JPH03198497A - Car telephone subscriber calling system - Google Patents

Abstract

PURPOSE:To prevent the impact of a use rate form being generated to a radio access control channel by making a service tone or announcement showing absence to a caller without transmitting a call signal to the radio call control channel even when an incoming call is generated to a car telephone subscriber under registration. CONSTITUTION:When the car telephone subscriber is separated from a car and absent in the car, an absence signal is transmitted to a car telephone exchange 16 in advance so that absent subscriber data 19 can be registered to a memory device 20 in the car telephone exchange 16 and controlled. Therefore, even when the incoming call is generated to the absent car telephone subscriber, the call signal is not transmitted to the radio call control channel but the service tone or announcement can be made to the caller so as to show the absence. Thus, the radio call control channel can efficiently be used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile phone communication system, and more particularly to a wireless calling system for a mobile phone subscriber when an incoming call occurs.

[Conventional technology]

Conventionally, this type of car phone subscriber calling system transmits a ringing signal when an incoming call occurs to the car phone subscriber, even if the subscriber is not present, and indicates whether the car phone has answered or not. The method was to be confirmed by the car telephone exchange.

[Problem to be solved by the invention]

The above-mentioned conventional car phone subscriber calling system always sends a calling signal to the wireless call control channel every time an incoming call occurs, even though there is a high probability that the car phone subscriber is away. (radio paging) has a greater impact on control channel utilization. Furthermore, since a response signal to this paging signal is naturally generated, there is a drawback that the usage rate on the radio access control channel (upper channel) is affected.

[Rounding method to solve the problem]

The car telephone subscriber calling system according to the present invention is a means for automatically sending an absence signal from the car phone to the car telephone exchange by turning off the power when the subscriber leaves the car and is away from the car. and a means for receiving the absent signal and registering the absent subscriber data in a memory device in the mobile telephone exchange; A means for transmitting a service tone or announcement to the caller indicating the caller's absence without transmitting the caller, and a means for automatically transmitting a cine presence cancellation signal from the car telephone to the car telephone exchange when the subscriber returns to the car and turns on the power. and means for canceling the absent subscriber data.

[Effect]

According to the present invention, even if an incoming call occurs to a car phone subscriber who has registered his/her absence, a calling signal is not sent to the radio call control channel, and a service tone or announcement indicating the caller's absence can be played.

〔Example〕

The figure is a block diagram showing an embodiment of a car telephone subscriber calling system according to the present invention. In the figure, 1 is an antenna 2. Wireless transmitter 3. Wireless receiver 4. Telephone interface circuit 5. f) A car phone consisting of a handset 6 and a control circuit 7 for controlling these device circuits, and driven by a power supply circuit 8 and a storage battery 9 as a stain source, 10 a radio wave, 11 an antenna 12. Control access channel radio circuit 13. Radio base station equipment 16 is composed of a control paging channel radio circuit 14° and a plurality of voice channel radio circuits 15a to 15n, and is wirelessly connected to the car telephone 1 via radio waves 10, and 16 is a switch circuit 17. Central processing unit 18. Memory device 2 for storing absentee subscriber data 19
0. A car telephone exchange consisting of a signal receiving circuit 21, a signal transmitting circuit 22, and a service sound transmitting circuit 23, these device circuits being connected by a signal bus circuit 24, 25 a telephone communication network, 26 a general telephone subscriber terminal, 27 28 is a subscriber absence request signal, 28 is a subscriber absence cancellation signal, and 29 is a subscriber calling signal.

The purpose of the storage battery 9 is to drive the mobile phone 1 in order to transmit the subscriber absence request signal 27 even after the power supply circuit 8 is turned off.

Next, the operation of the car telephone subscriber calling system with the above configuration will be explained. First, the car telephone 1 is connected to a car telephone exchange 16 via a radio base station equipment 11 using radio waves 10, and further connected to a general telephone subscriber terminal 26 via a telephone communication network 25. In addition, the memory device 2
0 is stored in absent subscriber data 19, which absent subscriber data information is controlled by subscriber absent request signal 2T and subscriber absent cancel signal 28.

Then, when the car phone subscriber leaves the car and is absent, the power supply circuit 8 is turned off. Therefore, the control circuit T
detects the disconnection of the power supply circuit 8 and transmits a subscriber absence request signal 2T from the antenna 2 via the radio transmitter 3 to the radio base station equipment 11 on the radio wave 10. The radio wave 10 carrying this subscriber absence request signal 2T is received by the antenna 12 of the radio base station equipment 11, and then transmitted via the control accelerator channel radio circuit 13 to the signal receiving circuit 21 of the mobile telephone exchange 16. bus circuit 24
- sent to central processing unit 18; This central processing unit 18
analyzes the subscriber absence request signal 2T sent from the car telephone 1 and registers the absence information in the absent subscriber data 19 in the memory device 20 together with the car telephone subscriber number.

Then, when an incoming call occurs from another car phone or general telephone subscriber terminal 26 to the absent registered subscriber, the car telephone exchange 16 checks the absent subscriber data 19 in the memory device 20. , when the subscriber is absent, sends the subscriber paging signal 29 from the signal transmitting circuit 22 to the control paging channel radio circuit 14 via the switch circuit IT, and stops transmitting the radio waves 10 from the antenna 12, while transmitting the radio wave 10 via the switch 17. The service tone oscillation circuit 23 and the telephone communication network 25 are connected to notify the calling subscriber 25 of the absence. Therefore, when the originating subscriber is the car telephone 1, the voice channel radio circuit 15a and the service tone transmitting circuit 23 can be connected via the switch circuit 17 to notify the situation of the subscriber's absence. By the above-described operation, it is possible to reduce the number of subscriber calling signals 29 to the mobile phone 1 when the subscriber is not present. Then, when the car phone subscriber simply returns, by turning on the power supply circuit 8, the control circuit T detects the power on signal and transmits the subscriber absence cancellation signal 28 to the radio transmitter 3 to the cyanogen 2'. t-
Send via. This subscriber absence cancellation signal 28 is received by the signal receiving circuit 21 via the antenna 12 of the radio base station equipment 11 - the control access channel radio circuit 13 - the switch circuit 17 of the car telephone exchange 16, and then sent to the signal bus circuit 24. The signal is sent to the central processing circuit 18 via the central processing circuit 18.

This central processing circuit 18 cancels the absence display of the mobile phone 1 registered in the absent subscriber data 19 in the memory device 20. Therefore, from now on, when an incoming call occurs from another subscriber, the central processing circuit 18 outputs a request for transmitting a subscriber paging signal 29 to the signal transmitting circuit 22. Therefore, when the signal transmission circuit 22 outputs a subscriber paging signal 29, this subscriber paging signal 29 is transmitted as a radio wave 10 via the switch circuit 17 - the control paging channel radio circuit 14 of the radio base station equipment 11 - the antenna 11. Sent out. Then, the mobile phone 1 receives this subscriber calling signal 29 via the antenna 2 with the wireless receiver 4 and outputs it to the control circuit γ.
drives the telephone interface circuit 5. For this reason,
The subscriber's handset 6 has a radio transmitter 3-antenna 2.
- Voice channel radio circuit 15n of radio base equipment 11 - Switch circuit 1T of car telephone exchange 16 - Telephone communication network 2
5 to connect to the general telephone subscriber terminal 26.

〔Effect of the invention〕

As explained in detail above, according to the car phone subscriber calling system according to the present invention, when the car phone subscriber leaves the car and is absent, an absence signal is sent to the car phone exchange in advance, and the car phone exchange By registering and managing absent subscriber data in the memory device of the mobile phone, even if an incoming call occurs to an absent car phone subscriber,
By not transmitting a paging signal to the radio paging control channel, there is an effect that the radio paging control channel can be used efficiently.

[Brief explanation of drawings]

1- is a block diagram showing an embodiment of a car telephone subscriber calling system according to the present invention. 1...Car phone, 2...Antenna, 3...
...Radio transmitter, 4...Radio receiver, 5...Telephone interface circuit, 6...Handset, 7
・Φ・・Control circuit, 8・・Power supply circuit, 9・・Storage battery, 10・・Radio radio waves, 11・・Radio base station equipment, 12・・・Antenna, 13・・・- Control access channel radio circuit, 14... Control call channel radio circuit, 15a to 15n... Voice channel radio circuit, 16... Car telephone exchange, 1T... Switch circuit, 18. ...Central processing unit, 19-@...
absent subscriber data, 20... memory device, 21...
・・Signal receiving circuit, 22・・・Signal transmitting circuit, 23・
...Service sound oscillation circuit, 24...e signal bus circuit, 25...telephone communication network, 26-...general telephone subscriber terminal, 2Tφ...subscriber absence request signal, 28
・Fist: Subscriber absence cancellation signal, 29: Subscriber calling signal.

Claims (1)

[Claims] In a car telephone system, when a car phone subscriber leaves his/her car and is absent, the subscriber's absence signal is sent to the car telephone exchange in advance and the absent subscriber data is registered in the memory device within the car telephone exchange. A car phone subscriber calling system characterized in that even when an incoming call occurs to a car phone subscriber, a calling signal is not sent to a radio call control channel, and a service tone or announcement indicating the caller's absence is played.