KR20050038135A - System and method for serving ring back tone - Google Patents

Abstract

The present invention relates to a system and method for a ring back tone service in which a specific sound source is set as a ring back tone instead of a general ring back tone when a user attempts to make a call when a communication user sets a specific ring back tone. To this end, the present invention, if a call occurs from the terminal of the originating service subscriber that set the specific sound source to the ring tone, checking the state of the called terminal, and the state of the called terminal to send a guide ring tone other than the usual ringback tone If it is, the method provides a ring tone service method comprising the step of transmitting the guide ring tone to the terminal of the calling service subscriber instead of the preset ring tone.

Description

System and method for serving ring back tone}

The present invention relates to a system and method for a ring back tone service. More particularly, when a communication user sets a specific sound source as a ring back tone when a call is made, the user sets the ring tone as a ring tone instead of the general ring back tone in the city. The present invention relates to a ring back tone service system and method.

In general, in a conventional communication network, when a caller attempts a phone call using his terminal, the caller hears the same ring back tone, that is, a ring-back tone, until the call setup is completed between the caller terminal and the called party terminal.

Recently, instead of the uniform ring back tone, a specific sound source (for example, voice advertising message, music, etc.) is also provided as the ring back tone.

The ring tone service currently being serviced can be classified into two types.

One, if the subscriber sets a specific sound source to be used as the ring back tone, a caller who attempts to call the subscriber who sets the specific sound source as the ring back tone (hereinafter referred to as a 'caller subscriber') selects the specific sound source set as the ring tone. It is a ring back tone service based on the incoming service subscriber who listens to the ring back tone (for example, SKT: coloring, KTF: ring-to-yu, LGT: peeling).

In addition, the subscriber sets a specific sound source to be used as a ring tone, and when the subscriber himself attempts to make a call to the called party, the caller (hereinafter referred to as an outgoing service subscriber) himself or herself listens to the set sound source (for example, For example, KTF: Ring Tumi is a ring tone service based on the originating service subscriber, an example of which is a patent application No. 2000-40564 filed on July 14, 2000 by the present applicant (information using a waiting time for a call response in a communication system). Providing method and apparatus).

DETAILED DESCRIPTION Hereinafter, a ring back tone service method according to the related art will be described with reference to the accompanying drawings.

1 is a view for explaining the basic concept of a general ring tone service.

1 is a basic concept of a dial-up ringtone service based on the outgoing subscribers to set the sound source of the general ring-tone service, and to listen to the sound set by the ringer to the call when the call is made for the call connection with other subscribers Explain.

First, the sound source providing apparatus 1 stores and manages a sound source to be used as a call connection sound, and the caller accesses the sound source providing apparatus 1 through the Internet 2 using the computer 5 or the terminal 4. After the user accesses the sound source providing apparatus 1 through the switch 3 and registers as a calling service subscriber of the ring back tone service, and sets the appropriate sound source as the ring back tone, the sound source providing device 1 registers the sound source for each originating service subscriber. .

Subsequently, when the calling service subscriber attempts to make a call connection with an arbitrary called party terminal using the terminal 4, the exchange 3 recognizes this and finds a sound source registered by the calling service subscriber through the sound source providing device 1. It provides a ring back tone to the terminal 4 of the calling service subscriber.

2 and 3 are diagrams illustrating a service system for a ring back tone service according to the prior art.

2 shows an outgoing public switched telephone network (hereinafter referred to as an outgoing PSTN) 30, an outgoing mobile exchange / visitor subscriber location register (called MSC / VLR: hereinafter referred to as an outgoing mobile switching center) 31 and an interworking exchange 40 3 is a case in which the calling PSTN 30 and the calling mobile switching center 31 are directly connected to the sound source providing device 60.

More specifically with respect to the outgoing mobile switching center 31, the outgoing mobile switching center 31 may be installed in several places in the region. However, since the sound source providing device 60 is preferably connected to one originating mobile switching center 31, the originating mobile switching center 31 shown in FIG. 2 or FIG. May be the mobile switching center to which it belongs, but it may not. That is, since the mobile switching station to which the calling service subscriber 11 belongs is not directly connected to the sound source providing apparatus 60, the sound source providing apparatus 60 through the calling mobile switching station 31 connected to FIG. Although a detailed description thereof is omitted, transmission and reception signals or data exchanged with the originating mobile switching station 31 by the mobile switching center of the originating service subscriber 11 may be transmitted to the originating mobile switching center 31 shown in FIG. 2 or 3. Explain that you are giving and receiving

Hereinafter, a system and method for a ring back tone service according to the related art will be described based on the drawings of FIG. 2.

In the system configuration for the ring back tone service according to the prior art, the wired telephone outgoing service subscriber 10 subscribing to the ring back tone service includes an outgoing PSTN 30 and an interworking switch (an intelligent network SSP (service switching point); 40) and the mobile communication originating service subscriber 11 through the originating base station / base station controller (BTS / BSC) 21 and the originating mobile switching center 31 and the interworking switch 40. Talk to the landline subscriber 12 connected to 32). Alternatively, a call is made with the Tongdong communication subscriber 13 through the Public Land Mobile Network 33 and the Tongdong Switching Network 23. Or a call to a mobile subscriber 14 via an incoming mobile exchange / visitor location register (MSC / VLR: hereinafter referred to as a destination mobile switching center) 34 and a destination base station / base station controller (BTS / BSC) 24 do.

The Home Location Register (HLR) 50 is a mobile subscriber database having terminal information, subscription information, location information, and authentication function of the mobile communication originating service subscriber 11, and the calling mobile switching center 31 or the like. Connected to the destination mobile switching center (34) and interworking switch (40) to control the signaling network protocol (SS7) together with the visitor location register (VLR), and also to complete the incoming call and update the subscriber information. Perform a transaction for

And the sound source providing apparatus 60 connected to the interlocking exchange 40 is connected to the interlocking exchange 40, the call connection sound providing means (Intelligent Peripheral) (hereinafter referred to as a terminal) for transmitting the ring back tone to the terminal of the originating service subscriber (10 or 11) RBT-IP (61) and RBT-IP (61) connected to the RBT-IP 61 to store and manage the sound source to be used as a ring tone (SCP: Service Control Part) (hereinafter referred to as RBT-SCP) It consists of 62.

Hereinafter, at least one or more configurations of the originating PSTN 30, the originating mobile switching center 31 or the interlocked exchange 40 are called the originating exchange 35, and the terminating PSTN 32, PLMN 33 or terminating mobile switching center At least one or more configurations of 34 are referred to as called-side exchanger 36.

The basic service scenario in such a service system is that when the originating service subscriber who subscribes to the RBT service generates a call using his terminal, the interworking switch 40 transmits the call to the RBT-IP 61, The RBT-IP 61 requests a sound source code search to the RBT-SCP 62, receives a preset sound source from the RBT-SCP 62, and sets a specific sound source set by the calling service subscriber instead of the normal ring back tone (RBT). Play as ring back tone.

In more detail, the wired telephone outgoing service subscriber 10 connected to the outgoing PSTN 30 or the mobile communication outgoing service subscriber 11 connected to the outgoing BTS / BSC 21 dials the number of the counterpart terminal through its own terminal. If it is input (in the case of the mobile communication originating service subscriber 11, pressing the Send key additionally), the originating PSTN 30 or the originating mobile switching center 31 confirms whether it is a ring back tone service subscriber. At this time, the calling mobile switching center 31 uses the information of the visited subscriber location register (VLR) to check whether the ring tone service subscriber is present.

When it is confirmed that the caller is the calling service subscriber 10 or 11 registered in the ring back tone service, the calling PSTN 30 or the calling mobile switching center 31 relays the call to the RBT-IP 61 through the interworking switch 40 ( The RBT-IP 61 requests the RBT-SCP 62 to search for a sound source set by the corresponding originating service subscriber 10 or 11.

At this time, if the subscriber is not registered in the ring back tone service, the ring back tone is provided by the called side exchange 36.

The RBT-SCP 62 confirms whether to subscribe to the service from the received caller information, and selects and provides a ring back tone to be provided to the corresponding calling service subscriber 10 or 11 when subscribed to the service.

Then, when the called party answers, the calling service subscriber-based ring back tone service is terminated.

However, there are the following problems in the ring-tone service based on the originating service subscriber as described above.

In general, when the called party does not respond, various guide voices (hereinafter referred to as guide connection tones) are provided from the called side exchange 36 to the caller's terminal.

For example, if the communication subscriber does not answer the call or exists in the shadowed area, after playing the ring tone for a certain time, the call is exchanged from the called party's exchange 36 to the caller's terminal. You will be charged after you are connected, so hang up if you do not like it. "

When attempting to make an international call, it provides services such as a shadow area existence guide or a number change guide as in the case of domestic calls.

In the case of a service that goes through several other exchanges, a guide ring tone may be provided to the calling terminal in the middle.

However, when the RBT-IP for reproducing the RBT is connected with the calling exchange 35 when the call-back tone service based on the calling service subscriber is provided, the called party switching 36 connected after the calling exchange 35 is connected. The announcement announcement (Announcement) provided is a guide announcement sound before a separate signal (that is, a signal for completing the call setup by the No.7 signaling method), so the subscriber cannot recognize the originating service. That is, in general, a signal channel and a voice channel are set up between a calling party terminal and a called party terminal. The signal channel is a signal for assigning or releasing a voice channel using the No. 7 protocol before the voice channel is set. When a caller terminal is exchanged for a period of time, and the called party terminal is in the off-hook state, it is notified to the calling exchanger 35 connected to the calling party terminal using a No.7 protocol message. In this case, in general, when the called terminal does not off-hook, it informs the status information of the called terminal through the guide connection sound.

That is, when the terminal power of the communication subscriber is off, in a call, in a state of not receiving a call (Time-out) or in a shadowed area (out of coverage), the called party's terminal is currently connected to the calling party's terminal by the called party's exchange. It informs the status of and connects to the voicemail box, which has a problem that even when attempting an international call, it may be impossible to listen to the guide connection sound, such as the presence of the shaded area or guide the number change, as in the domestic case.

In addition, in the case of a service that goes through several other exchanges, there was a problem that it was impossible to listen to the service guide provided in the middle.

As another example, even when the called party is mainly connected to an automatic answering service (ARS) using a private branch exchange (PBX) among wired network subscribers, a guide ring tone is provided, but there is a problem in that the calling service subscriber cannot hear the guide ring tone.

As another example, when a wireline provider, such as a lifetime number, went through an exchange using No. 7, there was a problem in that the exchange itself could not hear the announcement.

That is, in the ring back tone service based on the outgoing service subscriber, the outgoing service subscriber's terminal releases the call path with the RBT-IP only after receiving the setting completion signal for the call using the No.7 protocol.

In addition, when a call connection sound providing service is performed for the called service subscriber, that is, a sound source set by the called service subscriber (for example, SKT: coloring, KTF: ring-to-yu, LGT: peeling) is provided by the called mobile switching center. There was a problem that can not hear the set sound source. Of course, depending on the service configuration, the service for the originating service subscriber may be a priority, but depending on the originating service subscriber may want to listen to the sound source set by the incoming service subscriber.

As described above, since the RBT-IP for reproducing the sound source is connected to the calling exchange, announcements provided by the called exchange connected after the calling exchange are separate signals (No. 7). This is because the originating exchange cannot recognize the guide connection sound before the separate signal (No. 7).

Therefore, the circuit connected to the originating service subscriber is open because the channel with the RBT-IP connected to the originating exchange is open. It is the sound source to be played on the RBT-IP connected to the originating exchange of.

Therefore, in the prior art, even if the guide ring tone according to the called party's situation is provided to the calling service subscriber terminal, the calling service subscriber listens only to the ringback tone set by the caller. There is a problem that you do not hear the set ring tone but you do not know exactly whether the ring tone provided from the called party, even if it is currently connected to the voice mailbox.

The present invention has been made in view of the problems of the prior art as described above, and an object of the present invention is that when a communication user sets a specific sound source as a ring back tone at the time of call origination, the corresponding user replaces the general ring back tone in the city. It is to provide a ring tone service system and method that can provide a set ring tone sound as well as a ring tone, as well as a guide ring to be transmitted in a state that the caller and the call is not set.

Further objects, features and advantages of the present invention will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

In order to achieve the above object, the present invention, when a call originates from the terminal of the originating service subscriber set the specific sound source to the ring tone, checking the state of the called terminal, the state of the called terminal other than the usual ringback tone If the state of transmitting the guide ring tone of the call, instead of the predetermined ring back tone provides a call ring service method comprising the step of transmitting the guide ring tone to the terminal of the calling service subscriber.

On the other hand, the called terminal state is at least one of a state of being connected to the private exchange that transmits the guide ring to be automatically set during the call, the power off, the shadow area existence, no answer, during the call.

The checking of the state of the called terminal may be performed using state information of the called terminal recorded at a predetermined position of a communication network providing communication services to the calling terminal and the called terminal.

On the other hand, the step of checking the state of the called terminal, it is preferable to use the state information of the called terminal identified in the home location register connected to the called terminal, the state of the called terminal is a map (MAP: Manufacturing Automation Protocol) It is preferable to check using.

The checking of the state of the called terminal includes requesting a home location register connected to the called terminal to check the state of the called terminal, and transmitting the check result to the calling exchange. It is preferable to be configured.

On the other hand, the calling side exchange receiving the state information of the called terminal from the home location register, the guide ring tones transmitted from the called side exchange when the state of the called terminal to generate a guide ring tone other than the normal ringback tone; It is preferable to provide the calling service subscriber terminal to the calling service subscriber terminal if the calling service subscriber terminal is provided to the calling service subscriber terminal, and if the call ringing tone is generated, if the normal ringback tone is generated. If the answering party does not answer within the set time, the called party exchange requesting a relay to the home location register before connecting to the voicemail service for the call originating from the calling party subscriber terminal; As the relay information is transmitted to the exchange Group is preferably in the caller-side switching center comprises the step of ceasing to provide the ring back tone, and transmits the guide ring back tone transmitted from the receiver-side switching center to the calling service subscriber station.

Here, it is preferable that the originating exchange is an interworking exchange comprising the originating mobile switching center or the mobile switching station, and the called exchange is at least one of a terminating mobile switching center, a public land mobile communication network, or a tadong switching network.

On the other hand, the step of checking the state of the called terminal, it is preferable to use the electrical characteristics of the signal transmitted from the called side exchange to provide a communication service to the called terminal.

In addition, when using the electrical characteristics of the transmitted signal, it is preferable to determine the state of the called terminal using the frequency of the signal transmitted from the called side exchange providing the communication service to the called terminal.

On the other hand, it is preferable that the signal transmitted from the called terminal is transmitted to the calling terminal via a call connection sound providing means for providing the call connection sound.

The checking of the state of the called terminal may include: configuring, by the calling side exchange receiving the call generated from the terminal of the calling service subscriber, a call exchange tone providing means and a line to relay the call; Determining a state of a called terminal by using a signal transmitted from the called side exchange through the configured line, and when a signal other than ringback tone is transmitted from the called side exchange according to the determination result, the ring back tone The line established between the providing means and the originating exchange is disconnected, and a line is established between the called exchange and the originating exchange so that a signal transmitted from the called exchange is transmitted to the originating subscriber subscriber terminal. If a normal ringback tone is transmitted from the called exchange, It is preferably provided with a ring back tone which is the calling subscriber set to the originating exchange.

On the other hand, if the called terminal does not respond within the set time, the called side exchange generates a non-answer guide ring tone to the ring back tone providing means, and the ring back tone providing means receiving the unanswered guide ring tone is received by the calling side exchange. Interrupting the provision of the ring back tone provided to the calling party subscriber terminal by cutting off the line with the ring back tone providing means by requesting a line disconnection with the call exchange sound providing means; Preferably, the non-responsive guide ring tone is transmitted to the calling service subscriber terminal through the calling exchange through the established line.

Here, the signal other than the ringback tone may include one of a guide ring tone, a call-based ring tone, and a ring tone.

On the other hand, the calling side exchange is one of an outgoing public switching telephone network, an outgoing mobile switching center or an interlocking exchange including the mobile switching center, and the called side switching exchange is a terminating public switching telephone network, a terminating mobile switching network, a public land mobile communication network or a Taidong switching network. At least one of them is preferable.

In the checking of the state of the called terminal, it is preferable to include the called terminal state information in a specific area of a signal transmitted from a called side exchange that provides a communication service to the called terminal. In this case, it is preferable that the specific region of the signal is a specific region of the No. 7 message, and the specific region is preferably a preliminary parameter region of the call progress message.

On the other hand, the step of checking the state of the called terminal, detecting the state information of the called terminal obtained while performing a call connection for the call generation from the called terminal to the called terminal, and the detected And including status information in the preliminary parameter value of the call progress message and transmitting it to the calling exchange providing the ring back tone.

Preferably, the calling side exchange is at least one of an outgoing public switched telephone network, an outgoing mobile switching center and an interworking exchange, and the called side switching exchange is at least one of a terminating public switched telephone network, a terminating mobile switching center, and a public land mobile communication network.

On the other hand, the step of checking the state of the called terminal, when a call originating from the terminal of the originating service subscriber, the calling side exchange exchanges the called side exchange to relay the call by requesting the location information of the called terminal to the home location register and the ring back tone Constructing a line with the ring back tone providing means to play the call; reproducing the ring back tone to the calling service subscriber terminal through the ring back tone providing means, and the called exchange attempts to make a call to the called terminal. And checking the state information of the called terminal, and if the state information of the called terminal is not normal according to the check result, including the state information of the called terminal in the set message and transmitting it to the calling exchange. And the originating exchange exchanges with the ring back tone providing means. When the incoming call is sent from the called exchange within the set time when the status message of the called terminal is transmitted to the calling service subscriber terminal, and the guide connection sound transmitted from the called exchange is transmitted to the calling party subscriber terminal, the calling side is disconnected. It is preferable that the exchange comprises disconnecting the line with the ring tone providing means and making a call connection with the originating service subscriber terminal.

In addition, it is preferable to transmit the set message including whether the called terminal is in a power off state or a transliteration state.

On the other hand, it is preferable that the calling side exchange does not form a line with the ring back tone providing means when the called terminal is not a communication network subscriber station.

Preferably, the calling side exchange is an interworking exchange including an originating mobile switching center or the originating mobile switching center, and the called side switching exchange is at least one or more of a terminating mobile switching center, a public land mobile communication network, or a tadong switching network.

According to another embodiment of the present invention, a sound source providing apparatus for storing and managing a sound source to be provided as a ring tone to a calling service subscriber, and checking the state of a called terminal that the calling service subscriber attempts to make a call, the state of the called terminal. In accordance with the present invention, the sound source providing apparatus provides a call connection sound service system including a connection sound determination device for providing a preset sound source or a guide connection sound.

On the other hand, the connection sound determination device is a switch, the switch preferably checks the state of the called terminal in the home location register in which the status information of the called terminal is recorded.

In addition, the connection sound determination device is preferably a separate device for checking the state of the called terminal using the electrical signal transmitted from the called terminal.

On the other hand, the connection sound determination device is a trunk interface unit for receiving the electrical signal transmitted from the call connection sound providing means and transmits to the signal tone detection unit, the frequency of the signal transmitted from the destination side exchange in the electrical signal transmitted from the trunk interface unit And a processor for transmitting a signal to the call connection sound providing means for detecting whether the call connection sound or voice according to the frequency detected by the signal sound detection unit.

The ring tone discrimination apparatus is a switch, and the called party exchange of the exchanges includes information of the called terminal obtained while performing a call connection to the called terminal according to a call attempt from the calling service subscriber terminal in the call progress message. It transmits to the calling exchange, and the calling exchange is preferably used to determine the state of the called terminal.

Hereinafter, a system and method of a ring back tone service according to the present invention will be described with reference to the accompanying drawings.

In the following, the general ring tone that the caller hears before the call is established in the existing communication network is called 'ringback tone', and the caller hears before setting the call with the called party's terminal after the caller sets a specific sound source as the call tone. Is called 'call ring tone'.

4 is a view for explaining a ring tone service system according to the present invention.

The ring-tone service system according to the present invention provides a call-side communication network for providing a call connection and a ring-tone service to a subscriber (receiver: 12, 13, 14) of the called party's communication network 130 to the calling party subscriber 10 registered in the ring-tone service. And a sound source providing device 60 for storing and managing a sound source to be used as a ring tone, and additionally from the called party's communication network 130 to the calling service subscriber's terminal through the calling party's communication network 120. The connection sound discrimination apparatus 110 may further include a sound signal provided.

Here, the calling party communication network 120 further includes an outgoing PSTN 30, an outgoing BTS / BSC 21, an outgoing mobile switching center 31, and an interworking switch 40, as the case may be. 130 includes an incoming PSTN 32, a PLMN 33, a Taidong switching network 23, and an incoming mobile switching center 34.

FIG. 5 is a flowchart illustrating a call processing ring detection method for a ring back tone service subscriber according to a first embodiment of the present invention.

The first embodiment of the present invention is a method for detecting a guide connection sound using a home location register (HLR) when an outgoing service subscriber and a called party subscribe to the same mobile communication service provider. That's how to handle it. This method uses the MAP (Manufacturing Automation Protocol) of the No.7 protocol for the call setup request of the calling service subscriber who sets a specific sound source as the ring tone. This method checks the status of the called party's terminal before configuring the circuit between mobile switching centers.

In this case, the state of the terminal may be divided into a power-on state and a power-off state. In the power-on state, the terminal may be divided into a response, a shadow area (out of a call zone), a non-response (time-out), and the like.

First, the originating exchange 35 which receives the call request message from the terminal of the originating service subscriber (where the originating exchange 35 is the RBT-IP 61 of the originating mobile switching center 31 and the sound source providing apparatus 60). If there is an interlocking exchange 60 between the interlocking exchange 60, the interlocking exchange 60 is the calling exchange 35, and if the calling mobile switching center 31 and the RBT-IP 61 of the sound source providing device are directly connected, the outgoing movement The switching center 31 becomes the calling exchange 35) requests the home location register 50 for location information of the called party's terminal (Location Req.) (S100).

The home location register 50 receiving the location information request requests a relay to the destination mobile switching center 34 (Route Req.) For the circuit configuration (S101), and the destination mobile switching center 34 receives the home location register 50. In response to the relay request for the local line configuration (Route Res.) (S102).

The home location register 50 transmits the location information of the called party's terminal to the calling side exchange 35 (S103).

At this time, when the power of the called party terminal is turned off or not the service subscriber (for example, the result of checking the terminal identification number of the called party terminal is missing) (case1-1), the calling side exchange 35 is the home location register 50. In accordance with the location information of the called terminal transmitted from the) in the same manner as the general call processing procedure and sends a circuit connection request message (IAM: Initial Address Message) to the destination mobile switching center (34) to which the called terminal belongs (S110). The circuit connection request message (IAM) includes the called number and the calling number, and may include the location information of the calling service subscriber terminal as necessary.

When the circuit connection request message (IAM) is received from the calling exchange 35 (S110), the destination mobile switching center 34 receives the calling number and the called number and calling service subscriber included in the circuit connection request message (IAM). Based on the terminal's location information, an ACC (Address Complete Message), which is a response message for the line configuration of the called party terminal and the originating service subscriber terminal, and an answer message (ANM: Answer Message) for configuring the call It transmits to the calling side exchange 35 (S111, S112).

The originating exchange 35 that receives the circuit connection completion message (ACM) from the destination mobile switching center 34 is a normal communication service subscriber (a subscriber that is normally entitled to connect with the incoming call). Status information such as power off of the called terminal and the like. Accordingly, in a state in which the ringback tone set by the originating service subscriber is not provided to the calling service subscriber terminal, the caller receives a guide ring tone such as that the called party is not a normal communication service subscriber and provides the calling service subscriber terminal through the calling mobile switching center.

However, if the called party is a normal subscriber of the communication service and the status of the called party terminal is normal (Case1-2), the calling side exchange 35 transmits a circuit connection request message (IAM) to the called mobile switching center 34 as described above. When the call transfer request is executed and the destination mobile switching center 34 receives the circuit connection request message (IAM) (S120), the calling number and the called number included in the circuit connection request message (IAM) and the calling service subscriber are received. On the basis of the terminal location information and the like, a line connection completion message (ACM), which is a response message for the line configuration of the called party terminal and the originating service subscriber terminal, is transmitted to the calling side exchange 35 (S121).

Receiving a circuit connection completion message (ACM) from the destination mobile switching center (34), the calling party exchange (35) learns that the called party is a normal subscriber of the communication service and the status is normal, and accordingly sends a call connection request to the RBT-IP (61). Sending service subscriber information for the transmission through the circuit connection request message (IAM) (S122), and receives the RBT-1P (61) sends a circuit connection completion message (ACM) for the circuit configuration to the source exchange 35 It transmits (S123).

Subsequently, the RBT-IP 61 requests the sound source code to the RBT-SCP 62 (S124). When a response to the requested sound source code is received (S125), the RBT-IP 61 sends the call to the source exchange 35. Sends an incoming response message (ANM: Answer Message) for configuring a call between the RBT-IP 61 and the calling exchange 35 (S126), and sets the ringback tone set by the calling service subscriber instead of the ringback tone. Transmit to step 35 (S127). The originating exchange 35 transmits the ring back tone to the originating service subscriber terminal through the originating BTS / BSC. Therefore, the outgoing service subscriber listens to the ring back tone.

When the called party's terminal answers the call ring tone service for the calling service subscriber (case2-1), the called mobile switching center 34 recognizes this and transmits an incoming call response message (ANM) to the calling exchange (35). In step S130, the originating exchange 35 transmits a release message (Release: REL) for disconnection with the RBT-IP 61 (S131). When a Release Complete Message (RLC) is transmitted from the RBT-IP 61 (S132), a call is connected between the calling service subscriber and the called party through a call path between the calling exchange 35 and the called mobile switching center 34. This is done (S133).

However, if the called party does not answer for the set time elapsed during the RBT service for the calling service subscriber (Case2-2), the incoming mobile switching center 34 processes the time-out before connecting to the voicemail box (VMS). A relay request is made to the location register (HLR) 50 (Route Req.) (S140), and the home location register 50 transmits the routing information to the originating exchange 35 (Routing Information) (S141). ).

Accordingly, the originating exchange 35 transmits a routing information reception response message to the home location register 50 and a release message REL to the RBT-IP 61.

When the release complete message RLC is transmitted from the RBT-IP 61 to the source exchange 35, the reproduction of the ring back tone provided from the RBT-IP 61 to the source exchange 35 is stopped.

On the other hand, if the home location register 50 responds to the relay request (Route Res.) (S145) to the destination mobile switching center 34, the destination mobile switching station 34 is called to the calling side exchange 35, the called party is in an unresponsive state. The guide connection sound is transmitted (S146).

Such a first embodiment of the present invention is a method using a No.7 protocol message and can be processed at the time of a call between a mobile communication subscriber, and especially its own subscriber. In the case of targeting its subscribers, it is possible to modify the application so that the service is relatively simple and the initial investment cost can be minimized.

6 and 7 are diagrams illustrating a service system configuration for explaining a ring back tone service process according to the prior art, and FIGS. 8 and 9 are service systems for explaining a ring back tone service process according to a second embodiment of the present invention. FIG. 10 is a diagram illustrating a configuration of the service system illustrated in FIGS. 8 and 9 in more detail.

The second embodiment of the present invention is not only when the calling service subscriber is a PSTN subscriber or a mobile communication subscriber, but the called party subscribes to the same communication service provider as the calling service subscriber, as well as other communication service providers (for example, different mobile communication service networks, PSTN, overseas communication network, etc.) can also be applied.

In the second embodiment of the present invention, a tone other than a voice signal tone or a tone other than the voice signal (for example, a ringback tone or a voice signal according to an electrical signal transmitted from the called exchange before the call path between the calling service subscriber terminal and the called terminal is connected). It is to detect a frequency tone (call tone) or a ring back tone based on the called service subscriber terminal) indicating that the called terminal is busy and to transmit it to the calling service subscriber terminal.

First, in order to help the understanding of the present embodiment, a description will be given of a ring back tone service system that is conventionally serviced prior to the description of the present embodiment.

As shown in FIG. 6, the channel configuration between the RBT-IP 61 and the originating PSTN 30 or the originating mobile switching center 31 is connected to the originating PSTN 30 or the originating mobile switching station 31 in both the transmit and receive (Tx, Rx) channels. It was. Therefore, the outgoing service subscriber connected to the outgoing PSTN 30 or the outgoing mobile switching center 31 may hear the ring back tone transmitted from the RBT-IP 61 before the call path with the called party connected to the destination side exchange 36 is established. In addition, it could not listen to any other signal including the guide link sound transmitted from the destination exchange 36. Such a channel configuration for the ring back tone service of the prior art is the same when the originating PSTN 30 or the originating mobile switching center 31 is directly connected to the RBT-IP 61 without an interlocking exchange as shown in FIG.

However, in the second embodiment of the present invention, the setting of the transmission channel is the same as in the prior art, but in the method of setting the receiving channel, as shown in Fig. 8, the receiving channel between the destination exchanger 36 and the RBT-IP 61 is set. , RBT-IP 61 is connected to the connection sound determination device 110 described in detail in FIG. At this time, by connecting a separate additional device called the connection sound discrimination device 110 with the RBT-IP 61, the guide ring tone or other tones other than ringback tone from the destination exchanger 36 (middle tone, incoming call subscriber base) Detect a signal corresponding to the ring tone of the call, etc.) and provide the corresponding tone service to the calling service subscriber. Such a channel configuration in FIG. 8 is the same even when the originating PSTN 30 or the originating mobile switching center 31 is directly connected to the RBT-IP 61 without an interlocking exchange as shown in FIG.

Hereinafter, the case where the interlocking exchange 40 is included will be mainly described. That is, since the interworking switch 40 serves as a service switching point (SSP) for telephone exchange as described above, the outgoing PSTN 30 or the outgoing mobile switching center 31 without the interlocking switch 40 is RBT-IP ( 61) the description of the case in which the direct connection is made will be omitted.

First, as shown in Fig. 8, the pass (or channel) of the interworking switch 40 and the RBT-IP 61 is transferred to the originating PSTN 30 or the originating mobile switching center (MSC) 31 and the destination side exchange ( It maintains until the call connection or the call connection failure between the 36) (that is, the path of the interlocked exchange 40 and the RBT-IP 61 while the ringback tone is coming from the destination exchange 36).

Then, the ring tone determination device 110 guides other tones other than ringback tone (middle tone, incoming call subscriber based call ring tone) or guide ring tone before connecting to voice mail (VMS) (for example, power off of the called terminal). RBT- When an electrical signal other than ringback tone is detected by monitoring the electric signal corresponding to the tone of the ring tone, shadow area (telephone out of range) ring tone, guide ring tone from voice mail (VMS) or answering machine (ARS). The IP 61 transmits a signal transmitted from the called party exchanger 36 to the calling PSTN 30 or the calling mobile switching center 31 through the interlocking switch 40 instead of the ring back tone.

A detailed description with reference to FIG. 10 is as follows.

First, when the interlock exchange 40 transmits a signal transmitted from the destination side exchange 36 to the RBT-IP 61, the RBT-IP 61 transmits the signal to the trunk interface unit of the connection tone determination apparatus 110 through the PCM bus. And the trunk interface unit 111 transmits it to the beep detection unit 112.

The beep detector 112 detects a frequency from the transmitted electrical signal and transmits the frequency to the processor 113. The processor 113 then determines whether the frequency is a ringback tone frequency or not, and transmits information on whether or not the signal detected by the RBT-IP 61 is a ringback tone signal, and accordingly the RBT-IP 61. Stops the transmission of the ring back tone and transmits the detected signal to the calling PSTN 30 or the calling mobile switching center 31 through the interlocking switch 40.

Since it detects and detects one frame of 32ms units, it is possible to perform a quick search and try to detect more than once (for example, three or more times), so that more accurate detection can be pursued. .

Determining whether or not the ringback tone frequency is detected by detecting a frequency from the called side exchange in the transmitted electrical signal as described above, in the case of the ringback tone frequency, presets the same frequency of a predetermined band preset in the called side exchange. In the case of guiding sound, which is not a ringback tone frequency, the same frequency in a predetermined band is not sent in a predetermined period.

In this case, it is possible to provide the quickest and most accurate guide connection sound such as voicemail connection and reduce the waste of the line. In addition, when the called party is an incoming service subscriber who has set up a ring back tone for callers, the outgoing service subscriber can listen to the ring back tone set by the incoming service subscriber. In addition, when the called terminal is busy, a busy signal for the call can be heard.

Connection sound discrimination apparatus 110 according to the present invention can be used in conjunction with the existing RBT-IP, it can be built in the RBT-IP or external form.

In addition, the above-described embodiments and examples are just examples, and may be configured in another manner by using the difference between the above-described ringback tone signal and other signals.

11 to 14 are views for explaining in detail the channel configuration for detecting the guide ring tone for the ring-tone service subscriber according to a second embodiment of the present invention.

Fig. 11 shows that when the originating PSTN 30 or originating mobile switching center 31 sends a call to the destination exchange 36, the interlock exchange 40 receives it and sends a response message thereto. That is, the transmission / reception channel between the originating PSTN 30 or the originating mobile switching center 31 and the interworking switch 40 is configured.

Subsequently, as shown in FIG. 12, the interlocking exchange 40 relays the call to the called side exchange 36, and the ringside tone or guide ring tone or the called party depends on the state of the called terminal with the called side exchange 36 for the relayed call. When the call-based ring tone or the like is transmitted to the interlocking switch 40, the interlocking switch 40 relays the response message to the RBT-IP 61. In other words, a reception channel between the destination exchange 36 and the RBT-IP 61 is configured.

Then, as shown in FIG. 13, the RBT-IP 61 transmits the PSTN 30 through the interworking switch 40 when the data (ringback tone) appropriately corresponding to the response message from the destination exchange 36 is transmitted. Alternatively, to transmit the ring back tone set by the outgoing service subscriber to the outgoing mobile switching center 31, and stop transmitting the ring back tone when an electrical signal other than ringback tone is transmitted, and transmit the transmitted signal through the interlocking switch 40. And transmit to the PSTN 30 or the originating mobile switching center 31. In other words, a receiving channel is configured between the called side exchange 36 and the calling PSTN 30 or the calling mobile switching center 31 via the RBT-IP 61.

In Fig. 14, the call path between the originating PSTN 30 or the originating mobile switching center 31 and the destination exchange 36 is set.

15 to 18 are diagrams for describing a case in which there is no interlocking exchange among channel configurations for detecting a guide ring tone for a ring back tone service subscriber according to a second embodiment of the present invention.

In Fig. 15, when the originating service subscriber terminal 10 or the originating BTS / BSC 21 sends a call to the originating PSTN 30 or the originating mobile switching center 31, the originating PSTN 30 or the originating mobile switching center 31 is called. Indicates that it receives and sends a response message to it. That is, a transmission / reception channel is configured between the originating service subscriber terminal 10 or the originating BTS / BSC 21 and the originating PSTN 30 or the originating mobile switching center 31. Of course, as described above, the outgoing mobile switching center 31 is a mobile switching station connected to the RBT-IP 61. When the calling service subscriber terminal is a mobile communication terminal, the outgoing mobile switching center 31 provides a direct call connection service to the calling service subscriber terminal. It may be a mobile switching station which is interlocked with the mobile switching station.

16, when the originating PSTN 30 or the originating mobile switching center 31 originates a call to the called exchange 36, the called exchange 36 sends a ringback tone or guide ring tone according to the state of the called terminal. When the called party-based ring back tone is transmitted to the calling PSTN 30 or the calling mobile switching center 31, the calling PSTN 30 or the calling switching center 31 relays the response message to the RBT-IP 61. In other words, a reception channel between the destination exchange 36 and the RBT-IP 61 is configured.

Then, as shown in Fig. 17, the RBT-IP 61 sends the calling PSTN 30 or the calling mobile switching center 31 when data (ringback tone) appropriately corresponding to the response message from the called side exchange 36 is transmitted. Transmits the ring back tone set by the calling service subscriber, stops the transmission of the ring back tone when an electrical signal other than the ringback tone is transmitted, and transmits a signal other than the transmitted ringback tone to the calling PSTN 30 or the outgoing mobile switching center 31. Through) transmits to the originating service subscriber terminal 10 or the originating BTS / BSC 21. In other words, a reception channel is configured between the called side exchange 36 and the originating service subscriber terminal 10 or the originating BTS / BSC 21 via the RBT-IP 61.

FIG. 18 shows that a call path between the calling service subscriber terminal 10 or the calling BTS / BSC 21 and the destination exchange 36 is set.

FIG. 19 is a call processing flowchart for explaining a method for detecting a guide ring tone for a call ring tone service subscriber according to a second embodiment of the present invention using the ring tone determination device shown in FIG.

In the second embodiment of the present invention, assuming that the caller is a calling service subscriber, the description of the subscriber authentication routine using a home location register (HLR) in the case of a mobile subscriber is omitted. In addition, the RBT-IP 61 also omits the process of transmitting the data transmitted from the destination side exchange 36 to the connection sound determination device 110 and the result thereof from the connection sound determination device 110.

First, when a call originates from the originating service subscriber terminal, the originating exchange 35 (in this case, if there is an interlocking exchange 40, the interlocking exchange 40 is the originating exchange, and if there is no interlocking exchange 40, the originating PSTN ( 30) or the originating mobile switching center 31 is the originating exchange.) Transmits a circuit connection request message (IAM) for a call connection request to the called side exchange 36 (S210).

As the circuit connection request message (IAM) is received from the originating exchange 35, the called party exchange 36 receives the calling number, the called number and the originating service subscriber terminal location information, etc. included in the circuit connection request message (IAM). On the basis of this, a line connection completion message (ACM), which is a response message for circuit configuration between the called party terminal and the originating service subscriber terminal, is transmitted (S211). At this time, the source side exchange 35 transmits a circuit connection request message (IAM) to the RBT-IP 61 (S212), and receives the circuit connection complete message (ACM) as a response message to the source side exchange 35 , Three paths between the destination exchange 36 and the RBT-IP 61 are established.

When the normal ringback tone is reproduced from the destination exchanger 36 (Case1-1), when the normal ringback tone is transmitted from the destination exchanger 36 (S220), the current state of the called party terminal is normal. The RBT-IP 61 detects this and requests a sound source code to the RBT-SCP 62 (S221). When a response message for the requested sound source code is received (S222), the RBT-IP 61 transmits the calling party. Transmit response message (ANM) for the configuration of the call with the exchange 35 (S223), and transmits the call connection tone set by the calling service subscriber through the call path to the calling exchange (35) (S224).

However, when a signal other than the normal ringback tone is reproduced from the destination side exchange 36 (terminal power off, shadow area, etc.) (Case1-2) (S230), the RBT-IP 61 receiving this is sent from the originating side. When a call release message (Release: REL) is transmitted to cut the established line with the exchange 35 (S231), and a release complete message (RLC) is transmitted from the source exchange 35 (S232), A call path is configured only between the calling side exchange 35 and the called side exchange 36, and a signal other than the RBT reproduced by the called side exchange 36 is transmitted to the calling side exchange 35 (S233).

In the state in which the ring tone is transmitted (S224), when the called party terminal normally responds to the called side exchange 36 (Case2-1), the called side exchange 36 sets up a call with the calling side exchange 35. In response to the incoming response message (ANM) for transmitting (S240), and thus receiving the source exchange 35 receives a release message (Release: REL) to disconnect the RBT-IP (61) RBT-IP (61) and if a Release Complete Message (RLC) is transmitted from the RBT-IP 61 to the source exchanger 35 (S242), the source exchanger 35 and the called party are sent. The call connection between the called party terminal connected to the called party exchanger 36 and the calling service subscriber terminal connected to the calling party exchange 35 is established through the communication path set between the exchanges 36 (S243).

However, when the ring tone is transmitted (S224), the receiver continuously monitors the receiving channel and when a set time elapses and a voice other than the normal ringback tone is transmitted from the called exchange 36 (Case2-2), the called party In the exchange 36, the RBT-IP 61 transmits a guide ring tone for no response (S250), and accordingly, the RBT-IP 61 transmits a release message REL to the calling exchange 35 (S251). ), If the calling exchange 35 transmits a release complete message (RLC) to the RBT-IP 61 (S252), the supply of the ring back tone provided to the calling subscriber terminal through the calling exchange 35 is stopped. And a call path between the called side exchange 36 and the calling side exchange 35 is established so that a guide ring tone for no answer at the called side exchange 36 is sent through the calling side exchange 35, outgoing PSTN 30 or outgoing. The originating service subscriber terminal connected to the mobile switching center 31 is transmitted (S253). The outgoing service subscriber listens to the guidance ring normally and then connects to a voicemail box or releases the outgoing call as necessary.

This second embodiment of the present invention is not only the situation (power off, non-response) when calling a mobile or third-party mobile communication subscriber, but also a ring tone based on a subscriber of a sound source or an incoming service in an ARS in a PSTN. There is an advantage that it is possible to detect all signals provided from the called party such as a service.

In the second embodiment of the present invention, since the ring tone detection unit 112 monitors the call connection sound or the voice, it detects the call connection sound or the voice, and thus the guide connection sound may be cut off within a maximum of 100 ms. It doesn't matter much.

20 is a diagram illustrating a method for detecting a guide ring tone for a subscriber to call connection service according to a third embodiment of the present invention.

The third embodiment of the present invention is a method that can detect a guide connection sound, etc. without distinguishing between the mobile communication network and other mobile communication networks. State, shadow area (out of call right), power off state, etc.) is detected by the called party exchange, and the called party exchange transmits the status information of the called party's terminal to the calling party exchange using the No.7 message. At this time, using one of the No.7 ISUP (ISDN user part) messages currently used in the communication network, for example, a call progress message (CPG), the calling party exchanges the status of the called terminal at the calling party to the calling party. This is a method to check the status of the called terminal at the exchange to determine whether it is configured as a call to RBT-IP, that is, if the called terminal is included in an appropriate part of No.7 message. However, it is preferable to use a CPG message among ISUP messages.

CPG message format of the ISUP message is shown in Table 1.

Furthermore, it is preferable that the called side exchange generates and transmits the state of the called terminal to preliminary parameter values of 07-7F and 17-FF in the CPG message format.

In the third embodiment of the present invention, an embodiment of a call generation to another communication network is shown, which is not much different from the case of an own communication network.

First, when a call originates from an originating service subscriber terminal, the originating exchange 35 transmits a circuit connection request message (IAM) S300 to the gateway system 140 to deliver the call to the destination mobile switching center 34 of another company. The gateway system 140 requests the receiver terminal location information to the home location registerer 50 with reference to the circuit connection request message IAM (Socation Req.).

The home location register 50 receiving the location information request requests a relay to the destination mobile switching center 34 (Route Req.) For the circuit configuration (S302), and the destination mobile switching center 34 receives the home location register 50. Respond to the relay for the local line configuration (Route Res.) (S303). At this time, the destination mobile switching center 34 transmits the status information of the called party terminal, for example, information on whether the subscriber is present, power off the terminal, and the like to the home location register 50.

The home location registerer 50 responds (Location Res.) The location information of the called party terminal to the calling side exchange 35 (S304).

Accordingly, the circuit is configured through the circuit connection request message (IAM) and the circuit connection complete message (ACM) transmission and reception between the gateway system 140 and the destination mobile switching center 34 (S312, S313).

Meanwhile, the gateway system 140 transmits a circuit connection completion message (ACM) to the calling exchange 35 (S305) to configure a circuit between the gateway system 140 and the calling exchange 35 (S305).

Subsequently, a circuit is also configured between the originating exchange 35 and the RBT-IP 61 by transmitting and receiving a circuit connection request message (IAM) and an address complete message (ACM) (S306 and S307).

The RBT-IP 61 requests the sound source code to the RBT-SCP 62 (S308). When a response to the requested sound source code is received (S309), the RBT-IP 61 sends the RBT to the calling exchange 35. -Send an incoming response message (ANM: Answer Message) for the configuration of the call between the IP (61) and the source exchange (35) (S310), and instead of the normal ringback tone, the call connection tone set by the calling service subscriber in advance It transmits to the side exchange 35 (S311). The originating exchange 35 transmits the ring back tone designated by the originating service subscriber through the originating PSTN or the originating mobile switching center to the originating subscriber.

As such, the outgoing service subscriber listens to the designated ring back tone when he or she makes a call. In this case, the state of the called party's terminal is turned off or unresponsive (Case1-1), and the normal response ( Case 1-2).

 The destination mobile switching center 34 transmits a ringback tone or guide ring tone according to the state of the called party's terminal while attempting to connect a call to the called party. The same status information is included in the CPG message and transmitted to the calling side exchange 35 (S320).

The call exchanger 35 interprets the received CPG message and transmits a call disconnection message (REL) to the RBT-IP 61 (S321) when the announcement connection tone is transmitted from the called terminal (S321). IP 61 transmits a release completion message (RLC) to the source exchange 35 (S322) to release the call path between the source exchange 35 and the RBT-IP 61. Therefore, the calling service subscriber stops listening to the ring back tone set by the calling service subscriber.

Subsequently, the destination mobile switching center 34 transmits the state information of the called party terminal (power off state or shadow area (out of call right state), etc.) to the gateway system 140 through the guide ring tone, and the gateway system 140 communicates with itself. The guide ring tone is transmitted to the calling side exchange 35 in which the call path is set (S323). The guide ring tone is transmitted to the calling party subscriber terminal through the calling PSTN or the calling mobile switching center.

However, in case of normal response (Case1-2), when the called party responds normally without a separate message from the destination mobile switching center 34, the response message (ANM) from the destination mobile switching center 34 is transmitted to the calling side exchange 35. Is transmitted (S330), the originating exchange 35 transmits a call teardown message REL to the RBT-IP 61 according to the received response message (ANM) (S331), and receives the RBT-IP (61). ) Transmits the release completion message (RLC) to the calling exchange 35 (S332) to release the call path between the calling exchange 35 and the RBT-IP 61, and the call is exchanged with the calling exchange 35. The call between the calling party terminal and the called party terminal is connected through the established communication path between the switching stations 34 (S333).

The third embodiment of the present invention can be applied to any mobile communication network without distinguishing between children and others. However, when the PSTN is connected to an automatic answering service (ARS) using a private exchange (PBX), the detection of the guide ring tone reproduced without a message is applied as a prefix (such as country code, service type number, and international recognition number at the destination). One or more numbers prefixed to the telephone number) can be used to listen to the voice message from the called party by preventing the subscriber from registering the calling service based on the calling service subscriber. .

In the third embodiment of the present invention, the application to the company's communication network is not a problem, but when transmitting to other mobile communication networks, the CPG should be added to the interworking standard message. That is, it can be processed by adding the interworking message specification between the incoming / outgoing.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

As described above, the present invention has the effect that the outgoing service subscribers who subscribe to the outgoing service subscriber-based ring back tone service can listen to the ring back tone or other ring tone (middle tone) provided by the called party according to the called party's situation. There is.

1 is a view for explaining the basic concept of a general ring tone service

2 and 3 is a view showing a service system for a ring back tone service according to the prior art

4 is a view for explaining a ring back tone service system according to the present invention.

5 is a call processing flowchart illustrating a method for detecting a guide ring tone for a subscriber to call connection service according to the first embodiment of the present invention.

6 and 7 are diagrams showing a service system configuration for explaining a ring back tone service process according to the prior art;

8 and 9 are diagrams illustrating a service system configuration for describing a ring back tone service process according to a second embodiment of the present invention.

FIG. 10 is a diagram for describing the service system configuration shown in FIGS. 8 and 9 in more detail.

11 to 14 are views for explaining in detail the channel configuration for detecting a guide ring tone for a ring-tone service subscriber according to a second embodiment of the present invention;

15 to 18 are diagrams for explaining a case in which there is no interlocking exchange among channel configurations for detecting a guide ring tone for a ring back tone service subscriber according to a second embodiment of the present invention;

19 is a call processing flowchart for explaining a method for detecting a guide ring tone for a call back tone service subscriber according to a second embodiment of the present invention using the ring tone discriminating apparatus shown in FIG.

20 is a call processing flowchart for explaining a method for detecting a guide ring tone for a call back tone service subscriber according to a third embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10, 11: subscriber to originating service 12, 13, 14: called party

35: calling side exchange 36: called side exchange

40: interlock exchange 50: home location register

60: sound source providing device 61: call connection sound providing means (RBT-IP)

62: RBT service control means (RBT-SCP)

110: connection sound discrimination device 111: trunk interface unit

112: beep detection unit 113: processor unit

120: calling party communication network 130: called party communication network

140: gateway system (GS)

Claims (30)

When a call originates from the terminal of the originating service subscriber who set a specific sound source as a ring tone, Checking the state of the called terminal; And when the state of the called terminal is to transmit a guide ring tone other than a normal ringback tone, transferring the guide ring tone to a terminal of an outgoing service subscriber instead of the preset ring back tone. 2. The ring back tone service according to claim 1, wherein the called terminal state is at least one of a state of being connected to a private exchange which transmits a guide ring tone automatically set upon power off, shadow area presence, no answer, during a call, and a call. Way. The method of claim 1 or 2, wherein the checking of the state of the called terminal comprises: Call ring tone service method characterized in that performed using the status information of the called terminal recorded in a predetermined position of the communication network for providing a communication service to the calling terminal and the called terminal. The method of claim 3, wherein the checking of the state of the called terminal comprises: Call ring tone service method, characterized in that using the status information of the called terminal identified by the home location register connected to the called terminal. 5. The method of claim 4, wherein the state of the called terminal is checked using a manufacturing automation protocol (MAP). The method of claim 5, wherein the checking of the state of the called terminal comprises: Requesting to check a state of the called terminal to a home location register connected to the called terminal, and transmitting the check result to the calling exchange. 6. The call exchange according to claim 5, wherein the calling side exchange, which has received the status information of the called terminal from the home location register, If the state of the called terminal is a state of generating a guide ring tone other than a normal ringback tone, providing the guide ring tone transmitted from the called side exchange to the calling party subscriber terminal. A ring back tone service method, characterized in that provided to the originating service subscriber terminal. 8. The method of claim 7, wherein, after providing the ring back tone to the calling service subscriber terminal, the called terminal does not respond within a set time. The destination exchange requesting a relay to the home location register before connecting to a voice mail service for a call generated at the originating service subscriber terminal; and wherein the home location register transmits the relay information to the originating exchange. And stopping providing the ring back tone to the calling side exchange, and transmitting a guide ring tone transmitted from the called side exchange to the calling party subscriber terminal. 9. The method according to claim 8, wherein the calling exchange is an originating exchange or an interchanging exchange comprising the mobile switching station, and the called exchange is at least one of a terminating mobile switching station, a public land mobile communication network, or a Taidong switching network. Ring-tone service method. The method of claim 1 or 2, wherein the checking of the state of the called terminal comprises: The ring back tone service method, characterized in that to use the electrical characteristics of the signal transmitted from the destination side exchange to provide a communication service to the called terminal. The method of claim 10, wherein the electrical characteristics of the transmitted signal are used. And determining the state of the called terminal using the frequency of the signal transmitted from the called side exchange providing the communication service to the called terminal. 12. The method of claim 11, wherein the signal transmitted from the called terminal is transmitted to the calling terminal through a call connection tone providing means for providing the call connection tone. The method of claim 11 or 12, wherein the checking of the state of the called terminal comprises: The originating exchange receiving the call originating from the terminal of the originating service subscriber, constructing a circuit with a called exchange to relay the call and a ring back tone providing means; a signal transmitted from the called exchange through the configured circuit; Determining the state of the called terminal using the; If a signal other than a ringback tone is transmitted from the called exchange according to the determination result, the line established between the ring back tone providing means and the calling exchange is disconnected, and the called exchange and the calling exchange are connected to each other. A signal is transmitted from the called exchange to the calling party subscriber terminal when a line is established between the calling party and the caller terminal. A ring back tone service method, characterized in that a ring back tone is provided. 15. The method of claim 13, wherein if the called terminal does not respond within a predetermined time, the called-side exchange generates an unanswered guide ring tone to the ring back tone providing means, and the ring back tone providing means receiving the non-answered guide ring tone is transmitted. Requesting a line disconnection with the calling side exchange, the calling side exchange cuts off a line with the call connection sound providing means and stops providing the ring back tone provided to the calling service subscriber terminal; And transmitting the non-answering guide ring tone to the calling service subscriber terminal through the calling exchange through a set line of the calling side exchange period. The method of claim 13, wherein the signal other than the ringback tone comprises one of a guide ring tone, a call-based ring tone, and a ring tone. 13. The terminal of claim 12, wherein the calling side exchange is one of an outgoing public switched telephone network, an outgoing mobile switching center, or an interlocked exchange including the mobile switching center, and the called side switching exchange is a terminating public switched telephone network, a terminating mobile switching center, a public land mobile communication network. Or at least one of a tie-dong switching network. The method of claim 1 or 2, wherein the checking of the called terminal state comprises: And ringing the terminal terminal state information in a specific area of a signal transmitted from a called side exchange that provides a communication service to the called terminal, and using the same. 18. The method of claim 17, wherein the specific area of the signal is a specific area of the No. 7 message. 19. The method of claim 18, wherein the specific area of the No.7 message uses a preliminary parameter area of the call progress message. 20. The method of claim 19, wherein the checking of the state of the called terminal comprises: Detecting status information of the called terminal obtained while performing a call connection for the call generation from the called terminal to the called terminal, and converting the detected status information into the preliminary parameter value of the call progress message. And transmitting the ring back tone to the calling exchange providing the ring back tone. 21. The method of claim 20, wherein the calling exchange is at least one of an outgoing public switched telephone network, an outgoing mobile switching center and an interworking exchange, and the called exchange is at least one of a terminating public switched telephone network, a terminating mobile switching center, and a public land mobile communication network. Ring back tone service method characterized in that. The method of claim 20, wherein the checking of the state of the called terminal comprises: When the call originates from the terminal of the originating subscriber, the originating exchange requesting the destination location information of the called terminal to a home location register to configure a line and a ring tone providing means to play the ring back tone with the called side exchange to relay the call; Playing the ring back tone to the calling service subscriber terminal through the call ring tone providing means, and checking the state information of the called terminal while the called side exchange attempts to make a call to the called terminal. If the state information of the called terminal is not normal according to the result of the check, including the state information of the called terminal in a set message and transmitting the state information to the calling exchange, and the calling exchange is connected with the ring back tone providing means. Disconnect the circuit, and transmit the announcement connection sound transmitted from the called exchange to the calling party subscriber terminal; If the incoming response message is transmitted from the called exchange within the set time when the status information of the called terminal is normal, the calling exchange disconnects the line with the ring back tone providing means and connects the calling service subscriber terminal with the called terminal period. The ring-tone service method, characterized in that comprises a step. 23. The method of claim 22, wherein the set message includes whether the called terminal is in a power off state or a transliteration region. 23. The method of claim 22, wherein the calling side exchange does not form a line with the ring back tone providing means when the called terminal is not a communication subscriber station. 23. The method of claim 22, wherein the calling party exchange is an interworking exchange comprising an outgoing mobile switching center or the outgoing mobile switching center, and the called side switching exchange is at least one of a terminating mobile switching center, a public land mobile communication network, or a Taidong switching network. Ring tone service method. A sound source providing device for storing and managing a sound source to be provided as a ring tone to a calling service subscriber; And a connection sound discrimination device configured to check a state of a called terminal that the calling service subscriber attempts to make a call, so that the sound source providing device provides a preset sound source or a guide connection sound according to the state of the called terminal. Ring tone service system. 27. The system of claim 26, wherein the ring tone determination device is a switch, and the switch checks the state of the called terminal in a home location register in which state information of the called terminal is recorded. 28. The system of claim 27, wherein the ring tone determination device is a separate device that checks a state of the called terminal by using an electrical signal transmitted from the called terminal. 29. The apparatus of claim 28, wherein the connection sound determination device comprises: a trunk interface unit for receiving an electrical signal transmitted from the call connection tone providing unit and transmitting the signal to a beeper detection unit; And a processor for detecting a frequency of the received signal and transmitting the signal to the processor, and a processor for transmitting data on whether the call is sound or voice according to the frequency detected by the signal to be detected. Ring back tone service system. 28. The apparatus of claim 27, wherein the ring tone determination device is an exchange, and a called party exchange of the exchanges calls information of the called terminal obtained while performing a call connection to the called terminal according to a call attempt from the calling service subscriber terminal. Included in the progress message and sent to the calling side exchange, the calling side exchange using the call ring tone service system, characterized in that for grasping the state of the called terminal.