JP2000354276A - Call termination transfer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably terminate a call from a caller to a transfer destination terminal while a call termination transfer service is being conducted and to prevent unnecessary transfer. SOLUTION: When a call transfer mode is set, a mobile exchange reads caller information from a subscriber information database and compares the telephone number of a caller with caller information read from the subscriber information database. When the information read from the subscriber information database is matched with the telephone number of the caller, an initial value '1' is set to a counter, the exchange reads a telephone number of a transfer destination indicated by the count from the subscriber information database. Then the exchange conducts the transfer processing to the telephone number. First, the exchange conducts call processing to a mobile communication terminal 4 being the transfer destination 1. When the transfer destination terminal replies the call, a call between the caller and the transfer destination terminal is established.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incoming call transfer system in which, when an incoming call arrives at a mobile communication terminal, the incoming call arrives at another terminal registered in a switching system in advance.

[0002]

2. Description of the Related Art When a mobile communication terminal such as a mobile phone is used, a service provider that provides a communication service in consideration of when the terminal is turned off or when the terminal is out of the radio wave arrival area of a base station. The switching system of this type has a so-called answering machine function and a call transfer function.

[0003] When a user of a mobile communication terminal uses the call transfer function, after applying for use registration to a service provider in advance, the terminal inputs a transfer destination telephone number to the exchange system, Enter the service start number into the exchange system. In that state,
When a call is made to the mobile communication terminal, the exchange system performs an incoming call process for the transfer destination telephone number.

[0004]

However, in the conventional call transfer service, the call is transferred uniformly to the transfer destination set by the user of the mobile communication terminal regardless of the intention of the caller. Also, when the transfer destination is a mobile communication terminal and the terminal is turned off or when the terminal is outside the radio wave arrival area of the base station, the transfer destination terminal does not receive a call even if the incoming call is transferred. .

[0005] Therefore, the present invention provides a method for securely transferring a call from a caller to a transfer destination terminal when a call transfer service is being performed, and further, preventing unnecessary transfer from being performed. It is an object of the present invention to provide a call transfer method that can be prevented.

[0006]

A call transfer system according to the present invention includes a subscriber information database for storing transfer destination information corresponding to a specific caller for each mobile communication terminal, and a mobile switching center for a mobile communication terminal. Comparing means for judging whether or not the caller information registered in the subscriber information database matches the caller for the mobile communication terminal when there is an incoming call; and subscriber information when the comparing means detects a match. Transfer means for performing transfer processing to a transfer destination stored in the database.

[0007] The subscriber information database may be configured to be able to store a plurality of transfer destination information for a specific sender. In this case, the comparing means determines whether or not the caller to the mobile communication terminal matches any of the plurality of pieces of destination information. According to such a configuration, it is possible to increase the possibility that a specific subscriber is connected to the transfer destination.

The subscriber information database can store a general-purpose transfer destination, and the transfer means transfers the general-purpose transfer destination stored in the subscriber information database to the general-purpose transfer destination when the comparison means does not detect a match. It may be configured to perform processing. According to such a configuration, the serviceability of the conventional call transfer system does not decrease.

Further, in this case, when the general-purpose transfer destination is not stored in the subscriber information database,
Alternatively, the transfer processing may not be performed when the transfer processing to the general-purpose transfer destination is not permitted. Such a configuration is particularly effective in preventing unnecessary transfer.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of a communication system to which a call transfer system according to the present invention is applied. In the system shown in FIG. 1, mobile communication terminals 1 to 6, such as mobile phones, are connected to a mobile switching center 20 via base stations 11 to 12. In the mobile switching center 20, signals transmitted to and received from the base stations 11 to 12 are transmitted to the base station connecting unit 2
1 and input / output to / from the control unit 22. The control unit 22
It performs outgoing / incoming call processing and exchange processing. In addition, mobile switchboard 2
0 is connected to a subscriber information database 31. The mobile switchboard 20 is connected to a public telephone network 40 via a public telephone network connection unit 23.
1, 52 can be connected.

Next, the operation will be described with reference to the flowchart of FIG. 2 and the explanatory diagram of FIG. Here, a description will be given focusing on the mobile communication terminal 1. The user of the mobile communication terminal 1 makes a request for registration of a transfer destination telephone number to the mobile switching center 20 in advance. In this embodiment, one or more global transfer destination telephone numbers (general transfer destination telephone numbers) and a plurality of transfer destination telephone numbers corresponding to a specific caller can be registered as transfer destination telephone numbers. However, even if a plurality of global transfer destination telephone numbers can be registered, only one of them is valid.

FIG. 3 is an explanatory diagram showing an example of a transfer destination telephone number registered in the subscriber information database 31. In the example shown in FIG. 3, as the data for the mobile communication terminal 1, the global transfer destination telephone number, the transfer destination telephone number for the caller A (for example, the mobile communication terminal 12), and the caller B (for example, the mobile communication terminal) The transfer destination telephone number for 13) is registered. In this example, up to three transfer destination telephone numbers can be registered.

When the user of the mobile communication terminal 1 registers, for example, a transfer destination telephone number for the caller A, the mobile communication terminal 12 as the caller A is operated by a predetermined dial operation.
Is transmitted to the mobile switching center 20. Further, the telephone numbers of the transfer destinations 1 to 3 for the caller A are transmitted to the mobile switching center 20 by a predetermined dial operation. Here, one or two transfer destination telephone numbers may be registered. The user of the mobile communication terminal 1 also performs addition / change / deletion of the transfer destination by a predetermined dial operation.

[0014] When the mobile communication terminal 1 receives various information on call transfer from the mobile communication terminal 1, the control unit 22 of the mobile switching center 20 registers the information in the subscriber information database 31. Then, when turning on the call transfer mode, the user of the mobile communication terminal 1 dials a number for the call transfer mode and notifies the mobile switching center 20 of the number. Mobile switchboard 20
Upon receiving the notification, the control unit 22 turns on the transfer mode information in the subscriber information database 31.

When there is an incoming call to the mobile communication terminal 1, the control unit 22 of the mobile switching center 20 first checks whether or not the mobile communication terminal 1 is in the call transfer mode based on the subscriber information database 31 (see FIG. 1). Step S11).
If it is not in the incoming call transfer mode, a connection process to the mobile communication terminal 1 is performed (step S12).

When in the call transfer mode, the control unit 22 reads out caller information from the subscriber information database 31. In the example shown in FIG. 3, mobile communication terminals 2 and 3 are registered as sender information. Here, it is assumed that the caller is the mobile communication terminal 2. The control unit 22
The telephone number of the caller is compared with the caller information read from the subscriber information database 31 (step S13).
In this example, the information read from the subscriber information database 31 matches the caller's telephone number, so the process proceeds to step S17.

If there is no information that matches the telephone number of the caller in the information read from the subscriber information database 31, if the global transfer destination telephone number is registered in the subscriber information database 31 (step S14). Then, control is performed to transfer the call from the caller to the transfer destination (step S15), and if it is not registered, a predetermined message is sent to the caller and then disconnection processing is performed (step S16). The predetermined message is an announcement that connection cannot be established.

In step S17, the control unit 22
The counter is set to an initial value “1”, and the transfer destination telephone number indicated by the counter value is read from the subscriber information database 31. Then, a transfer process to the telephone number is performed (step S18). In the example shown in FIG. 3, first, a call process is performed on the mobile communication terminal 4 as the transfer destination 1. If the transfer destination terminal responds (step 19),
A call is established between the caller and the transfer destination terminal (step S2).
0).

If the transfer destination terminal does not respond because the power is turned off or out of the radio wave range (step 19),
The control unit 22 increments the value of the counter by one (step S2).
1). Then, it is checked whether the value of the counter has exceeded the registered number of transfers (step S22). If not, the telephone number of the transfer destination indicated by the counter value is read from the subscriber information database 31 again.
Then, a transfer process to the telephone number is performed (step S).
18).

If it is determined in step S22 that the value of the counter exceeds the registered number of transfers, a disconnection process is performed after transmitting a predetermined message to the sender (step S23).

As described above, according to this embodiment,
A plurality of transfer destinations are registered for a specific caller. Then, if the transfer destination cannot be connected to the first transfer destination, for example, the transfer processing to the next transfer destination is performed. Therefore, for example, it is possible to realize a request to ensure that any terminal receives an incoming call from a caller who needs urgency. In addition, a conventional incoming call transfer can be realized by a global transfer destination telephone number. Furthermore, by registering only a transfer destination of a specific caller without registering a global transfer destination telephone number, it is possible to prevent an unnecessary incoming call such as a wrong telephone from being transferred.

Here, the incoming call transfer system is configured so that a plurality of transfer destinations can be registered for a specific caller, but one transfer destination can be registered. Even in such a case, the effect of preventing an unnecessary incoming call such as a wrong telephone from being forwarded can be exerted.

Further, in this embodiment, when the transfer mode is on, both the transfer destination and the global transfer destination telephone number for a specific caller are valid. Turning on the mode for validating the transfer destination telephone number may be independent. In that case,
The user dials a different number to turn on each mode. Further, in the process shown in FIG. 2, it is determined in step S14 whether or not the global transfer destination telephone number is valid.

In the above embodiment, when there is an incoming call from a specific sender, the transfer processing is performed in the order registered in the subscriber information database 31, but the transfer order is made in the order of registration. It is not necessary. For example, the transfer processing may be performed in the order in which the call charges are lower for the caller. FIG. 4 is a flowchart showing such a process.

In this case, as shown in FIG. 5, location registration information on the transfer destination mobile terminal is also set in the subscriber information database 31. In this case, when there is a call to the mobile communication terminal 1, the subscriber information database 3
1. If there is a phone number that matches the caller's phone number,
The control unit 22 of the mobile switching center 20 determines the position of the calling terminal,
The location of the transfer destination terminal registered in the subscriber information database 31 (area code if the transfer destination terminal is a fixed terminal)
Then, the unit call charge is calculated (step S31).

Further, the terminal having the lowest unit call charge for the calling terminal is determined as the transfer destination (step S3).
2). Then, a transfer process is performed for the determined transfer destination (step S32). When the transfer destination terminal answers (step 19), a call between the caller and the transfer destination terminal is established (step S20).

If the transfer destination terminal does not respond (step 19), the control unit 22 sets the subscriber information database 31
It is confirmed whether or not the transfer processing has been performed for all the transfer destination terminals registered in (step S34). When the transfer process has been performed for all the transfer destination terminals, a disconnection process is performed after transmitting a predetermined message to the caller (step S23). Otherwise, the terminal that has performed the transfer process is excluded, and the process of step S31 is performed again.

In this embodiment, when there is an incoming call to each mobile communication terminal that communicates via the mobile switching center 20, a call transfer method for transferring a call to the transfer destination when a call transfer destination is registered in advance. , A subscriber information database 31 for storing transfer destination information corresponding to a specific caller for each mobile communication terminal, and the control unit 22 of the mobile exchange 20 transmits the subscriber information when an incoming call to the mobile communication terminal is received. It is determined whether or not the caller information registered in the database 31 matches the caller for the mobile communication terminal, and if a match is detected, the caller is included in each transfer stored in the subscriber information database 31. Is configured to perform the transfer process to the transfer destination with the lowest cost, so that the caller of the caller is surely called to the transfer destination terminal. It is Rukoto, prevents an unnecessary transfer is performed, further, it is possible to lighten the burden on the caller.

[0029]

As described above, according to the present invention, the incoming call transfer system uses the caller information registered in the subscriber information database when the mobile exchange receives an incoming call to the mobile communication terminal. A comparison means for determining whether or not the caller matches the caller for the mobile communication terminal; and a transfer means for performing a transfer process to a transfer destination stored in the subscriber information database when the comparison means detects a match. Therefore, when the call transfer service is being performed, the caller's call can be reliably received at the transfer destination terminal,
Further, there is an effect that unnecessary transfer can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example of a communication system to which a call transfer system according to the present invention is applied.

FIG. 2 is a flowchart showing a call transfer process of a mobile exchange.

FIG. 3 is an explanatory diagram showing an example of a transfer destination telephone number registered in a subscriber information database.

FIG. 4 is a flowchart showing another example of the call transfer processing of the mobile exchange.

FIG. 5 is an explanatory diagram showing another example of a transfer destination telephone number registered in a subscriber information database.

[Explanation of symbols]

 1 to 6 mobile communication terminal 11 to 12 base station 20 mobile exchange 21 base station connection unit 22 control unit 23 public telephone network connection unit 31 subscriber information database 40 public telephone network 51, 52 terminal

Claims (4)

[Claims] In a call transfer system for transferring a call to a transfer destination when a call transfer destination is registered in advance when a call is received at each mobile communication terminal communicating via a mobile exchange, A subscriber information database storing transfer destination information corresponding to a specific caller with respect to the terminal, wherein the mobile switchboard has a caller information registered in the subscriber information database when there is an incoming call to the mobile communication terminal; Comparing means for determining whether or not the caller matches the caller for the mobile communication terminal; and transferring means for performing a transfer process to a transfer destination stored in the subscriber information database when the comparing means detects a match. A call transfer method characterized by including: 2. The incoming call transfer system according to claim 1, wherein the subscriber information database can store a plurality of transfer destination information for a specific caller. 3. The subscriber information database is capable of storing a general-purpose transfer destination, and the transfer means, when the comparison means does not detect a match,
3. The incoming call transfer system according to claim 2, wherein transfer processing is performed to a general-purpose transfer destination stored in said subscriber information database. 4. The transfer means according to claim 3, wherein the transfer means does not execute the transfer processing when the general-purpose transfer destination is not stored in the subscriber information database or when the transfer processing for the general-purpose transfer destination is not permitted. Call transfer method.