JPH0326196A - System for transferring incoming in subscriber radiocommunication system - Google Patents

Abstract

PURPOSE:To eliminate a meaningless call when a terminal housed in a slave station is absence by immediately executing a connection through a third subscriber's line to a transfer destination based on stored transfer destination information at the time of a call to the terminal to which a transfer request is executed. CONSTITUTION:The present system is equipped with a base station 10 connected through first subscriber's lines #1-#n to a general subscribed telephone network, slave stations 1001-100n connected through a radio transmission line to the base station and terminals 2001-200m connected through second subscribers lines to the slave stations, and the first subscriber's lines, second subscriber's lines and terminals correspond one to one, respectively. Further, between the general subscribed telephone network and base station, third subscriber's lines #n+1 #n+e to be commonly used by respective terminals are connected. By the base station, when an incoming transfer request is executed from the terminal through the slave station to the base station, it is managed, the transfer destination information is stored in a storage circuit 60, and when the incoming to the terminal, to which the incoming transfer request is executed, is generated, a transfer opponent destination is called through the third subscriber's lines according to the stored transfer destination information, and the first and third subscriber's lines are connected.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention connects a general subscriber telephone network and a base station via a plurality of subscriber lines, and also connects a base station and a plurality of slave stations by concentrating wireless communication. This paper relates to a call transfer method in a subscriber wireless communication system that is connected via a transmission path and has a one-to-one correspondence between a subscriber line and a terminal connected to a slave station. [Prior Art] Conventionally, geographical access from the general subscriber telephone network. As a means of accommodating subscriber terminal devices such as telephones that are geographically distant from each other in a general subscriber telephone network, a base station connected to the general subscriber telephone network via a plurality of subscriber lines is provided, and this base station A subscriber wireless communication system is used in which a subscriber line and a plurality of slave stations are connected via a condensed wireless transmission path, and a subscriber line and a terminal such as a telephone connected to the slave stations are in one-to-one correspondence.

In this type of communication system, incoming calls from the general subscriber telephone network to a terminal connected to a slave station are sent from the general subscriber telephone network's exchange in the form of a ringing signal to the base station via the subscriber line. The base station detects this paging signal, and if there is an empty communication channel on the wireless transmission path between the base station and the slave station, it allocates a communication channel.
An incoming call connection is made by making an incoming call to the slave station terminal via this call channel. [Problem to be solved by the invention] In the conventional communication system described above, the base station
Since incoming calls to the terminal of the slave station are made via an empty communication channel that exists on the wireless transmission path between the base station and the slave station, the subscriber is away from the terminal for a long time and there is no possibility of a response from the terminal. Even when the caller is in a hurry, the caller monopolizes the call channel and continues calling until the caller abandons the call. Therefore, during this time, the call channel is monopolized and other calls are restricted, resulting in a problem that the effective use of the call channel is impaired. The purpose of the present invention is to provide a call transfer method that eliminates the exclusive use of communication channels associated with such calls and makes effective use of them. [Means for Solving the Problems] The incoming call transfer system of the present invention includes a base station connected to a general subscriber telephone network via a plurality of first subscriber lines, and a base station connected to the general subscriber telephone network via a wireless transmission path. A slave station to be connected, and l or more terminals connected to the slave station via a second subscriber line, wherein the first subscriber line, the second subscriber line and the terminals are each In a subscriber wireless communication system with one-to-one correspondence, a third subscriber line that can be commonly used by each terminal is connected between the general subscriber telephone network and the base station. The base station also has a means for managing the call transfer request information and storing the transfer destination information when a call transfer request is made from a terminal to the base station via a slave station, and a means for managing the call transfer request information and storing the transfer destination information. means for calling a transfer destination via a third subscriber line in accordance with stored transfer destination information when an incoming call occurs to a terminal that has been transferred; and connecting these first and third subscriber lines. and the means to do so.

[Effect]

In this structure, when a call is made to a terminal for which a transfer request has been made, the connection to the transfer destination is immediately made via the third subscriber line based on the stored transfer destination information, so there is no wasted time for an absent terminal. This eliminates unnecessary calls and eliminates monopolization of call channels during those calls. [Example] Next, the present invention will be explained with reference to the drawings. FIG. 1 is a structural diagram showing an embodiment of a subscriber wireless communication system to which the present invention is applied. In the figure, 1 is an exchange for the general subscriber telephone network, and is connected to the base station IO of the subscriber wireless communication system via subscriber lines #1 to #n assigned telephone numbers of the general subscriber telephone network. This base station 10 includes a subscriber line interface circuit 2.
0, communication path switch 30, radio interface circuit 40, radio transceiver 50, memory circuit 60, main control section 70
, and a common subscriber line interface circuit 80. That is, the subscriber line interface circuit 20. ~20,,
(n is a positive integer) interfaces the subscriber line from the exchange 1 and outputs call connection information such as outgoing/incoming calls and call termination via the data path. The communication path switch 30 connects the subscriber line interface circuit 20 . ~20. n signals are switched and connected to m communication channels (m is an integer of man) on the transmission path between the base station and the slave station. The radio interface circuit 40 interfaces with the radio transceiver 50 and inputs and outputs call connection information such as call origination and call termination information from the slave station via a data path. The storage circuit 60 stores the transfer destination to the general subscriber telephone network desired by the subscriber on the slave station side for an incoming call from the general subscriber telephone network to the slave station. The main control unit 70 performs management control of the entire subscriber wireless communication system, such as allocation control of communication channels of wireless transmission paths. Also, common subscriber line interface circuit 801~sot (!. is a positive integer)
is common subscriber line #(n+1) used for call transfer, etc.
~(n+1!.) to the exchange 1 to perform call connection such as incoming call transfer.

The base station 10 includes slave stations 1001 to 100k.
(k is a positive integer) are connected via a wireless transmission path. These slave stations include terminal devices 2001 to 10, respectively.
0, is accommodated via the subscriber line. Next, the operation of call transfer in the subscriber wireless communication system shown in FIG. 1 will be explained.

First, when the terminal 2001 requests transfer of an incoming call to its own station, the terminal 2001 requests the base station 10 to transfer the incoming call via the slave station 100. As a result, the general subscriber telephone network transfer destination number, which is the transfer destination, is stored in the storage circuit 60.

In this state, if a subscriber of the general telephone network
When making an incoming call to 200, the telephone number of terminal 200 is dialed. The exchange 11 that receives this instruction to call the terminal 2001 sends a ringing signal to the subscriber line #1 corresponding to the terminal 2001.

Subscriber line interface circuit 2 of base station 10 receives this ringer call from exchange 1 via subscriber line #1.
0. Then, the main control unit 70 is notified of the occurrence of an incoming call via the data path. The main control unit 70 that received the notification sends the terminal 20
0. It is checked whether there is a call transfer request from li!, and if there is a request, it is determined that the general subscriber telephone network transfer destination number is stored in the storage circuit 60. After checking, check whether the common subscriber line is empty or not. Empty common subscriber line (e.g. #n+
1), the main controller 70 connects the common subscriber line interface circuit 80 . to the transfer destination number stored in the storage circuit 60, and at the same time, the call path switch 30 sends a call to the subscriber line interface circuit 20.
Connect between. The common subscriber line interface circuit 80 receives the call instruction. makes a call to the general subscriber telephone network with the forwarding destination number, and the main control unit 70 sends a call to the subscriber line interface circuit 20 via the data path.
Answering a ringer call (off-hook on the phone)
and the subscriber line interface circuit 20 that received the instruction. Then, by responding to the ringer call, it becomes possible to talk between the caller and the subscriber at the transfer destination terminal 200. Therefore, if the terminal requests the transfer in advance,
No unnecessary calls are made to this terminal, monopolization of the communication channel for this purpose is avoided, and communication by other terminals is not restricted, and the communication channel can be used effectively.

〔Effect of the invention〕

As explained above, when a call is made to a terminal for which a transfer request has been made, the present invention immediately connects to the transfer destination via the third subscriber line based on the stored transfer destination information. This has the effect of eliminating meaningless calls when a terminal housed in a station is absent, and making effective use of communication channels.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of a subscriber wireless communication system according to the present invention. 1... General subscriber telephone network exchange, 10... Base station, 2
0. ~20, . . . subscriber line interface circuit, 3
0...Call path switch, 40,~40. . . . Radio interface circuit, 50 . . . Radio transceiver, 60
. . . Memory circuit, 70 . . . Main control unit, 80, to 80.
... common subscriber line interface circuit, 100, ~
100. ...Slave station, 2001-200,%...terminal.

Claims (1)

[Claims] 1. A base station connected to the general subscriber telephone network via a plurality of first subscriber lines, a slave station connected to the base station via a wireless transmission path, and a second subscriber station to the base station. one or more terminals connected via a subscriber line, the first subscriber line and the second subscriber line
In a subscriber wireless communication system consisting of subscriber lines and terminals in one-to-one correspondence, a third subscriber line that can be commonly used by each terminal is connected between the general subscriber telephone network and the base station, and The base station includes means for managing call transfer request information and storing transfer destination information when a call transfer request is made from a terminal to the base station via a slave station, and a means for managing the call transfer request information and storing the transfer destination information, means for calling a transfer destination via the third subscriber line in accordance with the stored transfer destination information when an incoming call to the terminal is received; 1. An incoming call transfer method in a subscriber wireless communication system, comprising: means for connecting.