JPH0548523A - Callback signal receiving method - Google Patents

Abstract

PURPOSE:To realize the callback signal receiving method in which the movement of a radio terminal equipment is taken into account by, informing the arrival of an incoming call to not only a base station having made communication but also to other base stations in the case of the reception of a callback signal. CONSTITUTION:In the radio communication system provided with plural base stations and a line controller, a caller base station being an object of callback and other base stations in a same calling area being objects of callback are registered in a fixed data section on the occurrence of the callback. When a callback with respect to a call whose channel is reserved takes place after the end of the call, the fixed data section is referenced to inform the arrival of the callback to not only the base station #j having taken part in the reserved call but also other base stations (e.g. plural base stations #a, #k adjacent to the station #j in the same calling area). Thus, even when the radio terminal equipment is moved from the area of the base station #j to the coverage of the base station #a, the callback is able to reach the terminal equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call back and call receiving method of a wireless communication system for carrying out call back and call after the call is finished, and more particularly to a call back and call receiving method suitable for improving service to a wireless terminal.

[0002]

2. Description of the Related Art Conventionally, for example, the 110/119 number is transmitted,
When the call ends and the wireless terminal disconnects first, the police / fire stand lacks the items to check, so when calling back to the disconnected terminal to communicate, the call back is received by the following method. It is carried out. That is, when there is a call origination request from the wireless terminal, the line control device determines whether or not the call requires channel hold after the end of the call, and if the call is a channel hold target call, it is used for the call after the end of the call. The stored base station and channel are stored, and the channel is put on hold. Then if a call is made,
The line control device reads the stored base station and channel, and makes an incoming call using the pending channel only to the base station having the pending channel.

[0003]

The above-mentioned conventional technique has a problem that when the wireless terminal moves out of the base station area in which the channel is reserved, it cannot call back and communicate. An object of the present invention is to improve such a problem by making an incoming call not only to the base station where the call was made in the case of a call back call but also to another base station, and It is an object of the present invention to provide a call back incoming call method suitable for realizing a call back incoming call in consideration of movement.

[0004]

In order to achieve the above object, the call back method of the present invention is to be recalled at the time of call back in a wireless communication system including a plurality of base stations and a line controller. If the calling base station and other base stations within the same calling area to be recalled together with it are registered in advance in the fixed data section, and after the call ends, a call back to the call holding the channel is performed, It is characterized in that the fixed data section is referred to and an incoming call is made to the base station used for the call as well as the adjacent base stations in the same calling area.

[0005]

In the present invention, the originating base station to be recalled,
And at the same time, another base station in the same calling area for receiving an incoming call is registered in advance in the fixed data section. As a result, in the case of a call back incoming call, it is possible to make an incoming call not only to the base station where the call was made, but also to a plurality of other base stations. Therefore, it is possible to realize a call back call assuming a case where the wireless terminal moves, and improve the service to the user of the wireless terminal.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is a configuration diagram of a wireless communication system according to an embodiment of the present invention, FIG. 3 is a layout diagram of base stations in the same calling area according to the embodiment of the present invention, and FIG. 4 is a fixed view according to the embodiment of the present invention. It is explanatory drawing of a data part. In FIG. 2, reference numeral 1 is a line control device, 2a, 2b, ... 2p are a plurality of base stations connected to the line control device 1, 3 is a wireless terminal that joins the wireless communication system, and 4 is a call back operation. It is a terminal that can be used. Further, the base stations 2a, 2b, ...
2p belong to the same calling area group and are installed as shown in FIG. Therefore, in the case of a normal incoming call, all base stations in this group are called. The line control device 1 also includes a switching control unit 5 for controlling the line connection, a service analysis unit 6 for translating a received dial number, a recording table 7 for accumulating information for a call back call, and a preset base station. It is composed of a fixed data section 8 for storing corresponding adjacent base station information and a channel management section 9. Here, as shown in FIG. 4, the fixed data unit 8 includes the base station (2b, 2) to be recalled together with the base station (2a) to be recalled.
j, 2k) data is set.

Next, the call-back / call-in operation with such a configuration will be described. FIG. 1 is a sequence diagram showing a call back incoming method according to an embodiment of the present invention. In this embodiment, the wireless terminal 3 uses the base station #j (2j shown in FIG. 2).
A series of signal sequences from the call origination to the terminal 4 via the call to the call back call reception will be described. First,
The telephone number is dialed from the wireless terminal 3 to the terminal 4 which may be called back by way of the base station 2j. The line control device 1 translates the received dial,
It is determined that the call is an object of the call back call and stored in the recording table 7. After that, when the wireless terminal 3 disconnects when the wireless terminal 3 and the terminal 4 terminate the call, the line control device 1 stores the number and the channel of the base station 2j used for the call in the recording table 7 and also the channel management unit. At 9, the channel is put on hold. Further, the fixed data unit 8 indicates that the recalled base station numbers #a and #k adjacent to the base station 2j used for the call (2a and 2 shown in FIG. 2).
b, 2i, 2h, 2l, 2k), and these base station numbers are also stored in the recording table 7. And terminal 4
When the call is called back, the base station 2j used for the call to be recalled and the adjacent base stations 2a, 2
Incoming calls are made to b, 2i, 2h, 2l and 2k. In this case, to the base station 2j used for the call, the channel held by the channel management unit 9 is designated to make an incoming call, and the other base stations 2a, 2b, 2i, 2h, 2l,
For 2k, an empty channel is designated and an incoming call is made. According to the present embodiment, the wireless terminal receives a call not only in the base station used for the call but also in the adjacent base station, so that the wireless terminal can communicate with the call base station area (for example, the base station 2j).
Even when the user moves from the other side, it is possible to respond from another base station area (for example, the base station 2a). Therefore, even if the wireless terminal 3 moves, a call back call can be provided, and the effectiveness of the wireless communication service can be enhanced.
In the present embodiment, an empty channel is designated for the base station adjacent to the base station used for the call, but since there is a possibility of channel busy at the time of call back, the effectiveness of the wireless communication service (wireless In order to further increase the reliability (response to terminal movement), the channel of the base station used for the call is held when the call is disconnected, and the channel of the base station adjacent to the channel is also reserved for this. It is also conceivable to store the channel in the recording table 7 at the time point and put the channel in the hold state by the channel management unit 9. Also, the base station number for the recall target is the base station adjacent to the base station used for the call, but for example, the range is expanded to the base station adjacent to the adjacent base station, etc. The selection of the base station number for the can be performed arbitrarily.

[0008]

According to the present invention, even when a wireless terminal moves, a call back call can be made, so that the effectiveness of the service can be enhanced and a highly practical wireless communication system can be provided. is there.

[0009]

[Brief description of drawings]

FIG. 1 is a sequence diagram showing a call back call receiving method according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a wireless communication system according to an embodiment of the present invention.

FIG. 3 is a layout diagram of base stations in the same calling area according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a fixed data part according to an embodiment of the present invention.

[Explanation of symbols]

 1 line control device 2a base station 2b base station 2j base station 2p base station 3 wireless terminal 4 terminal 5 exchange control unit 6 service analysis unit 7 recording table 8 fixed data unit 9 channel management unit 10 switch

Claims (1)

[Claims] 1. A plurality of base stations that perform control including setting of a wireless communication channel with a wireless terminal, and a line control device that performs control including setting of a communication channel with the plurality of base stations. In the communication control method of the configured wireless communication system, at the time of call back, an originating base station to be recalled,
When the call origination base station and another base station in the same calling base station group to be recalled are registered in advance, and after the call ends, a call back to the call holding the channel is performed,
A call back receiving method characterized in that an incoming call is made to a predetermined base station registered in advance together with the base station used for the call.