source with the multimedia codec; (c) if the calling vocoder can encode the sound source with the multimedia codec, transmitting an ISUP (ISDN User Part) call connection request message including the multimedia codec information to the sound source providing server; (d) requesting the calling vocoder to set a vocoder for the multimedia codec and requesting the calling terminal to change the vocoder for the multimedia codec to activate a routing path for the ringback tone service; And (e) receiving the selected ringback tone sound source using the multimedia codec information from the sound source providing server and transmitting the ringback tone sound source to the calling side vocoder. Provide a way to provide services.

According to a third object of the present invention, a home location register (HLR: home location register) storing profile information including whether a subscriber subscribes to a ringback tone service and a sound source providing server storing a ringback tone sound source are provided. Claims [1] A method for providing a multimedia ringback tone service using a called side exchange and a calling side vocoder in which a ringing tone tone, which is set in advance by the called party in the sound source providing server, is played by the calling terminal when the calling subscriber calls the called subscriber. (a) when the calling terminal attempts to connect to the called terminal, receiving an ISUP (ISDN User Part) call connection request message including the multimedia codec information from the calling exchange; (b) determining whether a calling vocoder can encode a sound source with the multimedia codec; (c) if the calling vocoder can encode the sound source with the multimedia codec, transmitting the ISUP call connection request message including the multimedia codec information to the sound source providing server; (d) requesting the originating exchange to set the multimedia codec to activate a routing path for the ringback tone service; And (e) receiving the selected ringback tone sound source using the multimedia codec information from the sound source providing server and transmitting the ringback tone sound source to the calling side exchange to the calling side exchange. Provide a way to provide services.

According to a fourth object of the present invention, when a calling subscriber calls a called subscriber, a ringback tone service using a calling exchange is provided such that the called subscriber plays a ringback tone sound previously set in the sound source providing server. A system comprising: a home location register (HLR) storing profile information including whether a subscriber subscribes to a ringback tone service and multimedia codec information supported by a subscriber station; When the calling terminal attempts to connect to the called terminal, the receiving terminal receives the ring back tone service from the home location register and receives multimedia codec information supported by the calling terminal. Is subscribed to and the source vocoder can encode a sound source with the multimedia codec, transmits an IDN (ISDN User Part) call connection request message including the multimedia codec information to a sound source providing server, and transmits the ring from the sound source providing server. An originating exchange that receives a backtone sound source and requests vocoder setting for the multimedia codec to the calling vocoder; And a calling side vocoder for encoding the ringback tone sound source with the multimedia codec and transmitting the ringback tone source to the calling terminal when receiving the vocoder setting request from the calling side exchange. Provides a system that provides ringback tone service.

According to a fifth object of the present invention, when a calling party calls a called party, the called party switch and the calling vocoder allow the called party to play the ringback tone sound set in advance in the sound source providing server. A system for providing a ringback tone service, comprising: a home location register (HLR) storing profile information including whether a subscriber subscribes to a ringback tone service and multimedia codec information supported by a subscriber station; When the calling terminal attempts to connect to the called terminal, an ISUP (ISDN User Part) call connection request message including the multimedia codec information is received from the calling exchange, and the calling vocoder may encode a sound source into the multimedia codec. If present, transmits an ISUP (ISDN User Part) call connection request message including the multimedia codec information to a sound source providing server, receives the ringback tone sound source from the sound source providing server, and sets the vocoder setting for the multimedia codec to the calling side vocoder. Requesting destination exchange; And a calling side vocoder for encoding the ringback tone sound source with the multimedia codec and transmitting it to the calling terminal when receiving the vocoder setting request from the called side exchange. Provides a system that provides ringback tone service.

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 schematically illustrating a system for providing a multimedia ringback tone service according to a preferred embodiment of the present invention.

As shown in FIG. 1, a system for providing a multimedia ringback tone service according to a preferred embodiment of the present invention includes an originating terminal 100, a base transceiver station (BTS) 102, and a base station controller (BSC). Controller (104), originating exchange 106, No.7 network 108, Home Location Register (HLR) 110, destination exchange 112, Gateways 114, 124 ), A sound source providing server 116, the Internet 118, a sound source providing control server 120, a subscriber database 122, a web server 124, and the like.

The connection of each component is outlined as follows. The home location register (110) has information about the subscriber and is the source side exchange (106) and the destination side exchange (112) via the NO.7 network (108) based on a signaling transfer protocol (STP). Communicate with Here, the source exchanger 106 and the destination exchanger 112 are connected to the sound source providing server 116 that stores the sound source through the gateway 114 equipment. In addition, the source exchange 106 and the destination exchange 112 are connected with the base station controller 104 to support access for mobile communication. The base station 102 communicates with the user terminal, and the base station controller 104 is responsible for resource allocation and vocoder control for the voice call channel. Meanwhile, the sound source providing server 116 is connected to the subscriber database 122 and the sound source providing control server 120 through the Internet 118.

Hereinafter, the main components according to the preferred embodiment of the present invention will be described in more detail.

The originating terminal 100 according to the preferred embodiment of the present invention is a terminal 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 originating terminal 100 according to the preferred embodiment of the present invention supports H.245 for call control, H.245 for call setup and call signaling, audio codec and video codec. That is, the terminal may receive a music service through a voice call channel using a multimedia codec other than EVRC (Enhanced Variable Rate Codec) for voice call. Therefore, when the caller terminal 100 according to the preferred embodiment of the present invention receives the ringback tone sound source, the calling terminal 100 plays the multimedia codec according to the sound source.

Here, an example of a multimedia codec may be an AAC (Advanced Audio Coding) codec, which is used for music distribution services using the Internet as a voice compression method, and is generally used for MP3 and Adaptive Transform Acoustic Coding 3 (ATRAC3). have. AAC has a higher compression rate than MP3, but the sound quality is slightly lower, so it is suitable for music distribution using personal mobile communication (telephone).

The base station 102 according to the preferred embodiment of the present invention is a network endpoint device that directly interworks with a terminal by performing baseband signal processing, wired / wireless conversion, and transmission and reception of a wireless signal. The base station 102 receives a call attempt from the calling terminal 100 to a called terminal (not shown) through a traffic channel among the signal channels, and transmits the received call attempt to the calling base station controller 104.

The base station controller 104 according to the preferred embodiment of the present invention controls the base station 102, and assigns and releases radio channels for the terminal, controls the transmission output of the terminal and the base station 102, and soft handoff between cells. And hard handoff determination, transcoding and vocoding, global positioning system (GPS) clock distribution, and operation and maintenance of the base station 102.

In particular, when a vocoder (not shown) located in the base station controller 104 receives a vocoder setting request from the source exchange 106 or the destination exchange 112, the ringback tone source is encoded by the multimedia codec to the calling terminal 100. send. To this end, the base station controller 104 provides a multimedia codec using its own hardware or software.

The switchboards 106 and 112 according to the preferred embodiment of the present invention perform a switching function for the call request of the originating terminal 100 and the control function to enable the mobile communication network to operate efficiently. That is, basic and additional service processing of the terminal, incoming and outgoing call processing of the subscriber, location registration and handoff procedure processing, interworking with other networks, and the like. The exchanges 106 and 112 of the IS-95 A / B / C system include an access switching subsystem (ASS) that performs distributed call processing, an INS (interconnection network subsystem) that performs centralized call processing, operation and Subsystems such as Central Control Subsystem (CCS), which is responsible for the centralization of maintenance, and Location Registration Subsystem (LRS), which perform storage and management of information on mobile subscribers. In addition, the switch (106, 112) for the third and fourth generation may include an Asynchronous Transfer Mode (ATM) switch (not shown), which increases the transmission rate and the efficiency of line use by the packet transmission per cell. Let's do it.

When the calling terminal 100 attempts to connect a call to a called terminal (not shown) according to a preferred embodiment of the present invention, the ringback tone of the called terminal (not shown) from the home location register 110 is determined. Receives the service code and multimedia codec information supported by the calling terminal 100. At this time, when the preferred embodiment of the present invention is mainly directed to the source exchange 106, if the destination terminal (not shown) is subscribed to the ringback tone service and the source vocoder can encode the sound source with the multimedia codec, the source exchange 106 transmits an IDN (ISDN User Part) call connection request message including multimedia codec information to the sound source providing server 116, receives the multimedia ringback tone sound source from the sound source providing server 116, and sets the vocoder for the multimedia codec. To the calling vocoder.

To this end, the switch (106, 112) according to a preferred embodiment of the present invention communicates with the home location register 110 at the time of registering the subscriber to the ringback tone service subscription information and routing to the sound source providing server 116 Save the information.

On the other hand, when the preferred embodiment of the present invention proceeds mainly to the originating exchange 106, the originating exchange 106 transmits the ISUP call connection request message to the sound source providing server 116, and then the multimedia to the originating terminal 100. Request a codec setting to activate the routing path for the ringback tone service.

On the other hand, when a call is received by a called terminal (not shown), the called side exchange 112 sends a call incoming signal and a codec setting change request signal for a voice call of the called terminal (not shown). To send. When the preferred embodiment of the present invention proceeds mainly from the source exchange 106, when the source exchange 106 receives such an incoming call signal, it releases the ISUP call connection with the sound source providing server 116, and also changes the codec setting. Upon receiving the request signal, the calling base station 102 and the calling terminal 100 request a codec setting change to the voice codec to enable a voice call.

The Home Location Register (HLR) 110 according to a preferred embodiment of the present invention performs functions such as registration recognition, registration deletion, and location confirmation of the terminal. In addition, the home location register 110 stores profile information including whether the subscriber subscribes to a ringback tone service, information for routing to the sound source providing server 116, and multimedia codec information supported by the subscriber station. The multimedia codec information supported by the subscriber station is set and stored as additional service subscription information of the calling party profile.

On the other hand, when the preferred embodiment of the present invention proceeds mainly to the destination side exchange 106, the destination side exchange 112, when the originating terminal 100 attempts to connect to the destination terminal (not shown), the originating side exchange 106 Receives an ISUP (ISDN User Part) call connection request message including multimedia codec information from the If the calling vocoder can encode the sound source with the multimedia codec, the destination exchange 112 transmits the received ISUP call connection request message to the sound source providing server 116, and the ringback tone sound source from the sound source providing server 116. Receives a request for vocoder setup for the multimedia codec from the calling vocoder.

On the other hand, the destination exchange 106 transmits the ISUP call connection request message to the sound source providing server 116, and requests the calling terminal 100 to set the multimedia codec to activate the routing path for the ringback tone service.

On the other hand, when a call is received by a called terminal (not shown), the called side exchange 112 sends a call incoming signal and a codec setting change request signal for a voice call of the called terminal (not shown). And the ISUP call connection with the sound source providing server 116 is released. When the source exchanger 106 receives the codec setting change request signal, the source exchange 106 requests the source base station 102 and the calling terminal 100 to change the codec setting to the voice codec to enable voice communication.

The sound source providing server 116 according to the preferred embodiment of the present invention stores a ringback tone sound source that does not degrade the quality of the multimedia codec, so that the ISUP call is connected from the source exchange 106 or the destination exchange 112. Upon receiving the request message, the selected ringback tone source is transmitted to the calling side exchange 106 or the called side exchange 112 using the multimedia codec information included in the ISUP call connection request message. The sound source providing server 116 stores various sound sources according to codec types applicable to the user terminal, and the sound source providing server 116 is connected to the switchboards 106 and 112 via the gateway 114, and the switchboard 106, A sound source suitable for the type of codec required in 112) is provided.

In addition, the sound source providing server 116 according to the preferred embodiment of the present invention generates a sound source code request signal including the multimedia codec information received from the source exchange 106 or the destination exchange 112 to provide a sound source providing control server And transmits the retrieved ringback tone sound source to the calling side exchange 106 or the called side exchange 112 using the ring back tone sound source code received from the sound source providing control server 120. Here, the sound source code request signal includes multimedia codec information, called terminal (not shown) identification information, calling terminal 100 identification information, call request time zone information, and the like.

The sound source providing control server 120 according to the preferred embodiment of the present invention communicates with the sound source providing server 116 via the Internet network 118 to transmit a sound source code request signal including multimedia codec information from the sound source providing server 116. If received, the ringback tone source code convertible to the multimedia codec is searched and transmitted to the sound source providing server 116. Here, the ringback tone source code stored in the sound source providing control server 120 may be stored separately according to a multimedia codec, a specific caller, a caller group, and a call time zone.

Web server 126 according to a preferred embodiment of the present invention is connected to the sound source providing server 116 or the sound source providing control server 120 through the Internet network 118, the sound source to be stored in the sound source providing server 116 It provides a wired or wireless web page for adding or changing the sound source providing control server 120 to change the information for specifying the sound source and the corresponding ringback tone sound source code. The information for specifying the sound source may be specific caller information, caller group information, or call time zone.

2 is a conceptual diagram schematically illustrating a process of providing a multimedia ringback tone service according to an exemplary embodiment of the present invention.

When the originating terminal 100 having the multimedia codec requests a call origination from the base station 102 / base station controller 104 (S200), the base station 102 / base station controller 104 calls the originating exchange 106. The originating request is forwarded (S202).

The calling side exchange 106 makes a call connection request to the called side exchange 112 (S204), and simultaneously transmits a ringback tone service request to the sound source providing server 116 (S206). As described above, the sound source providing server 116 stores the ringback tone sound source so as not to degrade the quality of the multimedia codec, and transmits the ringback tone sound source to the caller terminal 100 through the call exchanger 106. (S208). At this time, the vocoder located in the base station controller 104 on the calling side encodes the received ringback tone sound source with a multimedia codec and transmits it to the calling terminal 100.

The calling terminal 100 plays the received ringback tone sound source using a multimedia codec. Then, when a call is made by a called terminal (not shown) (S210), the called side switch 112 notifies the caller of the call to the calling party (S212). The originating exchange 106, which has received the incoming call signal from the called party, requests the sound source providing server 116 to release the ring back tone (S214), and the vocoder of the base station controller 104 and the voice codec of the calling terminal 100 are connected. Control to enable voice calls.

2 shows a ringback tone service centered on the calling side exchange 106, but in the present invention, a ringback tone service centered on the called side exchange 112 may also be implemented.

That is, in the ringback tone service centered on the destination side exchange 112, the destination side exchange 112, when the originating terminal 100 tries to make a call to the destination terminal (not shown), receives multimedia codec information from the originating exchange 106. Receives ISUP (ISDN User Part) call connection request message. If the calling vocoder can encode the sound source with the multimedia codec, the destination exchange 112 transmits the received ISUP call connection request message to the sound source providing server 116, and the ringback tone sound source from the sound source providing server 116. Receives a request for vocoder setup for the multimedia codec from the calling vocoder. On the other hand, the destination exchange 106 transmits the ISUP call connection request message to the sound source providing server 116, and requests the calling terminal 100 to set the multimedia codec to activate the routing path for the ringback tone service. In addition, when a call is received by a called terminal (not shown), the called side exchange 112 transmits a call incoming signal and a codec setting change request signal for a voice call of the called terminal (not shown). And the ISUP call connection with the sound source providing server 116 is released. The other process is performed in the same way as the ringback tone service centering on the calling exchange 106.

3A and 3B are detailed views illustrating a process of providing a multimedia ringback tone service according to an exemplary embodiment of the present invention.

When the calling terminal 100 attempts to connect a call to a called terminal (not shown), the calling side exchange 106 performs channel allocation and vocoder allocation along with radio resource allocation to the base station controller 104 (S300).

When the calling party wireless call setup is completed, the calling party switch 106 requests the home location register 110 for location information of the called terminal (not shown) (S302). The home location register 110 requests routing information to the destination side exchange 112 where the called terminal (not shown) is located, and the destination side exchange 112 transmits a response message to the home location register 110 (S304). . In addition, the home location register 110 performs a location information response of the called terminal (not shown) to the source exchange 106 (S306). At this time, the source exchange 106 also receives information on whether to subscribe to a ringback tone service for the called terminal (not shown) and the multimedia codec supported by the calling terminal 100.

The source exchange 106 transmits an ISUP call connection request message to the destination side exchange 112 to inform that there is a call request to the called terminal (not shown) using the IAM message (S308). Here, the ISUP call connection request message includes information on the multimedia codec supported by the calling terminal 100.

The calling exchange 106 detects whether the called terminal (not shown) subscribes to the ringback tone service, and if the called terminal (not shown) is subscribed to the ringback tone service, the calling side vocoder can encode the sound source into the multimedia codec. Determine whether or not. Here, if it is determined that the calling vocoder can encode the sound source with the multimedia codec, the multimedia codec for the ringback tone service is determined (S309), and an ISUP (ISDN User Part) call connection request message including the multimedia codec information is provided. Using the routing data is transmitted to the sound source providing server 116 (S310).

The called side exchange 112 notifies the called terminal (not shown) of the incoming signal by performing paging for the called terminal (not shown) (S311).

On the other hand, the sound source providing server 116 requests the ringback tone service sound source code set by the called party to the sound source providing control server 120 (S312), and the sound source providing control server 120 sets the sound source code set by the called party. Notify the sound source providing server 116 (S314). In this process, the multimedia codec information of the calling terminal 100 is used, and the ringback tone sound source available as the multimedia codec of the calling terminal 100 is selected and transmitted to the sound source providing server 116. For example, when the sound source providing server 116 determines the sound source selection according to the multimedia codec of the calling terminal 100, the sound source code received from the sound source providing control server 120 is commonly used and then the calling terminal 100 is used. A method of completing a sound source code by adding a kind of codec may be used. Alternatively, when the sound source providing control server 120 is responsible for the selection of the sound source, the sound source providing server 116 adds and transmits the multimedia codec information of the calling terminal 100 when the sound source code is requested and transmits the sound source providing server 116. ) May generate a code by combining the sound source setting information and the codec information of the subscriber.

The calling side exchange 106 requests the calling side vocoder to set the vocoder for the ringback tone service when the multimedia codec other than the voice codec is used for the ringback tone service, and also provides the ringback tone service to the calling terminal 100. Request a vocoder change and receive a response (S316, S318) to activate the routing path for the ringback tone.

The ringback tone sound source is controlled by the terminating terminal 112, the originating side exchange 106, the originating base station controller 104, and the base station 102 at the sound source providing server 116 until a call is made by the terminating terminal (not shown). It is transmitted to the calling terminal 100 through (S320). In this process, the ringback tone source received from the source exchange 106 is encoded by the source vocoder into the multimedia codec, and the encoded source is transmitted to the source terminal 100 and reproduced.

When a call is received by a called terminal (not shown), the called side exchange 112 performs a normal codec operation for a voice call of the called terminal (not shown) together with a call incoming signal informing of the incoming call. Request the codec setting change request signal to the source exchange 106 (S322, S324, S326). When the originating exchange 106 receives this call terminating signal, it terminates the ringback tone service through the release of the ISUP call connection with the sound source providing server 116 (S328). In addition, when the originating exchange 106 receives the codec setting change request signal, the calling side exchange 106 requests the base station controller 104 to change the codec setting to the voice codec to enable normal communication (S330).

3A and 3B illustrate a ringback tone service centered on an originating exchange 106, but in the present invention, a ringback tone service centered on a destination side exchange 112 may also be implemented.

That is, in the ringback tone service centered on the destination side exchange 112, the destination side exchange 112, when the originating terminal 100 tries to make a call to the destination terminal (not shown), receives multimedia codec information from the originating exchange 106. Receives ISUP (ISDN User Part) call connection request message. If the calling vocoder can encode the sound source with the multimedia codec, the destination exchange 112 transmits the received ISUP call connection request message to the sound source providing server 116, and the ringback tone sound source from the sound source providing server 116. Receives a request for vocoder setup for the multimedia codec from the calling vocoder. On the other hand, the destination exchange 106 transmits the ISUP call connection request message to the sound source providing server 116, and requests the calling terminal 100 to set the multimedia codec to activate the routing path for the ringback tone service. In addition, when a call is received by a called terminal (not shown), the called side exchange 112 transmits a call incoming signal and a codec setting change request signal for a voice call of the called terminal (not shown). And the ISUP call connection with the sound source providing server 116 is released. The other process is performed in the same way as the ringback tone service centering on the calling exchange 106.

4 is a flowchart illustrating a ringback tone service subscription procedure according to a preferred embodiment of the present invention.

When the called subscriber who wants to use the ringback tone service according to the preferred embodiment of the present invention applies to the service provider to which he belongs, the service provider registers the service in the subscriber database 122 (S400) and the subscriber database 122 is the home location. Service registration is performed with the register 110 (S402).

The home location register 110 sets corresponding information in an internal database (not shown), and also generates identification information for identifying which multimedia codec is available when the terminal receives the ringback tone service ( S404). This identification information may be extracted from subscriber terminal information previously registered in the home location register 110.

Meanwhile, the new subscriber information stored in the subscriber database 122 is transferred to the sound source providing server 116 (S406), and the sound source providing server 116 and the sound source providing control server 120 set a specific sound source code for this. (S408).

When the location registration request occurs from the corresponding exchange that is currently in the mobile service (S410), the home location register 110 determines whether the terminal is a terminal subscribed to the ringback tone service (S412). The service setting information, the routing information capable of setting the call to the sound source providing server 116, the subscriber terminal information, and the like are transmitted to the exchange. The exchange receiving the information from the home location register 110 sets the ringback tone related information (service subscription status, routing information, mobile terminal information, etc.) transmitted to the corresponding subscriber database.

5 is a diagram illustrating a procedure for changing and adding a ringback tone sound source using a multimedia codec in a ringback tone service according to an exemplary embodiment of the present invention.

When the subscriber subscribed to the ringback tone service accesses the designated web server 126 using a personal PC or the like, the web server 126 provides a screen for changing and adding a service. When the subscriber requests to change the ringback tone sound source by inputting his / her phone number and selecting one of the ringback tone sound sources already secured by the sound source providing server 116 (S500), the web server 126 may provide a sound source control control server ( 120, the sound source change request is made (S502), and the sound source providing control server 120 releases the sound source code previously established in association with the subscriber based on the request, and stores the code of the selected sound source afterwards. The selected sound source can be used in the ringback tone service (S504).

When the subscriber selects a sound source through a web page and then attaches a phone number and a specific file such as a guide sound or music and requests the sound source to be added through the web server 126 (S506), the web server 126 causes the sound source to be added. Request to add the sound source to the providing server 116 (S507) and the sound source providing server 116 secures the attached file as an additional sound (S508) and associates the additional sound source code with the subscriber (S510). Here, a file such as a guide sound or music used when adding a sound source may be a file encoded by a subscriber for a multimedia codec or an original sound. In the case of the original sound, it is preferable to be processed to support various multimedia codecs through a separate encoding procedure before being stored in the sound source providing server 116.

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, a multimedia codec for high quality music can be operated during a ringback tone period by utilizing various kinds of multimedia codecs in a ringback tone service, and a voice codec such as EVRC can be operated during a voice call. By presenting the plan, it is effective to provide high quality ringback tone service.

On the other hand, mobile carriers can improve the quality of the ringback tone service currently in service, which can generate new profits in terms of additional charges for the improved service, and improve the mobile service satisfaction of customers. have.

Claims (42)

When the calling subscriber calls the called subscriber by using a home location register (HLR) that stores profile information including whether the subscriber subscribes to the ringback tone service and a music providing server that stores the ringback tone sound source, A method for providing a multimedia ringback tone service for a ringing tone sound source preset by a called subscriber to a sound source providing server to be played by a calling terminal, (a) receiving a call request from an originating terminal; (b) requesting the originating signal to an originating exchange; (c) receiving a request for setting a vocoder for the multimedia codec if the called terminal is subscribed to the ringback tone service; (d) receiving a selected ringback tone sound source from the calling exchange using the multimedia codec information supported by the calling terminal; (e) encoding the received ringback tone sound source with the multimedia codec; (f) transmitting the encoded ringback tone sound source to the calling terminal; And (g) receiving a codec setting change signal to a voice codec from the calling exchange when a call is received; Including a call, when the call is made, the calling exchange exchanges the call ringing signal and the codec setting change request signal for the voice call of the called terminal from the called side switch to the multimedia ring back tone service How to give. delete delete The method of claim 1, And the calling exchange exchange releases an ISUP call connection with the sound source providing server when the call exchange signal is received. The method of claim 1, And the terminating side exchange releases an ISUP call connection with the sound source providing server when the terminating signal is transmitted. The method of claim 1, The ringback tone sound source is a method for providing a multimedia ringback tone service, characterized in that the source exchange server transmits and receives an ISUP (ISDN User Part) call connection request message including the multimedia codec information to the sound source providing server. The method of claim 1, The ring back tone sound source is a method for providing a multimedia ring back tone service, characterized in that the destination exchange transmits and receives an ISUP (ISDN User Part) call connection request message including the multimedia codec information to the sound source providing server. The method of claim 1, The sound source providing server is a method for providing a multimedia ring back tone service, characterized in that the various sound sources are stored for each type of multimedia codec. The method of claim 1, The sound source providing server transmits a sound source code request signal including the multimedia codec information received from the calling side exchange or the called side exchange to a sound source providing control server, and uses the ringback tone sound source code received from the sound source providing control server. And providing the ringback tone sound source to the calling side exchange or the called side exchange. The method of claim 9, The sound source code request signal includes the multimedia codec information, the called terminal identification information, the calling terminal identification information and / or the call request time zone information. The method of claim 9, And the ringback tone sound source code stored in the sound source providing control server is classified and stored according to the multimedia codec, a specific caller, a caller group, and / or a calling time zone. The method of claim 1, And the calling terminal plays the received ringback tone sound source using the multimedia codec. The method of claim 1, The home location register provides a multimedia ring back tone service, characterized in that for storing the multimedia codec information supported by the terminal for each terminal subscribed to the multimedia ring back tone service. When the calling subscriber calls the called subscriber by using a home location register (HLR) that stores profile information including whether the subscriber subscribes to the ringback tone service and a music providing server that stores the ringback tone sound source, A method for providing a multimedia ringback tone service using a calling party exchange and a calling vocoder to allow a called subscriber to play a ringback tone source previously set in the sound source providing server, by a calling terminal, (a) when the calling terminal attempts to connect to the called terminal, receiving location information of the called terminal, whether the called terminal subscribes to the ringback tone service, and multimedia codec information supported by the calling terminal from the home location register; step; (b) if the called terminal is subscribed to the ringback tone service, determining whether a calling vocoder can encode a sound source with the multimedia codec; (c) if the calling vocoder can encode the sound source with the multimedia codec, transmitting an ISUP (ISDN User Part) call connection request message including the multimedia codec information to the sound source providing server; (d) requesting the calling vocoder to set a vocoder for the multimedia codec and requesting the calling terminal to change the vocoder for the multimedia codec to activate a routing path for the ringback tone service; (e) receiving the selected ringback tone sound source using the multimedia codec information from the sound source providing server and transmitting the ringback tone sound source to the calling side vocoder; (f) receiving a call incoming signal and a codec setting change signal to a voice codec for a voice call of the called terminal from a called side exchange when a call is received; (g) upon receiving the call incoming signal, releasing an ISUP call connection with the sound source providing server; And (h) when the codec setting change request signal is received, requesting the calling vocoder to change the codec setting to the voice codec; Method for providing a multimedia ring back tone service using the calling side switch and the calling side vocoder comprising a. delete When the calling subscriber calls the called subscriber by using a home location register (HLR) that stores profile information including whether the subscriber subscribes to the ringback tone service and a music providing server that stores the ringback tone sound source, A method for providing a multimedia ringback tone service using a called party exchanger and a calling party vocoder to allow a called party to play a ringback tone source previously set in the sound source providing server by a calling terminal, (a) when the calling terminal attempts to connect to the called terminal, receiving an ISUP (ISDN User Part) call connection request message including the multimedia codec information from the calling exchange; (b) determining whether the calling vocoder can encode a sound source with the multimedia codec; (c) if the calling vocoder can encode the sound source with the multimedia codec, transmitting the ISUP call connection request message including the multimedia codec information to the sound source providing server; (d) requesting the originating exchange to set the multimedia codec to activate a routing path for the ringback tone service; (e) receiving the selected ringback tone sound source using the multimedia codec information from the sound source providing server and transmitting the ringback tone sound source to the calling exchange; And (f) when a call is received, transmitting a call incoming signal and a codec setting change signal to a voice codec for a voice call of the called terminal to the calling exchange, and releasing an ISUP call connection with the sound source providing server. step Wherein, when the source exchange receives the codec setting change request signal, the source exchange requesting the source vocoder to change the codec setting to the voice codec, characterized in that the destination exchange and the source vocoder Method of providing a multimedia ringback tone service using the. delete delete The method of claim 16, When the calling terminal attempts to connect to the called terminal, the home location register transmits the location information of the called terminal and the multimedia codec information supported by the calling terminal to the calling side exchange. And providing a multimedia ringback tone service using an originating vocoder. The method of claim 16, In step (d), When the called exchange requests the originating exchange to set the multimedia codec, the calling exchange requests the calling vocoder to set the vocoder for the multimedia codec, and the calling terminal requests the vocoder for the multimedia codec. Requesting a change activates a routing path for the ringback tone service, and the originating side vocoder encodes the received ringback tone sound source into the multimedia codec and transmits it to the calling terminal. A method for providing a multimedia ringback tone service using vocoder. The method according to claim 14 or 16, The sound source providing server is a method for providing a multimedia ring back tone service, characterized in that the various sound sources are stored for each type of multimedia codec. The method according to claim 14 or 16, The sound source providing server transmits a sound source code request signal including the multimedia codec information received from the calling side exchange or the called side exchange to a sound source providing control server, and transmits a ringback tone sound source code received from the sound source providing control server. And providing the ringback tone sound source to the calling side exchange or the called side exchange. The method of claim 22, The sound source code request signal includes the multimedia codec information, the called terminal identification information, the calling terminal identification information and / or the call request time zone information. The method of claim 22, And the ringback tone sound source code stored in the sound source providing control server is classified and stored according to the multimedia codec, a specific caller, a caller group, and / or a calling time zone. The method according to claim 14 or 16, And the calling terminal plays the received ringback tone sound source using the multimedia codec. The method according to claim 14 or 16, The home location register provides a multimedia ring back tone service, characterized in that for storing the multimedia codec information supported by the terminal for each terminal subscribed to the multimedia ring back tone service. In a system for providing a multimedia ringback tone service using the calling exchange, when the calling subscriber calls the called subscriber, the ringback tone source preset by the called subscriber in the sound source providing server is played by the calling terminal. A home location register (HLR) storing profile information including whether a subscriber subscribes to a ringback tone service and multimedia codec information supported by a subscriber station; When the calling terminal attempts to connect to the called terminal, the receiving terminal receives the ring back tone service from the home location register and receives multimedia codec information supported by the calling terminal. Is subscribed to and the source vocoder can encode a sound source with the multimedia codec, transmits an IDN (ISDN User Part) call connection request message including the multimedia codec information to a sound source providing server, and transmits the ring from the sound source providing server. An originating exchange that receives a backtone sound source and requests vocoder setting for the multimedia codec to the calling vocoder; And When the vocoder setting is requested from the calling exchange, the calling vocoder for encoding the ringback tone source with the multimedia codec and transmitting the encoded CODEC to the calling terminal. Including, but when the call is made by the called terminal, the called side exchange transmits a call incoming signal and a codec setting change request signal for the voice call of the called terminal to the calling side exchange, and the calling side exchange And when the codec setting change request signal is received, requests the source side vocoder to change the codec setting to the voice codec. The method of claim 27, The originating exchange exchanges the ISUP call connection request message to the sound source providing server, and then requests the originating terminal to set the multimedia codec to activate a routing path for the ringback tone service. And a system for providing a multimedia ringback tone service using an originating vocoder. In a system for providing a multimedia ringback tone service using a called side exchange and a calling side vocoder, when a calling subscriber calls a called subscriber, the ringback tone source preset by the called subscriber in the sound source providing server is played by the calling terminal. A home location register (HLR) storing profile information including whether a subscriber subscribes to a ringback tone service and multimedia codec information supported by a subscriber station; When the calling terminal attempts to connect to the called terminal, it receives an ISUP (ISDN User Part) call connection request message including the multimedia codec information from the calling exchange, and the calling vocoder encodes a sound source into the multimedia codec. If possible, transmits an ISUP (ISDN User Part) call connection request message including the multimedia codec information to a sound source providing server, receives the ringback tone sound source from the sound source providing server, and sets the vocoder for the multimedia codec to the calling-side vocoder. Called side exchange; And When receiving the vocoder setting request from the called side exchange, the calling side vocoder which encodes the ringback tone sound source into the multimedia codec and transmits it to the calling terminal. Including, but when the call is made by the called terminal, the called side exchange transmits a call incoming signal and a codec setting change request signal for the voice call of the called terminal to the calling side exchange, and the calling side exchange And when the codec setting change request signal is received, requests the source side vocoder to change the codec setting to the voice codec. The method of claim 29, The called side exchange exchanges the ISUP call connection request message to the sound source providing server and requests the calling terminal to set the multimedia codec to activate a routing path for the ringback tone service. And a system for providing a multimedia ringback tone service using an originating vocoder. The method of claim 27 or 29, The ringback tone sound source is stored, and upon receiving the ISUP call connection request message from the source exchange or the destination side exchange, the ringback tone source selected using the multimedia codec information is transferred to the source side exchange or the destination side exchange. Sound recording server to transmit System for providing a multimedia ringback tone service, characterized in that it further comprises. The method of claim 31, wherein When the sound source code request signal including the multimedia codec information is received from the sound source providing server, the sound source providing control of searching for a ringback tone sound source code convertible to the multimedia codec using the multimedia codec information and transmitting the same to the sound source providing server server System for providing a multimedia ringback tone service, characterized in that it further comprises. The method of claim 32, Wired / wireless to be connected to the sound source providing server or the sound source providing control server to add a sound source to be stored in the sound source providing server or to change information for specifying a sound source and the corresponding ringback tone sound source code to the sound source providing control server Web server that serves web pages System for providing a multimedia ringback tone service, characterized in that it further comprises. The method of claim 31, wherein And a ring back tone sound source received from the sound source providing server is selected using the multimedia codec information. The method of claim 31, wherein The sound source providing server is a system for providing a multimedia ring back tone service, characterized in that various sound sources are stored for each type of multimedia codec. The method of claim 31, wherein The sound source providing server transmits a sound source code request signal including the multimedia codec information received from the calling side exchange or the called side exchange to a sound source providing control server, and transmits a ringback tone sound source code received from the sound source providing control server. And providing the ringback tone sound source to the calling side exchange or the called side exchange using the multimedia ring back tone service. The method of claim 36, The sound source code request signal includes the multimedia codec information, the called terminal identification information, the calling terminal identification information, and / or the call request time zone information. The method of claim 36, And the ringback tone sound source code stored in the sound source providing control server is classified and stored according to the multimedia codec, a specific caller, a caller group, and / or a calling time zone. delete delete The method of claim 27 or 29, The originating terminal provides a multimedia ringback tone service, characterized in that for playing the received ringback tone sound source using the multimedia codec. The method of claim 27 or 29, The home location register is a system for providing a multimedia ringback tone service, characterized in that the multimedia codec information supported by the terminal is stored for each terminal subscribed to the multimedia ringback tone service.

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