JP2009060270A - Broadcast communication system of radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transmit a received emergency signal and to acquire emergency signals broadcast by all mobile stations in a communication area, without operator's judgment or operation on the part of an operator. <P>SOLUTION: A control station 2 of the radio communication system is provided with a receiving station 1 which receives 1 segment broadcast from a terrestrial digital broadcasting station. When the receiving station 1 receives the emergency signal of disaster information from the 1 segment broadcast, broadcasting of the disaster information to mobile stations 4, 5 is started by transmitting the emergency signal to the control station 2. As a result, the control station 2 makes a base station 4 at a base station communication mode into a base station standby state by transmitting a communication disconnection signal from the base station, and makes the mobile station 5 at a direct communication mode between the mobile stations into a base station standby state, by transmitting a broadcast call signal from a base station 3. After that, the control station 2 transmits the disaster information of the emergency signal from the base station 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a radio communication system that enables communication between mobile stations and communication between a base station and a mobile station, and in particular, receives a disaster emergency signal by one segment broadcast of digital terrestrial broadcasting, and the mobile station The present invention relates to a simultaneous communication system capable of reporting all at once.

  2. Description of the Related Art Conventionally, there is known a disaster prevention system in which disaster prevention information is transmitted using one-segment broadcasting of digital terrestrial broadcasting so that terminal devices carried by a user can be received all at once (see, for example, Patent Document 1).

  FIG. 3 is a diagram showing a main part of a conventional example of a wireless communication system in which disaster prevention information transmitted using one-segment broadcasting of terrestrial digital broadcasting can be communicated to mobile stations all at once.

  In the figure, a control station 100 in a wireless communication system is provided with a television receiver 101 that receives a one-segment broadcast of digital terrestrial broadcasting, and notifies disaster information to mobile stations (not shown) all at once. A control console 102 is provided.

When an emergency signal is broadcast as a one-segment broadcast from a public period such as a digital terrestrial broadcasting station, and the disaster information is displayed on the screen of a television receiver, the disaster prevention staff recognizes the disaster information on this screen and sets its priority. When it is determined that the mobile station should be notified urgently, the control console 102 is operated to disconnect the communication between the base station 200 and the mobile station in communication at the same time. The communication control channel is monitored, and then disaster information is transmitted from the base station 200 so that the mobile stations can simultaneously receive the disaster information.
JP 2006-279376 A

  By the way, in the conventional wireless communication system, a person in charge of disaster prevention intervenes, and the disaster information of the person in charge of disaster prevention is recognized and the priority is determined, and further, the operation for simultaneous communication of the disaster information to the mobile station is performed. This takes time, and delays in starting simultaneous communication to the mobile station after receiving a disaster notification, or misjudgment or misoperation by disaster prevention personnel. Disaster information may be missing.

  The present invention eliminates such problems, eliminates the operator's judgment and operation, transmits the received emergency signal, and enables all mobile stations in the communication area to simultaneously acquire the emergency signal. Is to provide a simultaneous communication system.

  In order to achieve the above object, the present invention is a wireless communication system that controls communication between a mobile station and a base station, and is provided with a receiving station that receives an emergency signal from the outside, and is received by the wireless station. The emergency signal is communicated to all the mobile stations at the same time.

  According to the present invention, it is possible to receive emergency signals all at once for mobile stations in any state, excluding artificial requirements such as operator's operation, and the emergency signals can be received quickly and accurately. Can be sent to the mobile station.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of a simultaneous communication system of a wireless communication system according to the present invention, where 1 is a receiving station, 2 is a control station, 3 is a base station, and 4 and 5 are mobile stations.

  In the figure, the control station 2 constitutes a radio communication system together with the mobile station, and the base station 3 enables communication between the mobile station and the base station 3 and communication between the two mobile stations. . Here, the mode in which the mobile station communicates with the base station 3 and the communication mode of the mobile station in which the mobile station communicates with other mobile stations via the base station 3 are referred to as base station communication modes. A communication mode for communicating with other mobile stations is referred to as an inter-mobile station direct communication mode. In the following, it is assumed that the mobile station 4 is in the base station communication mode and the mobile station 5 is in the inter-mobile station direct communication mode with other mobile stations (not shown). In addition, the mobile stations targeted in this embodiment are all the mobile stations existing in the communication area of the base station 3, but here, for convenience of explanation, the mobile stations 4 and 5 are the communication areas of the base station 3. The target mobile station.

  In this embodiment, the control station 2 is further provided with a receiving station 1 that receives an emergency signal by one-segment broadcasting from a facility for performing terrestrial digital broadcasting (not shown) (hereinafter referred to as terrestrial digital broadcasting station). The disaster prevention radio system that transmits emergency signals such as disaster information from the terrestrial digital broadcasting station to all the mobile stations in the communication area of the base station 3 by the control station 2 provided with the station 3 and the receiving station. Is done.

  That is, when an emergency signal composed of disaster information or the like is transmitted from a digital terrestrial broadcasting station (not shown), this is received by the receiving station 1. The control station 2 acquires the received emergency signal from the receiving station 1 and transmits the emergency signal from the base station 3 to all the mobile stations in the communication area, in this case, the mobile stations 4 and 5 at the same time. To do. Here, the emergency signal is in the form of a signal added to a code (emergency code) indicating that it is an emergency signal in the disaster information, for example. When the receiving station 1 receives this emergency code, the control station 2 Transmits a command signal from the base station 3 to place the mobile stations 4 and 5 in a standby state for receiving disaster information all at once, and then transmits the disaster information from the base station 3 and received by the mobile stations 4 and 5. Let In this case, the receiving station 1 is provided with a memory to store the received disaster information, which is repeatedly reproduced and sent to the control station 2 so that the same disaster information is repeatedly transmitted to these mobile stations 4 and 5. The mobile stations 4 and 5 may repeatedly notify the user of the disaster.

  FIG. 2 is a flowchart showing a specific example of an operation flow for simultaneous communication of emergency signals in this embodiment.

  In the figure, when the receiving station 1 receives an emergency signal composed of disaster information by one-segment broadcasting from a digital terrestrial broadcasting station (not shown) (step S1), the emergency signal is transmitted to the control station 2 by transmitting this emergency signal. Is simultaneously transmitted to each mobile station, the control station 2 starts simultaneous communication of disaster information (step S2). As a result, when receiving the emergency signal from the receiving station 1, the control station 2 sends a communication disconnection signal to the base station 3 (step S3), and a relatively long time (for example, 25 seconds) via the base station 3. ) A broadcast call signal is transmitted (step S4).

  Due to this communication disconnection signal, the mobile station 4 that is in the base station communication mode is disconnected from the base station 3 (step S5). The base station 3 is kept in a standby state for waiting for communication to be started from the base station 3 while maintaining a communicable state with the base station 3 (step S6). The same applies to other mobile stations that have been communicating with the mobile station 4 (in the base station communication mode).

  Further, the mobile station 5 in the state of direct communication mode between mobile stations communicates with other mobile stations without going through the base station 3 (step S7). The base station communication standby time enabling communication with the base station 3 is set for each predetermined period (step S8), and communication with other mobile stations is interrupted at this base station communication standby time. Then, the communication from the base station 3 is waited.

  Thus, in the mobile station 5 in the state of the direct communication mode between mobile stations, the state of directly communicating with other mobile stations and the base station communication standby state are repeated, but such a state is repeated. If a broadcast call signal is transmitted from the base station 3 for a relatively long time during this period, the mobile station 5 enters the base station communication standby state during the broadcast communication signal transmission period. A signal will be received. As described above, when the mobile station 5 receives the simultaneous communication call signal while in the base station communication standby state, the communication mode is switched (step S9), and the base station communication standby state continues as it is. .

  In this way, the mobile station 4 in the base station communication mode is in response to the communication disconnection signal, and the mobile station 5 in the mobile station direct communication mode is in accordance with the base station communication signal. The standby state is entered (steps S6 and S9). Thereafter, the control station 2 transmits disaster information as an emergency signal from the base station 3 (step S10). Thereby, the mobile stations 4 and 5 in the base station communication standby state can simultaneously receive the disaster information (steps S11 and S12).

  Here, in the control station 2, the communication disconnection signal and the broadcast communication call signal are stored in the memory, and when the emergency signal received from the receiving station 1 is supplied, for example, based on the code of the emergency signal These communication disconnection signals and simultaneous communication calling signals are called from the memory and supplied to the base station 3. Thereby, as described above, the base station 4 in the base station communication mode and the mobile station 5 in the inter-mobile station direct communication mode can communicate with each other regardless of the communication mode. The standby state can be set, and such simultaneous communication is also started without requiring any manual operation.

  Further, the control station 2 stores the emergency information of the emergency signal sent from the communication station 1 in a memory, repeatedly reads it and transmits it from the base station 3, and each mobile station 4 and 5 repeats this disaster information. It can also be made to receive.

1 is a block diagram showing an embodiment of a simultaneous communication system of a wireless communication system according to the present invention. 3 is a flowchart illustrating a specific example of a flow of processing for simultaneous communication of the wireless communication system illustrated in FIG. 1. It is a figure which shows the principal part of an example of the simultaneous communication system of the conventional radio | wireless communications system.

Explanation of symbols

1 Receiving station 2 Control station 3 Base station 4, 5 Mobile station

Claims (1)

In a wireless communication system that controls communication between a mobile station and a base station,
Establishing a receiving station to receive an emergency signal for one-segment broadcasting from outside,
A simultaneous communication system for a wireless communication system, characterized in that the emergency signal received by the wireless station is simultaneously transmitted to each mobile station.

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