KR100782060B1 - System and device and operating method of generating virtual ring back tone for mobile communication system - Google Patents

Abstract

A virtual RBT(RingBack Tone) communication system, a generator, and an operation method thereof are provided to enable a sending gateway for connecting communication systems to confirm a designated prefix and to reversely offer a virtual RBT and a virtual ACM(Address Complete Message), if a sending terminal calls a receiving terminal, so that the sending terminal can quickly confirm the RBT. A sending terminal(10) demands call connection by inputting a serial number of a receiving terminal(50), and confirms a call processing state by a received RBT(S200). A sending MSC(Mobile Switching Center)(20) outputs an IAM(Initial Address Message) by setting a communication path, and delivers an RBT to the sending terminal(10)(S210-S250). A gateway(30) detects a prefix number by analyzing the IAM, and provides a virtual ACM and a virtual RBT to the sending MSC(20) if the detected prefix number is a designated number(S260-S340). A receiving MSC(40) pages the receiving terminal(50) by analyzing the IAM, and provides the ACM and the RBT to the gateway(30)(S350,S360). The receiving terminal(50) receives a paging signal to respond to the signal, and generates a receiving ring.

Description

Virtual ringback tone communication system and generating device and its operation method {SYSTEM AND DEVICE AND OPERATING METHOD OF GENERATING VIRTUAL RING BACK TONE FOR MOBILE COMMUNICATION SYSTEM}

1 is a functional block diagram of a general communication system,

2 is a ring back tone generation signal flow diagram of a communication system according to the prior art;

3 is a ring back tone generation signal flow diagram of a communication system according to the present invention;

          ** Explanation of symbols on the main parts of the drawing **

10: calling terminal 20: calling exchange

30: gateway 40: destination exchange station

50: called terminal

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for rapidly generating a ringback tone in a communication system, and more particularly, to a virtual ringback tone communication system and a generating device for rapidly generating a virtual ringback tone by checking a prefix number between heterogeneous communication systems, and an operation method thereof. .

In general, when a calling terminal generates a call in a communication network, a call connection request signal generated by an originating switching center is transmitted to a destination switching center through a gateway. The destination exchange station analyzes the call connection request signal, confirms that the called terminal is called, and confirms the location of the called terminal through the HLR. The called exchange station checking the location of the called terminal PAGING the called terminal, checking the PAGING response of the called terminal, and outputs the corresponding response signal and ring back tone (RBT) to the calling exchange station.

At this time, a case in which a signal is transmitted from an originating exchange to a destination exchange is called forward transmission, and vice versa.

The called exchange station checks whether the call terminal is in the busy state, the standby state, or the idle state by analyzing the PAGING response signal of the terminating terminal, and provides a ring tone corresponding to the confirmed state.

When the called terminal is busy, it provides busy tone, and when it is in standby or idle state, it provides ringback tone, and the signal provided in this manner is a ring tone.

The calling terminal checks the ring back tone, such as busy tone or ringback tone, which is returned differently according to the current operating state of the called terminal, thereby confirming whether or not it can communicate with the called terminal.

In general, when a calling terminal requests a call connection in a wired or wireless network, the called station checks the status of the called terminal (No answer, Busy, Paging No Response), and the ring tone corresponding to the state confirmed by the ITU-T standard. Occurs and returns to the calling terminal.

In case of call connection between heterogeneous systems with different operating methods, even if the operator of the calling and destination stations are different or the same operators, the response time of the ring back tone, that is, from the time when the calling terminal calls the called terminal It takes a very long time until the ring tone is output.

For example, when a call connection request is made in which a calling terminal that is subscribed to a CDMA mobile communication network that is a calling party calls a called terminal that is subscribed to a TRS (TRUNKED RADIO SYSTEM) type mobile communication network, the called exchange station receives a call. After checking PAGING response signal of terminal, ACM (ADDRESS COMPLETE MESSAGE) message and ring tone or ringback tone are transmitted to calling exchange, so it takes relatively longer from ringing terminal to ringing tone to receiving ringback tone. .

Here, the ACM message is a reverse message provided from the called exchange to the calling exchange, and notifies that all ADDRESS SIGNALs required for call connection routing are received.

In addition, the IAM message is a forward message provided from the originating switching center to the destination switching center, which starts the occupancy of the outgoing line and notifies the calling party number, the called party number, the switching center operating information, and the like related to the routing and processing of the call connection.

In general, each communication system differs in the flow of data depending on the manufacturer and operator's operation. In particular, among these communication systems, a slight error (ERROR OR DIFFERENCE) occurs in the system clock signal and the synchronization signal, which are the control signals of signal flow, and the data synchronization is delayed. There is a difference that (DELAY) occurs.

Due to the difference between the communication systems, the reply or response of the ring back tone according to the ITU-T standard can be very late between the calling exchange and the called exchange.

Heterogeneous communication system is the same or different system configuration of the signal processing method such as CDMA, CDMA-2000, CDMA-2000 1X, WCDMA, HSPDA, WIBRO, TRS, data communication network, national wired communication network, private switching network for 114 additional services Even in the case of a system, there are cases where operators differ and operation methods are different.

In addition, ACM data is not provided to the originating exchange even when a minor trouble occurs in the destination exchange. Even if the ACM message is not delivered to the calling switching center, ringback tones do not ring at the calling terminal in time, and the caller may think that the call is not connected and hang up. If the process of making and hanging a call by the caller is cumulatively unnecessary, the call connection process is repeated in the entire communication system, which wastes communication resources and increases the load.

In particular, it is necessary to provide ringback tones quickly through confirmation of each communication system, especially between heterogeneous communication systems in which system operation common signal exchange is difficult to be normally performed, and between communication systems having different signal processing methods and operation methods.

Referring to FIG. 1, a communication system according to the related art is described. A communication system composed of a calling terminal 10 and a calling switching station 20, and a communication system consisting of a called switching station 40 and a called terminal 50 are operators. Or a heterogeneous communication system having different manufacturers or operating methods and interconnected by the gateway 30.

When the calling terminal 10 generates a call connection request signal by inputting a unique number of the called terminal 50, the calling terminal 10 is recognized by the calling switching center 20.

The originating switching center 20 starts outgoing circuit occupancy and transmits to the gateway 30 an IAM (INITIAL ADDRESS MESSAGE) message containing a number related to routing and processing of a call and information for data transmission.

The gateway 30 transmits the received IAM message to the destination exchange station 40, and the destination exchange station 40 analyzes the IAM message, detects the unique number of the called terminal 50, and transmits a PAGING signal.

The PAGING response signal generated by the terminating terminal 50 is transmitted to the terminating exchange station 40. In general, the type of signal to which each terminal including the called terminal 50 responds to PAGING may be, for example, a call, a standby state, a power off state, or the like.

The destination switching center 40 provides the gateway 30 with an ACM message indicating that all ADDRESS SIGNALs required for routing of the call have been received according to the status signal returned from the destination terminal 50. It also provides a ring back tone that includes ring back tone.

The gateway 30 provides an ACM message and a ringback tone by the ring back tone to the originating switch 20 in the reverse direction, and the originating exchange 20 transmits the ring back tone by the ring back tone to the calling terminal 10.

At this time, for example, when the destination exchange station 40 provides the sound source ringback tone service and the terminating terminal 50 uses the sound source ringback tone service, the selected music signal is replaced with the destination exchange station 40 instead of the existing simple and monotonous ringback tone service. It is transmitted to the source switching center 20 through the gateway 30 and is transmitted to the calling terminal 10 by the source switching station 20.

Referring to Figure 2 describes the ring back tone generation signal flow of the communication system according to the prior art, the calling terminal 10 requests the call connection with the called terminal 50 by the calling terminal 10 (S10) The originating exchange 20 receiving the request generates an IAM message and transmits it to the gateway 30 (S20).

The gateway 30 again transmits the IAM message to the destination exchange station 40 (S30), and analyzes the IAM message by the destination exchange station 40, thus detecting and confirming the unique number of the destination terminal 50, thus confirming. The incoming terminal 50 is paged (S40).

The destination terminal 50 responds to the paging signal (S50), the paging response signal is confirmed by the destination exchange station 40, the destination exchange station 40 transmits an ACM message to the gateway 30 (S60).

In addition, the destination exchange station 40 provides the incoming ring to the called terminal 50 (S70), the receiving terminal 50 receives the incoming ring recognizes that the call was made by the user (S80). .

The destination exchange station 40 generates a ringback tone by the ring back tone and provides it to the gateway 30 (S90), and the gateway 30 transmits the ACM message and ringback tone provided from the destination exchange station 40 to the source exchange station 20. In each transmission (S100, S110), the source switching center 20 analyzes the ACM message and transmits a ringback tone to the calling terminal 10 (S120).

Through the above process, the calling terminal 10 checks whether the called terminal 50 and the call are connected and responds to the call. After that, the ANM (ANSWER MESSAGE) message transmission between the destination exchange station 40 and the source exchange station 20 and the formation of a call are common, and thus description thereof is omitted. The ANM message is an incoming reply message indicating that the call has been answered.

In the related art, after receiving the PAGING response signal of the terminating terminal 50 at the terminating exchange station 40, an ACM message and a ringback tone are generated, provided to the gateway 30, and transmitted to the originating exchange station 20 again. There is a problem such as a long time or delay to check the ringback tone in 10).

According to an example, when the calling exchange 20 receives the ACM message and the ringback tone from the called exchange 40 within 10 seconds, it is about 28%, and when the calling exchange 20 receives the reply within 5 seconds, it is about 51%. If you get a reply within 1-2 seconds, it can be confirmed within 15%.

In addition, even when 10 seconds have elapsed due to a failure of the destination switching center, ACM messages and ringback tones are frequently returned, which is one of the reasons for complaints about a call connection complaint.

In the case of a call connection occurring between terminals in a general switching center itself, a normal ringback tone is generated within about 1-2 seconds after the call.

Therefore, when the calling terminal 10 calls the called terminal 50, the ringback tone is generated very late, and the user determines that the call is not connected and repeats the process of retrying the call. There is a problem that the complaints occur due to the falling success rate, increasing the load on the communication system.

The present invention checks the designated PREFIX at the calling gateway connecting the communication system when the called terminal is called by the calling terminal, and provides the virtual ACM message and the virtual ringback tone in the reverse direction, so that the ringback tone is quickly confirmed at the calling terminal. It is an object of the present invention to provide a virtual ringback tone communication system and a generator and a method of operating the same.

In addition, since the ringback tone is generated quickly between heterogeneous communication systems, it is confirmed that the call connection processing with the called terminal proceeds smoothly in the calling terminal, and the call ring is maintained to maintain the call state, thereby increasing the call connection rate. And an operation method thereof.

In addition, it is possible to provide a virtual ringback tone communication system, a generating device, and a method of operating the same, which increase the reliability of the operation because the success rate of the call connection request is not increased and the call processing load of the communication system is reduced. That is the purpose.

The present invention has been made in order to achieve the above object, the calling terminal by inputting the unique number of the called terminal requesting the call connection and confirming the call processing state by the received ringback tone; An originating exchange station receiving a call connection request signal of an originating terminal, setting up a communication path, outputting an IAM message, and delivering a ringback tone provided from the gateway to the originating terminal; A gateway that analyzes an IAM message provided from an originating exchange to detect a PREFIX number, and if the detected PREFIX number is determined to be a designated number, provides a virtual ACM message and a virtual ringback tone to the originating exchange; A destination exchange station that analyzes the IAM message from the gateway, paging the called terminal, and provides an ACM message and ringback tone to the gateway; And a terminating terminal for receiving and responding to a paging signal of the terminating exchange station and generating a terminating ring provided; Present a configuration that includes.

In addition, the present invention has been made to achieve the above object, when the call exchange request signal from the originating terminal to the terminating terminal is input by the originating exchange station provides the IAM message to the gateway, the gateway detects and analyzes the PREFIX Checking whether the designated PREFIX is made; And providing a virtual ACM message and a virtual ringback tone to the calling exchange when the PREFIX is designated by the gateway, and forwarding the IAM message to the called exchange. This presents the included configuration.

In addition, the present invention has been made to achieve the above object, is provided by the destination exchange IAM message from the gateway, the receiving terminal to check the paging, receiving a response signal for the paging, ACM message and ring back tone Providing to the gateway; And disregarding the normal ACM message provided from the terminating exchange by the gateway, transferring the normal ringback tone to the originating exchange in exchange for the virtual ringback tone, and transmitting the ANM message of the terminating exchange to the originating exchange to establish a communication path. ; This presents the included configuration.

In addition, the present invention devised to achieve the above object, in a communication system including a calling terminal, a calling exchange station, a gateway, a called exchange station, a called terminal, by analyzing the IAM message input from the calling exchange station to determine the PREFIX number If a detected, pre-recorded and registered number is confirmed, a virtual ACM message and a virtual ringback tone are output to the calling exchange station, and the destination switching station includes a gateway device for delivering a normal IAM message.

In addition, the present invention devised to achieve the above object, in the communication system operating method comprising a calling terminal, a calling exchange station, a gateway, a called exchange station, a called terminal, inputting an IAM message from the originating exchange station by the gateway. Process of doing; Detecting a PREFIX number by a unique number of a called terminal which is called by decrypting an IAM message; Analyzing the detected PREFIX number and confirming whether the PREFIX number is previously designated and registered; And outputting a virtual ACM message and a virtual ringback tone to the calling exchange when the checked PREFIX number is a previously designated and registered number. This presents the included configuration.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a virtual ringback tone communication system, a generating device, and a method of operating the same will be described with reference to the accompanying drawings.

3 is a flowchart illustrating a ringback tone generation signal of a communication system according to the present invention. 1 is used to explain a functional block configuration of a communication system according to the present invention.

Referring to FIG. 1, according to an example, a virtual ringback tone mobile communication system according to an embodiment of the present invention includes an originating terminal 10 for inputting and calling a unique number of a called terminal and confirming a call processing state by a ringback tone 10. ); An originating exchange station 20 which sets a communication path as a call connection request of the calling terminal, outputs an IAM message including a unique number of the called terminal to the gateway, and transmits a ringback tone provided through the gateway to the calling terminal; Detect the PREFIX by analyzing the IAM message of the calling exchange, and if confirmed with the specified number, provide virtual ACM message and ringback tone to the calling exchange, forward the IAM message to the called exchange, ignore the normally provided ACM message and normal ringback tone The gateway 30 for transmitting to the calling exchange; A destination switching center 40 for receiving an IAM message from a gateway, paging a destination terminal, and providing reverse direction of the ACM message and ringback tone; A called terminal 50 which receives and responds to a paging signal of the called exchange station and generates an incoming ring signal by the incoming ring signal; It includes a configuration.

Referring to FIG. 3, the operating method of the virtual ringback tone communication system according to an embodiment of the present invention will be described. When an originating terminal requests a call connection with a terminating terminal, an originating switching station provides an IAM message to a gateway. The gateway resolves and confirms the PREFIX number. When it is confirmed that the PREFIX is designated by the gateway, the gateway provides a virtual ACM message and a virtual ringback tone to the calling exchange, sends an IAM message to the called exchange, and the ACM message normally provided from the called exchange is It ignores and transfers ringback tone to virtual ringback tone and establishes communication path.

1 and 3, the virtual ringback tone communication system and its operation method will be described in detail.

In general, a wireless communication system including a wired wire provides a communication service for delivering a message to a far-end counterpart that cannot communicate a doctor with a voice signal or an audio signal.

The caller wants to confirm what the called party is in response to the call or call connection request through the communication system, and the signal that solves this purpose is a ring tone.

Since the ring back tone is generated by the ITU-T standard and confirms or anticipates whether the other party can communicate with the ring back tone, it can be reduced so that unnecessary traffic (TRAFFIC) does not occur in the communication system due to repeated call connection requests. .

In the communication system, the counterpart terminal may be, for example, in communication with a third party, a power off state, or a standby state.

BUSY TONE which represents the other party's communication with the third party and RING BACK TONE (RBT) which indicates that the other party can communicate immediately after answering because the other party is IDLE. to be. In general, the busy signal is represented as "to-to-" and the ringback tone is represented as "follow-", which is relatively simple.

The ring back tone is generated by the called party or called party, which is the other party's exchange, and received by the calling or calling party and provided to the calling terminal. Recently, the sound ring which registers its favorite music or audio signal to the subscribed exchange and provides the other exchange or calling exchange when it is called from the other party, so that the other terminal or calling terminal transmits it instead of ringback tone to confirm it. There is a backton supplementary service.

For example, when the calling terminal is controlled by the switching center of the CDMA communication system and the receiving terminal is controlled by the switching station by the TRS communication system, transmission of the ACM message, which is data, is delayed and transmitted by different communication systems and reference signal operating systems. Since the terminal receives a ringback tone, which is a ring back tone, by a voice signal, it is determined that the call connection with the called terminal has not been performed by the user.

Since the originating terminal stops the call connection request that is in progress and repeats the redial which is called again, the originating exchange station congests the call connection traffic, increases the load and decreases the call connection success rate. Therefore, the present invention is to solve the problem that the re-call occurs due to the transmission delay of the ring back tone occurring between the heterogeneous communication system, the increase of call connection request traffic and degradation of the call connection success rate.

For example, when the CDMA calling terminal 10 accesses the calling switching center 20 and calls the TRS calling terminal 190, the CDMA calling terminal 10 may communicate in a mobile state. The calling terminal 10 provides a call connection request signal including a unique number of the called terminal 50 to the calling switching center 20. The originating switching center 20 initiates outgoing line occupancy and generates an IAM message containing a PREFIX number and a specified unique number that distinguishes the network as needed for CALL routing and its processing.

For example, in the case of the PREFIX number, the TRS communication network is 0130, the mobile communication network is 010, 011, 016, 017, 018, 019, and the wired communication network is 02,031,032,033,041,042,043 .... and the exchange guide is 114.

CALL routing information including the PREFIX number is forwarded to the gateway 30 by an IAM message.

The gateway 30 communicates with the communication system when the calling terminal 10 wants to connect with the called terminal 50 subscribed to the called switching center 40, which is another heterogeneous communication system, without calling a subscriber of the calling switching station 20. It establishes the corresponding path between the systems and simultaneously provides different protocols in the matching state.

That is, the gateway 30 decodes the IAM message provided by the source switching center 20 to detect the PREFIX number, analyzes and confirms whether to request the connection to the destination switching center 40, and provides a switching setting for the corresponding communication path.

For example, the gateway 30 may preset, register, modify, add, and change a plurality of PREFIX numbers including 0130 for designating a TRS communication network and 114 for exchange guidance.

At this time, the gateway 30 analyzes the IAM message of the originating exchange 20 and if it is confirmed that the PREFIX number designates the destination exchange 40 and includes a pre-registered number, the virtual ACM message and the virtual ringback tone. It generates itself and transmits it to the calling switching center 20.

In addition, the gateway 30 transmits the same IAM message to the destination switching center 40 confirmed by PREFIX number resolution.

When the gateway 30 analyzes the PREFIX number detected from the IAM message and confirms it as a previously designated and registered number, the gateway 30 generates a virtual ACM message and a virtual ringback tone and provides the calling exchange 20 in the reverse direction. ) Is passed the same IAM message.

The ACM message indicates that all messages required for CALL routing have been received, originated from the destination switching center 40 and transmitted to the gateway 30 and forwarded by the gateway 30 to the originating switching center 20.

The source switching center 20 transmits the virtual ringback tone provided from the gateway 30 to the calling terminal 10, so that the calling terminal 10 generates and outputs a ringback tone by an audio signal.

The gateway 30 provides the IAM message to the destination exchange station 40 and the destination exchange station 40 analyzes the IAM message, thus confirming that the destination terminal 50 is designated and called.

The destination exchange station 40 provides a paging signal to the destination terminal 50, and the destination terminal 50 receives a paging signal, and the ring back tone is displayed as a standby state by the current state or busy state during communication. Reply Reply

The destination exchange station 40 checks such a paging response signal and generates a normal ACM message and a ringback tone, which is a voice signal, and transmits it to the gateway 30 of the source communication system. to provide.

The ringback tone is generated at the destination exchange station and provided to the source exchange station according to the international standard ITU-T standard. Various sound sources including music, natural sounds, synthesized audio signals by synthesizers, musical instrument sounds, songs, and voices are used. These sound ring back tones indicate a user's personality or taste and can also check whether the designated called terminal is correctly called.

In this case, the gateway 30 generates a virtual ACM message and a virtual ringback tone and provides the originating exchange 20 with the normal ACM message provided in the delay state from the terminating exchange 40 to be discarded by data processing. do. In addition, the normal ringback tone provided in the DELAY state from the destination exchange station 40 cuts off the output of the virtual ringback tone provided to the originating exchange station by the gateway, and transfers it to the originating exchange station 20 by replacing or replacing it. .

At this time, for example, when the destination exchange station 40 provides the sound source ringback tone service and the terminating terminal 50 uses the sound source ringback tone service, the sound source ringback tone is provided to the gateway 30 by the destination exchange station 40. The sound source ringback tone replaced by the virtual ringback tone by the gateway 30 is transmitted to the source switching center 20.

In addition, when the called terminal 50 wants to communicate in response to the call, for example, an ANM message of FOOK OFF is provided to the destination switching center 40, and the ANM message is delivered to the gateway 30 and is again sent. It is delivered to the switching center 20.

That is, the originating switching center 20, the gateway 30, and the terminating switching center 40 connects the call that is the voice path of the calling terminal 10 and the called terminal 50 by the ANM message. Therefore, the mobile terminal 10 and the destination terminal 190 perform voice signal communication through the connected call.

This process will be described in detail with reference to the accompanying FIG. 3. The unique terminal number of the called terminal 50 is input by the calling terminal 10 and transmitted to the calling switching center 20 together with the call connection request signal (S200). ).

The originating switching center 20 requests outgoing line occupancy and generates an IAM message including a calling number, a called number, data information necessary between the communication system, and provides the gateway 30 to the gateway 30. (S210).

The gateway 30 analyzes the PREFIX number detected from the IAM message to check whether it is a PREFIX number of the destination exchange station 40 that is previously designated and registered, and is registered and set as an example, 0130, which is the number of the TRS communication system. If confirmed (S220), generates a virtual ACM message and a virtual ringback tone to reply or provide to the source switching center 20 (S230, S240).

Since the originating switching center 20 transmits the virtual ringback tone to the calling terminal 10, the ringing back tone is generated by the calling terminal 10 and output as a voice signal to confirm that the call connection with the called terminal 50 is progressing smoothly. (S250). In addition, the gateway 30 delivers an IAM message having the same content as that input from the originating exchange 20 to the destination exchange 40 (S260).

The destination exchange station 40 analyzes the IAM message provided from the gateway 30 to confirm that the destination terminal 50 is designated and called, and transmits a paging signal to the destination terminal 50 (S270).

The terminating terminal 50 receives the paging signal and returns a paging response signal indicating the current operation status to the terminating exchange 40 (S280). The destination exchange station 40 receives the paging response signal from the destination terminal 50 and generates a normal ACM message informing that all ADDRESS SIGNALs required for call routing are received and transmits it to the gateway 30 (S310).

In addition, the destination exchange station 40 provides a ringing signal to the called terminal 50 (S290), the receiving terminal 50 outputs a ringing signal to confirm that the call from the other party (S300). The destination exchange station 40 generates a normal ring back tone and transmits it to the gateway 30 (S320).

At this time, for example, when the terminating terminal 50 uses the sound source ringback tone service, the terminating exchange station 40 provides the designated sound source ringback tone to the gateway 30.

The gateway 30 ignores (IGNORE) or deletes or removes the ACM message, which is data normally provided from the destination switching center 40, by data processing (S330), and converts the ringback tone, which is a voice signal normally provided, into a virtual ringback tone. In place of the transfer to the source switching center 20 (S340). That is, the gateway 30 blocks the output of the virtual ringback tone and transfers it to the normal ringback tone. For example, when the ringback tone provided from the destination switching center 40 is a sound ringback tone, the virtual ringback tone of the general form is first transmitted or replaced with a normal sound source ringback tone while being transmitted to the calling terminal 10. do.

At this time, as an example of a signal to be communicated from the terminating terminal 50 that generates the terminating ring signal, when a hook-off signal is generated, the terminating exchange station 40 confirms with the terminating exchange station 40, and the terminating exchange station 40 is an ANM ( The data signal of the ANSWER MESSAGE message is generated and transmitted to the gateway 30, and the gateway 30 transmits the ANM message to the originating exchange station 20 (S360).

A call for voice communication is connected or connected between the source switching station 20, the gateway 30, and the destination switching station 40, and the calling terminal 10 and the called terminal 50 perform communication.

As such, when the calling terminal 10 calls the called terminal 50 subscribed to the heterogeneous communication system, the called terminal 40, which is a heterogeneous communication system, is set in advance by the gateway 30 of the calling communication system. Since the PREFIX number is specified and the virtual ringback tone is provided, the ringback tone is generated quickly and virtually confirming that call processing is in progress.

In addition, the PREFIX number set by the gateway 30 is checked, and occurs when the operator connects to another communication system, a local wired communication network, a private communication network for 114 additional services, or a data communication network. There is an advantage to solve the problem that the ACM message is not generated due to delay in provision or failure of the destination exchange.

Although the present invention has been described as an example as described above, the present invention is not necessarily limited to such an example, and various modifications can be made without departing from the spirit of the present invention.

Therefore, one example disclosed in the present invention is not intended to limit the technical spirit of the present invention but to explain, and the scope of the technical idea of the present invention is not limited by the example. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

The present invention having the above-described configuration improves the reliability of the communication system by quickly providing a ring back tone when the calling terminal subscribed to the called exchange station of the heterogeneous communication system in which the calling terminal subscribed to the calling exchange is operated in a different manner. There is an industrial use effect.

In addition, it quickly confirms the status of the call connection between communication systems of different operation methods by using a ring back tone so that the call is maintained until the other party answers, thus increasing the call connection rate and lowering the system load, thereby operating the communication service. There is an industrial use effect of increasing quality.

In addition, the user of the calling terminal checks the call connection progress, feels the psychological stability of the call processing, and stops the call in progress unnecessarily by repeating the call connection tone, thereby reducing the call traffic of the communication system. There is an industrial use effect to reduce the load and increase the stability of the operation.

In addition, the terminal user is recognized that the call connection between the heterogeneous communication system smoothly and quickly has a convenient effect of increasing the reliability and utilization of the communication system.

Claims (20)

A calling terminal for requesting a call connection by inputting a unique number of the called terminal and checking a call processing state by a received ringback tone; An originating exchange station that receives the call connection request signal of the originating terminal, sets up a communication path, outputs an IAM message, and transmits a ringback tone provided from the gateway to the originating terminal; A gateway for analyzing a IAM message provided from the originating exchange to detect a PREFIX number, and if the detected PREFIX number is determined to be a designated number, providing a virtual ACM message and a virtual ringback tone to the originating exchange; A destination exchange station that analyzes the IAM message from the gateway and paging the called terminal and provides an ACM message and ringback tone to the gateway; And A terminating terminal receiving and responding to a paging signal of the terminating exchange station and generating a terminating ring provided; Virtual ringback tone communication system configured to include. The method of claim 1, The originating exchange station is wirelessly connected or wired to the originating terminal, And the terminating exchange station comprises a wireless connection or a wired connection with the terminating terminal. The method of claim 1, wherein the gateway, Connect to the calling switching center to configure a calling communication system, Analyze the IAM message provided from the originating exchange station, establish a route with the destination exchange station, deliver the IAM message to the destination exchange station, And virtually processing the normal ACM message provided from the destination exchange station to ignore the data. The method of claim 1 or 3, wherein the gateway, And when the normal ringback tone is provided from the called exchange station, blocking the output of the virtual ringback tone provided to the calling exchange station, and transmitting the normal ringback tone using the voice path. The method of claim 1, wherein the destination exchange station, And a paging terminal identified by analyzing the IAM message provided from the gateway, and providing a ringback tone to the gateway. Providing an IAM message to the gateway when a call connection request signal from the calling terminal to the called terminal is input by the calling switching center, and the gateway detects and analyzes the PREFIX to check whether the designated PREFIX exists; And Providing a virtual ACM message and a virtual ringback tone to an originating exchange station when the PREFIX is designated by the gateway, and delivering the IAM message to a destination exchange station; Operation method of the virtual ringback tone communication system configured to include. The method of claim 6, wherein the checking process, Receiving, by the calling switching station, a unique number of the called terminal and a call connection request signal from the calling terminal; Generating, by the originating switching center, an IAM message to a gateway; And Receiving, by the gateway, an IAM message and detecting a PREFIX number to determine whether a designated number is present; Method of operation of a virtual ringback tone communication system comprising a. The method of claim 6, wherein the delivery process, If it is determined that the PREFIX number detected by the gateway is designated, generating a virtual ACM message and providing the same to the calling exchange; Generating a virtual ring back tone by the gateway and providing the virtual ring back tone to the calling switching center; Delivering the virtual ringback tone to a calling terminal by the calling switching center; And Delivering, by the gateway, an IAM message to a destination switching center; Method of operation of a virtual ringback tone communication system comprising a. Receiving an IAM message from the gateway by the destination exchange station, checking and paging the destination terminal, receiving a response signal for paging, and providing an ACM message and a ringback tone to the gateway; And Disregarding the normal ACM message provided from the terminating exchange by the gateway, transferring the normal ringback tone to the originating exchange in exchange for the virtual ringback tone, and transmitting the ANM message of the terminating exchange to the originating exchange to establish a communication path; ; Operation method of the virtual ringback tone communication system configured to include. The method of claim 9, wherein the providing process, Transmitting a paging signal to a called terminal confirmed by IAM message analysis by the called exchange station; The destination exchange station inputting a paging response signal returned by the called terminal; Providing, by the destination exchange station, a normal ACM message to a gateway; Providing a ringing signal to a called terminal by the called exchange station; And Providing a ringback tone to a gateway by the called exchange station; Method of operating a virtual ringback tone communication system, characterized in that it is included. The method of claim 10, ACM message and ringback tone generated by the destination exchange station, And a signal generated normally by the paging response signal of the called terminal and provided to the gateway. The method of claim 9, wherein the setting process, Ignoring normal ACM messages provided by the gateway from the destination switching center; The normal ringback tone provided from the called exchange station is blocked and replaced by the virtual ringback tone provided to the originating exchange station and transmitted to the originating exchange station; Delivering a normal ringback tone to a calling terminal by the calling switching center; And Transmitting, by the gateway, an ANM message provided from the called exchange station to the calling exchange station, and establishing a communication path between the calling terminal and the called terminal; Method of operation of a virtual ringback tone communication system comprising a. The method of claim 12, wherein the communication path, And a path through which voice communication signals between the source and destination switching stations are transmitted and received. The method of claim 12, wherein ignoring the normal ACM message, And generating a virtual ACM message by the gateway and providing it to the calling switching center, wherein the normal ACM message provided from the called switching center is removed. In a communication system comprising a calling terminal, a calling exchange station, a gateway, a called exchange station, and a called terminal, After analyzing the IAM message input from the calling exchange, the PREFIX number is detected, and if it is recorded in advance and confirmed as a registered number, the virtual ACM message and the virtual ringback tone are output to the calling switching station, and the called exchange receives the normal IAM message. Virtual ringback tone generating device is configured to include a forwarding gateway device. The method of claim 15, wherein the gateway, The normal ACM message provided from the called exchange station is removed by data processing, and the normal ringback tone is configured to block and replace the output of the virtual ringback tone provided to the calling exchange station in the reverse direction, and to deliver it to the voice path. Virtual ringback tone generator. In the communication system operating method comprising a calling terminal, a calling exchange station, a gateway, a called exchange station, a called terminal, Inputting, by the gateway, an IAM message from the originating exchange station; Detecting a PREFIX number based on a unique number of a called terminal called by decrypting the IAM message; Analyzing the detected PREFIX number and confirming whether the PREFIX number is previously designated and registered; And Outputting a virtual ACM message and a virtual ringback tone to an originating exchange if the identified PREFIX number is a previously designated and registered number; Operation method of the virtual ringback tone generator comprising a. The method of claim 17, And providing a virtual ACM message and a virtual ringback tone to an originating exchange station, and outputting a normal IAM message to the destination exchange station. The method according to claim 17 or 18, wherein the virtual ringback tone, And if the normal ringback tone is provided from the destination exchange station to the gateway, the provision of the ring back tone to the calling exchange station is blocked by the gateway and provided in exchange for the normal ring back tone. The method according to claim 19, wherein the normal ring back tone, And a registered music, a natural sound, and an audio source by a synthesizer, which is registered with the destination exchange station by the called terminal.

Images