JP2003272073A - Multiple address radio system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of being kept waiting during that time due to being unable to report in the other area when making a report somewhere in one area when desiring to transmit the separate contents to multiple addresses, for example, in an area A and an area B because of transmission operation via a common base station in a system including a plurality of multiple address areas. <P>SOLUTION: For solving the problem, a remote controller is respectively directly connected to respective simple relay stations to independently allow reporting operation to one's own station inside slave station of the respective simple relay stations by the remote controller without passing through the base station. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcasting system for notifying residents of disaster-related information and the like from an administrative organization or the like in the event of a disaster. 2. Description of the Related Art The prior art will be described with reference to FIGS. 4 and 5. FIG. FIG. 4 is a system diagram showing the prior art. FIG. 5 is a time chart showing the operation of the conventional system. The master station is composed of a console 1 and a base station 2, and is mainly installed at a city hall. Each ward in the city (A ward, B here
Simple relay stations 3 and 7 are installed in each of the two wards, and slave stations 5 and 6 and slave stations 9 and 10 are installed in each ward. Further, remote controllers 4 and 8 are provided for each section, and are connected to the console 1 via a dedicated line or the like. The base station 2 and each of the simple relay stations 3 and 7 are connected by a radio line (frequency f1), and each of the simple relay stations 3 and 7 and each of the slave stations 5 and 7 are connected.
6, 9, and 10 are connected by a wireless line (frequency f2). Next, the operation of this system will be described with reference to FIGS. When a system operator in each district wants to broadcast to a slave station in his / her district, for example, the remote controller 4 in the district A calls the console 1. These include the identification number of the remote controller 4 that has made the call, the slave station number to be called (here, only the slave stations 5 and 6 belonging to the zone A), and the communication type (voice, fax, siren, etc.). ). A method of storing a plurality of patterns of voices and sirens in a slave station in advance and performing reproduction and loud speech in accordance with the received pattern code is conventionally known. In this case, the pattern code is also transmitted from the remote controller 4. The console 1 having received the calling signal activates the base station 2 and transmits the above-mentioned signals to the simple relay stations 3 and 7 by the radio frequency f1. Each of the simplified relay stations 3, 7 calls these signals to the slave stations 5, 6, 9 and 10 by the radio frequency f2. When the received slave station number matches the own station number, each slave station activates the sound amplifier, reproduces sound data corresponding to the pattern code, and issues a report. The remote controller 4 sends an end signal to the console 1 automatically or manually after a predetermined notification is made. The console 1 includes the base station 2, the simple relay stations 3 and 7 as in the case of the above-mentioned calling.
Is started, and an end signal is transmitted to each slave station. Each slave station receiving the end signal returns to the standby state. Remote control 4
During the notification from, the console 1 sends the message to the other remote controller 7
Send a "busy" signal to signal that the system is busy. While receiving this signal, the remote controller 7 cannot perform a calling operation. The remote controller 7 can make a call request to the console 1 after the "busy" signal is no longer received, that is, after the report from the remote controller 4 is completed. During the notification from the remote controller 7, the notification from the remote controller 4 becomes impossible. [0003] In a system including a plurality of broadcast areas as described above, since the transmission operation is performed via a common base station 2, separate operations are performed in the A and B wards. If you want to broadcast the contents, if you report in one ward, you will not be able to report in other wards, and you will have to wait while doing so. The present invention is to solve this problem. [0004] The present invention has the following arrangement to solve the above-mentioned problems. The remote controller in each zone is directly connected to the simple relay station in each zone to make and terminate calls in each zone. In addition, a synchronization signal is periodically transmitted from the master station base station. The simple relay stations in each section are programmed so that the timing of transmission to the slave station does not overlap with that of other simple relay stations, and perform transmission operations to the slave stations at their respective timings based on synchronization signals from the master station. Here, if the single transmission time from the simple relay station to the slave station is set to several ms to several hundred ms, even if the remote controllers in a plurality of sections start the calling operation at the same time, each of the simple relay stations is almost equal. At the same time, transmission to the slave station can be performed. An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIGS. FIG. 1 is a system diagram showing an embodiment of the present invention. FIG. 2 is a time chart showing the operation of the present invention. FIG. 3 shows the transmission timing relationship between the first frequency f1 between the base station 2 and the simple relay stations 3 and 7 and the second frequency f2 between the simple relay stations 3 and 7 and the slave stations 5, 6, 9 and 10. This is shown in the time chart. Here, the case where the number of simple relay stations is two will be described. As shown in FIG. 3, the base station 2 of the master station is
And 7 are transmitted periodically. The f2 transmission timing from the simple relay station 3 in section A is the synchronization signal timing t0 + tA, and the f2 transmission timing from the simple relay station 7 in section B is f2.
The transmission timing is the synchronization signal timing t0 + tB,
Each simple relay station is programmed such that the f2 transmission timings for its own station and the multi-stations do not overlap each other. Next, the overall operation will be described with reference to FIGS. Now, it is assumed that the remote controllers 4 and 7 simultaneously perform the calling operation. Each of the remote controllers 4 and 8 sends a call signal (own number, own number) to the simple relay stations 3 and 7 in the own area.
The sub-station number to be called, the communication type, the acoustic pattern code to be reproduced, etc.) are transmitted. Each of the simple relay stations 3 and 7 that has received the paging signal transmits these signals to the slave stations at respective timings with a time width of several ms to several hundred ms. The slave station identifies the received signal, reproduces the stored sound data, and outputs the sound data from the speaker. As shown in FIG. 2, the paging signal from the simple relay station in each section is transmitted in a short time, so that the slave stations in each section start sounding almost simultaneously. After a predetermined notification is made, each remote controller automatically or manually sends a termination signal to the simple relay station. This call termination signal is also transmitted to the slave stations in each section at the same timing as the call signal, and the call termination operation is completed. From the above description, according to the present invention, in a broadcast radio system including a plurality of simple relay stations, different contents of a report are simultaneously sent to slave stations belonging to each relay station. Since it is possible to do so, it is possible to make a unique report in each ward or each town at a unique timing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system diagram showing a configuration example of a broadcast radio system according to an embodiment of the present invention. FIG. 2 is a diagram showing an operation of the broadcast radio system according to an embodiment of the present invention. FIG. 3 is a time chart showing transmission timings of a first frequency f1 and a second frequency f2 of a broadcast radio system according to an embodiment of the present invention. FIG. 4 is a broadcast radio representing a conventional embodiment. FIG. 5 is a system diagram showing a configuration example of the system. FIG. 5 is a time chart showing the operation of a broadcast radio system representing a conventional embodiment. [Description of symbols] 1: console, 2: base station, 3, 7: simple Relay station,
4, 8: remote controller, 5, 6, 9, 10: slave station

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Claims (1)

Claims: 1. An operation console, a plurality of simple relay stations controlled by the operation console, and a base station for transmitting and receiving at a first frequency; and the simple relay station and a second base station. In a broadcast radio system including a plurality of slave stations in each simple relay station section that performs transmission and reception by frequency, each of the simple relay stations in each section has a remote controller, and the remote controller in each section includes Wherein the broadcast is transmitted to the slave station in the simple relay station section at a second frequency at each independent transmission timing through the simple relay station under the control of (1).