KR20070002345A - Method for call forwarding service - Google Patents

Abstract

A method for providing a call forwarding service is provided to supply the call forwarding service in a state that an exchange for managing a receiving-side subscriber of an initial call who is in a call unavailable state is not interposed, thereby solving a problem of excessive occupation of exchange system resources. A method for providing a call forwarding service comprises the following steps. An originating-side exchange(5) receives an originating signal, including the phone number of the first receiving-side subscriber(11), from a calling-side subscriber, and then transmits the originating signal to the first receiving-side exchange(15)(S10). The first receiving-side exchange(15) transmits a registered phone number for call forwarding to the originating-side exchange(5). The originating-side exchange(5) transmits the originating signal including the transmitted phone number for call forwarding to the second receiving-side exchange(25)(S34). Finally, the second receiving-side exchange(25) enables communication between the calling-side subscriber and the second receiving-side subscriber(21) by connecting the second receiving-side subscriber(21) to a communication path of the originating-side exchange(S38).

Description

How to provide transfer services {METHOD FOR CALL FORWARDING SERVICE}

1 is a flowchart of a signal in a call transfer service according to the present invention;

The present invention relates to a method for providing a transfer service, and more particularly, when a called party receiving a call of the calling party cannot conduct a call, the call is connected to another predetermined phone number to make a call. It is about how to make it possible.

Among the supplementary services for the existing wired / wireless voice call, there is a call forwarding service for making a call to another number when the called party is unable to make a call while not in a busy or busy state. This transfer service provided by wired / wireless communication service providers is called 'conditional', such as when the incoming subscriber cannot receive an incoming call due to a weak signal or when the incoming call is not received for a predetermined time. There is an automatic connection service that performs the call and a call forwarding service to 'directly' transfer the incoming call to another registered phone number in advance.

In the case of such a call transfer service, since the exchange interworking should be performed in the order of the calling exchange, the called exchange, and the incoming number exchange, the called exchange does not directly relate to the call. There was a problem that system resource occupancy increased. In addition, since the call transfer number belongs to a mobile communication provider different from the first called subscriber number, there was a burden on the user side that a communication fee is charged for each carrier when a call transfer is made between wired and wireless carriers.

Accordingly, an object of the present invention is to solve the problem of excessive occupancy of the exchange system resources and the burden of user's fee.

The present invention for solving the above problems, the first exchange receiving the outgoing call including the phone number of the first called party subscriber from the calling party subscriber from the calling party exchange, and is responsible for the communication of the first called party subscriber Transmitting an outgoing call to the side exchange, checking, by the first called side exchange, that the first called party subscriber is currently unavailable, and confirming whether the first called party subscriber is a call forwarding service subscriber, and the first incoming call. If the subscriber is a subscriber of the transfer service and has registered a transfer telephone number, transmitting the transfer telephone number registered at the first called exchange to the calling exchange, and transferring the transferred telephone number transmitted from the calling exchange. Transmitting an outgoing call, including the outgoing call, to a second called party exchange in charge of communicating with a second called party subscriber corresponding to a call forwarding number; And a step of ventilating the performing communication by connecting to the second called party and the calling subscriber's side switching communication path.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 shows a sequence of providing a call transfer service according to the present invention. Call transfer service of the present invention, as shown in the figure, the calling party 1, the calling party switch 5, the first called party 11, the first called party 15, the second called party ( 21), and the second destination exchanger (25).

The first, second and second called party subscribers 1, 11 and 21 are users each equipped with a communication terminal. The communication terminal is a terminal capable of communicating voice or data by wire or wirelessly, and includes a mobile communication terminal such as a mobile phone and a PDA and a wired telephone. In addition, the first called party subscriber 11 is a subscriber using the call forwarding service according to the present invention, and has registered the telephone number of the second called party subscriber 21 in the first called party exchange 15.

The originating exchange 5 is an exchange in charge of the communication of the communication terminal of the originating subscriber 1. Further, the first destination side exchange 15 is a switch that is responsible for communication of the first destination side subscriber 11 and the second destination side exchange 25 is the second destination side subscriber 21. In addition, at least the first called party exchange 15 can provide a call transfer service to the first called party subscriber 11, and thus, a second called party corresponding to the telephone number of the first called party subscriber 11. It is preferable that the telephone number (transfer telephone number) of the side subscriber 21 is stored. The exchange may comprise an HLR or MSC / VLR in a mobile communication network and includes an exchange system in a wireline telephone network.

Therefore, at least the first called party exchange 15 has a database (not shown) of the communication service subscribers in charge, and stores a call transfer telephone number for performing the transfer service of the subscribers in a predetermined form. It is desirable to have. In addition, it is preferable that subscribers of the communication service use the Internet or contact the communication service provider to subscribe to the transfer service and register the telephone number for the transfer.

Hereinafter, the flow of signals in the call transfer service provided by the present invention will be described. First, the calling party 1 enters the telephone number of the first called party 11 into its communication terminal to transfer the call to the first called party 11 to the call to the calling party exchange 5. send. Calling party subscriber (S10). The originating exchange 5 sets the communication path to the first called exchange 15 which is in charge of the communication of the first called party 11 corresponding to the telephone number, and transmits a call to the first called party subscriber. Request call setup with (11) (S12). Receiving the call, the first called party exchanger 15 establishes a communication path with the first called party subscriber 11 of the telephone number (S14), and confirms whether the first called party subscriber 11 can communicate. do. At this time, when the first called party subscriber 11 is busy or is in a state in which communication is impossible due to no response due to weak signal, the first called party subscriber 11 is connected to the first called party subscriber 11 according to the present invention. Check whether the transfer service subscriber according to (S16, S18).

To check whether the subscriber is a subscriber of the transfer service, search the subscriber database provided in the first destination side exchange 15, and determine whether the first destination party 11 has registered a predetermined incoming phone number. Is performed by the determination. At this time, if it is determined that the incoming call number for the first called party subscriber 11 is not registered, the first called party subscriber 11 is determined to be a user who is not subscribed to the transfer service and the calling party exchange is determined. Notify that the call is not available to (5) (S20). Accordingly, the calling side exchange 5 notifies the calling party subscriber 1 of the call impossible state by a message such as sound or text (S22).

Further, if it is determined that the first called party subscriber 11 has registered the called phone number in the first called party exchange 15, the first called party exchange 15 sends the registered called phone number. The side exchange 5 transmits the message with the predetermined message indicating that the call is in a disabled state (S30). The calling exchange 5 determines the telephone number received with the message as the transfer telephone number, resets the call including the telephone number (S32), and is responsible for the communication of the transfer telephone number. 2 A request is made to establish a call path by retransmitting the first call to the called party exchange 25 (S34). Accordingly, the second called party exchanger 25 establishes a communication path with the second called party subscriber 21 corresponding to the call transfer phone number (S36), and transmits the call so that a call can be made (S38). ).

In a call transfer service having such a configuration and method, when the calling party exchange, which has transmitted the first call to the first called party exchange, receives a call forwarding telephone number from the first called party exchange, the first called party Without intervening the exchange, it is possible to establish a communication path to the transfer telephone number again and to carry out a call, thereby not occupying the resources of the first destination exchange system.

Accordingly, when the first destination exchange and the second destination exchange use a communication network different from each other, the calling party receives a call transferred to the second destination subscriber through the second destination exchange. When performing, it is not necessary to pay the communication fee for the first destination exchange of the first called party subscriber of the first call, but only pays the fee to the carrier of the second destination exchange.

The present invention including the configuration as described above, since it can provide the transfer service in the state that does not intervene the switch that is in charge of the called party subscriber of the first call in the state that the call is not available in providing the transfer service, It can solve the problem of over occupancy of system resources.

Claims (1)

a) the originating exchange receives an outgoing call containing the telephone number of the first called party subscriber from the calling party subscriber and transmits the outgoing signal to the first called party exchange responsible for communication of the first called party subscriber; Doing; b) checking, by the first called party exchange, that the first called party subscriber is currently incapable of calling and the first called party subscriber is a call transfer service subscriber; c) when the first called party subscriber is a call forwarding service subscriber and has registered a call forwarding phone number, transmitting the call forwarding phone number registered at the first called party exchange to the calling party exchange; d) transmitting, at the calling side exchange, an outgoing signal including the transferred call number to a second called side exchange in charge of communication with a second called party subscriber corresponding to the call transferring number; And e) the second called party exchange connecting a communication path between the second called party and the calling party exchange, so that the calling party performs communication with the second called party subscriber. How to provide service

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