JP2006287771A - Information transmission system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information transmission system in which a disaster prevention radio system and a cellular phone system are fused. <P>SOLUTION: The information transmission system is constituted so that it consists of the disaster prevention radio system and the cellular phone system coupled to the disaster prevention radio system, the disaster prevention radio system consists of a central processor having a storage part, a radio which transmits a transmitted signal from the central processor, a plurality of relay stations which receive the transmitted signal from the radio and a plurality of radio information terminals which receive the transmitted signal from the plurality of relay stations, the storage part of the central processor stores a data table in which the plurality of relay stations and a plurality of cellular phone base stations having IP addresses are registered by every preliminarily determined area and the central processor transmits urgent disaster prevention information to the plurality of relay stations and the plurality of cellular phone base stations based on the data table in case of occurrence of a disaster. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information transmission system, and more particularly to an information transmission system in which a municipal disaster prevention digital communication system and a portable wireless system are integrated.

  As an information transmission method in a conventional information transmission system, for example, a municipal disaster prevention digital communication system is well known. This digital communication system for municipal disaster prevention uses voice messages between a master station (or base station) and an outdoor slave station or a door-to-door receiver. These are transmission methods, and these are only information transmission methods within a dedicated system called a municipal disaster prevention digital communication system, for example, emergency information.

  In addition to the above-described municipal disaster prevention digital communication system, there is an administrative public information system (for example, see Patent Document 1). This will be described with reference to FIG. In FIG. 7, 701 is a character display sending device, 702 is a console, 703 is a radio, 704 is a receiver of an outdoor loudspeaker, 705 is a character display equipped in the outdoor loudspeaker, and 706 is For example, a door-to-door receiver 707 installed in each home is a character display provided in the door-to-door receiver.

  The character display transmission device 701, the console 702, and the wireless device 703 are installed in a building of an administrative authority such as a city hall or a town / village office, and constitute a master station device (also referred to as a base station). The receiver 704 and the character display 705 are installed outdoors in the administrative area to constitute a slave station device, and the individual receiver 706 and the character display 707 are installed in a facility or house in the administrative area. A station apparatus is configured.

  Furthermore, a function for exchanging e-mails via the Internet 709 and information terminal devices 708-1 and 708-2 such as a personal computer and a cellular phone with a mail function is added to the character display transmission device 701. The character display transmission device 701 has a function of transmitting and receiving e-mails via the Internet 709.

  However, in the conventional information transmission system described above, even in the area where the disaster occurred, the person who is in a place where the broadcasted sound does not reach or is difficult to reach, for example, a vehicle such as a train, a bus, an automobile, etc. It is difficult to transmit emergency information to a person who is on board or a person who is in a place without an information terminal device of a municipal disaster prevention digital communication system. In addition, there may be cases where the voice message from the outdoor loudspeaker is missed, the report is not recorded, or the sound is drowned out by heavy rain and is not transmitted to the local residents. Therefore, it is desired to realize an information transmission system that solves such a problem that urgent information is not transmitted.

JP 2004-297242 A

  In the conventional information transmission system described above, emergency information is transmitted to people who are not or will not be able to reach the broadcasted audio, or who are not in the area where there is no information terminal device of the municipal disaster prevention digital communication system. Difficult to do. In addition, there may be cases where the voice message from the outdoor loudspeaker is missed, the report is not recorded, or the sound is drowned out by heavy rain and is not transmitted to the local residents.

  The objective of this invention is providing the information transmission system which united the disaster prevention radio | wireless system and the mobile telephone system.

  Another object of the present invention is to provide an information transmission system capable of transmitting emergency information to a person in a place where broadcast audio is difficult to reach.

  Yet another object of the present invention is to provide an information transmission system capable of transmitting emergency information to a moving person or a moving audio-visual handicapped person.

  An information transmission system according to the present invention includes a disaster prevention radio system and a mobile phone system coupled to the disaster prevention radio system. The disaster prevention radio system receives a central processing unit having a storage unit and a transmission signal from the central processing unit. The mobile phone system comprises: a radio that transmits, a plurality of relay stations that receive the transmission signals from the radio, and a plurality of wireless information terminal devices that receive the transmission signals from the relay stations. A switching station coupled to the central processing unit, a plurality of mobile phone base stations having IP addresses, and a plurality of base stations for appropriately switching and connecting the transmission signals from the switching center to the plurality of mobile phone base stations It comprises a control device and a plurality of portable information terminal devices that receive the transmission signals from the plurality of mobile phone base stations, and the storage unit of the central processing unit is determined in advance. A data table in which the plurality of relay stations and the plurality of mobile phone base stations having the IP address are registered for each area is stored, and the central processing unit stores emergency disaster prevention information based on the data table when a disaster occurs. It is configured to transmit to the plurality of relay stations and the plurality of mobile phone base stations.

  Further, in the information transmission system of the present invention, the plurality of base station control devices or the plurality of mobile phone base stations are positions of the plurality of mobile information terminal devices located within a communication area of the plurality of mobile phone base stations. It has a data table in which information is registered, and is configured to report the emergency disaster prevention information to the plurality of portable information terminal devices based on the data table in which the location information of the plurality of portable information terminal devices is registered when a disaster occurs Is done.

  The information transmission system of the present invention includes a disaster prevention radio system and a mobile phone system coupled to the disaster prevention radio system. The disaster prevention radio system includes a central processing unit having a storage unit and the central processing unit. A wireless device that transmits a transmission signal; a plurality of relay stations that receive the transmission signal from the wireless device; and a plurality of wireless information terminal devices that receive the transmission signals from the plurality of relay stations. The telephone system includes a switching center coupled to the central processing unit, a plurality of mobile phone base stations, and a plurality of base station controls for appropriately switching and connecting the transmission signal from the switching center to the plurality of mobile phone base stations. And a plurality of portable information terminal devices that receive the transmission signals from the plurality of mobile phone base stations. It has a user database for registering terminal devices and a location registration database for registering portable information terminal devices located in the above-mentioned districts for each predetermined district. When a disaster occurs, the central processing unit exchanges emergency disaster prevention information as described above. The exchange is configured to transmit the emergency disaster prevention information to the plurality of portable information terminal devices based on the user database and the location registration database.

  As described above, according to the present invention, emergency information can be received even by a mobile phone terminal device by realizing an information transmission system in which a disaster prevention radio system and a mobile phone system are integrated. In addition, emergency information can be transmitted to people in places where broadcast audio is difficult to reach, and emergency information can be transmitted to people who are moving or those who are moving visually impaired. There is a feature that an information transmission system can be realized. Therefore, even if the door-to-door receiver to which the character display device is connected is not nearby, the broadcast message can always be received by the mobile phone. In addition, broadcast messages can be sent to people who are in a position where they can not be heard in situations such as heavy rain where the sound from the trumpet speaker of the outdoor slave station is drowned out. In addition, this method is effective as a supplement to voice alerts in urban areas where it is difficult to introduce door-to-door receivers due to the spread of mobile phone base stations.

  An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention, and shows an information transmission system in which a disaster prevention radio system and a mobile phone system are integrated. In FIG. 1, 101 indicates a disaster prevention radio system, and 102 indicates a mobile phone system. The disaster prevention radio system 101 includes a disaster prevention center 103, relay stations 107-1, 107-r,... (When relay stations are collectively referred to as relay stations 107), a plurality of outdoor slave stations 108-1,. (When outdoor slave stations are collectively referred to as outdoor slave stations 108) and a plurality of individual receivers 109-1, ... (individual receivers are collectively referred to as individual receivers 109). ). The disaster prevention center 103 is installed in an administrative organization, for example, a municipal office, and is generally called a base station of a disaster prevention radio system. This base station includes a radio device 104, an operation console 105, and a storage unit 106. The console 105 is composed of a central processing unit such as a computer (hereinafter, the central processing unit is abbreviated as a console). The plurality of outdoor slave stations 108-1,... Receive transmission signals from the radio devices 104 of the disaster prevention center 103 via the relay stations 107, and, for example, voice messages for emergencies are trumpet speakers 108-1 a. ,... Inform the local residents, or inform the residents who are outdoors using the character display device 108-1b,. A plurality of individual receivers 109-1,... Are installed in each home, receive transmission signals from the radio unit 104 of the disaster prevention center 103, and send emergency messages to the speakers 109-1a,. Is output by voice, or an emergency message is displayed on the character display device 109-1b,. The outdoor slave station 108 and the individual receiver 109 are also referred to as wireless information terminal devices.

  The operation of this disaster prevention radio system will be described. For example, when an earthquake occurs and the earthquake information is transmitted to the disaster prevention center 103, the disaster prevention center 103 operates the emergency information on the console 105 of the base station to operate a wireless information terminal device, for example, each outdoor slave station 108 and each individual Transmit to receiver 109. The emergency information in this case is emergency disaster prevention information that conveys a caution or warning regarding the magnitude of the earthquake, the epicenter, or the tsunami. This emergency disaster prevention information is transmitted from the wireless device 104 to each outdoor slave station 108 via the relay station 107. Each outdoor slave station 108 receives this emergency disaster prevention information, and gives warnings, instructions, or details by voice, siren, or character display from the outdoor speaker 108-1a or the character display device 109-1b to the local residents outside. Communicate useful information. Similarly, this emergency disaster prevention information is also transmitted to the individual receiver 109 in each home and transmitted by the speaker 109-1a and the character display device 109-1b.

  On the other hand, the disaster prevention center 103 also transmits the emergency disaster prevention information described above to the mobile phone system 102 via the transmission path 110. The transmission line 110 may be a dedicated line, a public line, or an internet line. Hereinafter, the case where the emergency disaster prevention information mentioned above is transmitted to the portable information terminal device of the cellular phone system will be described. The mobile phone system includes switching stations 111-1, 111-2,... 111-p (the switching station is collectively referred to as switching station 111), base station controllers 112-1, 112-2,. (When the base station controller is generically referred to as the base station controller 112), the mobile phone base stations 113-1, 113-2,... (Referred to as a telephone base station 113) and portable information terminal devices 114-1, 114-2,... 114-n (referred to as the portable information terminal device 114 when the portable information terminal devices are collectively referred to). ing. Each mobile phone base station 113 includes storage units 113-1 a, 113-2 a,... (When the storage unit is generically referred to as a storage unit 113-a).

  Thus, in the mobile phone system described above, a plurality of mobile phone base stations 113 having a storage unit 113-a and a base station controller 112 are connected to an exchange 111 that is a mobile phone operator. There are a plurality of portable information terminal devices 114 that communicate with the mobile phone base station 113 by radio. The portable information terminal device 114 includes an automobile phone, a cellular phone, a PHS, and the like. Here, a cellular phone system will be described as an example. In the storage unit 113-a of the mobile phone base station 113, position information of the mobile information terminal device 114 that is a mobile body is registered. Here, registration of position information of the portable information terminal device 114 in the cellular phone system will be described.

  Between the mobile phone base station 113 and the portable information terminal device 114, the position information is always automatically grasped and registered by a certain procedure. This location registration will be briefly described with reference to Table 1.

  As is well known, in the mobile phone system, the call range is subdivided according to a communication area unit called a cell system or a zone system. Communication areas corresponding to the respective mobile phone base stations 113 are arranged adjacent to each other. That is, each mobile phone base station 113 arranged at a predetermined interval is in charge of the communication area. Further, the base station controller 112 controls the mobile phone base station 113. Each mobile phone base station 113 has a storage unit 113-a, and each mobile phone base station 113 constantly detects the mobile information terminal device 114 located in each communication area, and each storage unit 113- Location registration is performed in a. Table 1 represents a location registration data table indicating that each mobile phone base station 113 registers each mobile information terminal device 114 in the communication area of the mobile station.

  In Table 1, area A is, for example, the communication area of mobile phone base stations 113-1 and 113-2, and mobile information is stored in the communication area of mobile phone base station 113-1 of area A at a predetermined time. Indicates that the terminal devices 114-1, 114-2,... Are located, and indicates that the portable information terminal devices 114-r,... Are located within the communication area of the mobile phone base station 113-2. Show. Similarly, the area B is a communication area of the mobile phone base station 113-3, and the portable information terminal devices 114-5, 114-9,... Are located in the communication area indicated by the area B at a predetermined time. It is shown that. The same applies to other mobile phone base stations 113. Since the portable information terminal device 114 moves within the communication area of each district, the registration contents of the registered portable information terminal device shown in Table 1 are sequentially updated every time the communication area where the portable information terminal device 114 is located changes. Be changed. Therefore, the base station control device 112 monitors this, and when the mobile information terminal device 114 changes the communication area, the base station control device 112 controls the communication area, that is, the mobile phone base station 113 to switch and communicate accordingly. ing. Note that the storage unit 113-a of each mobile phone base station 113 is provided in each mobile phone base station 113 in this embodiment, but may be provided in the base station control device 112.

  Next, an information transmission system in which the above-described disaster prevention radio system and mobile phone system are integrated will be described in detail. The base station installed in the disaster prevention center 103 has a storage unit 106, and the storage unit 106 is provided with a data table in which base stations and relay stations are registered for each area shown in Table 2. .

  In Table 2, districts A, B... N are arranged so as to cover all regions where the information transmission system to which the present invention is applied is constructed. The registered base station or relay station No. For example, relay station 107-2 and mobile phone base stations 113-1 and 113-2 are registered in (ID). Similarly, in the area B, the relay station 107-3 and the mobile phone base station 113-3 are registered. The same applies to other districts. In addition, in the registered IP (Internet Protocol) address, the IP address of each mobile phone base station 113 of the mobile phone system is registered. For example, the registered IP address of the mobile phone base station 113-1 located in the area A is 10.5.1139.1, and the registered IP address of the mobile phone base station 113-2 is 10.5.19.3. It is. Similarly, the registered IP address of the mobile phone base station 113-3 located in the district B is 10.5.19.33. The same applies to the mobile phone base station 113 located in each area. Since the relay station 107 of the disaster prevention radio system is a dedicated communication system as described above, there is no registered IP address (in Table 2, “None” is displayed).

  A specific embodiment of the information transmission system of the present invention configured as described above will be described with reference to FIG. FIG. 2 shows a schematic configuration in which the information transmission system of the present invention is constructed, for example. In FIG. 2, the information transmission system is divided into districts A, B, and N (the division is indicated by a dotted line). In addition, the same code | symbol is attached | subjected to the same thing as FIG. In FIG. 2, for example, a district A is a communication area that covers a coastal district, a district B has a communication area that covers a river region, and a district N has a communication area that covers a mountain village region. To do. In each area, relay ground stations 107 and mobile phone base stations 113 of the disaster prevention wireless system are mixed. The operation of such a system configuration will be described below. For example, when an earthquake occurs and is notified to the disaster prevention center 103, the disaster prevention center 103 needs to notify emergency disaster prevention information to a necessary area. For example, when an earthquake occurs and a tsunami warning is transmitted to the districts A and B, the disaster prevention center 103 first selects a voice and text message stored in the storage unit 106 beforehand. Emergency emergency information is sent to the mobile phone system. FIG. 3 shows an example of the contents of the emergency disaster prevention information. For example, “emergency disaster prevention such as“ residents of district A should evacuate to school X ”and“ residents of district B should evacuate to public hall Y ”. Information.

  Here, when the disaster prevention center 103 receives the information on the occurrence of the earthquake, it is necessary to determine the location of the earthquake, the magnitude of the earthquake, etc., and make an evacuation recommendation to residents near the coastal area and the estuary. For example, if the evacuation advisor is a resident in districts A and B, the disaster prevention center 103 operates the console 105 of the base station to read the data table shown in Table 2 from the storage unit 106 and register the districts A and B. Send emergency disaster prevention information to base stations and relay stations.

  In this case, first, in a disaster prevention radio system, for example, a regional disaster prevention radio system, emergency disaster prevention information is transmitted from the radio unit 104 of the base station of the disaster prevention center 103 to the outdoor slave station 108 of each relay station 107 via each relay station 107 and The information is broadcast to the individual receivers 109 in each home. The communication channel in the case of notification is transmitted in a communication format defined by ARIB STD-T86. FIG. 4 shows an embodiment of the communication format. Specifically, burst transient response ramp time “R”, synchronization word “SW”, channel type “C”, traffic channel “TCH”, high-speed associated channel (call and report information) “FACCH”, pilot symbol “P” , The guard time “G”, and is transmitted as a burst signal. The emergency disaster prevention information as a call or notification shown in FIG. 3 is transmitted using the high-speed associated channel “FACCH”. The numerical values in the figure show an example of the number of symbols. Thus, in the disaster prevention radio system, emergency disaster prevention information is transmitted from the disaster prevention center 103 as a simultaneous report. Therefore, in FIG. 2, in the district A, the emergency disaster prevention information from the disaster prevention center 103 is notified to the outdoor residents at the outdoor slave station 108-2 via the relay station 107-2, for example, and in the district B, The notification is sent to the household receiver 109-3 and the outdoor slave station 108-3 through the relay station 107-3. In addition, since the area N is a mountain village area and is not related to the tsunami warning, no notification is made.

  Thus, those who are unable to hear or cannot hear the emergency disaster prevention information of the individual receiver 109 or the outdoor slave station 108 of the disaster prevention radio system cannot receive this emergency disaster prevention information. If you do not evacuate.

  In the present invention, a cellular phone system combined with a disaster prevention center for this purpose is configured to transmit this emergency disaster prevention information to the portable information terminal device 114. That is, by operating the console 105 of the base station of the disaster prevention center 103, a data table in which the base stations and relay stations for each area shown in Table 2 are registered is read from the storage unit 106. B is selected, and emergency disaster prevention information shown in FIG. 5 is transmitted to the mobile phone base stations 113-1 and 113-2 in the district A and the mobile phone base station 113-3 in the district B. That is, in FIG. 5, the IP address of the mobile phone base station that transmits this emergency disaster prevention information is added to the emergency disaster prevention information shown in FIG. The IP addresses are, for example, the mobile phone base stations 113-1 and 113-2 in the district A and the mobile phone base station 113-3 in the district B in FIG. Emergency disaster prevention information is transmitted to the mobile phone base stations 113-1, 113-2, and 113-3 in the respective districts. Each mobile phone base station 113-1, 113-2, 113-3 receives this emergency disaster prevention information.

  When the cellular phone base stations 113-1, 113-2, and 113-3 receive this emergency disaster prevention information, the storage unit 113-1a included in the cellular phone base stations 113-1, 113-2, and 113-3. 113-2a and 113-3a, all portable information terminal devices 114 registered at that time are read from the table shown in Table 1, and emergency disaster prevention information is transmitted to all portable information terminal devices 114. That is, as shown in FIG. 2, emergency disaster prevention information transmitted from the disaster prevention center 103 is exchange station 111-1, base station controllers 112-1, 112-2, mobile phone base stations 113-1, 113-2, 113. 3 is notified all at once to the portable information terminal devices 114-1, 114-5, 114-9, and 114-r. Therefore, when the information transmission system of the present invention is used, emergency disaster prevention information is received from the mobile phone system even to people who are not received in the disaster prevention radio system, so that a system that is extremely effective at the time of disaster can be realized. In addition, the system construction cost can be reduced by fusing the existing disaster prevention radio system and the existing mobile phone system.

  FIG. 6 is a block diagram showing a schematic configuration for explaining another embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same thing as FIG. Reference numeral 601 denotes a user database, and reference numeral 602 denotes a location registration database of the portable information terminal device 114. The details of the disaster prevention radio system 101 and the mobile phone system 102 are the same as those shown in FIG. 1, and thus the description thereof is omitted in FIG. Here, in the user database 601, the address of the inhabitant and the No. (Or ID) is registered. An example of this registration database is shown in Table 3.

  In Table 3, it is divided for each of the districts A, B,... N, and the address of the inhabitant living in that district and the No. of the portable information terminal device 114. (Or ID) is registered. It should be noted that the divisions of the districts A, B,... N are appropriately determined in consideration of the topography, environment, etc., such as the coastal district, river district, and mountain village district. Moreover, it can also classify | categorize according to the objective which transmits emergency disaster prevention information.

  Also, the location registration database 602 stores the No. of the mobile information terminal device 114 located within the range served by the exchange 111 at a predetermined time. (Or ID) is registered for each district. For example, in the district A, portable information terminal devices 114-1, 114-2 of residents in the district A, portable information terminal devices 114-30, 114-41 other than residents of the district A, and in the district B, People in districts A and B traveling or working from other districts, such as personal digital assistant device 114-5 of residents in district B, personal digital assistant device 114-50 other than residents of district B Mobile information terminal device 114 is registered. Needless to say, the location registration database 602 is updated each time the portable information terminal device 114 moves. An example of the location registration database 602 is shown in Table 4.

  Next, the operation of this embodiment shown in FIG. 6 will be described. For example, emergency disaster prevention information is transmitted from the disaster prevention center 103 when a disaster occurs. In this case, the operation in the disaster prevention radio system 101 is the same as that described with reference to FIG. On the other hand, in the mobile phone system 102, for example, emergency disaster prevention information illustrated in FIG. 3 is transmitted from the disaster prevention center 103 to the exchange 111. Upon receiving the emergency disaster prevention information shown in FIG. 3, the exchange 111 reads the databases shown in Tables 3 and 4 from the user database 601 and the location registration database 602, respectively, and resides in the districts A and B from these databases. The emergency disaster prevention information shown in FIG. 3 is transmitted to the portable information terminal device 114 of the inhabited resident and the portable information terminal device 114 registered at locations A and B at that time. As a result, the emergency disaster prevention information is transmitted to the residents in the districts A and B and the people in the district other than the residents.

  As described above, according to the present invention, it is possible to realize an information transmission system that combines the disaster prevention radio system and the mobile phone system and takes advantage of each advantage. As a result, emergency information can be transmitted to people who are in a place where broadcast audio is difficult to reach, and emergency information can also be transmitted to people who are moving or those who are moving visually impaired. Is possible. In addition, a broadcast message can be received at any time by a mobile phone even by a person other than a resident or a person who is moving. In addition, this system is effective as a report that complements the report of emergency disaster prevention information in urban areas where the introduction of digital communication systems for municipalities is difficult, although the development of mobile phone base stations is widespread.

  Although the present invention has been described in detail above, the present invention is not limited to the embodiments of the information transmission system described herein, and can be widely applied to other information transmission systems. Needless to say.

It is a block diagram for demonstrating schematic structure of one Example of this invention. It is a block diagram for demonstrating the specific structure of one Example of this invention. It is a figure which shows the emergency disaster prevention information of one Example of this invention. It is a figure which shows the format of the signal transmission used by this invention. It is a figure which shows the emergency disaster prevention information which provided the IP address of one Example of this invention. It is a block diagram for demonstrating schematic structure of other one Example of this invention. It is a figure which shows schematic structure of the conventional municipalities disaster prevention digital communication system.

Explanation of symbols

  101: Disaster prevention radio system, 102: Mobile phone system, 103: Disaster prevention center, 104, 703: Radio equipment, 105, 702: Console, 106: Storage unit, 107: Relay station, 108: Outdoor slave station, 109, 706 : Individual receiver, 110: transmission path, 111: switching center, 112: base station control device, 113: mobile phone base station, 114: portable information terminal device, 601: user database, 602: location registration database, 701: characters Display transmission device, 704: Receiver of outdoor loudspeaker, 705: Character display provided in outdoor loudspeaker, 707: Character display, 708: Information terminal device.

Claims (2)

  A disaster prevention radio system and a mobile phone system coupled to the disaster prevention radio system, wherein the disaster prevention radio system includes a central processing unit having a storage unit, a radio that transmits a transmission signal from the central processing unit, and the radio A plurality of relay stations that receive the transmission signals from a mobile station and a plurality of wireless information terminal devices that receive the transmission signals from the plurality of relay stations, and the mobile phone system is coupled to the central processing unit. An exchange station, a plurality of mobile phone base stations having IP addresses, a plurality of base station controllers for appropriately switching and connecting the transmission signals from the exchange to the plurality of mobile phone base stations, and the plurality of mobile phones It consists of a plurality of portable information terminal devices that receive the transmission signal from the telephone base station, and the storage unit of the central processing unit has the plurality of mediums for each predetermined area. A data table in which a plurality of mobile phone base stations having the station and the IP address are registered, and when the disaster occurs, the central processing unit transmits emergency disaster prevention information based on the data table to the plurality of relay stations and the plurality of relay stations. An information transmission system for transmitting to a mobile phone base station.   2. The information transmission system according to claim 1, wherein the plurality of base station control devices or the plurality of mobile phone base stations are positions of the plurality of mobile information terminal devices located in a communication area of the plurality of mobile phone base stations. It has a data table in which information is registered, and the emergency disaster prevention information is simultaneously reported to the plurality of portable information terminal devices based on the data table in which position information of the plurality of portable information terminal devices is registered when a disaster occurs. Information transmission system.

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