KR20040098844A - System and method for ring back tone service using service switching point - Google Patents

Abstract

PURPOSE: A ring-back tone service system using an SSP(Service Switching Point) and a method therefor, particularly for providing a specific sound source set by a callee to a caller without changing an operation profile for an exchange, are provided to reduce a huge expenditure for changing the operation profile. CONSTITUTION: An HLR(Home Location Register)(160) registers information on whether a mobile communication subscriber has subscribed for a ring-back tone service and information on CRBT(Customized Ring Back Tone) prefix to an SSP(110). When the HLR(160) receives a request for making a reference for a position of a callee from an O_MSC(Origination_Mobile Switching Center)(141), it receives a TLDN(Temporary Local Directory Number) through communication with a T_MSC(Termination_Mobile Switching Center)(142), checks whether the callee has been subscribed for the ring-back tone service, and transmits a response message for call connection to the SSP(110) to the O_MSC(141). The O_MSC(141) analyzes the response message, and when routing to the SSP(110) is recognized, the O_MSC(141) transmits an IAM(Initial Address Message) to the SSP(110). The SSP(Service Switching Point)(110) sets each call for an IP(Intelligent Peripheral)(120) and the T_MSC(142), responds to the O_MSC(142) about call setup, connects the O_MSC(142) and the IP(120), and then connects the IP(120) and the T_MSC(142). When a basic ring-back tone is detected within a pre-set reference transmission time. the IP(120) transmits a specific sound source to the O_MSC(141).

Description

Ring back tone service system using SSP and its method {System and method for ring back tone service using service switching point}

The present invention relates to a ringback tone service system and a method using a ringback tone service exchanger, and more particularly, to provide a specific sound source set by a called party as a substitute for a basic ringback tone using a service switching point (SSP). A ringback tone service system and method thereof are provided.

In general, when a predetermined caller attempts to make a telephone call to a called party, in the existing mobile communication network, the called party causes the called party to provide a uniform basic ring back tone (RBT) to the caller. The system is adopted. As such, in the conventional mobile communication network, only a uniform basic ringback tone is provided to the caller when a call is connected, and a specific sound source reflecting the intention of the called party is not provided as the ringback tone. As a result, in the existing mobile communication network, various methods for providing a specific sound source reflecting the intention of the called party as a substitute for the basic ringback tone have been proposed.

Hereinafter, an example of the related art for providing a specific sound source set by the called party as a ringback tone (hereinafter referred to as a ringback tone service method) will be described with reference to FIG. 1.

First, a home location register (HLR) 11 receives ringback tone service subscription information and ringback tone for a mobile subscriber from a ringback tone service provider terminal device (not shown) connected through the Internet (not shown). Receives routing information (i.e., Routing Digits) that can be routed to the sound source providing device 14, to the corresponding mobile communication subscriber profile of the provided subscriber database (not shown). Register (s10).

When the location registration of the mobile communication subscriber is requested from the destination exchange 12 (s11), the home location register 11 confirms the subscription of the ringback tone service based on the profile of the mobile communication subscriber stored in the subscriber database. (s12), As a result, when it is confirmed that the subscriber is a ringback tone service (hereinafter referred to as a called subscriber), the ringback tone service setting information and the routing information of the sound source providing device 14 for the corresponding called party respond according to step s11. Included in the message and delivered to the destination exchange 12 (s13).

At this time, the destination exchange 12 stores / manages the ringback tone service setting information for the called subscriber received from the home location register 11 and routing information to the sound source providing device 14 (s14). In general, the processes s10, s11, s12, s13, and s14 described above are performed before the caller attempts a telephone call.

Subsequently, when the caller attempts a phone call to the called party subscribed to the ringback tone service, the calling switch 10 transmits a message requesting a location inquiry to the called subscriber to the home location register 11 (S15).

At this time, the home location register 11 sends a message including the incoming routing information (TLDN: Temporary Local Directory Number) provided as the incoming routing information is requested to the incoming exchange 12 in response to step s15. (S16, s17, s18).

The originating exchange 10 requests an ISUP call connection to the destination exchange 12 based on the message received through step s18 to form a mutual channel (s19).

On the other hand, when the terminating exchange 12 is requested to access the ISUP call from the originating exchange 10, it checks the service setting information of the corresponding called party stored in advance, and the ring subscriber is a ringback tone service and the ringback tone service is activated. If it is confirmed that (s20), on the basis of the routing information to the pre-stored sound source providing device 14 to request the ISUP call connection to the sound source providing device 14 to form a mutual communication path (s21). At this time, the incoming call number and the outgoing call number are also provided.

The sound source providing device 14 stores various sound sources, and requests a sound source code from the sound source providing control server 13 based on the incoming call number and the outgoing call number provided from the incoming exchange 12. It extracts a specific sound source corresponding to the sound source code and provides it to the caller as a substitute sound of ringback tone (s22, s23, s24). Here, the sound source providing control server 13 receives the code information for the specific sound source set by the called party in advance and the caller information (for example, the outgoing call number) to receive the specific sound source as an alternative sound of the basic ringback tone. Not really managed.

Then, the destination exchange 12, while providing the sound source to the caller, if it is recognized that the incoming subscriber received the call, requests the release of the ISUP call to the sound source providing device 14 to release the call with the sound source providing device 14 After that (s25), the two-way call is made between the calling party and the called party through the mutually formed call path with the calling exchange 10 (s26).

As described above, the existing ringback tone service method has an advantage in that it is possible to provide the callers with a specific sound source set by the called subscriber. However, in consideration of the fact that a mobile communication network is provided with a plurality of home location registers and exchanges by changing an operation profile of a mobile switching center (MSC) as well as a home location register which is a component of an existing mobile communication network. There is a problem that the change of the operation profile for the home location register and the exchange can cause huge expense.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the prior art, and the specific sound source set by the called party is changed to the basic ringback tone while minimizing the change of the operation profile for the home location register and the switch located on the existing mobile communication network. An object of the present invention is to provide a ringback tone service system and a method using an SSP to provide a substitute sound.

1 is an exemplary view showing a procedure for a conventional ringback tone service method;

2 is a schematic configuration diagram of a ringback tone service system using an SSP according to the present invention;

3 is a first exemplary view showing a procedure for a ringback tone service method using an SSP according to the present invention;

4 is a second exemplary view showing a procedure for a ringback tone service method using an SSP according to the present invention;

5 is a third exemplary view illustrating a procedure for a ringback tone service method using an SSP according to the present invention;

6 is a fourth exemplary view showing a procedure for a ringback tone service method using an SSP according to the present invention;

7 is a fifth exemplary view showing a procedure for a ringback tone service method using an SSP according to the present invention;

8 is a sixth exemplary view showing a procedure for a ringback tone service method using an SSP according to the present invention.

Ring back tone service system using the SSP according to the present invention for achieving the above object registers the presence information of the ring back tone service and the routing information to the ring back tone service exchange for the mobile communication subscriber, and from the originating exchange for a predetermined called party When the location inquiry is requested, after receiving the incoming routing information through communication with a predetermined destination exchange, confirming whether the ringback tone service is subscribed to the called party, and sending a response message for call connection to the ringback tone service exchange. A home location register for transmitting to the exchange; An originating exchange which analyzes the response message received from the home location register and transmits a message requesting a call connection to the corresponding ringback tone service exchange when the routing to the ring back tone service exchange is recognized as a result; Based on the message received in response to the call connection request from the originating exchange, each call is set up with the sound source providing device and the destination exchange, and the call setting is answered by the originating exchange, and then the call exchanger and the sound source providing device are connected. A ringback tone service exchanger connecting the destination exchanger; And monitoring the transmission of the basic ringback tone from the destination exchange connected through the ringback tone service exchanger, and if the basic ringback tone is detected within the preset standard transmission time, a specific sound source based on the message received when establishing a call with the ringback tone service exchanger. It is configured to include a sound source providing device for transmitting to the calling exchange connected through the ringback tone service exchange.

In addition, the ringback tone service method using the SSP according to the present invention for achieving the above object is a method for providing a specific sound source set by the called subscriber using the ringback tone service exchanger as a substitute sound of the basic ringback tone, ( a) registering, by the home location register, routing information for the ringback tone service exchanger and the routing information to the ringback tone service exchanger for the mobile subscriber; (b) When a location inquiry is requested for a called party from the calling exchange, the home location register receives ringing routing information through communication with the called destination and confirms whether the ringback tone service is subscribed to the called party. Sending a response message to the originating exchange for a call connection to the backtone service exchange; (c) When a call connection is requested from the originating exchange, the ringback tone service exchange sets up the call with the sound source providing apparatus and the destination exchange respectively in response to the call and answers the call setup with the originating exchange, and then the originating exchange and the sound source providing apparatus. Interconnecting the intercommunication and sound source providing apparatus with the incoming exchange period; (d) monitoring, by the sound source providing apparatus, whether a basic ringback tone is transmitted from the destination exchange connected through step (c) within a preset reference transmission time; And (e) when the basic ringback tone is detected in step (d), the sound source providing device transmits a specific sound source based on the message received when the call is established with the ringback tone service exchange to the calling exchange connected through step (c). It comprises a step.

Hereinafter, a preferred embodiment of a ringback tone service system and a method using an SSP according to the present invention will be described with reference to the accompanying drawings.

2 is a schematic configuration diagram of a ringback tone service system using an SSP according to the present invention. 2, the ringback tone service system 100 according to the present invention is an SSP (Service Switching Point, hereinafter referred to as ringback tone service switch) 110, IP (Intelligent Peripheral, hereinafter, referred to as a sound source providing device) (120), GS (Gateway Switch, hereinafter referred to as a gateway) (130), O_MSC (Originating Mobile Switching Center, hereinafter referred to as an originating exchange) (141), T_MSC (Terminating Mobile Switching Center, hereinafter, called a destination exchange) ) 142, No. 7 network 150, Home Location Register (HLR) (hereinafter referred to as home location register) 160, communication network (for example, the Internet) 170 and ringback tone service subscriber management device 180 It is configured to include.

At this time, the home location register 160 is connected based on the originating exchange 141 and the destination exchange 142 and No. 7 network 150, the originating exchange 141, the destination exchange 142 and the gateway 130 Are interconnected through a relay line for ISUP signaling and voice transmission based on No. 7 network 150. The gateway 130, the ringback tone service exchanger 110, the ringback tone service exchanger 110, and the sound source providing apparatus 120 are connected to each other through a relay line for ISUP signaling and voice transmission. In addition, the sound source providing device 120 and the ringback tone service subscriber management device 180, the ringback tone service subscriber management device 180 and the home location register 160 are interconnected through the Internet 170. In general, there are ISUP, R2, ISDN-PRI, etc. relay signaling between stations (i.e. exchange and exchange period). In the present invention, a ring back tone service system using the ISUP signaling method and a method thereof will be described. However, those skilled in the art may use R2 or ISDN-PRI signaling instead of ISUP signaling according to the characteristics of the present invention described below, so the scope of the present invention is not limited to a specific inter-station relay.

Hereinafter, the ring back tone service method according to the present invention will be described with reference to FIGS. 3 to 8, but will be described in parallel with the operation of each component of the ring back tone service system 100 shown in FIG. 2.

First, prior to explaining the ringback tone service method based on the operation between the components of the ringback tone service system 100 according to the present invention, the ringback tone service subscriber management device 180 and the sound source providing device 120, An operation relationship between the ringback tone service subscriber management apparatus 180 and the home location register 160 will be described.

A mobile subscriber provides a service (e.g., a ringback tone service according to the present invention) to a provider to which he belongs (for example, an offline mobile communication agency or an online web server) as a substitute for a basic ringback tone. When applying for subscription, the ringback tone service subscriber management device 180 interworking with the corresponding operator sets up information (eg, name, social security number, telephone number) and information about the subscriber who has subscribed to the ringback tone service according to the present invention. Register / manage information (eg, phone number) for a specific sound source and a caller to receive the sound as a substitute for the basic ringback tone. On the other hand, the ringback tone service subscriber management device 180 according to the request of the subscriber to subscribe to the ringback tone service according to the present invention, the specific sound source set by the subscriber by caller group, caller age, caller gender, call access request time zone It can also be classified and registered / managed.

Subsequently, the ringback tone service subscriber management apparatus 180 performs basic information based on information about a subscriber who has subscribed to a ringback tone service according to the present invention (hereinafter referred to as subscriber information), a specific sound source type set by the subscriber, and the specific sound source. Information on the caller to be provided as a substitute sound of the back tone (hereinafter, referred to as caller information) is transmitted to the sound source providing apparatus 120 through the Internet 170. In addition, the ringback tone service subscriber management device 180 is connected to the mobile subscribers information whether the subscription to the ringback tone service according to the present invention, and information (ie routing information) for routing to the ringback tone service switch 110, the Internet Transfer to the home location register 160 through 170.

The sound source providing apparatus 120 stores various sound sources, and stores / manages subscriber information, specific sound source types, and caller information received from the ringback tone service subscriber management device 180 through the Internet 170 for each subscriber.

And, the home location register 160 has all the functions as a component of the existing mobile communication network, the ringback tone service according to the present invention for the mobile communication subscriber from the ringback tone service subscriber management device 180 via the Internet 170 Receives the subscription information and the routing information to the ringback tone service exchange 110, and performs the operation to register / manage the profile of the corresponding mobile communication subscriber in the subscriber database (not shown).

Next, a ring back tone service method according to the present invention will be described with reference to FIGS. 3 to 8.

3 is a first exemplary view illustrating a procedure for a ringback tone service method using an SSP according to the present invention. Referring to FIG. 3, the home location register 160 may be configured from a ringback tone service subscriber management device 180 in advance. Ringback tone service subscription information of the mobile communication subscriber and routing information to the ringback tone service exchange 110 is received and registered / managed (s100).

When a predetermined caller attempts to make a telephone call to a called party (hereinafter referred to as a called subscriber) who has subscribed to a ringback tone service according to the present invention, the calling exchange 141 recognizes it through a base station (not shown), and then calls the called party. A location request invoke message is transmitted to the home location register 160 (S101). At this time, the message requesting the location query for the called party includes the calling party information (ie, the calling MDN: Mobile Directory Number) (eg, the telephone number), the called party information (ie, the called MDN) (eg, the caller wants to talk on the phone. Phone number entered).

When the home location register 160 transmits a message for requesting a location inquiry for a predetermined called party from the calling exchange 141, the called party requests the incoming routing information to the called exchange 142 in which the called party registered the last location. Therefore, the incoming routing information (TLDN: Temporary Local Directory Number, TLDN consists of Routing Prefix for routing the call from the originating exchange to the destination exchange and Temporary Number for distinguishing the incoming call from the terminating exchange) (s102, s103). In this case, the message requesting the incoming routing information includes a mobile identity number (MIN) (eg, a phone number) of the called subscriber. On the other hand, the destination exchange 142 performs a function in the existing mobile communication network.

In addition, the home location register 160 searches for the profile of the called subscriber registered in the pre-registered subscriber database so that the called subscriber is a subscriber of the ringback tone service according to the present invention and the ringback tone service of the called subscriber is activated. If the state is set (s104), routing information (CRBT Prefix: Customized Ring Back Tone Prefix) to the ringback tone service exchanger 110, incoming subscriber information (called MDN), and incoming routing information received from the destination exchange 142. The message including the (TLDN) is transmitted to the originating exchange 141 in response to step s101 (s105).

On the other hand, the home location register 160 is confirmed that the called party is not a subscriber of the ringback tone service according to the present invention, or even if the called party is identified as a subscriber of the ringback tone service according to the present invention, the ringback tone service of the called party If is set to the inactive state, performs a general operation of transmitting a message containing only the incoming routing information (TLDN) to the originating exchange 141 in response to step s101.

The originating exchange 141 analyzes the message received in step s105 in response to step s101, and as a result, recognizes the information to be routed to the ringback tone service exchange 110 (that is, routing information to the ringback tone service exchange). In operation S106, a message for requesting a call connection to the ringback tone service exchange 110 is transmitted (IAM). In this case, the message for requesting a call connection transmitted through step s106 includes caller information (calling MDN), routing information to the ringback tone service exchange 110, called subscriber information (called MDN) and called routing information (TLDN). .

Here, a message requesting a call connection transmitted from the originating exchange 141 is delivered to the ringback tone service exchange 110 through the gateway (130 of FIG. 2). At this time, the gateway 130 recognizes the routing information to the ringback tone service exchange 110 included in the message relayed from the originating exchange 141 to relay the call to the ringback tone service exchange 110. . Since the gateway 130 performs the same function as in the existing mobile communication network, a detailed description thereof will be omitted.

When the ringback tone service exchanger 110 transmits a message requesting a call connection from the originating exchange 141, the ringback tone service exchanger 110 transmits a message (IAM) requesting a call connection to the sound source providing apparatus 120 (s107) and a response message accordingly. Receive (ACM: Address Complete Message) and establish a call with the sound source providing apparatus 120 (s108). In this case, the message for requesting a call connection transmitted to the sound source providing apparatus 120 through step s107 includes caller information (calling MDN) and called subscriber information (called MDN).

In addition, the ringback tone service exchanger 110 recognizes the destination exchanger 142 based on the incoming routing information (TLDN) included in the message received through step s106, and requests a call connection to the corresponding destination exchange 142. A message (IAM) is transmitted (s109), and a response message (ACM) is received accordingly to establish a call with the destination exchange 142 (s110). In this case, the message for requesting a call connection transmitted to the destination exchange 142 through step s109 includes caller information (calling MDN) and call routing information (TLDN).

Here, a message requesting a call connection transmitted from the ringback tone service exchange 110 is transmitted to the destination exchange 142 through the gateway 130. At this time, the gateway 130 recognizes the incoming routing information (TLDN) included in the message relayed from the ringback tone service exchange 110 to relay the call to the destination exchange 142.

In addition, the ringback tone service exchanger 110 establishes a call with the sound source providing apparatus 120 through steps s107 and s108, and sets up a call with the destination exchange 142 through steps s109 and s110. In step s111, a call (ACM) for setting up a call, which is a response to step S106, is transmitted to the originating exchange 141. Here, steps s107 and s108 are described as an example of a call setup process between the ringback tone service exchanger 110 and the sound source providing device 120 as an example, and steps s109 and s110 are ringback tone service exchanger 110 and the destination exchanger 142. As an example of a call setup process between), the order in which the ringback tone service exchanger 110 establishes a call with the sound source providing apparatus 120 and the destination exchanger 142 may be changed.

Thereafter, when the operation of the ringback tone service exchanger 110 is completed, the output terminal (not shown) of the source exchanger 141 and the input terminal (not shown) of the sound source providing device 120 are connected, and the sound source providing device is completed. The output terminal (not shown) of 120 and the input terminal (not shown) of the destination exchanger 142 are connected to form a currency path (s112).

At this time, when the sound source providing apparatus 120 is connected to the destination exchange 142 through step s112, it monitors whether the basic ringback tone is sent from the destination exchange 142 within a preset reference transmission time (s113).

When the basic ringback tone is detected within the preset reference transmission time (s114), the sound source providing apparatus 120 receives the corresponding subscriber based on the caller information and the called subscriber information included in the message transmitted when the call connection request is made in step s107. The specific sound source set to be provided to the caller is extracted, and the specific sound source is transmitted to the originating exchange 141 connected through the step S112 as an alternative sound of the basic ringback tone (S115). At this time, the caller listens to the specific sound source set by the called subscriber as ring back tone.

On the other hand, the ringback tone service exchanger 110 connects the source exchanger 141 and the sound source providing device 120 through the step s112, connects the sound source providing device 120 and the destination exchange 142, the destination exchange 142 In the state in which the specific sound source from the sound source providing apparatus 120 is transmitted to the originating exchange 141 all the time while the basic ringback tone from the message is detected, a message informing the response of the called subscriber from the terminating exchange 142 (ANM: Answer Message) is transmitted (s116), and releases the set call with the sound source providing apparatus 120 through step s107 and s108 to stop the transmission of a particular sound source to the source exchange (141) (s117).

In addition, the ringback tone service exchanger 110 transmits the message received through the operation s116 to the originating exchange 141 (s118), and establishes a call path between the originating exchange 141 and the destination exchange 142 to make a call with the caller. A voice call is made between subscribers (s119).

FIG. 4 is a second exemplary view showing a procedure for a ringback tone service method using an SSP according to the present invention, wherein a specific sound source from the sound source providing apparatus 120 is detected throughout the basic ringback tone from the destination exchange 142. In the state of transmitting to the originating exchange 141, it will be described the operation process for the case that the call release is requested from the destination exchange 142. At this time, the operation process of steps s200 to s215 shown in FIG. 4 is the same as the operation process of steps s100 to s115 shown in FIG.

Referring to FIG. 4, the ringback tone service exchanger 110 transmits a call release from the destination exchange 142 in a state in which a specific sound source from the sound source providing apparatus 120 is transmitted to the originating exchange 141 through step s215. When a request message (REL: Release Message) is transmitted (s216), a message for requesting a call release is transmitted to the originating exchange 141 to release the set call with the originating exchange 141 through steps s206 and s211 ( S217), by transmitting a message requesting the call release to the sound source providing apparatus 120, the call set with the sound source providing apparatus 120 is released through step S207 and step S208 (S218). At this time, the progress order of steps s217 and s218 may be changed. In this case, when the call release is requested from the destination exchange 142, the terminal is generally turned off due to lack of power of the terminal while the mobile communication terminal of the called subscriber rings the ring. There is a case where the terminal is moved to a shaded area (frequency not reached) while ringing a telephone.

FIG. 5 is a third exemplary view showing a procedure for a ringback tone service method using an SSP according to the present invention, wherein a specific sound source from the sound source providing device 120 is detected throughout the basic ringback tone from the terminating exchange 142. In the state of transmitting to the originating exchange 141, it will be described the operation process for the case that the call release is requested from the originating exchange 141. At this time, the operation process of steps s300 to s315 shown in FIG. 5 is the same as the operation process of steps s100 to s115 shown in FIG.

Referring to FIG. 5, the ringback tone service exchanger 110 transmits a call release from the originating exchange 141 in a state in which a specific sound source from the sound source providing apparatus 120 is transmitted to the originating exchange 141 through step s315. When the request message is transmitted (s316), by transmitting a message requesting the call release to the destination exchange 142 to release the set call with the destination exchange 142 through step s309 and s310 (s317), the sound source providing apparatus By transmitting a message requesting the release of the call to 120, the set call is released with the sound source providing apparatus 120 through steps s307 and s308 (s318). At this time, the progress order of steps s317 and s318 may be changed. In this case, the call release is requested from the originating exchange 141. In general, there is a case in which the caller releases a call while the caller is listening to a specific sound source through ringback tone through his terminal.

6 is a fourth exemplary view illustrating a procedure for a ringback tone service method using an SSP according to the present invention, and illustrates an operation process for a case in which a basic ringback tone is not transmitted from the destination exchange 142 within a preset reference transmission time. It is explained. At this time, the operation of steps s400 to s413 shown in FIG. 6 is the same as the operation of steps s100 to s113 shown in FIG.

Referring to FIG. 6, when the ringback tone service exchanger 110 is connected to the destination exchanger 142 through step s412, the sound source providing device 120 may receive a basic ring within a preset reference transmission time from the connected destination exchanger 142. It is monitored whether the backtone is transmitted (s413), and if a basic ringback tone is not detected within the reference transmission time (s414), a message for requesting a call release is transmitted to the ringbacktone service exchange 110 (s415).

At this time, the ringback tone service exchanger 110 releases the set call with the sound source providing apparatus 120 in step s407 and step s408 based on the message received in step s415, and then the call exchanger 141 and the destination exchange 142. ) To form a currency path between the call is made (s416). In this case, a basic ringback tone is not transmitted from the destination exchange 142 within a preset reference transmission time. In general, an incoming call is directly connected to a voice mailbox of the called subscriber.

7 is a fifth exemplary view showing a procedure for a ringback tone service method using an SSP according to the present invention, in which a specific sound source is used as a replacement sound of the basic ringback tone throughout the entire time of detection of the basic ringback tone from the destination exchange 142. The operation procedure for the case where transmission of the basic ringback tone is stopped from the destination exchange 142 in the state of transmitting to the originating exchange 141 is described. In this case, the operation of steps S500 through S515 shown in FIG. 7 is the same as the operation of steps S100 through S115 shown in FIG.

Referring to FIG. 7, when the sound source providing apparatus 120 transmits a specific sound source to the originating exchange 141 in place of the basic ring back tone as the basic ring back tone transmitted from the terminating exchange 142 is detected ( S515), if the basic ringback tone is not detected as the transmission of the basic ringback tone is stopped from the destination exchange 142, the message transmitting a request for release is sent to the ringback tone service exchange 110 (s517).

At this time, the ringback tone service exchanger s517 releases the call set with the sound source providing apparatus 120 in step s507 and s508 based on the message received in step s517 and stops transmitting the specific sound source to the calling exchange 141. After the call, a call path is formed between the originating exchange 141 and the destination exchange 142 to make a call (s518). In this case, the basic ringback tone is transmitted from the destination exchange 142 and is not transmitted. In general, the called party does not respond within a predetermined time, and thus, the incoming call is connected to the voice mailbox of the called party.

8 is a sixth exemplary view showing a procedure for a ringback tone service method using an SSP according to the present invention, and describes an operation process for the case where an error occurs in the sound source providing apparatus 120. At this time, the operation of steps s600 to s607 shown in FIG. 8 is the same as the operation of steps s100 to s107 shown in FIG.

Referring to FIG. 8, when the sound source providing device 120 transmits a message requesting a call connection from the ringback tone service switch 110 in a current error state (s607), a message for call release in response to the request is provided. Transmit (s608).

At this time, the ringback tone service exchanger 110 recognizes that the call with the sound source providing apparatus 120 is not established, and after performing steps s609 and s610 for call setup with the destination exchange 142, the originating exchange 141 In step s611, the mobile station establishes a call with the originating exchange 141 by transmitting a message for setting a call that is a response to step S606.

In addition, the ringback tone service exchanger 110 connects the originating exchanger 141 and the destination exchanger 142 to form a call path when the operation up to step S611 is completed (s612). At this time, the originating exchange 141 provides the caller with the basic ringback tone transmitted from the terminating exchange 142.

So far I looked at the center of the preferred embodiment for the present invention. However, it will be understood by those skilled in the art that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

According to the present invention, a specific sound source set by the called party can be provided to the caller as a ringback tone without changing the operation profile of the exchange, which is a component of the existing mobile communication network, and the enormous cost of changing the operation profile of the exchange can be provided. This can save you money.

Claims (12)

A method for providing a specific sound source set by a called subscriber as a substitute for a basic ringback tone using a ringback tone service exchanger, (a) registering, by a home location register, routing information to a ringback tone service exchange with subscription information of a ringback tone service for a mobile subscriber; (b) When a location inquiry is requested for a called party from the calling exchange, the home location register receives ringing routing information through communication with the called destination and confirms whether the ringback tone service is subscribed to the called party. Sending a response message to the originating exchange for a call connection to the backtone service exchange; (c) When a call connection is requested from the originating exchange, the ringback tone service exchange sets up the call with the sound source providing apparatus and the destination exchange respectively in response to the call and answers the call setup with the originating exchange, and then the originating exchange and the sound source providing apparatus. Interconnecting the intercommunication and sound source providing apparatus with the incoming exchange period; (d) monitoring, by the sound source providing apparatus, whether a basic ringback tone is transmitted from the destination exchange connected through step (c) within a preset reference transmission time; And (e) When the basic ringback tone is detected in step (d), the sound source providing device transmits a specific sound source based on the message received when establishing a call with the ringback tone service exchanger to the calling exchange connected through step (c). Ring back tone service method using a ring back tone service exchange, characterized in that it comprises a step. The method of claim 1, wherein step (c) In response to a call connection request from the originating exchange, the caller information, the called subscriber information, and the incoming routing information are received, and the received caller information and the called subscriber information are transmitted to the sound source providing device to set up a call with the sound source providing device. A ringback tone service method using a ringback tone service switch, characterized in that after identifying a destination exchange based on the incoming routing information, transmitting the caller information and the destination subscriber information to the identified destination exchange to establish a call with the corresponding destination exchange. The method of claim 2, wherein step (e) If the basic ringback tone is not detected within the preset reference transmission time in step (d), the ringback tone service switch using the ringback tone service exchange, characterized in that requesting a call release to the ringback tone service exchange. The method of claim 2, wherein step (e) If the basic ringback tone is detected within the preset reference sending time in step (d), the caller is provided to the caller by the called party based on the caller information and the called party information included in the message received when the call is requested from the ringback tone service exchange. Ring back tone service method using a ring back tone service exchange, characterized in that for extracting the specific sound source set to be transmitted to the calling exchange. The method of claim 4, wherein (f) If the ringback tone service exchanger transmits a specific sound source from the sound source providing device to the calling exchange through step (e), if a message indicating the response of the called party is transmitted from the called exchange, the call established with the sound source providing device is set. Disabling the specific sound source transmission to the originating exchange, and forwarding a message informing the response of the called party to the originating exchange, further comprising the step of supporting the formation of the call between the calling exchange and the incoming exchange period Ringbacktone service method using ringbacktone service exchange. The method of claim 4, wherein (f) if the ringback tone service exchange is transmitting a specific sound source from the sound source providing apparatus to the originating exchange through step (e), if a call release is requested from the terminating exchange or the originating exchange, releasing all set calls; Ring back tone service method using a ring back tone service exchange, characterized in that further comprises a. The method of claim 4, wherein (f) ringback tone service if the detection of the basic ringback tone is stopped while the sound source providing device is transmitting a specific sound source to the originating exchange in place of the basic ringback tone all the time while the basic ringback tone from the destination exchange is detected. Requesting the call release to the exchange, (g) If a call release is requested from the sound source providing apparatus in step (f), the ringback tone service exchange releases the call set up with the sound source providing apparatus, and then supports the formation of a call during the incoming exchange period with the calling exchange. Ring back tone service method using a ring back tone service exchange, characterized in that further comprises. Registering ringback tone service subscription information and routing information to ringback tone service exchange for the mobile subscriber, and when the location inquiry is requested from the originating exchange for the called party, the incoming routing information is communicated through the communication with the designated destination exchange. A home location register for checking whether a ringback tone service is subscribed to the called party and receiving a response message for a call connection to a ringback tone service exchange to a calling exchange; An originating exchange which analyzes the response message received from the home location register and transmits a message requesting a call connection to the corresponding ringback tone service exchange when the routing to the ring back tone service exchange is recognized as a result; Based on the message received in response to the call connection request from the originating exchange, each call is set up with the sound source providing device and the destination exchange, and the call setting is answered by the originating exchange, and then the call exchanger and the sound source providing device are connected. A ringback tone service exchanger connecting the destination exchanger; And When the basic ringback tone is detected within the preset standard sending time by monitoring the transmission of the basic ringback tone from the destination exchange connected through the ringback tone service exchanger, the specific sound source based on the message received when establishing a call with the ringback tone service exchanger is detected. Ring back tone service system using a ring back tone service exchange, characterized in that it comprises a sound source providing device for transmitting to the calling exchange connected through the ring back tone service exchange. 9. The system of claim 8, wherein the ringback tone service exchanger If a message informing the answer of the called party is transmitted from the destination exchange in a state in which a specific sound source from the sound source providing device is connected to the originating exchange by connecting the originating exchange device and the sound source providing device, the call exchanger is released by releasing the set call with the sound source providing device. A ringback tone service system using a ringback tone service exchange, characterized in that for stopping the transmission of a specific sound source to the call, and transmitting a message informing the called party's response to the call exchanger to support the formation of a call during the call exchange period. 9. The system of claim 8, wherein the ringback tone service exchanger Ringback tone, characterized in that when the call is requested from the destination exchange or the source exchange in the state that the specific source from the sound source providing device is connected to the originating exchange and the sound source providing device is connected to the originating exchange. Ringback tone service system using service exchanger. The method of claim 8, wherein the sound source providing apparatus If the base ringback tone from the destination exchange is not detected within the preset reference sending time, request a call release to the ringback tone service exchange, or a specific sound source can be substituted for the base ringback tone throughout the entire time period while the base ringback tone from the destination exchange is detected. And transmitting a call back to a ring back tone service exchange when the detection of the basic ring back tone is stopped while transmitting to an originating exchange. 12. The system of claim 11, wherein the ringback tone service exchanger When the call release is requested from the sound source providing apparatus, the ringback tone service system using the ringback tone service exchange, characterized in that after the release of the call set with the sound source providing apparatus to support the formation of a call during the call exchange and the incoming exchange period.