KR20050063930A - Method and system for reporting caller's information to terminating terminal based on mobile communication network - Google Patents

Abstract

The present invention is a mobile communication network that monitors the status of the called terminal and notifies the called terminal of the calling terminal when the called terminal is in a state capable of communication when the call to the called party fails in response to the caller's call request in the mobile communication system. Of the caller's incomplete call notification method,

According to the present invention, since the SMS text message is transmitted regardless of the state of the incoming mobile terminal 112, the conventional disadvantage of disturbing the call of the called party can be solved. In addition, even when the terminating mobile terminal 112 is turned off, the user's convenience is greatly improved by storing the delivery message and notifying the terminating mobile terminal 112 when the power is turned on. In addition, since it is possible to provide a service without colliding with a number of existing additional services, it is possible to maximize the subscriber's satisfaction in connection with various related services.

Description

Method and system for reporting caller's incomplete call in mobile communication network {Method and System for Reporting Caller's Information to Terminating Terminal Based on Mobile Communication Network}

The present invention relates to a method and a system for notifying an incomplete call of a caller in a mobile communication network. More particularly, when a call fails to be sent to a called party in response to a caller's call request in a mobile communication system, a call is monitored by a state of a called terminal. The present invention relates to a method and a system for notifying an incomplete call of a caller in a mobile communication network which notifies the called terminal of caller information when the terminal becomes available for communication.

When the call fails when subscriber A calls subscriber B in the mobile communication network, subscriber A may notify the subscriber B by leaving his / her calling number by accessing a voice mailbox provided by the mobile communication service. However, this service interrupts the call of subscriber B by sending an arrival alarm of a text message or voice message even if subscriber B is busy regardless of the status of subscriber B.

1 is a configuration diagram schematically showing a configuration of a mobile communication system providing a conventional voice mailbox service.

Conventional mobile communication system 100 is a mobile terminal (110, 112), wireless base station (120, 120 '), mobile switching center (130, 130'), SMS center 140, voicemail server 150, voicemail database 152 and the like.

The mobile terminals 110 and 112 are terminals not only to perform a telephone call by wireless communication with the counterpart via a mobile communication network but also receive additional services such as voice mail service or SMS text service.

The wireless base station (120, 120 ') includes a base station transmission system (BTS) and a base station controller (BSC), the base station transmitter (BTS) is a radio for the mobile terminal (110, 112) Transmit / receive signals, convert communication protocols, encrypt / decrypt, etc. The base station controller (BSC) manages a plurality of base station transmitters, and performs functions such as allocation control of communication channels for the mobile terminals 110 and 112. .

The mobile switching center 130 processes the call request made by the base station transmitter (BTS) via the base station controller (BSC). In addition, the mobile switching center 130 switches so that the mobile terminals 110 and 112 can wirelessly access the voicemail server 150 to provide a connection path.

The location registers 132 and 134 manage information of mobile subscribers registered in the area controlled by the wireless base stations 120 and 120 '. As a database that temporarily stores the information of the mobile subscriber when entering the service area and receiving the service, the home location register (HLR) 132 and the visitor location. It is divided into a register (VLR: Visitor Location Register, hereinafter referred to as 'VLR') 134. Here, the HLR 132 is a database that stores service profiles related to subscriber information of the users of the mobile terminals 110 and 112. The HLR 132 includes a terminal identification number of the mobile terminals 110 and 112, including a subscriber's telephone call. Number: MIN, Electronic Serial Number (ESN) and service type information. The HLR 132 functions to store subscriber information including information of the wireless base stations 120 and 120 'where the mobile terminals 110 and 112 are located and the mobile switching centers 130 and 130'. Techniques for this are well known to those skilled in the art, and thus detailed descriptions thereof will be omitted.

In the conventional mobile communication system 100 configured as described above, when the outgoing mobile terminal 112 does not receive the outgoing call from the outgoing mobile terminal 110 to the outgoing mobile terminal 112, the outgoing mobile switching center ( 130 connects the calling mobile terminal 110 to the voice mail server 150 to provide a voice mail service for leaving the caller's voice in the voice mailbox assigned to the called mobile terminal 112. In addition, the outgoing mobile switching center 130 transmits an SMS text indicating that a voice message is received in the voice mailbox to the incoming mobile terminal 112 through the incoming mobile switching center 130 'by using the SMS center 140. You will be informed. On the other hand, the destination mobile terminal 112 accesses the voice mail server 150 and checks the caller's voice message received in the voice mailbox assigned to the user.

That is, in the case of the voice mail service provided as above, or the caller ID service that informs the caller's telephone number, the service is for the called party. However, the above service has an disadvantage in that it interferes with the call of the called party because the SMS text message is transmitted regardless of the state of the called mobile terminal 112. In addition, when the power of the terminating mobile terminal 112 is turned off, it is discarded after a predetermined time by the algorithm of the text message transmission system, and the notification function to the terminating mobile terminal 112 can be read. have.

The present invention for solving the above problems, when the transmission of the outgoing call to the called party for the caller's call request in the mobile communication system, by monitoring the status of the called terminal when the destination terminal is in a communication state, the caller's outgoing information An object of the present invention is to provide a method and system for notifying a caller of an incomplete call in a mobile communication network notifying a terminal.

In order to achieve the above object, the present invention provides, as a first object, an incomplete call notification system that monitors a state of a called terminal when an outgoing call transmission fails and notifies the called terminal when the called terminal is in a state capable of communication. A mobile terminal for transmitting a call to a called terminal through a mobile communication network to request a call, transmitting outgoing information on an incomplete call, or receiving and displaying the outgoing information from the mobile communication network; When the called terminal is busy or there is no response due to power off, the calling information of the mobile terminal is stored and the calling information of the mobile terminal is stored, and the communication state of the called terminal is monitored. An incomplete call notification server that notifies the called terminal of the originating information of the mobile terminal when it becomes possible; And an incomplete call database that stores outgoing information of the mobile terminal as data.

In addition, according to a second object of the present invention, when the outgoing call transmission from the originating mobile terminal to the destination mobile terminal, the incomplete call notification method for monitoring the status of the incoming mobile terminal and notifies the calling information when the communication is possible A first step of sending, by the originating mobile terminal, an outgoing call to the called mobile terminal; Requesting, by the called party's home location register, the location information of the called mobile terminal including OSFI to the calling call; A third step of requesting an incomplete call notification service when the called party's home location register searches for the location information of the called mobile terminal and is in a power-off state; A fourth step of processing an incomplete call for the originating mobile terminal; A fifth step of executing the incomplete call notification service and monitoring a communication state of the called mobile terminal to report a power-on state of the called mobile terminal from the called home location register; And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal.

According to a third object of the present invention, when an outgoing call transmission fails from an originating mobile terminal to an incoming mobile terminal, the incomplete call notification method of monitoring the state of the incoming mobile terminal and notifying outgoing information when it becomes a communicable state A first step of sending, by the originating mobile terminal, an outgoing call to the called mobile terminal; A second step of obtaining a call by querying a location path of the called mobile terminal including an OSFI with respect to the outgoing call; A third step of requesting an incomplete call notification service; A fourth step of processing an incomplete call for the originating mobile terminal; A fifth step of executing the incomplete call notification service and monitoring a communication state of the called mobile terminal to report a call release state of the called mobile terminal from a called home location register; And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal.

In addition, according to the fourth object of the present invention, when the outgoing call transmission from the originating mobile terminal to the destination mobile terminal fails, the incomplete call notification method for monitoring the status of the incoming mobile terminal and notifies the calling information when the communication is possible A first step of sending, by the originating mobile terminal, an outgoing call to the called mobile terminal; A second step of obtaining location information by querying a location path of the called mobile terminal including OSFI for the outgoing call; A third step of requesting an incomplete call notification service when another call is established between the called mobile terminal and another terminal with respect to the location information; A fourth step of processing an incomplete call for the originating mobile terminal; A fifth step of executing the incomplete call notification service and monitoring a communication state of the called mobile terminal to report a call release state of the called mobile terminal from a called home location register; And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal.

In addition, according to a fifth object of the present invention, when an outgoing call transmission fails from an originating mobile terminal to an incoming mobile terminal, the incomplete call notification method of monitoring the status of the incoming mobile terminal and notifying the calling information when the communication state becomes available A first step of sending, by the originating mobile terminal, an outgoing call to the called mobile terminal; A second step of obtaining location information by querying a location path of the called mobile terminal including OSFI for the outgoing call; A third step of requesting an incomplete call notification service when the originating call is transmitted to the called mobile terminal based on the location information and is not answered; A fourth step of processing an incomplete call for the originating mobile terminal; A fifth step of executing the incomplete call notification service and monitoring a communication state of the called mobile terminal to report a call release state of the called mobile terminal from a called home location register; And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal.

According to a sixth object of the present invention, when the outgoing call is unsuccessfully transmitted from the outgoing mobile terminal to the inbound mobile terminal, the outgoing call notification method notifies the outgoing information when the incoming mobile terminal is in a state capable of communication. Transmitting a location information request message for inquiring about the location of the called mobile terminal to a home location register for a call; A second step of receiving, with respect to the location information request message, a response message indicating that a busy or no answer including an OSFI is included; Transmitting a TTN request message to the home location register, wherein the home location register requests an incomplete call notification service to an incomplete call notification server; A fourth step of processing an incomplete call for the originating mobile terminal and performing the incomplete call notification service; Receiving a call release state of the called mobile terminal from the home location register for monitoring a communication state of the called mobile terminal; And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal.

According to a seventh object of the present invention, when the outgoing call is unsuccessfully transmitted from the outgoing mobile terminal to the inbound mobile terminal, the outgoing call notification method notifies the outgoing information when the incoming mobile terminal is in a communicable state. Transmitting a location information request message for inquiring about the location of the called mobile terminal to a home location register for a call; Receiving a response message indicating a call waiting non-response including an OSFI from the home location register; Transmitting a TTN request message to the home location register, wherein the home location register requests an incomplete call notification service to an incomplete call notification server; A fourth step of processing an incomplete call for the originating mobile terminal and performing the incomplete call notification service; A fifth step of reporting a communication waiting state of the called mobile terminal from the home location register monitoring the communication state of the called mobile terminal; And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals for the same components, even if displayed on different drawings as possible.

In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

According to the present invention, when a call is transmitted because the called terminal is busy or powered off when a call is requested by transmitting an outgoing call of the calling terminal to the called terminal, the called terminal can be monitored by monitoring the state of the called terminal. When the caller is notified of the caller's calling information to the called terminal, an embodiment of the present invention will be referred to as a "CNHP (Calling Number History Presentation) Plus" service.

Figure 2 is a schematic diagram showing the configuration of a caller incomplete call notification system according to an embodiment of the present invention.

Incomplete call notification system 200 according to the present invention is configured in the above-described mobile communication system 100 voicemail server 150 and voicemail database 152 CNHP plus server 210 and CNHP database 212 Has a replacement configuration.

The CNHP plus server 210 transmits an outgoing call of the outgoing mobile terminal 110 to the destination mobile terminal 112 so that there is no answer due to busy or power off from the incoming mobile terminal 112. In this case, the originating information of the originating mobile terminal 110 is stored in the CNHP database 212, and when the communication state of the terminating mobile terminal 112 is monitored and the communication is possible, the originating mobile terminal 112 is transferred. It performs a function of notifying outgoing information of the terminal 110.

The CNHP database 212 also stores outgoing information of the outgoing mobile terminal 110 as data.

In addition, the originating mobile terminal 110 and the terminating mobile terminal 112 may be a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a global system for mobile (GSM) phone, and wideband CDMA (W-CDMA). Phone, CDMA-2000 phone, and Mobile Broadband System (MBS) phone.

3 is a flowchart illustrating a caller's incomplete call notification method when the called terminal is in a power off state according to the first embodiment of the present invention.

In the embodiment of the present invention, for convenience of description, a case in which the user of the originating mobile terminal 110 calls the user of the incoming mobile terminal 112 will be described as an example.

When the user is located at a certain place with the originating mobile terminal 110, the originating mobile terminal 110 performs location registration for the base station that is in charge of the area where it is currently located.

In response to this, the calling mobile switching center 130 requests the location registration of the calling mobile terminal 110 to the HLR 132 (S302), and the HLR 132 executes the location registration with respect to the calling mobile terminal 110. The CNHP Plus service is set as a location registration response to transmit a response signal regnot [O_SFI = CNHP Plus] including an OSFI (Originating Service Features Indicator) to the calling mobile switching center 130 (S304). The originating mobile switching center 130 stores and manages registration information for the originating mobile terminal 110. However, the terminating mobile terminal 112 is registered in the terminating HLR 132 'in a state in which power is off and communication cannot be performed.

While the originating mobile terminal 110 has completed the location registration with respect to the base station, the originating mobile terminal 110 is set to the telephone call mode so as to be able to make a normal call or to make an incoming call.

With the outgoing mobile switching center 130 waiting for communication with the outgoing mobile terminal 110, the user of the outgoing mobile terminal 110 operates the outgoing mobile terminal 110 to make a call to the incoming mobile terminal 112. Enters the telephone number of the destination mobile terminal 112, and enters a "Send" button which is a call connection request command for a telephone call. The originating mobile terminal 110 generates call connection request data and transmits it as a radio signal.

Therefore, call connection request data is transmitted from the originating mobile terminal 110 to the originating mobile switching center 120 via the radio base station 120 as a radio signal. Here, the call connection request data includes the MIN number of the calling mobile terminal 110 and the MIN number of the called mobile terminal 112.

When the calling mobile switching center 130 receives the call connection request data transmitted from the calling mobile terminal 110, the called mobile switching center 130 'is based on the MIN number of the called mobile terminal 112 included in the call connection request data. ) Transmits a location information request message (LOCREQ (CPND1, Digits, O_SFI = CNHP Plus]) for the destination mobile terminal 112 including OSFI to the destination HLR 132 'connected to the destination HLR 132' (S306).

The called party's HLR 132 'recognizes that the CNHP Plus service field of OSFI is activated in the location information request message received from the originating mobile switching center 130, and retrieves the location information of the called mobile terminal 112. When the terminal 112 is in the power off state, the CNHP Plus service request message (SERVREQ [CPND1, Digits, SVCID = CNHP Plus, O_SFI, ADR = Inactive]) is transmitted to the CNHP plus server 210 ( S308).

The CNHP Plus server 210 sends a response message (Servreq [Result = CNHP Plus Perform]) containing the CNHP Plus service to the CNHP Plus service request message from the destination HLR 132 '. It transmits to (S310).

The called party HLR 132 ′ transmits the location information response message (locreq [ADR = Inactive]) to the originating mobile switching center 130 based on the response message received from the CNHP plus server 210, thereby sending the originating mobile switching center 130 ) Performs a procedure for processing an incomplete call with respect to the originating mobile terminal 110 (S312). That is, the calling mobile switching center 130 informs the calling mobile terminal 110 that the called mobile terminal 112 is in a state in which it is unable to make a phone call and performs an incoming call switching or voice mail service. Enter a delivery message from 110.

On the other hand, the CNHP plus server 210 drives the CNHP Plus service to monitor the communication state (Power On Registration) of the terminating mobile terminal 112 (S314). Then, the transfer message input from the originating mobile terminal 110 is stored in the CNHP database 212 together with the originating information.

On the other hand, the terminating mobile terminal 112, if the terminating user is turned on in the power off state, and performs the location registration for the base station that is currently in control of the area where it is located. Therefore, the position registration information (Power On Registration) of the terminating mobile terminal 112 is registered in the terminating side HLR 132 'via the terminating mobile switching center 130' (S316).

When the called party HLR 132 'receives the location registration information (Power On Registration) of the called mobile terminal 112 from the called mobile switching center 130', the called mobile terminal 112 is turned on from the power-off state. Recognizing that the change has been made, and transmits the status change information (SVCINFODIR [MIN, MDN, SVCID = CNHP Plus]) to the CNHP plus server 210 (S318).

When the CNHP plus server 210 receives the state change information of the terminating mobile terminal 112 from the terminating HLR 132 ', there is a delivery message from the originating mobile terminal 110 in association with the SMS center 140. It transmits the outgoing information informing to the destination mobile terminal 112 as an SMS message (S320). Of course, it can be delivered as a voice message to the destination mobile terminal 112 using the voice mailbox service.

Therefore, when the incoming mobile terminal 112 receives the outgoing information, the incoming mobile terminal 112 connects to the CNHP plus server 210 to check the forwarding message of the outgoing mobile terminal 110 in the voice mailbox of the CNHP database 212 assigned to the incoming mobile terminal 112. do.

4 is a flowchart illustrating a caller's incomplete call notification method when a called terminal is busy in accordance with a second embodiment of the present invention.

First, the originating mobile terminal 110 and the terminating mobile terminal 112 performs location registration at regular time intervals for the base station (BS) that is in charge of the area where it is currently located. In response to this, the calling mobile switching center 130 requests the caller HLR 132 to register the location of the calling mobile terminal 110, and the called mobile switching station 130 'calls the called mobile H112 132'. Request registration of the location (S402). In this case, it is assumed that the called mobile terminal 112 is in a call with another communication terminal.

The originating HLR 132 executes location registration for the originating mobile terminal 110, sets the CNHP Plus service as the location registration response, and includes a response signal including an originating service features indicator (OSFI) (regnot [O_SFI = CNHP Plus). ]) To the originating mobile switching center 130. However, the called party HLR 132 'retrieves the previous registration status for the called mobile terminal S304 and sends a response signal regnot [TermTrigger = Busy, No Answer] indicating that the call is in a location registration response and cannot be answered. It transmits to the destination mobile switching center 130 '(S404). The originating mobile switching center 130 and the terminating mobile switching center 130 'store and manage registration information for each of the mobile terminals 110 and 112. FIG.

While the originating mobile terminal 110 has completed the location registration with respect to the base station, the originating mobile terminal 110 is set to the telephone call mode so as to be able to make a normal call or to make an incoming call.

With the outgoing mobile switching center 130 waiting for communication with the outgoing mobile terminal 110, the user of the outgoing mobile terminal 110 operates the outgoing mobile terminal 110 to make a call to the incoming mobile terminal 112. Enters the telephone number of the destination mobile terminal 112, and enters a "Send" button which is a call connection request command for a telephone call. The originating mobile terminal 110 generates call connection request data and transmits it as a radio signal.

Therefore, call connection request data is transmitted from the originating mobile terminal 110 to the originating mobile switching center 120 via the radio base station 120 as a radio signal. Here, the call connection request data includes the MIN number of the calling mobile terminal 110 and the MIN number of the called mobile terminal 112.

When the calling mobile switching center 130 receives the call connection request data transmitted from the calling mobile terminal 110, the called mobile switching center 130 'is based on the MIN number of the called mobile terminal 112 included in the call connection request data. In step S406, the location information request message (LOCREQ (CPND1, Digits, O_SFI)) for the destination mobile terminal 112 including the OSFI is transmitted to the destination HLR 132 'connected to the destination HLR 132'.

The called party's HLR 132 'recognizes that the CNHP Plus service field of OSFI is activated in the location information request message received from the originating mobile switching center 130, and the called party's mobile terminal 112 obtains the status information of the called mobile terminal 112. Sends a connection path request message (ROUTREQ [O_SFI]) to the switching center 130 'and sends a response message (routreq [ADR = Busy) indicating that the terminating mobile terminal 112 is busy from the terminating mobile switching center 130'. ]) (S408). At this time, the destination mobile switching center (130 ') is a case in which the incoming mobile terminal 112 is call waiting (CW) inactive and busy (CW), Nate call waiting (NCW) inactive and In the case of data busy, a response message is transmitted by including an access denied reason (ADR) (= Busy) in a routing request return result.

The called party HLR 132 'confirming that the called mobile terminal 112 is busy sends a CNHP Plus service request message (SERVREQ [CPND1, Digits, SVCID = CNHP Plus, O_SFI, ADR = Inactive]) to the CNHP plus server 210. Transmit to (S410).

The CNHP Plus server 210 sends a response message (Servreq [Result = CNHP Plus Perform]) containing the CNHP Plus service to the CNHP Plus service request message from the destination HLR 132 '. It transmits to (S412).

The called party HLR 132 ′ transmits the location information response message (locreq [ADR = Inactive]) to the originating mobile switching center 130 based on the response message received from the CNHP plus server 210, thereby sending the originating mobile switching center 130 ) Performs a procedure for processing an incomplete call for the calling mobile terminal (110) (S414). That is, the outgoing mobile switching center 130 informs the outgoing mobile terminal 110 that the incoming mobile terminal 112 is busy and performs an incoming call transfer or voice mail service, thereby transmitting a message from the outgoing mobile terminal 110. To be inputted.

In contrast, the CNHP Plus server 210 runs the CNHP Plus service, and the destination HLR 132 ′ reports a change in the communication state of the destination mobile terminal 112 so that the current trace type (Trace Type) is busy ( Bus (Active Trace Mode) message (ATM [TraceType = Busy]) containing the information that is set to the transmission to the destination mobile switching center (130 ') (S416).

The destination mobile switching center 130 'transmits an ATM response message (atm [TraceingResult = Acceptable]) to the destination HLR 132' while monitoring the communication status of the destination mobile terminal 112 (S420). At this time, when the communication state of the terminating mobile terminal 112 is not busy, the terminating mobile switching center 130 'processes the return result as "Tracing Result = Not Applicable, Trace Facilities Denied = Busy Applicable".

The CNHP plus server 210 processes the incomplete call to the calling mobile terminal 110 and stores the forwarded message input from the calling mobile terminal 110 together with the calling information in the CNHP database 212.

On the other hand, when the incoming mobile terminal 112 is in a call release state by the end of the call of the called party in the state of being in communication with another communication terminal, the called mobile switching center 130 'recognizes the release of the call of the called mobile terminal 112. And, it transmits a Report Trace Subscriber Activity (RTSA) message indicating the call release to the called party's HLR (130 ') (S422).

When the called party HLR 132 'receives the communication status information (RTSA) of the called mobile terminal 112 from the called mobile switching center 130', it transmits a Deactivate Trace Mode (DTM) message to the called mobile switching center 130 '. Thus, the state change report to the terminating mobile terminal 112 of the terminating mobile switching center 130 'is released. On the other hand, the destination mobile switching center 130 'releases the state change report to the destination mobile terminal 112, and transmits a response signal dtm [TraceType = Busy] to the destination HLR 132' (S424). ).

In addition, the called party HLR 132 ′ recognizes that the called mobile terminal 112 has changed from the busy state to the idle state, and transmits the state change information (SVCINFODIR [MIN, MDN, SVCID) to the CNHP plus server 210. = CNHP Plus]) (S426).

When the CNHP plus server 210 receives the state change information (Busy-> Idle) for the called mobile terminal 112 from the called-side HLR 132 ', the CNHP plus server 210 interworks with the SMS center 140 to send the calling mobile terminal 110. The outgoing information informing that there is a delivery message from the destination is transmitted to the destination mobile terminal 112 as an SMS message (S428). In addition, the voice mail service can be delivered to the destination mobile terminal 112 using a voice mailbox service.

Therefore, when the incoming mobile terminal 112 receives the outgoing information, the incoming mobile terminal 112 connects to the CNHP plus server 210 and checks the forwarding message of the outgoing mobile terminal 110 in the voice mailbox of the CNHP database 212 assigned thereto. do.

FIG. 5 is a flowchart illustrating a caller's incomplete call notification method when a called terminal is busy and a call collision occurs due to a third embodiment of the present invention.

First, the originating mobile terminal 110 and the terminating mobile terminal 112 performs location registration at regular time intervals for the base station (BS) that is in charge of the area where it is currently located. In response to this, the calling mobile switching center 130 requests the caller HLR 132 to register the location of the calling mobile terminal 110, and the called mobile switching station 130 'calls the called mobile H112 132'. Request registration of the location (S502).

The originating HLR 132 executes location registration for the originating mobile terminal 110, sets the CNHP Plus service as the location registration response, and includes a response signal including an originating service features indicator (OSFI) (regnot [O_SFI = CNHP Plus). ]) To the originating mobile switching center 130.

In contrast, the called party HLR 132 'retrieves the previous registration status for the called mobile terminal S304 and transmits a response signal regnot [TermTrigger = Busy, No Answer] to the called mobile switching center 130' ( S504). The originating mobile switching center 130 and the terminating mobile switching center 130 'store and manage registration information for each of the mobile terminals 110 and 112. FIG.

With the originating mobile terminal 110 completing the location registration with the base station, and the originating mobile switching center 130 is waiting for communication with the originating mobile terminal 110, the user of the originating mobile terminal 110 is the called mobile terminal. In order to make a call to 112, the mobile terminal 110 is operated to input the telephone number of the incoming mobile terminal 112, and a "Send" button which is a call connection request command for a telephone call is input. The originating mobile terminal 110 generates an outgoing call and transmits it as a wireless signal.

Therefore, the outgoing call sent from the originating mobile terminal 110 is transmitted to the originating mobile switching center 120 via the radio base station 120 as a radio signal. Here, the outgoing call includes the MIN number of the calling mobile terminal 110 and the MIN number of the called mobile terminal 112.

When the outgoing mobile switching center 130 receives an outgoing call transmitted from the outgoing mobile terminal 110, the incoming mobile station 130 'is connected to the incoming mobile switching center 130' based on the MIN number of the incoming mobile terminal 112 included in the outgoing call. The location information request message (LOCREQ (CPND1, Digits, O_SFI)) for the destination mobile terminal 112 including the OSFI is transmitted to the side HLR 132 '(S506).

The called party HLR 132 'sends a connection path request message (ROUTREQ) to the called mobile switching center 130' in order to obtain the status information of the called mobile terminal 112 with respect to the location information request message received from the calling mobile switching center 130. [O_SFI]), and when the terminating mobile terminal 112 is in an idle state, the terminating mobile switching station 130 'results in a route request reply with location information (TLDN: Temporary Local Destrict Number) indicating the waiting state. In response to the routing request return result, a response message (routreq [TLDN]) is transmitted to the called party's HLR 132 '(S508).

The called party HLR 132 ′ transmits a response message (routreq [TLDN]) to the access path request message ROUTREQ to the calling mobile switching center 130 (S510).

On the other hand, there is a call request from the other terminal under the jurisdiction of the outgoing mobile switching center 130 to the terminating mobile terminal 112, so that the incoming mobile switching station 130 'processes the call request and establishes a call between the other terminal and the terminating mobile terminal 112. If so, a call path is established between the originating mobile switching center 130 and the terminating mobile switching center 130 ', and the terminating mobile terminal 112 is in a busy state (S512).

The destination mobile switching center 130 'requests a TTN request message (TTNREQ [CPND1, MIN, O_SFI) requesting a Transfer To Number (TTN) under the condition that "Term Trigger = Busy" when the destination mobile terminal 112 is busy. , REDReason = Busy]) is transmitted to the called party's HLR 132 '(S514). In this case, the TTN request message (TTNREQ) includes a "RED (Redirection) Reason = Busy" indicating that the call is busy with the calling number (MIN) when the voice or data is "Busy", and also the access route request message (ROUTREQ). Contains OSFI received from.

Accordingly, when the called party HLR 132 'confirms that the CNHP Plus service field of OSFI is activated and the called mobile terminal 112 is busy, the CNHP Plus service request message (SERVREQ [CPND1, Digits, SVCID = CNHP Plus) is determined. , O_SFI, ADR = Inactive]) is transmitted to the CNHP plus server 210 (S516).

The CNHP Plus server 210 sends a response message (Servreq [Result = CNHP Plus Perform]) containing the CNHP Plus service to the CNHP Plus service request message from the destination HLR 132 '. To transmit (S518).

The called party HLR 132 'sends a TTN response message (ttnreq [ADR = Unavailable]) to the TTN request message (TTNREQ) based on the response message (servreq) received from the CNHP plus server 210. Transmit (S520). At this time, the outgoing mobile switching center 130, which has a call path set up with the incoming mobile switching center 130 ', performs a procedure of processing an incomplete call for the calling mobile terminal 110. That is, the outgoing mobile switching center 130 informs the outgoing mobile terminal 110 that the incoming mobile terminal 112 is busy and performs an incoming call transfer or voice mail service, thereby transmitting a message from the outgoing mobile terminal 110. To be inputted.

On the other hand, the CNHP plus server 210 drives the CNHP Plus service (S522), and the called-side HLR 132 'reports the change in the communication state of the called mobile terminal 112, so that the current trace state (Trace Type) is called. An Activate Trace Mode (ATM) message (ATM [TraceType = Busy]) including a message set to Busy is transmitted to the destination mobile switching center 130 '(S524).

The destination mobile switching center 130 'transmits an ATM response message (atm [TraceingResult = Acceptable]) to the destination HLR 132' while monitoring the communication status of the destination mobile terminal 112 (S526).

The CNHP plus server 210 processes the incomplete call to the calling mobile terminal 110 and stores the forwarded message input from the calling mobile terminal 110 together with the calling information in the CNHP database 212.

On the other hand, when the incoming mobile terminal 112 is in a call with another terminal and the call is released due to the termination of the call, the called mobile switching center 130 'detects the release of the called mobile terminal 112 and In step S528, the RTSA (Report Trace Subscriber Activity) message indicating the call release is transmitted to the called party's HLR (130 ').

When the called party HLR 132 'receives the communication status information (RTSA) of the called mobile terminal 112 from the called mobile switching center 130', it transmits a Deactivate Trace Mode (DTM) message to the called mobile switching center 130 '. Thus, the state change report to the terminating mobile terminal 112 of the terminating mobile switching center 130 'is released. On the other hand, the destination mobile switching center 130 'releases the state change report to the destination mobile terminal 112 and transmits a response signal (dtm [TraceType = Busy]) to the destination HLR 132' (S530). ).

In addition, the called party HLR 132 ′ recognizes that the called mobile terminal 112 has changed from the busy state to the idle state, and transmits the state change information (SVCINFODIR [MIN, MDN, SVCID) to the CNHP plus server 210. = CNHP Plus]) (S532).

When the CNHP plus server 210 receives the state change information (Busy-> Idle) for the called mobile terminal 112 from the called-side HLR 132 ', the CNHP plus server 210 interworks with the SMS center 140 to send the calling mobile terminal 110. The outgoing information indicating that there is a delivery message from the destination is transmitted to the destination mobile terminal 112 as an SMS message or a voice message to the destination mobile terminal 112 using a voice mail service (S534).

Therefore, when the incoming mobile terminal 112 receives the outgoing information, the incoming mobile terminal 112 connects to the CNHP plus server 210 and checks the forwarding message of the outgoing mobile terminal 110 in the voice mailbox of the CNHP database 212 assigned thereto. do.

6 is a flowchart illustrating a method of notifying an incomplete call of a caller when the called terminal is unanswered to an originating call in a call waiting state according to a fourth embodiment of the present invention.

First, the outgoing mobile switching center 130 requests the originating mobile terminal 110 to register the location of the calling mobile terminal 110 to the calling party HLR 132, and the destination mobile terminal 130 'to the destination mobile terminal 112 to the destination HLR 132'. Request registration of the location (S602).

The originating HLR 132 executes location registration for the originating mobile terminal 110, sets the CNHP Plus service as the location registration response, and includes a response signal including an originating service features indicator (OSFI) (regnot [O_SFI = CNHP Plus). ]) To the originating mobile switching center 130.

In contrast, the called party HLR 132 'retrieves the previous registration state for the called mobile terminal 112 and transmits a response signal regnot [TermTrigger = Busy, No Answer] to the called mobile switching center 130' ( S604). The originating mobile switching center 130 and the terminating mobile switching center 130 'store and manage registration information for each of the mobile terminals 110 and 112. FIG.

With the originating mobile terminal 110 completing the location registration with the base station, and the originating mobile switching center 130 is waiting for communication with the originating mobile terminal 110, the user of the originating mobile terminal 110 is the called mobile terminal. In order to make a call to 112, the mobile terminal 110 is operated to input the telephone number of the incoming mobile terminal 112, and a "Send" button which is a call connection request command for a telephone call is input. The originating mobile terminal 110 generates an outgoing call and transmits it as a wireless signal.

Therefore, the outgoing call sent from the originating mobile terminal 110 is transmitted to the originating mobile switching center 120 via the radio base station 120 as a radio signal. Here, the outgoing call includes the MIN number of the calling mobile terminal 110 and the MIN number of the called mobile terminal 112.

When the outgoing mobile switching center 130 receives an outgoing call transmitted from the outgoing mobile terminal 110, the incoming mobile station 130 'is connected to the incoming mobile switching center 130' based on the MIN number of the incoming mobile terminal 112 included in the outgoing call. The location information request message (LOCREQ (CPND1, Digits, O_SFI)) for the destination mobile terminal 112 including the OSFI is transmitted to the side HLR 132 '(S606).

The called party HLR 132 'sends a connection path request message (ROUTREQ) to the called mobile switching center 130' in order to obtain the status information of the called mobile terminal 112 with respect to the location information request message received from the calling mobile switching center 130. [O_SFI]), and when the terminating mobile terminal 112 is in an idle state, the terminating mobile switching station 130 'results in a route request reply with location information (TLDN: Temporary Local Destrict Number) indicating the waiting state. In response to the routing request return result, a response message (routreq [TLDN]) is transmitted to the called party's HLR 132 '(S608).

The called party HLR 132 ′ transmits a response message (routreq [TLDN]) to the access path request message ROUTREQ to the calling mobile switching center 130 (S610).

On the other hand, if Call Waiting (CW) or Nate Call Waiting (NCW) is activated in the destination mobile terminal 112, the destination mobile switching station 130 'establishes a call path with the calling mobile switching station 130, In step 112, "Waiting Tone" is transmitted via the wireless base station 120 ', but the destination mobile terminal 112 does not respond to the reason for not receiving a call (S612).

The destination mobile switching center 130 'requests a TTN request message (TTNREQ [CPND1, MIN) requesting TTN (Transfer To Number) under the condition that "Term Trigger = Busy" when the destination mobile terminal 112 is No Answer. , O_SFI, REDReason = CW No Answer]) is transmitted to the called party's HLR 132 '(S614). In this case, the TTN request message (TTNREQ) includes a "RED (Redirection) Reason = Busy" indicating that the call is busy with the calling number (MIN) when the voice or data is "Busy", and also the access route request message (ROUTREQ). Contains OSFI received from.

Accordingly, when the called party HLR 132 'confirms that the CNHP Plus service field of OSFI is activated and the called mobile terminal 112 is the call waiting answer (CW No Answer), the CNHP Plus service request message (SERVREQ [CPND1, Digits, SVCID = CNHP Plus, O_SFI, ADR = CW NA]) are transmitted to the CNHP plus server 210 (S616).

The CNHP Plus server 210 sends a response message (servreq [Result = CNHP Plus Perform]) containing the CNHP Plus service to the CNHP Plus service request message from the called party HLR 132 '. It transmits to (S618).

The called party HLR 132 'sends a TTN response message (ttnreq [ADR = Unavailable]) to the TTN request message (TTNREQ) based on the response message (servreq) received from the CNHP plus server 210. Transmit (S620). At this time, the outgoing mobile switching center 130, which has a call path set up with the incoming mobile switching center 130 ', performs a procedure of processing an incomplete call for the calling mobile terminal 110. That is, the outgoing mobile switching center 130 informs the outgoing mobile terminal 110 that the incoming mobile terminal 112 is busy and performs an incoming call transfer or voice mail service, thereby transmitting a message from the outgoing mobile terminal 110. To be inputted.

Meanwhile, the CNHP Plus server 210 drives the CNHP Plus service (S622), and the called-side HLR 132 'reports the change in the communication state of the called mobile terminal 112, so that the current trace state (Trace Type) is called. An Activate Trace Mode (ATM) message (ATM [TraceType = Busy]) including a message set to Busy is transmitted to the destination mobile switching center 130 '(S624).

The destination mobile switching center 130 'transmits an ATM response message (atm [TraceingResult = Acceptable]) to the destination HLR 132' while monitoring the communication status of the destination mobile terminal 112 (S626).

The CNHP plus server 210 processes the incomplete call to the calling mobile terminal 110 and stores the forwarded message input from the calling mobile terminal 110 together with the calling information in the CNHP database 212.

On the other hand, since the terminating mobile terminal 112 is in a Call Release state, the terminating mobile switching center 130 'detects a call release of the terminating mobile terminal 112 and reports a call release. ) Transmits the message to the called party's HLR (130 ') (S628).

When the called party HLR 132 'receives the communication status information (RTSA) of the called mobile terminal 112 from the called mobile switching center 130', it transmits a Deactivate Trace Mode (DTM) message to the called mobile switching center 130 '. Thus, the state change report to the terminating mobile terminal 112 of the terminating mobile switching center 130 'is released. On the other hand, the destination mobile switching center 130 'releases the state change report to the destination mobile terminal 112 and transmits a response signal (dtm [TraceType = Busy]) to the destination HLR 132' (S630). ).

In addition, the called party HLR 132 ′ recognizes that the called mobile terminal 112 has changed from the busy state to the idle state, and transmits the state change information (SVCINFODIR [MIN, MDN, SVCID) to the CNHP plus server 210. = CNHP Plus]) (S632).

When the CNHP plus server 210 receives the state change information (Busy-> Idle) for the called mobile terminal 112 from the called-side HLR 132 ', the CNHP plus server 210 interworks with the SMS center 140 to send the calling mobile terminal 110. The outgoing information informing that there is a delivery message from the destination is transmitted to the destination mobile terminal 112 as an SMS message, or the voice message service is delivered to the destination mobile terminal 112 as a voice message (S634).

Therefore, when the incoming mobile terminal 112 receives the outgoing information, the incoming mobile terminal 112 connects to the CNHP plus server 210 and checks the forwarding message of the outgoing mobile terminal 110 in the voice mailbox of the CNHP database 212 assigned thereto. do.

7 is a flowchart illustrating a caller's incomplete call notification method when a call waiting state of a called terminal is in an inactive state under the jurisdiction of the same base station according to the fifth embodiment of the present invention.

First, in the fifth embodiment of the present invention, since the base station for the location area of the originating mobile terminal 110 and the terminating mobile terminal 112 is the same, the originating mobile switching center 130 and the terminating mobile switching center 130 ' The same case (Local Termination) will be described as an example.

The originating mobile switching center 130 requests the originating HLR 132 to register the location of the originating mobile terminal 110, and the terminating mobile switching center 130 'is also called the destination HLR 132'. Request for location registration (S702).

The originating HLR 132 executes location registration for the originating mobile terminal 110, sets the CNHP Plus service as the location registration response, and includes a response signal including an originating service features indicator (OSFI) (regnot [O_SFI = CNHP Plus). ]) To the originating mobile switching center 130. In contrast, the destination HLR 132 'also retrieves the previous registration state for the destination mobile terminal 112 and transmits a response signal regnot [TermTrigger = Busy, No Answer] to the destination mobile switching center 130' ( S704). At this time, the term trigger is set to Busy and No Answer. The originating mobile switching center 130 and the terminating mobile switching center 130 'store and manage the registration information for each of the mobile terminals 110 and 112, respectively.

With the originating mobile terminal 110 completing the location registration with the base station and the originating mobile switching center 130 waiting for communication with the originating mobile terminal 110, the user of the originating mobile terminal 110 is the called mobile terminal. In order to make a call to 112, the mobile terminal 110 is operated to input the telephone number of the incoming mobile terminal 112, and a "Send" button which is a call connection request command for a telephone call is input. The originating mobile terminal 110 generates an outgoing call including its MIN number and the MIN number of the called mobile terminal 112 and transmits it as a wireless signal. Therefore, the outgoing call sent from the originating mobile terminal 110 is transmitted to the originating mobile switching center 120 via the radio base station 120 as a radio signal.

The originating mobile switching center 130 sends a location information request message (LOCREQ) to the called mobile terminal 112 including the OSFI to the called-side HLR 132 'based on the MIN number of the called mobile terminal 112 included in the calling call. (CPND1, Digits, O_SFI) is transmitted (S706).

The called party HLR 132 'retrieves the status information of the destination mobile terminal 112 with respect to the location information request message, and sends a response message (routreq [LocalTerm] to the originating mobile switching station 130 to the location information request message ROUTREQ. ]) Is transmitted (S710).

When the outgoing mobile switching center 130 receives the response message (routreq), the TTN request message (TTNREQ [CPND1, MIN, O_SFI) requesting a transfer to number (TTN) under the condition that the tum trigger is busy (Term Trigger = Busy) , REDReason = Busy]) is transmitted to the called party's HLR 132 '(S710). In this case, the TTN request message (TTNREQ) includes "RED (Redirection) Reason = Busy" indicating that the call is busy with the calling number (MIN), and also includes the OSFI received in the location information request message (LOCREQ).

Accordingly, when the called party HLR 132 'confirms that the CNHP Plus service field of OSFI is activated and the called mobile terminal 112 is busy, the CNHP Plus service request message (SERVREQ [CPND1, Digits, SVCID = CNHP Plus) is determined. , O_SFI, REDReason = Busy]) is transmitted to the CNHP plus server 210 (S712).

The CNHP Plus server 210 sends a response message (servreq [Result = Perform]) containing CNHP Plus service execution to the destination HLR 132 'for the CNHP Plus service request message from the destination HLR 132'. (S714).

The called party's HLR 132 'sends a TTN response message (ttnreq [ADR = Unavailable]) to the TTN request message (TTNREQ) based on the response message received from the CNHP plus server 210. (S716). Subsequently, the outgoing mobile switching center 130 performs a procedure for processing an incomplete call for the outgoing mobile terminal 110. That is, the outgoing mobile switching center 130 informs the outgoing mobile terminal 110 that the incoming mobile terminal 112 is busy and performs an incoming call transfer or voice mail service, thereby transmitting a message from the outgoing mobile terminal 110. To be inputted.

On the other hand, the CNHP plus server 210 drives the CNHP Plus service (S718), and the destination HLR 132 'calls the current trace state (Trace Type) to report the change in communication status of the destination mobile terminal 112. An Active Trace Mode (ATM) message (ATM [TraceType = Busy]) including a message indicating that it is set to Busy is transmitted to the calling mobile switching center 130 (S720).

The originating mobile switching center 130 transmits an ATM response message (atm [TraceingResult = Acceptable]) to the destination HLR 132 'while monitoring the communication state of the destination mobile terminal 112 (S722).

The CNHP plus server 210 processes the incomplete call to the calling mobile terminal 110 and stores the forwarded message input from the calling mobile terminal 110 together with the calling information in the CNHP database 212.

On the other hand, the originating mobile switching center 130, which recognizes a call release state of the called mobile terminal 112 at the end of the call of the called user, reports an RTSA (Report Trace Subscriber Activity) informing the call release of the called mobile terminal 112. ) Transmits the message to the called party's HLR (130 ') (S724).

When the called party's HLR 132 'receives the communication status information (RTSA) of the called mobile terminal 112 from the calling mobile switching center 130, by sending a Deactivate Trace Mode (DTM) message to the calling mobile switching center 130, The state change report to the incoming mobile terminal 112 is released. On the other hand, the originating mobile switching center 130 releases the state change report to the called mobile terminal 112 and transmits a response signal (dtm [TraceType = Busy]) to the called party's HLR 132 '(S726). .

In addition, the called party HLR 132 ′ recognizes that the called mobile terminal 112 has changed from the busy state to the idle state, and transmits the state change information (SVCINFODIR [MIN, MDN, SVCID) to the CNHP plus server 210. = CNHP Plus]) (S728).

When the CNHP plus server 210 receives the state change information (Busy-> Idle) for the called mobile terminal 112 from the called-side HLR 132 ', the CNHP plus server 210 interworks with the SMS center 140 to send the calling mobile terminal 110. The outgoing information indicating that there is a delivery message from the destination is transmitted to the destination mobile terminal 112 as an SMS message, or a voice message service is delivered to the destination mobile terminal 112 as a voice message (S730).

Therefore, when the incoming mobile terminal 112 receives the outgoing information, the incoming mobile terminal 112 connects to the CNHP plus server 210 and checks the forwarding message of the outgoing mobile terminal 110 in the voice mailbox of the CNHP database 212 assigned thereto. do.

8 is a flowchart illustrating a caller's incomplete call notification method when a call waiting state of a called terminal is active under the jurisdiction of the same base station according to the sixth embodiment of the present invention.

The sixth embodiment of the present invention also has the same wireless base station that governs the location area of the originating mobile terminal 110 and the terminating mobile terminal 112, whereby the originating mobile switching center 130 and the terminating mobile switching center 130 'are identical. Local Termination will be described as an example.

The originating mobile switching center 130 requests the originating HLR 132 to register the location of the originating mobile terminal 110, and the terminating mobile switching center 130 'is also called the destination HLR 132'. Request a location registration (S802).

The originating HLR 132 executes location registration for the originating mobile terminal 110, sets the CNHP Plus service as the location registration response, and includes a response signal including an originating service features indicator (OSFI) (regnot [O_SFI = CNHP Plus). ]) To the originating mobile switching center 130. In contrast, the destination HLR 132 'also retrieves the previous registration state for the destination mobile terminal 112 and transmits a response signal regnot [TermTrigger = Busy, No Answer] to the destination mobile switching center 130' ( S804). At this time, the term trigger is set to Busy and No Answer. The originating mobile switching center 130 and the terminating mobile switching center 130 'store and manage the registration information for each of the mobile terminals 110 and 112, respectively.

With the originating mobile terminal 110 completing the location registration with the base station and the originating mobile switching center 130 waiting for communication with the originating mobile terminal 110, the user of the originating mobile terminal 110 is the called mobile terminal. In order to make a call to 112, the mobile terminal 110 is operated to input the telephone number of the incoming mobile terminal 112, and a "Send" button which is a call connection request command for a telephone call is input. The originating mobile terminal 110 generates an outgoing call including its MIN number and the MIN number of the called mobile terminal 112 and transmits it as a wireless signal. Therefore, the outgoing call sent from the originating mobile terminal 110 is transmitted to the originating mobile switching center 120 via the radio base station 120 as a radio signal.

The originating mobile switching center 130 sends a location information request message (LOCREQ) to the called mobile terminal 112 including the OSFI to the called-side HLR 132 'based on the MIN number of the called mobile terminal 112 included in the calling call. (CPND1, Digits, O_SFI]) is transmitted (S806).

The called party HLR 132 'retrieves the status information of the destination mobile terminal 112 with respect to the location information request message, and sends a response message (routreq [LocalTerm] to the originating mobile switching station 130 to the location information request message ROUTREQ. ]) Is transmitted (S808).

On the other hand, the outgoing mobile switching center 130 transmits an incoming signal (Waiting Tone) for the outgoing call to the incoming mobile terminal 112 via the wireless base station 120 ', and the incoming mobile terminal 112 is the called user. Does not answer the outgoing call and the outgoing time of the incoming signal elapses (Time Out For CW / NCW).

When the outgoing mobile switching center 130 receives a response message (routreq) from the called party's HLR 132 ′, the TTN requesting a TTN (Transfer To Number) under the condition of Term Trigger = No Answer. A request message (TTNREQ [CPND1, MIN, O_SFI, REDReason = CW NA]) is transmitted to the called party's HLR 132 '(S810). In this case, the TTN request message (TTNREQ) includes "RED (Redirection) Reason = Busy" indicating that the call is busy with the calling number (MIN), and also includes the OSFI received in the location information request message (LOCREQ).

Accordingly, when the called party HLR 132 'confirms that the CNHP Plus service field of OSFI is activated and the called mobile terminal 112 is no response, the CNHP Plus service request message (SERVREQ [CPND1, Digits, SVCID = CNHP Plus, O_SFI, REDReason = CW NA]) is transmitted to the CNHP plus server 210 (S812).

The CNHP Plus server 210 sends a response message (servreq [Result = Perform]) containing CNHP Plus service execution to the destination HLR 132 'for the CNHP Plus service request message from the destination HLR 132'. (S814).

The called party's HLR 132 'sends a TTN response message (ttnreq [ADR = Unavailable]) to the TTN request message (TTNREQ) based on the response message received from the CNHP plus server 210. In step S816). Subsequently, the outgoing mobile switching center 130 performs a procedure for processing an incomplete call for the outgoing mobile terminal 110. That is, the outgoing mobile switching center 130 informs the outgoing mobile terminal 110 that the incoming mobile terminal 112 is busy and performs an incoming call transfer or voice mail service, thereby transmitting a message from the outgoing mobile terminal 110. To be inputted.

On the other hand, the CNHP plus server 210 drives the CNHP Plus service (S818), and the called-side HLR 132 'has a trace state (Trace Type) of the called mobile terminal 112 being no answer (no answer) or busy ( And an Activate Trace Mode (ATM) message (ATM [TraceType = Busy]) to report changes in the communication state of the terminating mobile terminal 112. (S820).

The originating mobile switching center 130 transmits an ATM response message (atm [TraceingResult = Acceptable]) to the destination HLR 132 'while monitoring the communication status of the destination mobile terminal 112 (S822).

The CNHP plus server 210 processes the incomplete call to the calling mobile terminal 110 and stores the forwarded message input from the calling mobile terminal 110 together with the calling information in the CNHP database 212.

On the other hand, the originating mobile switching center 130, which recognizes a call release state of the called mobile terminal 112 at the end of the call of the called user, reports an RTSA (Report Trace Subscriber Activity) informing the call release of the called mobile terminal 112. ) Transmits the message to the called party's HLR (130 ') (S824).

When the called party's HLR 132 'receives the communication status information (RTSA) of the called mobile terminal 112 from the calling mobile switching center 130, by sending a Deactivate Trace Mode (DTM) message to the calling mobile switching center 130, The state change report to the incoming mobile terminal 112 is released. In response to this, the originating mobile switching center 130 releases the state change report to the called mobile terminal 112 and transmits a response signal (dtm [TraceType = Busy]) to the called-side HLR 132 '(S826). .

In addition, the called party HLR 132 ′ recognizes that the called mobile terminal 112 has changed from the busy state to the idle state, and transmits the state change information (SVCINFODIR [MIN, MDN, SVCID) to the CNHP plus server 210. = CNHP Plus]) (S828).

When the CNHP plus server 210 receives the state change information (Busy-> Idle) for the called mobile terminal 112 from the called-side HLR 132 ', the CNHP plus server 210 interworks with the SMS center 140 to send the calling mobile terminal 110. The outgoing information indicating that there is a delivery message is transmitted to the destination mobile terminal 112 as an SMS message, or the voice message service is delivered to the destination mobile terminal 112 as a voice message (S830).

Therefore, when the incoming mobile terminal 112 receives the outgoing information, the incoming mobile terminal 112 connects to the CNHP plus server 210 and checks the forwarding message of the outgoing mobile terminal 110 in the voice mailbox of the CNHP database 212 assigned thereto. do.

According to the embodiments of the present invention described above, when the transmission of the outgoing call to the called party fails in response to the caller's call request in the mobile communication system, by monitoring the status of the called terminal to the caller's calling information when the called terminal can communicate A method and system for notifying an incomplete call of a caller can be realized in a mobile communication network which notifies the called terminal.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, since the SMS text message is transmitted regardless of the state of the destination mobile terminal 112, the conventional disadvantage of disturbing the caller can be solved.

In addition, even when the terminating mobile terminal 112 is turned off, the user's convenience is greatly improved by storing the delivery message and notifying the terminating mobile terminal 112 when the power is turned on.

In addition, since it is possible to provide a service without colliding with a number of existing additional services, it is possible to maximize the subscriber's satisfaction in connection with various related services.

1 is a configuration diagram schematically showing the configuration of a mobile communication system providing a conventional voice mailbox service;

2 is a block diagram schematically showing the configuration of a caller incomplete call notification system according to an embodiment of the present invention,

3 is a flowchart illustrating a caller's incomplete call notification method when a called terminal is powered off according to a first embodiment of the present invention;

4 is a flowchart illustrating a caller's incomplete call notification method when a called terminal is busy in accordance with a second embodiment of the present invention;

5 is a flowchart illustrating a caller's incomplete call notification method when a called terminal is busy and a call collision occurs due to a third embodiment of the present invention;

6 is a flowchart illustrating a caller's incomplete call notification method when a called terminal is No Answer to an outgoing call in a call waiting state according to a fourth embodiment of the present invention;

7 is a flowchart illustrating a caller's incomplete call notification method when a call waiting state of a called terminal is inactive and busy under the same base station jurisdiction according to a fifth embodiment of the present invention;

8 is a flowchart illustrating a caller's incomplete call notification method when a call waiting state of a called terminal is active under the jurisdiction of the same base station according to the sixth embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: mobile communication system 110: outgoing mobile terminal

112: incoming mobile terminal 120, 120 ': wireless base station

130, 130 ': Mobile switching center 140: SMS center

150: voice mailbox server 152: voice mailbox database

200: Incomplete call notification system 210: CNHP plus server

212: CNHP Database

Claims (46)

In the incomplete call notification system that monitors the status of the called terminal when the outgoing call transmission failure, and notifies the called terminal information when the called terminal can communicate, A mobile terminal which transmits an outgoing call to a called terminal via a mobile communication network to request a call, transmits outgoing information on an incomplete call, or receives and displays the outgoing information from the mobile communication network; When the called terminal is busy or there is no response due to power off, the calling terminal stores the calling information of the mobile terminal after transmitting the calling call of the mobile terminal to the called terminal. An incomplete call notification server (CNHP (Calling Number History Presentation) Plus Server) which notifies the called terminal of the calling information of the mobile terminal when the communication state of the communication state is monitored; And Incomplete call notification system of the caller in the mobile communication network, characterized in that it comprises an incomplete call database for storing the call information of the mobile terminal as data. The method of claim 1, The mobile communication network may include: a mobile switching station that performs a control function for efficiently operating the mobile communication network and an exchange function for a call request of the mobile terminal; A base station transmitter arranged in units of cells and configured to transmit the call request generated from the mobile terminal to the mobile switching center or to locate a location of the mobile terminal existing in a cell area under its control; And And a base station controller which performs various functions required for radio call processing including handoff while controlling and managing a plurality of base stations, and transmits subscriber information of the location-registered mobile terminal to the mobile switching center. Caller's incomplete call notification system. The method according to claim 1 or 2, The mobile terminal includes a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a global system for mobile (GSM) phone, a wideband CDMA (W-CDMA) phone, a CDMA-2000 phone, and a mobile broadband (MBS). Caller's incomplete call notification system in a mobile communication network comprising a phone. The method of claim 2, A visitor location register (VLR) for temporarily storing subscriber information of the mobile terminal when location registration of the mobile terminal is performed; And A home location register (HLR) that stores location information on the mobile terminal and transmits the location information on the called mobile terminal obtained by requesting the called mobile switching center when a call connection request is generated from the mobile terminal. A caller's incomplete call notification system in a mobile communication network, further comprising a Home Location Register. The method of claim 4, wherein The home location register stores a mobile identification number (MIN), an electronic serial number (ESN), and profile information of a subscribed mobile communication service of the mobile terminal. . An incomplete call notification method for monitoring outgoing call status from an outgoing mobile terminal to an incoming mobile terminal and notifying outgoing information when it becomes available to communicate while monitoring the state of the incoming mobile terminal, A first step of sending an outgoing call to the called mobile terminal by the calling mobile terminal; Requesting location information (LOCREQ) of the called mobile terminal including an Originating Service Feature Indicator (OSFI) to the called party's home location register (HLR) for the originating call; A third step of requesting an incomplete call notification service (CNHP) Plus service when the called party's home location register searches for location information of the called mobile terminal and is in a power-off state; A fourth step of processing an incomplete call for the originating mobile terminal; A fifth step of executing the incomplete call notification service and monitoring a communication state of the called mobile terminal to report a power-on state of the called mobile terminal from the called home location register; And And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal. The method of claim 6, In the first step, the originating mobile terminal transmits the outgoing call after performing location registration with respect to the base station that is in charge of the area where it is currently located. In the location registration, the calling mobile switching center requests the location registration of the calling mobile terminal to the calling home location register, and the calling home location register executes the location registration to the calling mobile terminal, In the mobile communication network, the incomplete call notification service is set to transmit a response signal regnot including the OSFI to the originating mobile switching center, and the originating mobile switching center stores and manages registration information of the originating mobile terminal. How to notify the caller of incomplete calls. The method of claim 6, In the fourth step, the calling mobile terminal informs the calling mobile terminal that the called mobile terminal is in a state in which it is unable to make a phone call, and performs an incoming call transfer or performs a voice mail service to transmit a message from the calling mobile terminal. Caller incomplete call notification method in a mobile communication network characterized in that receiving the input. The method of claim 6, The sixth step may be performed in conjunction with a short message service to transmit outgoing information indicating that there is a delivery message from the calling mobile terminal to the called mobile terminal as the short message, A method for notifying an incomplete call of a caller in a mobile communication network, wherein the incomplete call notification message is transmitted to the called mobile terminal using a voice mailbox service. An incomplete call notification method for monitoring outgoing call status from an outgoing mobile terminal to an incoming mobile terminal and notifying outgoing information when it becomes available to communicate while monitoring the state of the incoming mobile terminal, A first step of sending an outgoing call to the called mobile terminal by the calling mobile terminal; A second step of inquiring about a location path of the called mobile terminal including an originating service feature indicator (OSFI) with respect to the outgoing call; Requesting an incomplete call notification service (CNHP (Calling Number History Presentation) Plus Service); A fourth step of processing an incomplete call for the originating mobile terminal; A fifth step of executing the incomplete call notification service and monitoring a communication state of the called mobile terminal to report a call release state of the called mobile terminal from a called home location register; And And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal. The method of claim 10, In the second step, when the originating mobile switching center receives an outgoing call of the originating mobile terminal, the called party home connected to the called mobile switching center based on the MIN (Mobile Identifier Number) number of the called mobile terminal included in the originating call. Sends a location information request message (LOCREQ) of the called mobile terminal to a location register (HLR), The called party home location register (HLR) recognizes that the incomplete call notification service (CNHP Plus) field is activated in the location information request message from the calling mobile switching center, and obtains status information of the called mobile terminal. In order to send a connection path request message (ROUTREQ [O_SFI]) to the destination mobile switching center to receive a response message (routreq [ADR = Busy]) indicating that the destination mobile terminal is busy from the destination mobile switching center. Caller incomplete call notification method in a mobile communication network, characterized in that. The method of claim 11, The called mobile switching center has a case where the called mobile terminal is call waiting (CW) inactive and busy, and a call call inactive (NCW) inactive and data busy. In the case of, the mobile communication network comprising an access denied reason (ADR) (= Busy) in a routing request return result and transmitting a response message to the called party's home location register (HLR). How to notify the caller of incomplete calls. The method of claim 10, In the third step, the called party home location register (HLR) confirming that the called mobile terminal is busy transmits an incomplete call notification service request message (SERVREQ) to the incomplete call notification server, The incomplete call notification server, in response to the incomplete call notification service request message from the called party's home location register (HLR), includes a response message (Servreq [Result = CNHP Plus Perform]). Caller's incomplete call notification method in the mobile communication network, characterized in that for transmitting to the called party's home location register (HLR). The method of claim 10, In the fourth step, the originating home location register (HLR) transmits a location information response message (locreq [ADR = Inactive]) to the originating mobile switching center based on the response message received from the incomplete call notification server. The mobile switching center handles an incomplete call to the originating mobile terminal. The method of claim 14, In the fourth step, the calling mobile terminal informs the calling mobile terminal that the called mobile terminal is in a busy state, performs incoming call switching or performs a voice mail service to receive and store a delivery message from the calling mobile terminal. Caller incomplete call notification method in a mobile communication network, characterized in that the. The method of claim 10, In the fifth step, the destination home location register (HLR) includes the information that the current trace type (Trace Type) is set to busy (Busy) to report the change in the communication state of the destination mobile terminal 112 Send an activated Trace Mode (ATM) message (ATM [TraceType = Busy]) to the destination mobile switching center, The called mobile switching center transmits the active tracking mode response message (atm [TraceingResult = Acceptable]) to the called party's home location register (HLR) while monitoring the communication state of the called mobile terminal. Detect call release and transmit a Report Trace Subscriber Activity (RTSA) message notifying call release to the called party's home location register (HLR), And the called party home location register (HLR) receives communication status information (RTSA) of the called mobile terminal from the called mobile switching center. The method of claim 16, When the communication state of the terminating mobile terminal is not in a call, the terminating mobile switching center processes the return result as "Tracing Result = Not Applicable, Trace Facilities Denied = Busy Applicable". How to notify you of incomplete issues. The method of claim 16, The called party home location register (HLR) transmits a Deactivate Trace Mode (DTM) message to the called mobile switching center, thereby releasing a state change report to the called mobile terminal of the called mobile switching center. The called mobile switching center releases a report of a change in state of the called mobile terminal and transmits a response signal dtm [TraceType = Busy] to the called party's home location register (HLR). How to notify you of incomplete issues. The method of claim 18, The called party home location register (HLR) recognizes that the called mobile terminal has changed from the busy state to the idle state and transmits state change information (SVCINFODIR) to the incomplete call notification server. How to notify caller's incomplete call in communication network. An incomplete call notification method for monitoring outgoing call status from an outgoing mobile terminal to an incoming mobile terminal and notifying outgoing information when it becomes available to communicate while monitoring the state of the incoming mobile terminal, A first step of sending an outgoing call to the called mobile terminal by the calling mobile terminal; Obtaining a location information (TLDN: Temporary Local Destrict Number) by querying a location path of the called mobile terminal including an originating service feature indicator (OSFI) with respect to the originating call; A third step of requesting a Calling Number History Presentation (CNHP) Plus Service (CNHP) when another call is set up between the called mobile terminal and another terminal with respect to the location information; A fourth step of processing an incomplete call for the originating mobile terminal; A fifth step of executing the incomplete call notification service and monitoring a communication state of the called mobile terminal to report a call release state of the called mobile terminal from a called home location register; And And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal. The method of claim 20, In the second step, when the originating mobile switching center receives an outgoing call of the originating mobile terminal, the called party home connected to the called mobile switching center based on the MIN (Mobile Identifier Number) number of the called mobile terminal included in the originating call. Sends a location information request message (LOCREQ) of the called mobile terminal to a location register (HLR), The called party home location register (HLR) recognizes that the incomplete call notification service (CNHP Plus) field is activated in the location information request message from the calling mobile switching center, and obtains status information of the called mobile terminal. Send a connection path request message (ROUTREQ [O_SFI]) to the destination mobile switching center in order to When the terminating mobile terminal is in an idle state, the terminating mobile switching center includes a location information (TLDN) indicating the waiting state in a routing request return result and includes a response message (routreq [TLDN]). Transmits to the called party's home location register (HLR), The called party's home location register (HLR) transmits a response message (routreq [TLDN]) for the access route request message (ROUTREQ) to the calling mobile switching center. Way. The method of claim 20, In the third step, when a call path is established between the originating mobile switching center and the called mobile switching center, and the called mobile switching center is in a busy state, the terminating mobile terminal is TTN (Transfer) under the condition of "Term Trigger = Busy". Send a TTN request message (TTNREQ) requesting To Number) to the called party's home location register (HLR), When the called party's home location register (HLR) confirms that the called mobile terminal is busy, it transmits an incomplete call notification service request message (SERVREQ) to the incomplete call notification server. The incomplete call notification server transmits a response message (Servreq) including an incomplete call notification service to the called party's home location register (HLR) in response to the incomplete call notification service request message. The called party home location register (HLR) transmits a TTN response message (ttnreq) for the TTN request message (TTNREQ) to the destination mobile switching center based on the response message (servreq). How to notify the caller of incomplete calls. The method of claim 22, The TTN request message (TTNREQ) includes a "RED (Redirection) Reason = Busy" indicating that the call is busy with the calling number (MIN) when the voice or data is "Busy", and also in the access path request message (ROUTREQ). A method for notifying an incomplete call of a caller in a mobile communication network, comprising the received OSFI. The method of claim 20, In the fourth step, the originating mobile switching center notifies the originating mobile terminal that the called mobile terminal is busy and receives an incoming message from the originating mobile terminal by performing an incoming call transfer or performing a voice mail service. Caller's incomplete call notification method in a mobile communication network characterized in that. An incomplete call notification method for monitoring outgoing call status from an outgoing mobile terminal to an incoming mobile terminal and notifying outgoing information when it becomes available to communicate while monitoring the state of the incoming mobile terminal, A first step of sending an outgoing call to the called mobile terminal by the calling mobile terminal; Obtaining a location information (TLDN: Temporary Local Destrict Number) by querying a location path of the called mobile terminal including an originating service feature indicator (OSFI) with respect to the originating call; A third step of requesting an incomplete call notification service (CNHP) by forwarding the outgoing call to the called mobile terminal based on the location information and calling a call waiting no answer (CHP); A fourth step of processing an incomplete call for the originating mobile terminal; A fifth step of executing the incomplete call notification service and monitoring a communication state of the called mobile terminal to report a call release state of the called mobile terminal from a called home location register; And And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal. The method of claim 25, In the first step, the originating mobile terminal transmits the outgoing call in the mobile communication network characterized in that the outgoing call is sent to the wireless base station for jurisdiction of the area where the originating mobile station is located. The method of claim 26, The location registration, the originating mobile switching center requests the originating mobile location register (HLR) to register the location of the originating mobile terminal, The originating home location register (HLR) executes location registration for the calling mobile terminal, sets an incomplete call notification service as a location registration response, and generates a response signal including an originating service features indicator (OSFI). A caller's incomplete call notification method in a mobile communication network, characterized by transmitting to an originating mobile switching center. The method of claim 25, In the second step, in order to obtain status information of the called mobile terminal, the access path request message ROUTREQ [O_SFI] is transmitted to the called mobile switching center. When the terminating mobile terminal is in an idle state, the terminating mobile switching center includes a location information (TLDN) indicating a waiting state in a routing request return result and includes a response message (routreq [TLDN]). To the called party's home location register (HLR), The called party's home location register (HLR) transmits a response message (routreq [TLDN]) for the access route request message (ROUTREQ) to the calling mobile switching center. Way. The method of claim 25, In the third step, the called mobile switching center establishes a call path with the calling mobile switching center and transmits a "Waiting Tone" to the called mobile terminal via a wireless base station, but the called mobile terminal does not answer (No Answer). In one case, a TTN request message (TTNREQ) requesting TTN (Transfer To Number) is sent to the called party's home location register (HLR) under the condition "Term Trigger = Busy". When the called party's home location register (HLR) determines that the called mobile terminal is a call waiting answer (CW No Answer), it transmits the incomplete call notification service request message (SERVREQ) to the incomplete call notification server, The incomplete call notification server, in response to the incomplete call notification service request message, sends a response message (servreq [Result = CNHP Plus Perform]) including performing the incomplete call notification service to the called party's home location register (HLR). Sender incomplete call notification method in a mobile communication network, characterized in that for transmitting to. The method of claim 29, The TTN request message (TTNREQ) includes a "RED (Redirection) Reason = Busy" indicating that the caller is busy with the calling number (MIN) when the voice or data is "Busy", and is received in the access path request message (ROUTREQ). Caller incomplete call notification method in a mobile communication network comprising the OSFI. The method of claim 25, In the fourth step, the originating mobile switching center notifies the originating mobile terminal that the called mobile terminal is busy and receives an incoming message from the originating mobile terminal by performing an incoming call transfer or performing a voice mail service. Caller's incomplete call notification method in a mobile communication network characterized in that. An incomplete call notification method of notifying outgoing information when an outgoing call is unsuccessfully transmitted from an outgoing mobile terminal to an inbound mobile terminal, when the inbound mobile terminal becomes in a state of communication. A first step of transmitting a location information request message (LOCREQ) for inquiring about the location of the called mobile terminal to the home location register (HLR) for the outgoing call; A second step of receiving a response message indicating a location answering request (LOCREQ) indicating a Busy No Answer including an Originating Service Feature Indicator (OSFI); Sending a Transfer To Number (TTN) request message (TTNREQ) to the home location register (HLR), the home location register to the incomplete call notification server (CNHP (Calling Number History Presentation) Plus Service) Requesting a third step; A fourth step of processing an incomplete call for the originating mobile terminal and performing the incomplete call notification service; Receiving a call release status of the called mobile terminal from the home location register (HLR) monitoring the communication state of the called mobile terminal; And And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal. The method of claim 32, In the first step, the originating mobile terminal transmits the outgoing call in the mobile communication network characterized in that the outgoing call is sent to the wireless base station for jurisdiction of the area where the originating mobile station is located. The method of claim 32, In the third step, the incomplete call notification server, in response to the request of the incomplete call notification service, sends a response message (servreq [Result = CNHP Plus Perform]) including the execution of the incomplete call notification service to the home location. A method for notifying an incomplete call of a caller in a mobile communication network, characterized in that being transmitted to a register (HLR). The method of claim 32, In the third step, the TTN request message (TTNREQ) includes "RED (Redirection) Reason = Busy" indicating that the call is busy with the calling number (MIN), the OSFI received in the location path request message (LOCREQ) Caller incomplete call notification method in a mobile communication network comprising a. The method of claim 32, The fifth step may include, from the home location register (HLR), that the trace type of the called mobile terminal is set to Busy, and the change of the communication state of the called mobile terminal is included. A method for notifying an incomplete call of a caller in a mobile communication network, characterized by receiving an Activate Trace Mode (ATM) message (ATM [TraceType = Busy]) for reporting. The method of claim 32, In the fourth step, the originating mobile switching center notifies the originating mobile terminal that the called mobile terminal is busy and receives an incoming message from the originating mobile terminal by performing an incoming call transfer or performing a voice mail service. Caller's incomplete call notification method in a mobile communication network characterized in that. The method of claim 36, Recognizing a call release state of the called mobile terminal, transmitting a report trace subscriber activity (RTSA) message informing of the call release to the home location register (HLR), Receiving a caller's incomplete call in a mobile communication network, receiving a Deactivate Trace Mode (DTM) message in response to the RTSA message from the home location register (HLR) and releasing a status change report to the called mobile terminal Notification method. An incomplete call notification method of notifying outgoing information when an outgoing call is unsuccessfully transmitted from an outgoing mobile terminal to an inbound mobile terminal, when the inbound mobile terminal becomes in a state of communication. A first step of transmitting a location information request message (LOCREQ) for inquiring about the location of the called mobile terminal to the home location register (HLR) for the outgoing call; A second step of receiving a response message indicating a call waiting no answer including an Originating Service Feature Indicator (OSFI) from the home location register (HLR); Sending a Transfer To Number (TTN) request message (TTNREQ) to the home location register (HLR), the home location register to the incomplete call notification server (CNHP (Calling Number History Presentation) Plus Service) Requesting a third step; A fourth step of processing an incomplete call for the originating mobile terminal and performing the incomplete call notification service; Receiving a communication waiting state of the called mobile terminal from the home location register (HLR) monitoring the communication state of the called mobile terminal; And And a sixth step of transmitting outgoing information of the outgoing mobile terminal to the called mobile terminal. The method of claim 39, In the second step, the call waiting non-response causes the originating mobile switching center to transmit a waiting tone for an outgoing call to the called mobile terminal via a wireless base station, and transmits the incoming call from the called mobile terminal to the originating call. The caller's incomplete call notification method in the mobile communication network characterized in that it is determined that the transmission time of the incoming signal has elapsed (Time Out For Call Waiting / Nate Call Waiting). The method of claim 39, In the third step, when the originating mobile switching center receives the response message from the home location register (HLR), it transmits a TTN (Transfer To Number) under the condition of Term Trigger = No Answer. And transmitting the requesting TTN request message (TTNREQ [CPND1, MIN, O_SFI, REDReason = CW NA]) to the home location register (HLR). The method of claim 39, In the first step, the originating mobile terminal transmits the outgoing call in the mobile communication network characterized in that the outgoing call is sent to the wireless base station for jurisdiction of the area where the originating mobile station is located. The method of claim 39, In the third step, the TTN request message (TTNREQ) includes "RED (Redirection) Reason = Busy" indicating that the call is busy with the calling number (MIN), the OSFI received in the location path request message (LOCREQ) Caller incomplete call notification method in a mobile communication network comprising a. The method of claim 39, The fifth step is to report that the trace type (Trace Type) of the incoming mobile terminal is set to Busy from the home location register (HLR), and then the communication state change of the incoming mobile terminal is reported. A method for notifying an incomplete call of a caller in a mobile communication network, characterized by receiving an Activate Trace Mode (ATM) message (ATM [TraceType = Busy]). The method of claim 39, In the fourth step, the originating mobile switching center notifies the originating mobile terminal that the called mobile terminal is busy and receives an incoming message from the originating mobile terminal by performing an incoming call transfer or performing a voice mail service. Caller's incomplete call notification method in a mobile communication network characterized in that. The method of claim 44, Upon recognizing a call release state of the called mobile terminal, a RTSA (Report Trace Subscriber Activity) message indicating a call release is transmitted to the home location register (HLR), Receiving a caller's incomplete call in a mobile communication network, receiving a Deactivate Trace Mode (DTM) message in response to the RTSA message from the home location register (HLR) and releasing a status change report to the called mobile terminal Notification method.