JPH04319823A - Local disaster prevention radio mobile machine - Google Patents

Abstract

PURPOSE:To attain a local disaster prevention radio mobile machine which is used for a local disaster prevention radio system and transmits an alarm signal to a talking subscriber after detecting a catch signal for the control communication given to the partner group when the individual communication is carried out between the mobile stations of different groups. CONSTITUTION:A local disaster prevention radio mobile machine 1 is provided with a receiver 10, a base band amplifier 21 which amplifies the output of the receiver 10, a transmitter 30 which transmits the output of the amplifier 22 as a signal of a radio frequency, an antenna common use device 40, a self- station control communication decider 50 which decide the presence or absence of a catch signal for the control communication, and a control part 60 which performs the connection/channel switch control. Furthermore a counter station control communication decider 7O is added to the machine 1 which decides the presence or absence of the catch signal for the control communication given to a busy counter station together with an alarm output part 80 which outputs an alarm then the decider 7O detects the catch signal for the control communication.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile device used in a local disaster prevention radio system. In recent years, regional disaster prevention radio systems have been introduced to prevent the spread of disasters by promptly reporting disaster information to multiple related departments and responding promptly to disasters.

FIG. 3 is a diagram illustrating a regional disaster prevention radio system. The figure shows the configuration of a regional disaster prevention radio system 100. Until now, for example, the municipal disaster prevention radio system 101
, police radio system 102, fire radio system 103,
Each of the hospital wireless system 104, power wireless system 105, etc. was an independent wireless system, but it is now possible to integrate these into one wireless system for each region for efficient operation and disaster response. It is intended to be done quickly.

[0003] When mobile machines in different groups of the local disaster prevention radio system 100 are communicating individually, a control communication capture signal is sent to the other party's mobile machine, and when the communication is interrupted, it is difficult to understand why the communication is interrupted. It is required that the caller be informed of the situation.

0004

2. Description of the Related Art FIG. 4 is a diagram illustrating a conventional communication form. 1Ai in the figure is one of the mobile stations of group A, and 1B
j is one of the mobile stations of group B, and 1a is a control station. Here, group A accommodates mobile stations 1A1 to 1An, group B accommodates mobile stations 1B1 to 1Bm, and i
, j indicate the i and j-th mobile stations among them.

In (A), a mobile station 1Ai in group A and a mobile station 1Bj in group B, which is in a different group, use a communication channel (hereinafter referred to as S-
FIG. 3 is a diagram showing a state in which individual communication is performed using a channel (referred to as CH).

For example, mobile station 1Bj of group B is a calling station,
If mobile station 1Ai of group B is the called station, mobile station 1B of group B
By transmitting the group number and individual number of the mobile station 1Ai from j, it is possible to connect to any party in a different group and perform individual communication.

In (B), when the mobile station 1Ai of group A and the mobile station 1Bj of group B are performing individual communication using the S-CH (indicated by ■), the control station 1a sends a message to group A. FIG. 4 is a diagram showing a state in which a control communication capture signal is transmitted (indicated by ■) through a channel for control communication (hereinafter referred to as Ci-CH), and after capture, control communication begins.

FIG. 5 is a diagram illustrating a conventional local disaster prevention wireless mobile device, in which 1A is a local disaster prevention wireless mobile device;
21 and 22 are baseband amplifiers, 30 is a transmitter, 40 is an antenna duplexer, 50 is a local station control communication determiner, and 60 is a control unit.

[0009] Here, the local station controlled communication determiner 50 detects a capture signal of the controlled communication for the group to which the local station belongs, and when the captured signal is detected, the controlled communication starts.

0010

[Problems to be Solved by the Invention] In the above-mentioned conventional example, for example, the mobile station 1Ai of group A and the mobile station 1Bj of group B
If the control station 1a sends a capture signal for control communication to group A while the mobile station 1Ai is conducting individual communication, the mobile station 1Ai that was conducting individual communication uses the capture signal to is forcibly switched to the designated Ci-CH. Thereafter, control communication is performed with respect to the mobile stations of group A to which the mobile station 1Ai belongs.

[0011] On the other hand, the mobile station 1Bj of the group B, which has been conducting individual communication with the mobile station 1Ai of the group A, suddenly loses its communication partner. Moreover, since this is not a controlled communication for the own group, that is, group B, it is not possible to determine why communication with the mobile station 1Ai of group A, which is the other party of the call, has become impossible.

[0012] The present invention provides a regional disaster prevention radio system that can detect a capture signal of a control communication for the other party's group when mobile stations of different groups are making individual communications, and can send a warning signal to the caller. Trying to realize a mobile device.

[0013]

Means for Solving the Problems FIG. 1 is a block diagram illustrating the principle of the present invention. In the figure, 1 indicates a regional disaster prevention wireless mobile device, A is an antenna, 10 is a receiver that receives a radio frequency signal input from antenna A, converts it into a baseband signal and outputs it, and 21 is a receiver 10. 22 is a baseband amplifier that amplifies the baseband signal output from the receiver REC (not shown); 22 is a baseband amplifier that amplifies the baseband signal input from the microphone MIC (not shown); 30 40 is a transmitter that converts the baseband signal output from the baseband amplifier 22 into a radio frequency signal and outputs it to the antenna A, and 40 is an antenna duplexer that couples the receiver 10 and the transmitter 30 to the antenna A. 50 is a self-station control communication determiner that determines the presence or absence of a control communication capture signal for the own station; 60 is a self-station control communication determiner that monitors selection signals and control signals,
This is a control section 60 that performs channel switching control.

Reference numeral 70 denotes an opposite station control communication determiner provided in the local disaster prevention radio mobile device 1, which determines the presence or absence of a capture signal of a control communication for the opposite station during a call, and 80 an opposite station control communication determiner 70. is an alarm output unit that outputs an alarm when it detects a control communication capture signal, and when a control communication capture signal is sent to the opposing station while mobile devices in different groups are performing individual communication. , the opposite station controlled communication determiner 70 detects the capture signal of the controlled communication, and the alarm output unit 80 issues an alarm to notify the caller that controlled communication will be performed to the opposite station.

[0015]

[Operation] For example, mobile station 1Ai of group A and mobile station 1 of group B
When Bj performs individual communication, it is common to call the opposing station using a cell call method, and even in the called opposing station, it is possible to identify the group number and individual number of the caller.

Therefore, during a call, not only does the own station control communication determiner 50 monitor whether there is a captured signal of the control communication for the own station, but also the opposite station control communication determiner 70 monitors the presence or absence of the captured signal of the control communication for the opposite station. When the opposite station control communication determiner 70 detects a captured signal of the control communication for the opposite station, the alarm output unit 80 issues an alarm and the caller is instructed to perform the control communication for the opposite station. will be notified and put into standby mode.

[0017]

Embodiment FIG. 2 is a flowchart of an embodiment of the present invention. The operation will be explained using figures.

[0018] In order to monitor the presence or absence of a control communication capture signal during an individual call with the opposite station, a check is performed at regular intervals, for example, every 20 seconds. (2) The input radio frequency signal is converted into a baseband signal by the receiver 10 and inputted to the control unit 60, and the own station control communication determiner 50 detects the presence or absence of a control communication capture signal for the own station.

[0019] When a captured signal of control communication for the own station is detected, control communication operation is started. Controlled communication here means simultaneous communication including simultaneous notification, etc. between the control station 1a and the mobile stations. (Two-way communication is also possible.)■
When the captured signal of the controlled communication for the own station is not detected in step (2), the opposite station controlled communication determiner 70 then detects the presence or absence of the captured signal of the controlled communication for the opposing station.

[0020] If a capture signal for control communication to the opposite station is not detected, since no capture signal for control communication is sent to the own station or the opposite station, it is possible to continue the conversation as is.

[0021] When a control communication capture signal for the opposing station is detected in ■, an alarm is output from the alarm output unit 80 to notify the caller that a control communication capture signal for the opposing station has been sent. . Here, as an example, a buzzer is sounded.

[0022] Since a control communication capture signal has been sent to the opposing station, and it becomes impossible to talk to the opposing station with which you had been talking up until then, the call is completed and the call goes into standby mode. When a control communication capture signal is detected, a buzzer sounds as an example of an alarm output, but it can also be displayed on the display of the mobile station.

[0023]

[Effects of the Invention] According to the present invention, when mobile stations in different groups are performing individual communication, it is detected that a control communication capture signal is sent to the group to which the opposing station belongs. In some cases, it is possible to realize a regional disaster prevention wireless mobile device that can notify the caller at its own station that a control communication request has been made to the other station and return to the standby state.

[Brief explanation of drawings]

[Figure 1] Block diagram explaining the principle of the present invention

[Figure 2
] Flowchart of an embodiment of the present invention

[Figure 3] Diagram explaining the regional disaster prevention radio system

[Figure 4] Diagram explaining the conventional communication form

[Figure 5] Diagram illustrating a conventional local disaster prevention wireless mobile device

[Explanation of symbols]

1, 1A Local disaster prevention radio mobile device A Antenna 1Ai, 1Bj Mobile station
1a Control station 10 Receiver
21, 22 Baseband amplifier 30 Transmitter
40 Antenna duplexer 50 Local station control communication determiner 60
Control unit 70 Opposite station control communication determiner
80 Alarm output unit 100 Local disaster prevention radio system 101 Municipal disaster prevention radio system 102 Police radio system 10
3 Fire radio system 104 Hospital radio system 10
5 Power wireless system

Claims (1)

[Claims] 1. A mobile device used in a regional disaster prevention radio system, comprising a receiver (10) that receives a radio frequency signal input from an antenna (A), converts it into a baseband signal, and outputs it; A baseband amplifier (21) that amplifies the baseband signal output from the receiver (10) and outputs it to the receiver (REC), and a microphone (MIC).
a baseband amplifier (22) that amplifies a baseband signal input from the baseband amplifier (22); and a transmitter (22) that converts the baseband signal output from the baseband amplifier (22) into a radio frequency signal and outputs it to the antenna (A). 30), an antenna duplexer (40) that couples the receiver (10) and the transmitter (30) to the antenna (A), and determines the presence or absence of a captured signal of control communication for the own station. a self-station control communication determiner (50) that monitors the selection signal and the control signal;
A control unit (60) that controls connections and channel switching
A local disaster prevention radio mobile device (1) having a remote control communication device (1) includes an opposite station control communication determiner (70) that determines the presence or absence of a capture signal of a control communication for the opposite station during a call, and an opposite station control communication determiner (70).
) A local disaster prevention radio mobile device, characterized in that it is provided with an alarm output unit (80) that outputs an alarm when the control communication capture signal is detected.