KR20040086063A - Alternation tone service method for call waiting occurrence in asynchronous mobile telecommunication system - Google Patents

Abstract

PURPOSE: A ring back tone service method in an asynchronous mobile communication system is provided to generate various ring back tones by using an intelligent network standard only in a mobile communication system. CONSTITUTION: When a call is originated from an originator terminal(11), an MSC(12) transmits a sense message to an SCP(Service Control Point)(14), and the SCP(14) confirms whether a ring back tone service is registered(201-204). If so, the SCP(14) requests the MSC(12) to separate call legs such that an originating leg and a receiving leg can be included in different call management parts(205,206). The MSC(12) performs a paging and alerting process, and a ring back tone IP(15) transmits a predetermined ring back tone through the originating leg(207-211). When a call response is received, the MSC(12) informs the SCP(14) of the response(212-214). The SCP(14) commands the transmission of the ring back tone to be stopped while requesting the MSC(12) to move the call legs, and establishes a call between the originator terminal(11) and a receiving terminal(16)(215-218).

Description

Alternate tone service method for call waiting occurrence in asynchronous mobile telecommunication system}

The present invention relates to a computer-readable recording medium recording a program for realizing ring back tone service method and the method in the asynchronous mobile communication system, more particularly to a ^{3GPP (3 rd Generation Partnership Projects)} GSM ( In the asynchronous mobile communication system such as Global System for Mobile communication (WD-CDMA) or Wideband Code Division Multiple Access (W-CDMA), the intelligent network standard is generated by generating various ring back tone (music, sound effects and other sound sources) using the intelligent network standard. As long as the following equipment is used, this service can be provided without unnecessary function change.

Conventionally, when a caller attempts a telephone call to a called party (when calling a call), the exchange provides a uniform ring back tone (ring tone) from the exchange to the calling terminal.

As a solution to this problem, when a caller calls a called party in a mobile phone or a general phone, various ring back tones (colored ring back tones) are made before the call is connected instead of a uniform ring back tone. It is provided by a terminal to satisfy various needs of service users.

First, as an example of the prior art for implementing the RBT service, when the caller attempts to make a telephone call (when calling), the exchange controlling the called party is defined to send the same RBT to all subscribers according to the ITU-T standard. By implementing the function of the exchange through the function change only for the ring back tone service, there is a way to provide the present service.

However, this technology does not use the international standard that can be used universally and implements the function by defining a private specification only for the exchanges of a specific company operated by a specific telephone company in its service network. In order to implement this service for each telephone service provider, a lot of time and cost are required repeatedly for separate specification definition, change of exchange function, test and application. In addition, even in the case of an operator currently providing the service using this technology, if an exchange other than the existing exchange is introduced, an additional time and cost for implementation is required to provide the service. do.

On the other hand, as another example of the prior art for implementing a ring-tone service, the US TIA (Electronic Industry Association) / EIA (Electronic Industry Association) used as an intelligent network standard in the CDMA mobile telephone network based on the North American mobile network standard IS-41C This service is provided by applying the standard defined in WIN (Wireless Intelligent Network) of TR-45.2. When the exchange detects the progress of the call processing for the ring back tone service during the call processing process to provide the general ring back tone defined in ITU-T, it analyzes the analyzed information defined in the WIN standard. : Calling to Service Control Point to determine ring back tone preselected by incoming subscriber, and then providing ring back tone to caller through interaction with intelligent information device (i.e. Intelligent Peripheral). .

However, this technology is only limited to CDMA mobile phone providers that are provided with WIN, the intelligent network standard for mobile phone network standards in North America, so that the European GSM network, which is used by more than 80% of mobile phone operators worldwide, Since CAMEL (Customized Application for Mobile Enhanced Logic), which is an intelligent network standard, is used, it is impossible to realize this service using this technology using the WIN standard. Even if the North American IS-41C mobile telephone network provides the WIN standard, the interpretation information sent to the service controller (SCP) for processing the ring back tone service by the exchange used in this technology is based on the WIN standard. There is a problem that cannot be realized by Terminating Basic Call State Model (T_BCSM), and call leg separation technology in the exchange, which is a key technology element for ring tone service, and general call to incoming subscriber using the same Since the technique for simultaneous call processing is not defined, only the process of transmitting the ring back tone to the caller is described. Therefore, in order to implement the ring back tone service according to the WIN standard specification, many functions to be additionally defined and implemented are required. There is a problem that is difficult to use and exist.

As described above, in the case of the ring-tone service of the existing network, when the exchange determines whether the incoming subscriber subscribes to the service and subscribes to the service, the exchange provides the service based on a method that does not comply with the standard, so that the service provider can later develop the service. Since the development of the exchanger and other equipment is inevitable, a separate time and cost were additionally required.

The present invention has been proposed to solve the above problems, and generates various call connection sounds (music, sound effects, and other sound sources) using only an intelligent network standard in an asynchronous mobile communication system such as 3GPP GSM or W-CDMA. It is an object of the present invention to provide a ring back tone service method for providing the present service without unnecessary function change using a device conforming to the intelligent network standard, and a computer readable recording medium recording a program for realizing the method.

1 is an exemplary configuration diagram of a mobile communication system to which the present invention is applied.

2 is a flowchart illustrating a call processing process when an incoming service subscriber answers a call by calling a caller to a called service subscriber in the method of ringing tone service according to the present invention.

3 is a flowchart illustrating a call processing process when a caller does not answer a call by calling a caller to a caller service subscriber according to the present invention.

Figure 4 is an embodiment of a call processing process when the caller terminates the call while the caller is calling to the incoming service subscriber in the call ring tone service method according to the present invention to call the incoming service subscriber (alerting) Flowchart.

* Explanation of symbols on the main parts of the drawing

11: originating terminal 12: exchange (MSC)

13: Home Location Register (HLR) 14: Service Controller (SCP)

15: call back provider (IP) 16: called terminal

In order to achieve the above object, the present invention relates to a ring back tone service method in an asynchronous mobile communication system, wherein, when a call is originated from an originating party, an exchange transmits a sensing message to a service controller (SCP), A first step of confirming whether the called party subscribes to the RBT service; A second step in which the SCP, which recognizes that the called party has subscribed to a ring back tone service, requests separation of a call leg from the exchange, separating the calling leg and the called leg so that they belong to different call management parts; And at the SCP, the exchange performs paging and alerting to the called party through the called leg, and a ring back tone provider (IP) is predetermined to the calling party through the calling leg. And a third step of transmitting the ring back tone.

In addition, the present invention provides a fourth step of providing the predetermined ring back tone to the calling party and in the paging and call notification process to the called party, when the call response from the called party, the exchange informs the SCP the incoming response; And the SCP commanding transmission of the predetermined ring back tone to the IP, requesting a call leg movement to the exchange, and moving the called leg to the calling party's call management part. It further comprises a fifth step of establishing a call between.

In addition, the present invention provides the predetermined ring back tone to the calling party and during the paging and call notification to the called party, when the call is not answered from the called party for a predetermined time (no answer), the exchange calls the SCP. A fourth step of notifying of no response; And a fifth step of the SCP requesting the call to be released to the exchange to terminate the call between the called party.

In addition, the present invention provides the predetermined ring back tone to the calling party and in the paging and call notification process to the called party, when the call is terminated at the calling party before answering the called party, the exchange is an abnormal call to the SCP Informing a fourth step; And a fifth step of the SCP requesting the call to be released to the exchange to terminate the call between the called party.

Meanwhile, the present invention provides an asynchronous mobile communication system having a processor for a ring back tone service using an intelligent network, and when a call is originated from an originating party, an exchange transmits a detection message to a service controller (SCP), thereby providing the SCP. A first function of checking whether the called party subscribes to a ring-tone service at the called party; A second function for the SCP, which recognizes that the called party has subscribed to a ring back tone service, to request a call leg separation to the exchange, separating the calling leg and the called leg so that they belong to different call management parts; And at the SCP, the exchange performs paging and alerting to the called party through the called leg, and a ring back tone provider (IP) is predetermined to the calling party through the calling leg. A computer readable recording medium having recorded thereon a program for realizing a third function of transmitting a ring back tone of an apparatus is provided.

The present invention also provides a fourth function of providing the predetermined ring back tone to the calling party and in the paging and call notification process to the called party, when the call is answered from the called party, the exchange notifies the SCP of the incoming response; And the SCP commanding transmission of the predetermined ring back tone to the IP, requesting a call leg movement to the exchange, and moving the called leg to the calling party's call management part. A computer readable recording medium having recorded thereon a program for further realizing a fifth function of establishing a call therebetween.

In addition, the present invention provides the predetermined ring back tone to the calling party and during the paging and call notification to the called party, when the call is not answered from the called party for a predetermined time (no answer), the exchange calls the SCP. A fourth function of notifying no response; And the SCP requesting the call release to the exchange, to provide a computer-readable recording medium having recorded a program for further realizing a fifth function of terminating the call between the called party.

In addition, the present invention provides the predetermined ring back tone to the calling party and in the paging and call notification process to the called party, when the call is terminated at the calling party before answering the called party, the exchange is an abnormal call to the SCP Informing a fourth function; And the SCP requesting the call release to the exchange, to provide a computer-readable recording medium having recorded a program for further realizing a fifth function of terminating the call between the called party.

The present invention utilizes a variety of ring tones (music, sound effects, and other sound sources) by using some operations and call processing models defined in the Camel Phase 4 of the CAME standard, which is an intelligent network standard in GSM or W-CDMA 2nd and 3rd generation telephone networks. In particular, the service provider can provide the service only with equipment that meets the CAMEL standard, so that the service provider can provide the service without additional function change or additional equipment construction of the communication network equipment including the exchanger. In addition, it provides a wide range of extensibility to provide various services having service characteristics (call leg control) similar to the present service.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a configuration of a mobile communication system to which the present invention is applied, and asynchronously such as 3GPP GSM or W-CDMA capable of generating various call connection sounds (music, sound effects, and other sound sources) to a caller using an intelligent network standard specification. The configuration of the mobile communication system of the system is shown. This implements the ring back tone service with minimal changes to the network components.

The present invention generates various call connection sounds (music, sound effects, and other sound sources) by using only the intelligent network standard in the GSM or W-CDMA type 2 and 3 generation telephone network, so that the service is not changed without unnecessary functions when the equipment conforming to the intelligent network standard is used. Can be provided.

In order to provide the intelligent network service, the mobile switching center (MSC) 12, the service controller (SCP) 14, and the special resource manager (i.e., the ring back tone provider) (IP) 15 are each CAMEL. Has the function to support the specification.

In FIG. 1, "CAP" is a part which interoperates using a CAMEL Application Protocol, and "MAP" is a part which interoperates with a mobile application protocol.

The called terminal 16 is a mobile communication terminal such as a personal digital assistant (PDA), a handheld PC, a notebook, a cellular phone, or a personal communication service (PCS) phone, which the user can carry and carry on voice communication. Mobile station (MS) including next-generation mobile communication terminal such as GSM phone or W-CDMA phone, which uses forward channel for incoming calls and reverse channel for outgoing calls. In particular, when the caller attempts to make a phone call (when calling), a voice call is possible with the calling terminal 11 through the mobile communication network. However, it is assumed here that the terminal is subscribed to the ring-tone service.

The calling terminal 11 may be a general PC, a wired or wireless telephone, a mobile phone (MS), or the like, and a voice call is made with the called terminal 16 through a mobile communication network. Of course, when the calling terminal 11 is a general PC or a wired or wireless telephone, it is connected to a mobile communication network through a public switched telephone network (PSTN).

In general, a mobile communication network includes a base station transceiver subsystem (BTS) (not shown), a base station controller (BSC) (not shown), an exchanger (MSC) 12, and the like. do.

The base station (BTS) connects a mobile station (MS) 11 and 16 to a base station controller (BSC), and a digital channel unit (DCU) and a time / frequency control unit (TCU: Timing / Frequency). Control Unit), Radio Frequency Unit (RFU) and Global Positioning System (GPS). In addition, the base station (BTS) performs a wired / wireless conversion function of communicating with the originating and receiving mobile telephone (MS) 11, 16 over the air and communicating with the base station controller BSC by wire.

The base station controller (BSC) connects a base station (BTS) to an exchange (MSC) 12 to coordinate the connection between the base stations (BTS), and signal processing for communication between the base station (BTS) and the exchange (MSC) 12. Perform the function.

On the other hand, the MSC 12 interworks with a home location register (HLR) 13, a service controller (SCP) 14, and a ring back tone provider (IP) 15 to call a mobile subscriber. Process. In addition, the exchange 12 is connected to the base station controller BSC to perform call setup and release functions of the MS 11 and 16, and performs various functions related to call processing and additional services.

The home location register (HLR) 13 is a database that is connected to an exchanger (MSC) 12 and a service controller (SCP) 14 to manage various information of mobile subscribers. It performs the functions such as registration of subscriber's location by interworking, and saves the caller's mobile phone (MS) 11 and 16 and the subscriber's permanent information and location information, and interacts with MSC 12 to call. It supports various functions related to processing and additional services. In particular, the home location register (HLR) 13 notifies the switch (MSC) 12 of the location and service registration information of the mobile telephone (MS) 11, 16 by using a wireless application protocol (MAP), The exchange 12 (MSC) 12 to obtain information that can determine whether the intelligent network service has occurred.

The service controller (SCP) 14 is a device for service control in a mobile communication network.

The ring back tone provider (IP) 15 has special resources such as voice guidance, dual tone multi-frequency tone collection, voice recognition, and the like, and services using the special resources in connection with the service controller (SCP) 14. To provide.

For this ring back tone service, the switch 12 (MSC) 12 notifies the service controller (SCP) 14 of the call using the Camel Application Protocol (CAP) when a call is determined to be an intelligent network service, and the service controller (SCP). Call processing control from (14).

When attempting to provide sound resources such as announcements or tones to the mobile telephone (MS) 11, 16, the service controller (SCP) 14 provides the ring back tone provider (IP) 15 to the exchange (MSC) 12. Request a connection to the call), the exchange 12 (MSC) 12 establishes a call path with the ring back tone provider (IP) 15 using the ISDN User Part (ISP), and the ring back tone provider (IP) 15 Provides a response to the connection request to the service controller (SCP) 14.

In order to perform the RBT service through the intelligent network, a call party handling function capable of controlling the call parties of the call is essential, and the function thereof is called CAMEL Phase 4 Defined in In the present invention, by applying the Camel Phase 4 (CAMEL Phase 4) standard to the interface represented by the CAP (CAMEL Application Protocol), it is possible to perform a ring tone service using an intelligent network. That is, in the present invention, when generating the ring back tone by using the intelligent network standard operation, the Camel step 4 (between the exchange (MSC) 12, the service controller (SCP) 14, and the ring back tone provider (IP) 15) CAMEL Phase 4) Some of the functions related to call leg control are used. This is outlined as follows.

First, when an incoming call attempt to a subscriber registered in the ring back tone service occurs, the switch (MSC) 12 transmits an initial detection point notification (IDP: InitialDP) message to the service controller (SCP) 14. Then, the service controller (SCP) 14 queries the subscriber database and sends a call leg split (SL: SplitLeg) message to the exchange (MSC) 12 when the called party is determined to be a ring back tone service subscriber. The calling leg and the calling leg belong to different call segments.

Subsequently, the switch (MSC) 12 separates the leg, and then connects the call ring tone provider (IP) 15 in which the call ring tone is recorded to the calling leg. Make a ring tone sound. At the same time, a call proceeds to the called leg using a Continue With Argument message. In this way, the ring back tone is sent to the calling party, and the called party continues the call progress. When the called party answers in this state, the calling party and the called party are reconnected by moving the called leg to the calling party call segment using a call leg message.

Then, a call processing process using the CAMEL Phase 4 when the caller sends a call to the incoming service subscriber through the call response through FIG. 2 will be described.

First, when a caller attempts to make a telephone call to a ring back tone subscriber (ie, call origination) 201, the switch 12 (MSC) 12 notifies the service controller (SCP) 14 of the first detection point (IDP: InitialDP). Transmit a message (202). In this case, the IDP parameter may be set as follows, but the present invention is not limited thereto, and it is obvious that the contents of the parameter used may be changed according to the operator.

Then, the service controller (SCP) 14 queries the subscriber database (203) to obtain whether the service is available and the message ID on the ring back tone provider (IP) 15. In order to observe the progress of the call, a basic call model event report (RRB: Request Report BCSM Event) message is transmitted to the switch 12 (MSC) 12 to set a basic call model (BCSM) event. )do. The RRB parameters are as follows.

In addition, the service controller (SCP) 14 transmits a call leg split (SL) message to the exchange (MSC) 12 (205), and requests the separation of the call leg (call leg). On the other hand, the MSC 12 moves the leg 2 corresponding to the call leg of the called party to a new call segment 2. SL parameters are as follows.

Subsequently, the exchange (MSC) 12 sends a call leg split acknowledgment (SLack) message to the service controller (SCP) 14 when the leg separation succeeds (206).

Then, the service controller (SCP) 14 sends an IP connection request (ETC: Establish Temporary Connection) message to the switchboard (MSC) 12 (207) to make a call with the caller (caller corresponding to call leg 1). Connection tone provider (IP) 15 requests to connect. The setting of the ETC parameter may be set as follows, but the present invention is not limited thereto, and it is obvious that the contents of the parameter used may be changed according to the operator.

Subsequently, upon receiving a connection request with the service controller (SCP) 14 from the exchange (MSC) 12 through the ISUP (208), the ring back tone provider (IP) 15 receives an Assist Request Instructions (ARI) message. Is transmitted to the service controller (SCP) 14 (209), thereby making a direct connection between the service controller (SCP) 14 and the ring back tone provider (IP) 15. The ARI parameters are as follows:

In response to this, the service controller (SCP) 14 transmits the message ID obtained through the database inquiry to the ring back tone provider (IP) 15 by loading the announcement announcement (PA: Play Announcement) message (210). The provider (IP) 15 transmits the ring back tone, which is stored in itself, to the caller who originated the call to the called service subscriber (211). PA parameters are as follows.

Then, the ring back tone provider (IP) 15 requests the caller to transmit the ring back tone using the announcement broadcast (PA) message (210), and the ring back tone provider (IP) 15 calls the calling terminal 11. When transmitting a ringing tone (211), the service controller (SCP) 14 sends a call with (CWithArg: Continue With Argument) message to the switching center (MSC) 12 (212), the continuous call progress to the called party Let this be done. That is, according to the call progress message, the MSC 12 performs paging and alerting on the called party. The CWithArg parameter is as follows:

or

If the caller sends a call to the incoming service subscriber and listens to the ring back tone (at this time, performs paging and call notification to the called party), when the called party answers the call (213), the exchange (MSC) 12 A call response event (tAnswer) event is transmitted to the service controller 14 using the basic call model event report (SMSM) message (that is, notification of the call subscriber's call response) (214). The parameters used at this time are as follows.

In response to this, the service controller (SCP) 14 confirms the answer of the called party, and then sends a Disconnect Forward Connection With Argument (DFCWithArg) message to the MSC 12. By sending (215), the switch 12 (MSC) 12 to request the disconnection with the ring back tone provider (IP) 15 that is sending out the ring back tone to the calling terminal 11 (216), 11) stops the transmission of the ring back tone that is being provided. The DFCWithArg parameter is as follows:

In this way, when the call is answered at the called party, the transmission of the ring tone to the calling terminal 11 is stopped, and the service controller (SCP) 14 sends a call leg move (MvL) message to the switch (MSC) 12. Transmit (217), the originating leg and the destination leg are connected by moving the called leg to the Call Segment 1 at the exchange (MSC) 12. At this time, a call path between the calling terminal 11 and the called terminal 16 is established. MvL parameters are as follows.

Subsequently, the MSC 12 transmits a call leg move acknowledgment (MvLack: Move Leg ack) message to the service controller (SCP) 14 when the leg is successfully moved (218).

Meanwhile, referring to FIG. 3, a call processing process when a caller sends a call to an incoming service subscriber and the incoming service subscriber does not answer is as follows.

In FIG. 3, a caller sends a call to an incoming service subscriber, provides a ring back tone to the caller who has called the incoming service subscriber, and performs paging and call notification to the called terminal 16 (301 to 312). Is the same as step "201" to step "212" of FIG.

Therefore, in the process of paging and call notification to the calling terminal 16, the exchange (MSC) 12 is set up to provide a ring back tone to the caller who has made a call to the called service subscriber through steps "301" through "312". If the called party does not answer until the timer expires (313), after waiting for the called party's call response until the time determined by the NoAnswer time-out (for example, 10 ringing tones), the default is Using a Model Call Report Event Report (BCSM) message, a tNoAnswer (terminating No Answer) event is transmitted to the service controller (SCP) 14 (that is, a notification of a call subscriber's call not answered) (314). . The parameters used at this time are as follows.

In response, the service controller (SCP) 14 requests the end of the call by sending a Release Call (RC) message to the exchange (MSC) 12 (315). This ends the call between the originator and the called party. RC parameters are as follows.

On the other hand, there may be a case in which the caller terminates the call while the caller sends a call to the incoming service subscriber, and the caller is trying to call the incoming service subscriber. Referring to FIG. Same as

In FIG. 4, a procedure in which the caller sends a call to the incoming service subscriber, provides a ring back tone to the caller who has called the incoming service subscriber, and performs paging and call notification to the called terminal 16 (401 to 412). 2 is the same as steps "201" to "212" of FIG. 2 and steps "301" to "312" of FIG. 3.

However, in the process of paging and call notification to the calling terminal 16 and providing a ring back tone to the caller who has made a call to the called service subscriber through steps 401 to 412, the call is received from the MSC 12. If no answer (tAnswer) or tNoAnswer message is received (i.e., a call attempt is made to the terminating service subscriber and the caller terminates the call first before the called party answers) (413), the exchange (MSC) (12) recognizes that the call is not normal because the caller has already released the call, and then the tAbandon event to the service controller (SCP) 14 using an Event Report BCSM message. (Ie, notifying the caller that the call was terminated) (414). The parameters used at this time are as follows.

In response, the service controller (SCP) 14 requests the end of the call by sending a Release Call (RC) message to the exchange (MSC) 12 (415). This ends the call between the originator and the called party. RC parameters are as follows.

The present invention as described above can be used not only for the ring back tone service by the subscriber, but also for the ring back tone service by the service provider or the advertisement provider.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention is realized by using the call leg control function of the intelligent network standard, so that a communication operator operating equipment implementing the corresponding function of CAMEL Phase 4 implements an additional additional function or equipment. There is an effect that it is possible to easily implement a variety of value-added services having a ring back tone service or similar service characteristics without the introduction of time and cost without introducing.

Claims (11)

In a call ring service method of an asynchronous mobile communication system, When the call is originated from the calling party, the exchange sends a detection message to a service controller (SCP) to confirm whether the called party subscribes to the ring back tone service in the SCP; A second step in which the SCP, which recognizes that the called party has subscribed to a ring back tone service, requests separation of a call leg from the exchange, separating the calling leg and the called leg so that they belong to different call management parts; And At the SCP, the exchange performs paging and alerting to the called party through the called leg, and a ring back tone provider (IP) is predetermined to the calling party through the calling leg. Third step to send ring back tone RBT service method in an asynchronous mobile communication system comprising a. The method of claim 1, Providing a predetermined ring back tone to the calling party and in the paging and call notification process to the called party, in response to a call from the called party, the exchange notifying the SCP of an incoming response; And The SCP commands the IP to suspend transmission of the predetermined ring back tone, requests a call leg to be transferred to the exchange, and moves the called leg to the calling party's call management part. 5th step to establish a currency A ring tone service method in the asynchronous mobile communication system further comprising. The method of claim 2, The fifth step, A sixth step of, after the SCP confirms the response from the called party, sending a disconnection message with the IP (DFCWithArg) to the exchange; A seventh step of requesting, by the exchange, to stop transmission of the ring back tone to the calling party by the IP; The SCP transmits a call leg shift (MvL) message to the exchange, which moves the called leg to the call segment 1 at the exchange, whereby the calling leg and the calling leg ( an eighth step of establishing a communication path between the call destinations by connecting leg); And A ninth step in which the exchange transmits a call leg movement acknowledgment (MvLack) message to the SCP when the leg is successfully moved; RBT service method in an asynchronous mobile communication system comprising a. The method of claim 1, Providing a predetermined ring back tone to the calling party, and during a paging and call notification to the called party, when the call is no answer from the called party for a predetermined time, the exchange informs the SCP of the non-answering call; step; And A fifth step in which the SCP requests the call to be released to the exchange to terminate the call between the called party; A ring tone service method in the asynchronous mobile communication system further comprising. The method of claim 1, Providing a predetermined ring back tone to the calling party and in the paging and call notification process to the called party, in response to the calling party ending the call at the calling party before answering the called party, informing the exchange that the exchange is an abnormal call to the SCP; And A fifth step in which the SCP requests the call to be released to the exchange to terminate the call between the called party; A ring tone service method in the asynchronous mobile communication system further comprising. The method according to any one of claims 1 to 5, In the ring back tone service, After the leg is separated using the leg leg message of the Camel standard of the Camel standard, which is an intelligent network standard, the announcement or tone is transmitted to the calling party and the call is called to the called party. Continue to proceed, the ring back tone service method in the asynchronous mobile communication system, characterized in that to combine the leg by using the leg (Move Leg) message in the response. The method of claim 6, The third step, In response to the call leg separation request of the SCP, the exchange transfers the leg 2 corresponding to the call leg of the called party to a new call segment 2, and the leg Transmitting a call leg detachment (SLack) message to the SCP when the detachment is successful; An eleventh step, wherein the SCP sends an IP connection request (ETC) message to the exchange, requesting an IP connection with a caller (calling party corresponding to call leg 1); A twelfth step of the IP receiving the connection request from the exchange to the SCP sending a connection response (ARI) message to the SCP, so that a direct connection between the SCP and the IP is made; A thirteenth step in which the SCP sends a message ID obtained through a database inquiry to an IP by transmitting a message broadcast transmission (PA) message to the IP, so that the IP transmits the predetermined ring back tone to the calling party; And Step 14, wherein the SCP sends a call progress (CWithArg) message to the exchange to allow continuous call progression to the called party; RBT service method in an asynchronous mobile communication system comprising a. In the asynchronous mobile communication system having a processor for a ring tone service using an intelligent network, A first function of, upon sending a call from the calling party, the exchange sending a detection message to a service controller (SCP) to confirm whether the called party subscribes to a ring back tone service in the SCP; A second function for the SCP, which recognizes that the called party has subscribed to a ring back tone service, to request a call leg separation to the exchange, separating the calling leg and the called leg so that they belong to different call management parts; And At the SCP, the exchange performs paging and alerting to the called party through the called leg, and a ring back tone provider (IP) is predetermined to the calling party through the calling leg. Third feature to send ring back tone A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 8, A fourth function of providing the predetermined ring back tone to the calling party and in the paging and call notification to the called party, in response to a call from the called party, the exchange to notify the SCP of an incoming response; And The SCP commands the IP to suspend transmission of the predetermined ring back tone, requests a call leg to be transferred to the exchange, and moves the called leg to the calling party's call management part. 5th function to establish a call A computer-readable recording medium that records a program for further realization. The method of claim 8, Providing a predetermined ring back tone to the calling party, and during a paging and call notification to the called party, when the call is no answer from the called party for a predetermined time, the exchange informs the SCP of the non-answering call; function; And A fifth function in which the SCP requests the call to be released to the exchange to terminate the call between the called party; A computer-readable recording medium that records a program for further realization. The method of claim 8, A fourth function of providing the predetermined ring back tone to the calling party and in the paging and call notification process to the called party, when the call is terminated at the calling party before answering the called party, the exchange to inform the SCP of an abnormal call; And A fifth function in which the SCP requests the call to be released to the exchange to terminate the call between the called party; A computer-readable recording medium that records a program for further realization.