JP2007158769A - Wireless communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication system capable of reliably performing communications with a simple configuration without getting into an incommunicable state even in the case of emergency where a breakdown occurs in a part of repeaters due to disaster occurrence, etc. <P>SOLUTION: IDs for identifying slave units and the repeaters are assigned to the transmission electronic messages of the slave units and the repeaters by each electronic message kind in order to constitute a wireless communication network with the slave units and the repeaters by using the same frequency. Thus, it is discriminated whether the electronic message is transmitted from the slave unit or the repeater. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication system using a wireless network (WAN: Wide Area Network), and in particular, an approximate current position of a reporter carrying a mobile station (child device) in a normal state and an emergency notification in an emergency. It is related with the radio | wireless communications system which can specify the reporter who performed operation and report place.

  Conventionally, when an intruder invades, the whistleblower operates an emergency call, transmits the whistleblower data from the whistleblower to the designated whistleblower via the network, and the whistleblower identifies the whistleblower and the place of whistleblowing. Devices (hereinafter referred to as conventional emergency call devices) have been proposed (see, for example, Patent Document 1).

According to this conventional emergency call device, the caller can make a quick emergency call without using an individual portable telephone or public telephone, and an emergency call device for children and students can be installed. Since there is no need to install a new dedicated line along the road to go to and from school, a great deal of cost is unnecessary.
JP 2005-79687

  However, in a wireless communication system used for a conventional emergency call device or the like, a network terminal wired with a power line, a communication line, or the like can function in a power outage at the time of a disaster or in a state where wired communication is disabled. It was difficult.

  In addition, since the handset that is carried has a short battery life, it has only the function of emergency call by the caller's operation in an emergency in order to extend the battery life, and it is possible to specify the approximate current location of the caller carrying it It is difficult to have a regular transmission function for

In order to achieve the above object, a wireless communication system according to claim 1, wherein the wireless communication system includes at least a plurality of relay stations and a plurality of mobile stations, and flexibly constructs a wireless communication network. The plurality of mobile stations transmit identification information for identifying whether it is a relay station or a mobile station at the time of transmission, and the plurality of relay stations and the plurality of mobile stations use the same frequency. .

In order to achieve the above object, the wireless communication system according to claim 2 is characterized in that the relay station is constructed in an ad hoc network.

In order to achieve the above object, a radio communication system according to claim 3 is the radio communication system according to claim 1 or 2, wherein the mobile station is provided with a vibration sensor.

In order to achieve the above object, the wireless communication system according to claim 4 is the wireless communication system according to any one of claims 1 to 3, wherein the relay station includes a power conversion unit that converts natural energy into electric power, and is converted. The power is used as a power source for the relay station.

According to the first aspect of the present invention, the relay station and the mobile station can be wirelessly communicated at the same frequency of one wave.

According to the second aspect of the present invention, even if a part of the relay station breaks down by the same frequency wireless network composed of a plurality of relay stations and a plurality of mobile stations constituting the ad hoc network, it is autonomous by other relay stations. The network can be reconfigured.

According to the invention of claim 3, by providing the vibration sensor in the mobile station, it is possible to optimize the transmission interval by detecting the vibration even if it has a periodic transmission function, and it is possible to eliminate the need for battery replacement for a long period of time. . In addition, the traffic of the wireless communication network can be reduced.

According to the fourth aspect of the present invention, it is possible to eliminate the need for maintenance for a long time by providing the relay station with a so-called autonomous power source using natural energy.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments to which a wireless communication system of the invention is applied will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of a position information confirmation system according to an embodiment of the present invention.

  In the position information confirmation system shown in the configuration diagram of FIG. 1, the slave unit 11a periodically transmits the message S11 (message type is a periodic report) in FIG. 6 (hereinafter referred to as a periodic report), and updates the packet number. The packet number is information for managing the time series of the message S11. The relay station 21a that has received the message S11 in FIG. 6 transmits the message S21a in FIG. 6 to the relay station 21b based on the relay route information (relay destination ID) stored in the memory 205 illustrated in FIG. Similarly, the relay machine 21b that has received the message S21a transmits the message S21a to the relay machine 21c. In this way, the message S21a is received by the gateway-equipped relay 31 through the wireless communication network 71 according to the relay route information.

The relay device 31 with the gateway encrypts the information of the message S21a with SSL or the like, and transmits the message S31 to the server 41 via the communication infrastructure 81 such as the Internet. The server 41 creates the location information of the slave unit 11a based on the slave unit receiving station ID of the telegram S31 (the ID of the relay unit that received the telegram S11a) and the slave unit information, and updates the database.

  In addition, when a plurality of relay stations receive the message S11a at the same time, the relay station that has received the message S11a transmits the message S21 to the gateway-equipped relay 31 based on the respective relay route information (for example, the message S21a and the message S21e are transmitted). Sent to the gateway-equipped relay 31). The gateway-equipped relay 31 separately encrypts the message S21a and the message S21e, and transmits the message S31 to the server 41. The server 41 that has received a plurality of pieces of the same slave unit information creates a database of position information based on the slave unit receiving station ID and the received electric field strength.

When confirming the position of the slave unit 11a, the server 41 is accessed S41 from a terminal device such as a personal computer 51 or a mobile phone 61 connected to the Internet (communication infrastructure) 81 using a Web browser. At this time, the server 41 may request an ID and a password, and secure personal information and security so that an unspecified number of terminal devices cannot be accessed. The server 41 transmits the position information S41 of the child device 11a to the terminal device. The terminal device that has received the position information of the slave unit 11a displays the position information on the Web browser.

Here, the subunit | mobile_unit 11 incorporates the vibration sensor 101 shown in FIG. 4, and the control part 102 monitors the sensor information of the vibration sensor 101. FIG.

For example, when the control unit 102 determines that “the person carrying the handset is moving”, the wireless unit 103 is turned on at a regular notification interval of T1 [seconds], and the wireless unit 103 transmits a message S11. The control unit 102 turns off the power of the wireless unit 103. Further, when the control unit 102 determines that “the person carrying the child device is stationary”, the periodic notification interval is switched to T2 [seconds] longer than T1, and the periodic notification is performed. As a result, the number of transmissions can be reduced, and the power consumption of the slave unit can be reduced. In addition, since the position information does not change when the handset 11 is stationary, the function of the position information confirmation system is not impaired even if periodic notification is made at a longer time interval than when the handset 11 is moving, and communication traffic is reduced. Can be realized.

In addition, the slave unit 11 includes an emergency button 104 and a buzzer 105. When the emergency button 104 is pressed, the slave unit 11b transmits a message S11b (message type is emergency notification). When the emergency button 104 is pressed, the buzzer 105 sounds and threatens the suspicious person. The relay device 21i that has received the message S11b in FIG. 6 transmits the message S21b based on the relay route information (relay destination transmission destination ID) stored in the memory 205, and is received by the gateway-equipped relay device 31.

The gateway-equipped relay 31 encrypts the information of the message S21b with SSL or the like, and transmits the message S31 to the server 41 via the Internet (communication infrastructure) 81.

The server 41 creates the location information of the slave unit 11 based on the slave unit receiving station ID of the telegram S31 (the ID of the relay unit that received the telegram S11b) and the slave unit information, and updates the database. Then, the server 41 transmits E-mail S51 of the emergency information of the slave unit to the personal computer 51 or the mobile phone 61 that is a predetermined report destination. Thereby, the emergency information (danger) of the person carrying the handset can be known from a remote location.

FIG. 2 is a configuration diagram of an elderly person monitoring system according to an embodiment of the present invention.
When the control unit 102 of the slave unit 12a determines that “the person carrying the slave unit is active” from the information of the vibration sensor, the control unit 102 transmits the message S12a of FIG. 6 at a regular notification interval of T1 [seconds]. In addition, when the control unit 102 of the child device 12b determines from the information of the vibration sensor that “the person carrying the child device is not active”, the control unit 102 transmits the message S12b at a regular notification interval of T2 [seconds].

The relay device 22 that has received the electronic messages S12a and S12b transmits the electronic message S22 in FIG. 6 based on the relay path information (relay destination transmission destination ID) stored in the memory 205 shown in FIG. In this way, the message S22 is received by the gateway-equipped relay 32 through the wireless communication network 72 according to the relay route information.

The gateway-equipped relay 32 encrypts the information of the message S22 with SSL or the like, and transmits the message S32 to the server 42 via the Internet (communication infrastructure) 82. The server 42 creates location information of the slave unit 12a and the slave unit 12b based on the slave unit receiving station ID of the telegram S32 (the ID of the relay unit that received the telegram S22) and the slave unit information, and updates the database. In addition, the movement information of the slave unit 12a and the slave unit 12b is also updated.

The server 42 monitors the time when the person carrying the child device is not active, and when the predetermined time is exceeded, the server 42b obtains the position information and movement information of the child device 12b as a predetermined report destination personal computer 52 or An E-mail S42 is transmitted to the mobile phone 62. Thereby, an elderly person's movement can be confirmed from a remote place.

FIG. 3 is a configuration diagram of a safety confirmation system in a disaster according to an embodiment of the present invention.

When a person left behind in a house collapsed at the time of a disaster such as an earthquake presses the emergency button 104 of the slave unit 13, the slave unit 13 transmits a telegram S13 (the telegram type is emergency report). The relay device 23f that has received the electronic message S13 immediately transmits the electronic message S23 based on the relay route information (relay destination transmission destination ID) stored in the memory 205 of the relay device. Further, when the emergency button 104 is pressed, the buzzer 105 sounds and the rescuer nearby can be notified of the position of the victim.

As shown in FIG. 5, the repeater is composed of a power generator 201 using natural energy (natural energy means solar, wind, hydropower, tidal power, etc.), a charge / discharge control unit 202, and a secondary battery 203. Since it is driven by a so-called autonomous power source, it is a mechanism that is not affected by the power infrastructure. Even if some of the repeaters such as the repeater 23g stop functioning and the line between the repeaters S23f and S23d is disconnected, a new relay route is automatically relayed by the ad hoc network algorithm. Machine 23f → Relay machine 23e → Relay machine 23c → Relay machine 23d is a system that minimizes system damage.

Here, an ad hoc network is a network that enables data transmission by hopping (relaying) between repeaters without using a base station or a fixed station.

The server 43 and the wireless communication network 73 are normally connected to the gateway-equipped relay unit 33 via the communication infrastructure 83. However, by using the wireless communication network 73 as a backup line for the communication infrastructure 83, a disaster can be caused. It is a strong system.

Here, the systems of FIGS. 1, 2 and 3 constitute a wireless communication network with only one radio wave. FIG. 6 shows an embodiment for discriminating between the transmission message of the slave unit and the transmission message of the relay unit.

In FIG. 6, an ID for distinguishing a slave unit and a relay unit is assigned to a message type, thereby distinguishing which message is transmitted by the slave unit or the relay unit. In the present embodiment, the distinction by the message type is shown, but the child device and the relay device can be distinguished by various methods such as the distinction by the data format without being limited by the message type.

In addition, although the Internet has been described as an example of the communication infrastructure for connecting the wireless communication network and the server in the systems of FIGS. 1, 2 and 3 used as the embodiment of the wireless communication system of the present invention, There are cable TV networks, optical networks, disaster prevention radios, police radios, fire fighting radios, train radios, satellite telephone lines, and the like.

It is a block diagram of the positional information confirmation system of this invention. It is a block diagram of the movement information confirmation system of this invention. It is a block diagram of the safety confirmation system at the time of disaster of this invention. It is a block diagram which shows the structure of a subunit | mobile_unit. It is a block diagram which shows the structure of a relay machine. It is a figure which shows the structure of each message | telegram which a subunit | mobile_unit and a relay machine transmit.

Explanation of symbols

11a, 11b, 12a, 12b, 13: slave unit 101: slave unit vibration sensor 102: control unit 103: wireless unit 104: emergency button 105: buzzer 21a-21i, 22a-22i, 23a-23n: relay unit 201: Solar cell 202: Charge / discharge control circuit 203: Secondary battery 204: Control unit 205: Memory 206: Wireless unit 31, 32, 33: Relay device with gateway 41, 42, 43: Server 51, 52: Personal computer (terminal device)
61, 62: Mobile phone (terminal equipment)
71, 72, 73: Wireless communication network 81, 82, 83: Communication infrastructure such as the Internet

Claims (4)

  In a wireless communication system having at least a plurality of relay stations and a plurality of mobile stations and flexibly constructing a wireless communication network, the plurality of relay stations and / or the plurality of mobile stations are relay stations or mobile stations. A wireless communication system, wherein identification information for identification is transmitted at the time of transmission, and the plurality of relay stations and the plurality of mobile stations use the same frequency.   The wireless communication system according to claim 1, wherein the relay station is constructed by an ad hoc network.   The wireless communication system according to claim 1, wherein the mobile station includes a vibration sensor. The wireless communication system according to claim 1, wherein the relay station includes a power conversion unit that converts natural energy into electric power, and the converted power is used as a power source of the relay station.