JPH084247B2 - Car phone system broadcast system - Google Patents

Description

The present invention relates to a broadcast system in a car telephone system.

(Prior Art) In the conventional car telephone exchange system, between the car telephone of the called party and the telephone set of the calling party (calling side), 1
I was able to connect only to one. Therefore, the other mobile phones in the same service area are individually called, and the expanded mobile phone responds and then conveys the contents.

(Problems to be Solved by the Invention) In order to convey the same contents to all the mobile telephones in the same service area, it is necessary to redial each subscriber after the end of each call.

In addition, when a car phone service and a broadcast service are required, it is necessary to separately install a broadcast-dedicated terminal and subscribe to another system that allows subscribers to broadcast broadcasts, which increases the cost. there were.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a broadcast system of a car telephone system capable of general calls and broadcasts with a simple configuration.

(Means for Solving Problems) Means provided by the present invention to solve the above problems and achieve the above object is to relay each call information of a plurality of calling mobile telephones by a wireless relay station. A car telephone system for individually exchanging with a car telephone exchange to talk to a corresponding incoming car telephone, including a broadcast request signal identifying means for identifying a broadcast request signal from the car telephone, and the broadcast request. Broadcast mode switching request signal transmitting means for transmitting a broadcast mode switching request signal to a corresponding mobile telephone based on a command from the signal identifying means is provided in the mobile telephone exchange, and the broadcast mode switching request signal is received for simultaneous broadcasting. And a broadcast request signal transmitting circuit for transmitting the broadcast request signal, wherein a broadcast radio channel assigning circuit for assigning the radio channel is provided in the wireless relay station, A broadcast mode switching request signal receiving circuit for receiving a broadcast mode switching request signal, a loudspeaker for amplifying broadcast contents, and a broadcast mode switching circuit for connecting the loudspeaker to the broadcast radio channel to set the broadcast mode. It is characterized in that it is provided in the plurality of car telephones.

(Example) Hereinafter, the Example of this invention is described with reference to drawings.

FIG. 1 is a block diagram showing an example of an automobile telephone according to the present invention, and FIG. 2 is a system configuration diagram of the present invention to which the embodiment of FIG. 1 is applied. The car phone 99 has a push-button (PB) phone 10 and a call current supply circuit 20, which are generally used for car phones. When the subscriber of the automobile telephone set 99 goes off-hook or on-hook, the calling / disconnection monitoring circuit 30 for monitoring calling and disconnection operates to send a calling request signal or a disconnection signal via the calling disconnection signal transmission circuit 40. And sends it to the modem 70. This call request signal or disconnection signal is sent to the automobile switchboard 140 through the transmitter 80. Further, when the receiver 90 receives a connection request signal for the car telephone 99 from the car telephone exchange 140, whether a broadcast mode switching request code is added to this connection request signal,
The broadcast switching request receiving circuit 75 discriminates whether or not. When the broadcast request signal is identified, the channel switching circuit 60 is operated by the command from the modulation / demodulation circuit 70 to switch to the broadcast wireless channel, and the switching contact of the broadcast mode switching circuit 50 is set to the loudspeaker.
Switch to the 55 side and set to broadcast mode.

Next, referring to FIG. 2, when the mobile phone 101a issues a call request to broadcast all, the wireless relay station 11a
Connected to the car telephone exchange 140 through 0. The automobile telephone exchange 140 identifies, by the central processing unit 160, that the particular code of the broadcast request of the automobile telephone subscriber has been received. The central processing unit 160 discriminates whether or not this mobile telephone subscriber is a broadcast-permitted mobile telephone subscriber by preliminarily registering in the storage device 170 in order to identify whether or not this mobile telephone subscriber is a broadcast-permitted mobile telephone subscriber. In that case, in order to record the broadcast content, the communication path switch 150 is connected to the broadcast recording device 190 and the broadcast content of the subscriber is recorded. After the end of recording, when the subscriber of the mobile phone 101a goes on-hook, the calling / disconnection monitoring circuit 30 of the mobile phone 99 identifies the on-hook,
The calling / disconnection signal sending circuit 40 is operated to send the disconnection signal to the automobile telephone exchange 140. The central processing unit 160 confirms the disconnection signal and identifies whether or not the disconnection (on-hook) car telephone subscriber cancels the broadcast request. If the broadcast request is not canceled, the central processing unit 160 reads out the registration list of the car telephone subscribers in the same service area from the storage device 170, and all the broadcasting permitted subscribers 101b, 101b in the car telephone subscribers register, A broadcast mode switching request code for connection is sent to 101c and 101d. Further, at this time, the central processing unit 160 instructs the broadcast wireless channel allocation circuit 130 via the communication path switch 150 and the wireless repeater 120 to set a broadcast mode for transmitting the connection request signal to which the broadcast wireless channel is added. To do. When the broadcast mode switching request signal transmitted from the broadcast radio channel allocation circuit 130 is identified by, for example, the broadcast switching request receiving circuit 75 of the mobile phone 101b in the same service area, the broadcast switching request receiving circuit 75 detects that the modulation / demodulation circuit 70 and the channel switching. The broadcast mode switching circuit 50 is operated via the circuit 60 so that the switching contact of the broadcast mode switching circuit 50 is switched to the loudspeaker 55.
Switch to. At this time, the channel switching circuit 60 is operated to switch from the call channel to the broadcast channel, and the broadcast mode in which the broadcast can be received is set.

Such a broadcast mode setting is performed on the mobile telephones 101c and 101d of other broadcast-allowed subscribers in the mobile telephone subscriber register in the same service area.

Since all the broadcasting-allowed subscribers 101a, 101b, 101c, 101d are assigned the same channel according to the instruction of the broadcasting radio channel allocating circuit 130, the broadcasting radio channel and the broadcasting recording device 190 are connected to each other, so Broadcast.

Note that 102, 103, 104 are general mobile phones that do not allow broadcast, and 101a, 101b, 101c, 101d are mobile phones that do allow broadcast. This car phone 101
Each of a, 101b, 101c and 101d is provided with the same circuit block as that of the embodiment of FIG.

(Effects of the Invention) As described above, according to the present invention, a general car phone service and a general broadcast service can be easily performed by the same car phone.

Further, it is not necessary to join two types of exchanges, and there is an effect that the operability of the caller and the reduction of equipment cost can be achieved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a specific example of an automobile telephone according to the present invention, and FIG. 2 is a system configuration diagram showing an example of the system of the present invention. 10 …… PB telephones, 101a-d …… Broadcasting permitted mobile telephones,
20 …… Call current supply circuit, 102-104 …… Car telephone,
30 …… Call disconnection monitoring circuit, 110 …… Wireless relay station, 40 ……
Call disconnection signal sending circuit, 120 ... Wireless repeater, 50 ... Broadcast mode switching circuit, 130 Broadcast radio channel allocation circuit, 55 ... Speaker, 140 ... Car telephone exchange, 60 ...
… Channel switching circuit, 150 …… Call path switch, 70 ……
Modulator / demodulator, 160 ... Central processing unit, 75 ... Broadcast switching request receiving circuit, 170 ... Storage device, 80 ... Transmitter, 180 ...
I / O device, 88 ... Car phone antenna, 190 ... Broadcast recording device, 90 ... Receiver, 99 ... Car phone.

Claims (2)

[Claims] 1. A car telephone system in which call information of a plurality of calling car telephones is relayed by a radio relay station and individually exchanged by a car telephone exchange to make a call with a corresponding call car telephone. A broadcast request signal identifying means for identifying the broadcast request signal, and a broadcast mode switching request signal transmitting means for transmitting a broadcast mode switching request signal to the corresponding car telephone based on a command from the broadcast request signal identifying means. A broadcast channel for transmitting the broadcast request signal, which is provided in the car telephone exchange, and which is provided with a broadcast radio channel allocation circuit for receiving the broadcast mode switching request signal and allocating a broadcast broadcast radio channel in the wireless relay station. A request signal transmitting circuit, a broadcast mode switching request signal receiving circuit for receiving the broadcast mode switching request signal, and an expansion unit for expanding the broadcast content. Device and, simultaneously broadcasting system of an automobile telephone system, wherein a broadcast mode switching circuit for setting the enlarged voice device to connect to the broadcast mode to the broadcast radio channels are provided in said plurality of automobile telephones. 2. A broadcast system for a car telephone system according to claim 1, wherein the broadcast radio channel for the broadcast is broadcast to the plurality of car telephones by the same radio channel. .