KR20100102455A - Method for notifying possibility of call and apparatus thereof - Google Patents

Abstract

PURPOSE: A method for notifying possibility of a call and an apparatus thereof are provided to supply a user friendly service in a mobile communication service by enhancing a function fro setting up a call possibility alarm point. CONSTITUTION: A reception exchange(400) senses a call state of a reception terminal and provides a mobile communication service for the reception terminal, and a home location register notifies to originating terminal a call enable state of the reception terminal. An alarm setting unit(620) sets up the call enable alarm for a corresponding originating subscriber, and an alarm control unit(660) performs the call enable alarm of the reception terminal by controlling an alarm processing unit(630).

Description

Call Me Notification Method and Device {METHOD FOR NOTIFYING POSSIBILITY OF CALL AND APPARATUS THEREOF}

The present invention relates to an additional service provided in a mobile communication network, and more particularly, to a call possibility notification method and apparatus for notifying a calling terminal that a call is possible when a called terminal that is in a call-free state becomes available.

Recently, mobile communication providers provide a variety of additional services for users, and among them, a very useful service for users, when the called terminal is not available when the calling terminal makes a call to the called terminal, the called terminal is called When the call is available, a call availability notification service is provided to notify the caller of possible calls through a message.

Such call availability notification service has the advantage of preventing the user of the calling terminal (hereinafter referred to as a "calling subscriber") from continuously making a call to know that the called terminal is available. If the user of the called terminal (hereinafter referred to as "called subscriber") makes another call using the called terminal while transmitting the information to the calling terminal after receiving it, the calling subscriber who received the message that the called terminal is available to call When a call is made to the called terminal, there is a problem that the called terminal is busy, resulting in a call notification service not operating normally.

In addition, if the incoming subscriber registers for a service (hereinafter referred to as a "reception alert service") that notifies the incoming call with the telephone number of the calling terminal when the incoming call is not received, the incoming subscriber may be in a callable state. When the called party is in a state of incapable calling of the called party, the call is sent to the called terminal from the called terminal to the called terminal. Therefore, when the calling subscriber who has received the call availability state of the called terminal by the callable notification service makes a call to the called terminal, at the same time, the call is delivered from the calling terminal during the call unavailable state by the reception notification service described above. If the called party also makes a call to the calling terminal, a call collision occurs between the calling terminal and the called terminal, and as a result, the calling subscriber cannot make a phone call with the called party. There is a problem that results.

The technical problem to be achieved by the present invention is to notify the calling subscriber when the called terminal is truly available by allowing the calling subscriber to directly control the time at which the calling terminal can notify the calling terminal of the available state of the called terminal. The present invention provides a callable notification method and apparatus for allowing a callable notification service to operate normally by preventing a callable notification service from colliding with another service.

Callable notification method according to one feature of the present invention for achieving the technical problem,

CLAIMS 1. A method for notifying a calling terminal of a called terminal of a called terminal by a home location register, the method comprising: receiving a call request from a calling terminal switched due to a disabling state of a called terminal; Setting a destination exchange to monitor a call state of the destination terminal; And notifying the calling terminal that the called terminal is in a callable state when the call state of the called terminal reported from the called exchange is in a callable state and the callable state is maintained for a preset time.

Callable notification device according to another feature of the present invention,

An apparatus for notifying a caller of a called terminal to a calling terminal, the apparatus comprising: a called exchanger that provides a mobile communication service for a called terminal, and detects a call state of the called terminal; When a call request from the calling terminal switched due to the unavailable state of the called terminal is received, the called exchange is set to monitor the call state of the called terminal, and the call state of the called terminal reported from the called exchange is set. Is a callable state, and the callable state includes a home location register that informs the calling terminal that the called terminal is in a callable state when the callable state is maintained for a preset time.

According to the present invention, the calling party makes a call to the called party when the called terminal is in a true communication state, thereby increasing the probability that the calling party succeeds in making a phone call with the called party.

In addition, it is possible to provide a user-friendly service in a mobile communication service by strengthening a function that the calling subscriber can set a call notification time in the call notification service so that collision with other services does not occur.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. .

In the present specification, a base station (BS) is an access point (AP), a radio access station (Radio Access Station, RAS), a Node B (Node B), a base transceiver station (Base Transceiver Station, BTS), MMR ( Mobile Multihop Relay) -BS and the like, and may include all or part of functions such as an access point, a radio access station, a Node B, a base transceiver station, and an MMR-BS.

Now, a method and a device for notifying of a call according to an embodiment of the present invention will be described in detail.

In general, there are a number of cases where the called terminal is in a call-free state, when there is a call, when it is turned off, and when it is out of a call right. However, it should be noted that the embodiments of the present invention are not limited only to a call, but are applicable to a case where a call cannot be made such as a power off or a call-out of the call. Ramen would be easy to understand.

1 is a diagram schematically illustrating a mobile communication network to which a call possibility notification method according to an embodiment of the present invention is applied.

As shown in FIG. 1, a mobile communication network to which a call notification method according to an embodiment of the present invention is applied includes an originating exchange 200, a destination exchange 400, and a home location register 600. And a Short Message Service Center (SMSC) 700.

The originating exchange 200 is connected to the mobile communication network 300 to provide a mobile communication service for the originating terminal 100 of the originating subscriber. Of course, the originating terminal 100 is connected to the originating exchange 200 through a base station system (not shown), but such a configuration is already well known, and embodiments of the present invention are not specifically described for the sake of brevity. Omit.

The destination exchange 400 is connected to the mobile communication network 300 to provide a mobile communication service for the destination terminal 500 of the called subscriber. Of course, the terminating terminal 500 is also connected to the terminating exchange 400 through a base station system (not shown), but such a configuration is already well known and thus omitted in the embodiment of the present invention without specifying it in detail.

The HLR 600 stores and manages subscriber information, additional service information for each subscriber, and location information of the mobile terminals 100 and 500 through the mobile communication network 300. In addition, in the embodiment of the present invention, if the registration of the rule of the call possibility notification service is required from the calling terminal 100, the rule is registered and managed in the profile of the calling subscriber. In addition, the HLR 600 may make a call using the rules registered in the calling party's profile when the called terminal 500, which is requested to call from the calling terminal 100, is in a disabled state, that is, in the embodiment of the present invention. Perform a notification service.

The SMSC 700 is a device that provides a service for transmitting a message such as a multimedia message, a short message, and the like between mobile terminals.

FIG. 2 is a detailed block diagram of the HLR 600 shown in FIG. 1.

As shown in FIG. 2, the HLR 600 includes a profile storage unit 610, a notification setting unit 620, a notification processing unit 630, a timer 640, a counter 650, and a notification control unit 660. do.

The profile storage unit 610 stores various kinds of information related to the calling subscriber. In particular, the embodiment of the present invention stores a rule for the additional service subscribed to by the calling subscriber, that is, whether or not the callable notification service is subscribed, and the callable notification service from the calling subscriber when the subscriber subscribes to the callable notification service. Here, the rule for the call notification service stored in the profile storage unit 610 may be registered by the rule registration method through a feature code or the reception through a call center of a mobile communication network using the calling terminal 100. Can be. Here, the rule for the call notification service stored in the profile storage unit 610 is a rule for time and count.

When the call is requested from the calling subscriber who subscribed to the callable notification service, the notification setting unit 620 sets a callable notification for the calling subscriber. When a call request from the calling subscriber having the available call notification is set again due to a busy call of the called terminal 500, the call available notification service to the called terminal 500 is started.

The notification processor 630 may request that the notification controller 660 monitor and notify the call availability state of the called terminal 500 when the callable notification service for the called terminal 500 is started. send. Then, the time point is determined according to the call state of the destination terminal 500 transmitted from the destination exchange 400 and the values of the timer 640 and the counter 650 set by the notification processor 630, and the destination terminal 500 is determined. The SMSC 700 transmits a message transmission request for notifying the calling terminal 100 that the call is possible.

The timer 640 is controlled by the notification processor 630 to count the time set as a rule for the callable notification service of the calling subscriber stored in the profile storage unit 610. The timer 640 continuously counts the time when the available state of the terminating terminal 500 transmitted from the terminating exchange 400 is maintained, and if the call state of the terminating terminal 9500 is impossible to call before the set time expires. Reset if notified. Thus, the timer 640 is preferably set to count until a time that ensures that the callable state of the called terminal 500 is a true callable state. This time is set by the rules registered by the calling subscriber.

The counter 650 is controlled by the notification processor 630 to count the number of times set as a rule for the callable notification service of the calling subscriber stored in the profile storage unit 610. The counter 650 is controlled by the notification processor 630 to count the available state of the called terminal 500 transmitted from the called exchange 400. The number of times that the counter 650 counts is also preferably set to count up to the number of times to ensure that the callable state of the called terminal 500 is a true callable state. This number is also set by the rules registered by the calling subscriber.

The notification control unit 660 controls the profile storage unit 610, the notification control unit 620, and the notification processing unit 630 to allow the destination exchange 400 to monitor the call state of the destination terminal 500, the monitored incoming When the available state of the terminal 500 is maintained for the time set in the rule or when the status report reporting the available state of the call occurs as many times as set in the rule, the fact that the called terminal 500 is available is available to the calling terminal 100. It works to inform.

Hereinafter, a call notification method according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6.

First, in the callable notification method according to an embodiment of the present invention, a rule for determining a callable notification time point in the HLR 600 should be set, which is a feature code using the calling terminal 100. It can be registered by the rule registration method through or through the call center of the mobile communication network. In an embodiment of the present invention, a rule for time and frequency is set as a rule for a call notification service. For example, when the calling subscriber uses the calling terminal 100 to call a rule registration number using a feature code such as "* (feature code) * time * recovery", the call exchanger 200 calls the call HLR 600. And the HLR 600 knows that the call from the calling terminal 100 is a rule registration for the callable notification service, and informs the profile of the calling subscriber of the calling terminal 100 the rule of time and the number of times of rule information associated with the feature code. Save each. For example, when originating from the calling terminal 100 with a number of "* (feature code) * 5 * 2", the profile storage unit 610 of the HLR 600 has a time of 5 seconds for the calling subscriber and the count is counted. A rule is set for the two-call notification service. Since the registration of the supplementary service related information of the subscriber using the feature code is well known, the detailed description is omitted here.

Next, a call availability notification method according to an embodiment of the present invention will be described with reference to FIG. 3.

When the calling subscriber of the calling terminal 100 subscribed to the call possibility notification service makes a call to the called terminal 500, a message (Setup) requesting a call from the calling terminal 100 to the calling exchange 200 is transmitted; S100 and the originating exchange 200 transmits a Send Routing Information (SRI) message, which is a message for requesting transmission of routing information to the HLR 600 in order to know routing information to the called terminal 500 (S101).

The HLR 600 transmits a PRN (Provide Roaming Number) message, which is a message requesting roaming information, to the destination exchange 400 connected to the destination terminal 500 (S102) and the destination terminal 500 from the destination exchange 400. Roaming information is received through the PRN response message (S103) and the roaming information is transmitted to the originating exchange 200 as a response message to the SRI message, which is a routing information transmission request message (S104). At this time, the HLR 600 confirms that the calling subscriber has subscribed to the call possibility notification service, and requests the generation of a Resume Call Handling (RCH) message, which is a call setup retry message, when the destination terminal 500 is busy in a PRN message. Set the TT (Termination Trigger) parameter to transmit to the destination exchange 400. In addition, when the calling subscriber is subscribed to the callable notification service, the HLR 600 sets the callable notification of the calling subscription in the notification setting unit 620.

Therefore, the originating exchange 200 transmits an initial address message (IAM) for the call connection request to the destination exchange 400 based on the routing information transmitted from the HLR 600 (S105).

The destination exchange 400 determines the call state of the corresponding destination terminal 500 after receiving the initial address message from the originating exchange 200, since it is determined that the destination terminal 500 is in a call with another terminal. The destination exchange 400 transmits an RCH message, which is a message requesting to retry call setup, to the originating exchange 200 (S106).

Accordingly, the originating exchange 200 transmits an SRI message, which is a message requesting a call possibility notification, to the HLR 600 (S107). At this time, an Originating Service Indicator (OSI) parameter is set in the SRI message indicating that the calling subscriber is a callable notification subscriber.

Therefore, the HLR 600 receives the call possibility notification request from the originating exchange 200 and if the call originating notification is set in the notification setting unit 620, the HLR 600 is connected to the terminating terminal 500 by the called exchange 400. A SRS (Set Reporting State) message, which is a message requesting a call availability notification, is transmitted (S108). At this time, the SRS message is set to startMonitor, a parameter corresponding to a command to start monitoring the call state of the called terminal 500.

The destination exchange 400 receives the call state monitoring request from the HLR 600 and measures to monitor the call state of the called terminal 500, and then transmits a response to the call state monitoring request to the HLR 600 (S109). . At this time, the destination exchange 400 transmits a response by setting a parameter indicating a busy state (notIdle) which is a call state of the called terminal 500 at that time to inform that call state monitoring has been started.

Next, the HLR 600 sets the busy state of the called terminal 500 transmitted from the called exchange 400 in response to the call possibility notification request message of step S107 and transmits it to the calling exchange 200. (S110).

Thereafter, the originating exchange 200 transmits an announcement to the calling terminal 100 that the called terminal 500 is busy because the call availability notification service is started (S111), and then disconnects the call other than the calling terminal 100 ( S112).

As such, when the called terminal 500 is busy and the call exchange notification operation is set in the called exchange 400, when the called subscriber disconnects the phone call from another terminal, the called terminal 500 becomes available. The incoming exchange 400, which has been monitoring this, recognizes the transfer of the called terminal 500 to the available call state and enables the called terminal 500 to call a SR (Status Report) message, which is a status report message indicating a call availability state. Idle, which is a parameter representing a state, is set and transmitted to the HLR 600 (S113).

The notification processing unit 630 of the HLR 600 receives the first status report message indicating that the called terminal 500 is available for call from the called exchange 400, and then drives the timer 640 to start the time count. (S114).

When the timer 640 thus driven is counted until the time set in the rule of the originating subscriber of the profile storage unit 610 expires, there is no call state report from the destination exchange 400 to the destination terminal 500 (S115). ), The notification processor 630 determines that the called terminal 500 is in a true call state, and sends a message indicating that the called terminal 500 is in a call state to the calling terminal 100 through the SMSC 700. It transmits (S116).

Then, the notification processing unit 630 transmits an SRS message which is a message for releasing the call state monitoring of the terminating terminal 500 to the terminating exchange 400 (S117). At this time, in the SRS message, a stopMonitor, which is a parameter corresponding to a command for releasing the call state monitoring of the called terminal 500, is set.

As such, when the HLR 600 maintains the available state of the called terminal 500 for the time set in the rule registered by the calling subscriber, the called terminal 500 is regarded as a true callable state and can be called. By sending a message to the calling terminal 100, the success rate of the phone call between the calling terminal 100 and the called terminal 500 becomes very high. In the embodiment of the present invention, the case where the time set in the rule registered by the calling subscriber is 0 may be considered to be similar to the conventional case. Therefore, in the exemplary embodiment of the present invention, it is very advantageous in that the calling subscriber can freely set the time at which the called terminal 500 sends a call notification message through time.

Next, with reference to FIG. 4, a call notification method in which a time point is set by the number of times set in a rule will be described.

First, in the embodiment of the present invention, for simplicity, it is assumed that the number of times registered in the rule stored by the calling subscriber and set in the rule is 610. However, it will be readily understood by those skilled in the art that the number set in the rule can be set to a natural number other than two.

Processes S200 to S214 shown in FIG. 4 are the same as processes S100 to S114 shown in FIG. 3, and the descriptions of the processes S200 to S214 are omitted here. And explain the following procedure.

The notification processing unit of the HLR 600 is started after the timer 640 is started to be driven by receiving the state of the called terminal 500 from the called exchange 400 that monitors the call state of the called terminal 500. In operation 213, since the state report of the available state (Idle) of the called terminal 500 is first received in step S213, the value of the counter 650 is increased to 1 (S215).

Thereafter, when the called subscriber attempts to speak with another terminal before the time counted by the timer 640 is counted until the time set in the rule expires, the called terminal 500 becomes in a busy state, A status report indicating that the called terminal 500 is notIdle from one destination exchange 400 is transmitted to the HLR 600 through an SR message (S216).

As described above, since the called terminal 500 is out of the callable state and becomes in a busy state again, the notification processor 630 stops driving the timer 640 and initializes the timer 640 (S217).

Thereafter, when the called subscriber terminates the call, the called terminal 500 is switched to the available call state again, and the state reporting that the called terminal 500 is available for call (Idle) from the called exchange 400 recognizes the SR. The message is transmitted to the HLR 600 through the message (S218).

Therefore, since the notification processor 630 receives the status report of the available state (Idle) of the called terminal 500 a second time in step S218, the notification processor 630 increases the value of the counter 650 to count it as 2 (S219). ).

As such, since the value of the counter 650 becomes 2, which is equal to the number of times set in the rule registered by the calling subscriber, the notification processing unit 630 transmits a message indicating that the called terminal 500 is available for call through the SMSC 700. It transmits to the calling terminal 100 (S220).

Then, the notification processing unit 630 transmits an SRS message which is a message for releasing the call state monitoring of the destination terminal 500 to the destination exchange 400 (S221).

As such, when the status report indicating that the called terminal 500 is in a callable state is reported from the called exchange 400 as many times as the number of times that the HLR 600 is set in the rule registered by the calling subscriber, the called terminal 500 becomes true. By reporting that the call is possible and transmitting the call notification message to the calling terminal 100, the success rate of the phone call between the calling terminal 100 and the called terminal 500 is very high.

In the embodiment of the present invention, the case where the number of times set in the rule registered by the calling subscriber is 1 may be regarded as similar to the conventional case. Therefore, in the exemplary embodiment of the present invention, it is very advantageous in that the calling subscriber can freely set the time point at which the called terminal 500 sends a call notification message.

On the other hand, while the above has been described that the receiving subscriber is processed regardless of whether or not subscribed to the reception notification service, but the rule can be applied only to the case that the receiving subscriber subscribes to the reception notification service, so with reference to FIG. It describes the available call notification method.

Here, for the sake of simplicity, it is assumed that a specific time is set in the rule registered by the calling subscriber and stored in the profile storage unit 610, and the number of times is set to two. However, it will be readily understood by those skilled in the art that the number set in the rule can be set to a natural number other than two.

Processes S300 to S313 illustrated in FIG. 5 are the same as processes S100 to S113 illustrated in FIG. 3, and the descriptions of the processes S300 to S313 are omitted here. And explain the following procedure.

When the terminating terminal 500 receives the first status report of the available call state (Idle) from the terminating exchange 400, the notification processing unit 630 of the HLR 600 is connected to the terminating subscriber stored in the profile storage unit 610. Through the profile, it is determined whether or not the incoming subscriber subscribes to the reception notification service, which is a service that notifies the user of the incoming call as a message along with the telephone number of the calling terminal when the incoming call is not received while the call is unavailable (S314).

If it is determined that the called subscriber does not subscribe to the reception notification service, the called terminal 500 calls the calling terminal 100 by the called subscriber in a call enabled state, so that a call collision does not occur. The notification processing unit 630 reports that the state of 500 is a true callable state and transmits a message indicating that the called terminal 500 is in a callable state to the calling terminal 100 through the SMSC 700 (S315).

In addition, the notification processor 630 transmits an SRS message, which is a message for releasing the call state monitoring of the called terminal 500, to the called exchange 400 (S316).

If it is determined in step S314 that the called subscriber subscribes to the reception notification service, the notification processing unit 630 starts the time count by driving the timer 640 (S317) and simultaneously sets the value of the counter 650. The count is incremented to 1 (S318).

When the timer 640 thus driven is counted until the time set in the rule of the originating subscriber expires, if there is no call status report from the destination exchange 400 to the destination terminal 500 (S319), the notification processing unit 630 Determines that the called terminal 500 is in a true call state and transmits a message indicating that the called terminal 500 is in a call state to the calling terminal 100 through the SMSC 700 (S320).

The notification processor 630 transmits an SRS message, which is a message for releasing the call state monitoring of the called terminal 500, to the called exchange 400 (S321).

As such, when the HLR 600 maintains a callable state of the called terminal 500 for a time set in a rule registered by the calling subscriber only when the called subscriber subscribes to the reception notification service, the called terminal 500 Is considered to be a true call state and transmits a call availability notification message to the calling terminal 100, the success rate of the phone call between the calling terminal 100 and the called terminal 500 is very high.

Next, referring to FIG. 6, a case in which a called subscriber subscribes to a reception notification service is limited, and a call enabled notification method in which a time point is set by the number of times set in a rule will be described.

Here, for the sake of simplicity, it is assumed that a specific time is set in the rule registered by the calling subscriber and stored in the profile storage unit 610, and the number of times is set to two. However, it will be readily understood by those skilled in the art that the number set in the rule can be set to a natural number other than two.

Processes S400 to S418 illustrated in FIG. 6 are the same as processes S300 to S318 illustrated in FIG. 5, and the descriptions of the processes S400 to S418 are omitted here. And explain the following procedure.

The notification processor 630 of the HLR 600 drives the timer 640 to start a time count (S417), and simultaneously increases the value of the counter 650 to 1 (S418), and then at the timer 640. If the called subscriber tries to talk to another terminal before the time counted until the time set in the rule expires, the called terminal 500 is in a busy state, and the called terminal 400 receives a call from the called exchange 400. The status report indicating that the terminal 500 is not idle is transmitted to the HLR 600 through the SR message (S419).

As described above, since the called terminal 500 is out of the callable state and becomes in a busy state again, the notification processor 630 stops driving the timer 640 and initializes the timer 640 (S420).

Thereafter, when the called subscriber terminates the call, the called terminal 500 is switched to the available call state again, and the state reporting that the called terminal 500 is available for call (Idle) from the called exchange 400 recognizes the SR. The message is transmitted to the HLR 600 (S421).

Accordingly, since the notification processor 630 receives the status report of the available state (Idle) of the called terminal 500 a second time in step S421, the notification processor 630 increases the value of the counter 650 to count it as 2 (S422). ).

As such, since the value of the counter 650 becomes 2, which is equal to the number of times set in the rule registered by the calling subscriber, the notification processing unit 630 transmits a message indicating that the called terminal 500 is available for call through the SMSC 700. It transmits to the calling terminal 100 (S423).

The notification processor 630 transmits an SRS message, which is a message for releasing the call state monitoring of the called terminal 500, to the called exchange 400 (S424).

As such, when the HLR 600 subscribes to the reception notification service, the status report that the destination terminal 500 is available for the call is as many as the number set in the rule registered by the calling subscriber. When reported from the terminating terminal 500 is reported to be a true call state by sending a call notification message to the calling terminal 100, the success rate of the phone call between the calling terminal 100 and the called terminal 500 is very high.

On the other hand, in the above description has been described on the assumption that only a call is not available, but the technical scope of the present invention is not limited to this, even in the case of other non-callable state, for example, the power-off state of the terminating terminal or the call right out of state. As described above, anyone skilled in the art can understand that the phone call success rate between the calling terminal and the called terminal can be very high by sending a call notification message to the calling terminal when the called terminal is in a true call state. I will understand.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a diagram schematically illustrating a mobile communication network to which a call possibility notification method according to an embodiment of the present invention is applied.

FIG. 2 is a detailed block diagram of the HLR shown in FIG. 1.

3 is a flowchart of a call possibility notification method in which a time point is set by a time set in a rule according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating a call possibility notification method in which a time point is set by a number of times set in a rule according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a call possibility notification method in which a time point is determined by whether to subscribe to a reception notification service and a time set in a rule according to an exemplary embodiment of the present invention.

6 is a flowchart of a call notification method in which a time point is determined based on whether a subscription is received and a number of times set in a rule according to an exemplary embodiment of the present invention.

Claims (16)

In the method of the home location register to inform the calling terminal of the available state of the called terminal, Receiving a call request from the calling terminal, which has been switched due to the unavailable state of the called terminal; Setting a destination exchange to monitor a call state of the destination terminal; And Informing the calling terminal that the called terminal is in a callable state when the call state of the called terminal reported from the called exchange is in a callable state and the callable state is maintained for a preset time; Callable notification method comprising a. The method of claim 1, Between the setting step and the telling step, And recognizing a change in the call state of the called terminal and reporting the changed call state of the called terminal from the called exchange. The method of claim 2, Informing the above steps, Determining whether a call state of the called terminal is in a callable state; Driving a timer for counting time when the call state of the called terminal is in a callable state; Terminating driving of the timer when the call state of the called terminal reported from the called exchange terminal is not available until the time counted by the timer has passed the preset time; And Notifying the calling terminal that the called terminal is in a callable state; Callable notification method comprising a. The method of claim 3, In the informing step, when the call state of the called terminal does not remain in a callable state for the preset time, the preset number of times that the call state of the called terminal is reported as available by the called exchange is set. Call notification method characterized in that it informs the calling terminal that the called terminal is available when the call. The method of claim 4, wherein The number of times a report is received from the destination exchange that the called terminal is in a callable state is counted through a counter, and when the number of times counted by the counter reaches the preset number, the calling terminal is in a callable state. Call notification method, characterized in that to inform. The method according to claim 4 or 5, And the preset time is set by a rule registered by the calling subscriber of the calling terminal. The method of claim 6, And the preset number of times is set by the rule. The method of claim 7, wherein And the rule is registered from the calling subscriber by a feature code or registered through a call center. The method according to claim 4 or 5, The timer and the counter indicate that the called subscriber of the called terminal receives a reception notification service, where the incoming notification service receives a call when the called subscriber fails to answer a call made while the called subscriber is in a unavailable state. The service is a service that notifies you by a message. In the device for informing the calling terminal of the available state of the called terminal, A destination exchange providing a mobile communication service to a destination terminal and capable of detecting a call state of the destination terminal; When a call request from the calling terminal switched due to the unavailable state of the called terminal is received, the called exchange is set to monitor the call state of the called terminal, and the call state of the called terminal reported from the called exchange is set. Is a callable state and the home location register notifies the calling terminal that the called terminal is in a callable state when the callable state is maintained for a preset time. Callable notification device comprising a. 10. The method of claim 9, The home location register, A notification setting unit configured to set a callable notification for the calling subscriber when the call is requested from the calling subscriber who has subscribed to the callable notification service; Set the call state monitoring of the called terminal by controlling the called exchanger and inform the calling terminal of the available state of the called terminal based on the call state of the called terminal and the preset time reported from the called exchange. A notification processor for notifying the calling terminal of a possible call state of the called terminal when a time to notify is determined; And A notification controller which controls the notification processor to perform a call availability notification of the called terminal when the call request is switched to the calling subscriber whose call availability notification is set in the notification setting unit; Callable notification device comprising a. The method of claim 11, The home location register, A profile storage unit for storing a rule for the call possibility notification service registered from the calling subscriber, wherein the preset time is set in the rule; And It further includes a timer that counts the time, The notification processing unit notifies the calling terminal of the fact that the called terminal is available when the callable state of the called terminal is maintained until the time counted through the timer elapses. Callable notification device, characterized in that. The method of claim 12, And the driving of the timer is terminated when the call state of the called terminal changes to a non-call state before the preset time elapses. The method of claim 13, The home location register further includes a counter for counting the number of times a report that the called terminal is available from the destination exchange is received, And the notification processing unit notifies the calling terminal that the called terminal is in a callable state when the number of times counted by the counter reaches a preset number. The method of claim 14, And the preset number of times is set in a rule registered by the calling subscriber stored in the profile storage. The method according to claim 14 or 15, The timer and the counter may indicate that the called subscriber of the called terminal receives a receiving notification service, wherein the receiving notification service notifies the caller of the called terminal when the called subscriber does not receive a call that is not available. Call service notification device, characterized in that driven only when subscribed to.

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