JP6520625B2 - TIDE LEVEL MEASUREMENT PROGRAM, TIDE LEVEL MEASUREMENT METHOD, TIDE LEVEL MEASUREMENT SYSTEM, AND INFORMATION PROCESSING DEVICE - Google Patents

Description

  Embodiments of the present invention relate to a tide level measurement program, a tide level measurement method, a tide level measurement system, and an information processing apparatus.

  Conventionally, a ship has a radio communication system that performs radio communication using a short wave band with a base station on land, and reports position information of the ship to the base station by radio communication. For example, a ship with a gross tonnage of 20 tons or more is installed with GMDSS (Global Maritime Distress and Safety System) as a wireless communication system. In addition, for fishing boats with a gross tonnage of less than 20 tons, "Desirable GMDSS", which reports location information three times a day using wireless communication, is being conducted.

  When an earthquake occurs, the change in sea surface measured by the ship is notified to the base station on the land by wireless communication, and the base station side detects a tsunami based on the information notified from the ship.

Unexamined-Japanese-Patent No. 11-63984 gazette

  However, in the above-described conventional technology, there is a problem that congestion occurs in wireless communication between the base station and a plurality of ships, and the reception probability that the base station receives a notification from the ships is reduced. For example, wireless communication between a base station and a ship has a slow communication speed and a limited bandwidth because of wireless communication using a short wave band. For this reason, when many vessels on the ocean are notified of changes in the sea surface at the same time, congestion may easily occur and reception on the base station side may be difficult.

  Also, as an example of a situation where reception becomes difficult, there are interference due to fading phenomena and the like, and some errors occur. Fading phenomena include coherent fading, polarization fading, jump fading, absorption fading, selective fading and K-type fading. Coherent fading is fading that occurs due to a path difference when there are multiple paths that radio waves of wireless communication can reach. Polarization fading is fading that occurs due to a change in polarization plane when radio waves are reflected to the ionosphere. Jumping phasing is fading that occurs when radio waves are reflected by the ionosphere or penetrate the ionosphere due to fluctuations in ionospheric density. Selective fading is fading that occurs due to a band attenuated by a frequency selective medium in a transmission path of radio waves and an amount of attenuation changing with time. K-type fading is a fading that occurs when the equivalent radius coefficient (K) of the earth fluctuates due to weather conditions and the like, and the degree of bending of the radio wave transmission path fluctuates.

  In one aspect, it is an object of the present invention to provide a tide level measurement program, a tide level measurement method, a tide level measurement system, and an information processing apparatus capable of suppressing occurrence of congestion in wireless communication between a base station and a ship.

  In the first proposal, the tide level measurement program causes the computer to execute a process of transmitting a response request to transmit the position information of the ship when the ship is located within a predetermined distance from the coastline. In addition, when the tide level measurement program receives a response to the sent response request, the tide level measurement program causes the computer to execute processing for storing the received position information of the ship for each ship. In addition, the tide level measurement program causes the computer to execute processing for identifying a predetermined ship located between the epicenter and the coastline based on the stored ship position information. In addition, the tide level measurement program causes the computer to measure the tide level for the specified vessel, and when there is a predetermined tide level change, includes at least the size of the tide level change and the position at which the tide level change is detected. Execute processing to send a measurement request to send information.

  Congestion can be suppressed in radio communication between the base station and the ship.

FIG. 1 is a block diagram showing an example of the configuration of an information processing system according to the embodiment. FIG. 2 is an explanatory view for explaining the outline of the mobile terminal. FIG. 3 is an explanatory diagram for explaining an example of a message format. FIG. 4 is a ladder chart showing an operation example of the information processing system according to the embodiment. FIG. 5 is a flowchart showing an example of the ship identification process. FIG. 6 is an explanatory view for explaining the identification of a ship. FIG. 7 is an explanatory view for explaining the tsunami information MAP. FIG. 8 is an explanatory view for explaining the tsunami information MAP. FIG. 9 is an explanatory diagram for explaining an example of a computer that executes a program.

  Hereinafter, with reference to the drawings, a tide level measurement program, a tide level measurement method, a tide level measurement system, and an information processing apparatus according to an embodiment will be described. The components having the same functions in the embodiments are denoted by the same reference numerals, and the redundant description will be omitted. The tide level measurement program, the tide level measurement method, the tide level measurement system, and the information processing apparatus described in the following embodiments are merely an example, and the embodiments are not limited. In addition, each of the following embodiments may be appropriately combined within the scope of no contradiction.

  FIG. 1 is a block diagram showing an example of the configuration of an information processing system 1 (a tide measurement system) according to the embodiment. As shown in FIG. 1, the information processing system 1 includes a mobile terminal 10, a plurality of base stations (50-1 to 50-n), and an information processing apparatus 100. The plurality of base stations (50-1 to 50-n) will be described as "base station 50" when they are collectively referred to without distinction. The number of base stations 50 is not limited, and any number of base stations 50 may be provided.

  The mobile terminal 10 is installed, for example, on a ship 20 such as a fishing boat that travels offshore, and is moved along with the navigation of the ship 20. Although one of the plurality of vessels 20 is illustrated in the illustrated example, the number of vessels 20 on which the mobile terminal 10 is installed is not limited, and any number of vessels 20 may be provided. .

  The mobile terminal 10 is a terminal device that performs wireless communication with the base station 50 by radio waves in a short wave band using reflection of the ionosphere L. FIG. 2 is an explanatory view for explaining the outline of the mobile terminal 10. As shown in FIG. 2, the mobile terminal 10 is a terminal such as a PC (personal computer) or a tablet type terminal via a serial communication port or the like to the wireless device 10a which performs wireless communication by radio waves of shortwave band via an antenna 10c. The apparatus 10b may be connected. The wireless communication in the mobile terminal 10 is performed under the control of the terminal device 10b connected to the wireless device 10a.

  The base station 50 is a base station installed in the Fisheries Radio Association, for example, provided near a fishing port. Similar to the mobile terminal 10 illustrated in FIG. 2, the base station 50 is configured to connect an antenna such as a PC via a serial communication port or the like to a wireless device that performs wireless communication via shortwave radio waves via an antenna. It may be.

  The plurality of base stations 50 and the information processing apparatus 100 are communicably connected to each other via the network N. As the network N, any type of communication network such as a LAN (Local Area Network) or a VPN (Virtual Private Network) can be adopted, including the Internet, regardless of wired or wireless.

  Further, in the information processing system 1, for example, the information processing apparatus 100 is provided on a cloud such as a data center, and is connected to each base station 50 via the network N. Further, in the example of FIG. 1, the base station 50-1 is installed, for example, in Miyagi, and the other base stations 50 are installed, for example, in Mie, Kagoshima, Okinawa. The base station 50 may be installed within the Fisheries Radio Association adjacent to the fishing port, or may be installed alone.

  The ship 20 uses, for example, management information including position information indicating the position of the ship three or more times a day for deemed GMDSS, and one or more of a plurality of base stations 50 using the mobile terminal 10 Send to GMDSS is a wireless communication system that is required to be installed on vessels with a gross tonnage of at least 20 tons, but for vessels with a gross tonnage of at less than 20 tons, reporting of location information three times a day is carried out , GMDSS installation is exempted. The radio waves transmitted from the ship 20 are reflected by the ionosphere L and reach one or more base stations 50 out of the base stations 50 outside the sight line distance. When the base station 50 that has received the radio wave receives the radio wave transmitted from the mobile terminal 10 and acquires the management information, the base station 50 transmits the acquired management information to the information processing apparatus 100 via the network N.

  The information processing apparatus 100 receives the management information from the ship 20 via the base station 50. The information processing apparatus 100 manages the ship 20 based on the received management information. Further, when the information processing apparatus 100 receives management information of a certain ship 20 from the base station 50 of the Fisheries Radio Association different from that of the Fisheries Radio Association to which the ship 20 belongs, the fishery to which the ship 20 belongs Transfer to base station 50 of wireless association. Further, the information processing apparatus 100 transmits emergency information to each ship 20 via each base station 50 when, for example, an emergency earthquake alert or a tsunami forecast is issued. The information processing apparatus 100 receives response information corresponding to emergency information from each mobile terminal 10 via each base station 50.

  Then, each component which comprises the information processing system 1 is demonstrated. The mobile terminal 10 includes a communication unit 11, a storage unit 12, a positioning unit 13, a sea level detection unit 14, a display operation unit 15, and a control unit 16. The ship 20 connects the wireless device 10 a and the sea level detection unit 14 to the terminal device 10 b having the storage unit 12, the positioning unit 13, the display operation unit 15, and the control unit 16, for example. It may be configured. The mobile terminal 10 may have various functional units of a known computer, for example, various functional units such as various input devices and voice output devices, in addition to the functional units shown in FIG. As an example of the mobile terminal 10, a tablet terminal, a portable personal computer or the like can be adopted.

  The communication unit 11 is realized by, for example, a medium wave to a short wave band radio. The communication unit 11 is a communication interface that is wirelessly connected to any one or more of the plurality of base stations 50 via the ionosphere L and manages communication of information with the base station 50. The communication unit 11 transmits, to the base station 50, management information, response information, and the like input from the control unit 16. The communication unit 11 also receives radio waves transmitted from the information processing apparatus 100 via the base station 50, and acquires various types of information such as emergency information.

  The communication unit 11 is, for example, one or more frequency bands among 2 MHz band, 4 MHz band, 8 MHz band, 12 MHz band, 16 MHz band, 30 MHz band and 50 MHz band or more as radio waves of medium to short wave or ultra high frequency band. Can be used. The communication unit 11 uses, for example, a frequency band selected according to the distance to the land and the time zone by the operation of the operator or the control of the control unit 16. This is because the propagation condition of radio waves in the medium wave, the short wave band and the ultrashort wave band is influenced by the ionosphere L which is different in state depending on the solar activity and the day and night. The selection of the frequency is performed by calculating the distance to the representative base station 50 based on the position information acquired by positioning by the positioning unit 13, and weighting each frequency according to the calculated distance, season, and time. It may be done to select a more reachable frequency. Also, the selection of frequency is made in consideration of the band characteristics of each frequency band.

  The communication unit 11 can use, for example, digital modulation such as PSK (Phase Shift Keying) or FSK (Frequency Shift Keying) as a modulation method. Further, the communication unit 11 can use, for example, a modulation scheme such as PSK 31 in a low frequency band. For example, PSK 31 is a slow communication speed of 31 baud, but has a narrow dedicated band and is suitable for data communication in a short wave band mainly for communicating text data. The communication unit 11 uses serial communication using RS-232C to control the communication unit 11, for example, as a method of connection with the control unit 16, and uses voice communication to transmit and receive data such as various information. A terminal can be used to input and output a modulation signal.

  The storage unit 12 is realized by, for example, a semiconductor memory device such as a random access memory (RAM) or a flash memory, or a storage device such as a hard disk or an optical disk. The storage unit 12 stores various information such as measured sea level information, position information, and information used for processing in the control unit 16.

  The positioning unit 13 receives a signal of the satellite positioning system and performs position measurement (positioning). The positioning unit 13 performs positioning by receiving signals of a global positioning satellite system such as GPS (Global Positioning System), GLONASS (Global Navigation Satellite System), Galileo, and compass as a satellite positioning system. The positioning unit 13 performs positioning when requested by the control unit 16 and outputs positioning results as position information based on a geodetic system such as WGS (World Geodetic System) 84 or the like. When the positioning unit 13 is requested by the control unit 16 to continue positioning continuously, the positioning unit 13 continuously performs positioning, and continues to output the position information until the control unit 16 requests stop. When the positioning unit 13 integrates with the sea level detection unit 14, for example, information in the height direction (size of change in tide level) in the positioning result and a time (change in time) corresponding to the change in the height direction The information on time) is output to the control unit 16 as sea level information. The positioning unit 13 receives signals of Quasi-Zenith Satellite System, Indian Regional Navigation Satellite System, DORIS (Doppler Orbitography and Radio-positioning Integrated by Satellite), and regional navigation satellite systems such as Beidou as satellite positioning systems. May be

  The sea level detection unit 14 is a sensor that detects the sea level. The sea level detection unit 14 measures the altitude of the ship 20 by performing three-dimensional positioning by receiving a signal of the satellite positioning system, for example, and detects the sea level based on the measured altitude. That is, the sea level detection unit 14 is a so-called 3DGPS (3 dimension Global Positioning System). The sea level detection unit 14 outputs the detected sea level to the control unit 16 as sea level information including time information. That is, the sea level information includes, for example, the sea level "1 m" and the detection time "10 seconds" when the sea level is increased by 1 m from the average sea level for 10 seconds.

  In addition, since the sea level detection unit 14 can be integrated with the positioning unit 13 that receives a signal of the satellite positioning system and performs positioning, measurement in the case of using the satellite positioning system will be described together with the positioning unit 13. The sea level detection unit 14 may use a sensor different from the positioning unit 13. For example, the sea level detection unit 14 may be an acoustic sounding instrument that measures water depth using ultrasonic waves. The sea level detection unit 14 detects the sea level from the average sea level based on, for example, the water depth measured by the sound sounding instrument, and the sea level information including the detected sea level and information on the change time It is output to the control unit 16.

  Also, the method of detecting the magnitude of the change in tide level is not limited to the method of determining the sea level. For example, based on the detection result of the water flow detector dropped from the ship 20 into the sea, changes in the flow direction and acceleration of the tidal current may be detected, and the detection result may be output to the control unit 16 as sea level information.

  The display operation unit 15 is a display device for displaying various information, and an input device for receiving various operations from the user. For example, the display operation unit 15 is realized by a liquid crystal display or the like as a display device. Further, for example, the display operation unit 15 is realized by a touch panel or the like as an input device. That is, in the display operation unit 15, the display device and the input device may be integrated. Further, the display operation unit 15 displays a keyboard at the lower part of the screen, for example, as a user interface, and accepts key input. The display operation unit 15 outputs the operation input by the user to the control unit 16 as operation information.

  The control unit 16 is realized, for example, by a program stored in an internal storage device being executed by using a RAM as a work area by a central processing unit (CPU), a micro processing unit (MPU) or the like. Further, the control unit 16 may be realized by an integrated circuit such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA). The control unit 16 controls the entire mobile terminal 10, for example.

  The control unit 16 requests the positioning unit 13 to perform positioning. The control unit 16 outputs, to the positioning unit 13, either a positioning request only once or a request to continue positioning continuously as the positioning request. When the position information according to the positioning request is input from the positioning unit 13, the control unit 16 inserts the position information into a message format to generate a message as management information. Further, when the sea surface height information is input from the sea surface height detection unit 14, the control unit 16 adds the sea surface height information to the management information. The control unit 16 outputs the generated message, that is, the management information to the communication unit 11. The control unit 16 may encrypt the position information so that the device within the Fisheries Radio Association to which the ship 20 belongs can decrypt. For this encryption, for example, a known public key cryptosystem can be used.

  In addition, the control unit 16 may verify the authenticity of information by using a TCG (Trusted Computing Group) technology, and may realize secure transmission of information. Here, an example of the TCG technology will be described.

  Terminals and devices that communicate with the outside are constantly exposed to security threats, and viruses, spyware, other malicious scripts, unauthorized access, etc. may cause unexpected changes to the software structure that constitutes the platform. For such risks, TCG realizes a secure computing environment by guaranteeing the reliability of the platform. Here, the platform indicates hardware, an OS, an application, and the like.

  For example, there is a limit to security measures that rely on conventional software against the threat of tampering with software. For this reason, in TCG, a TPM (Trusted Platform Module) chip (not shown) is embedded in the platform, and the TPM chip is used as a root of trust to create a highly reliable computing environment in which tampering is extremely difficult. In addition, by using a TPM chip, hardware-based data / certificate protection and a secure cryptographic processing environment can be realized.

  Next, the TPM chip will be described. The TPM chip is a birdware chip that is bound to an electronic device (e.g., the mobile terminal 10) and has tamper resistance. The TPM chip is physically bound to the main components of the electronic device so that it can not be removed from the electronic device. For example, component parts of the electronic device correspond to a motherboard or the like. The TPM chip is designed with the implemented functions, memory area and processor power minimized, so it can be manufactured at low cost and can be applied to various electronic devices and platforms.

  For example, the functions of the TPM include a function of generating and storing an RSA (Rivest Shamir Adleman) private key, and a function of signing, encrypting and decrypting with an RSA private key. In RSA, a pair of private key and public key is created. Further, the functions of the TPM include a function of performing a hash operation of SHA-1 (Secure Hash Algorithm 1) and a function of holding environmental information of the electronic device. When the bound electronic device starts up, the TPM measures the software code in the BIOS, the OSloader, and the boot process to the OS kernel, hashes the measured software code, and registers it in the register in the TPM. Further, the TPM collects hardware information of the bound electronic device, hashes the hardware information, and registers the information in a register in the TPM.

  TCG technology defines a software stack and a software interface in order to use the TPM chip, which is a hardware device, from higher-level applications and libraries. This software stack is called TSS (TCG Software Stack), and is composed of a software module that stores the function of the resource limited TPM chip. The application of the electronic device can access the functions of the TPM chip described above by using the interface provided by the TSS. The TPM chip secures the legitimacy of hash value collection by managing the hashing and signing rules for collecting the hash value with the TPM chip on the customer system side. Moreover, the TPM chip proves the non-falsification of the rules by checking the current rules and signatures as necessary. That is, the authenticity of the process and information concerning the control unit 16 can be verified. As a result, the TPM chip ensures that there is no tampering with the rules for collecting the hash value by referring to the rules for which non-falsification has been proven on the TPM chip side.

  Further, the control unit 16 may insert the information hashed and signed by the TPM chip into a message format, and generate a message which is management information. In this case, it is possible to verify the reliability of the processing and information concerning the control unit 16 in the device that has received the generated message (for example, the device within the Fisheries Radio Association to which the ship 20 belongs).

  The control unit 16 has a plurality of operation modes as a mode for transmitting information. As an example of this operation mode, a first mode used at a normal time such as reporting fixed-time position information to the base station 50 and a second mode used at an emergency such as broadcast reception from the base station 50 when an earthquake occurs There is a mode.

  The control unit 16 switches from the first mode to the second mode, for example, when receiving an emergency broadcast at the time of an earthquake occurrence from the base station 50 via the communication unit 11. The first mode is a mode in which sea level information and position information are transmitted at a fixed time. The second mode transmits current position information based on emergency broadcast. Next, in the case where there is a broadcast of a measurement request specifying the ship according to the identification information of the ship 20, this is a mode for transmitting the position information and the sea level information (details will be described later).

  The broadcast in the second mode (emergency broadcast from the base station 50 and response from the ship 20) is also referred to as an emergency protocol. In this emergency protocol, it may be divided into a plurality of frequency bands and broadcast (on multiple channels). As described above, by dividing and broadcasting into a plurality of frequency bands, even if interference occurs in a certain frequency band, transmission may be possible in another frequency band, and the transmission probability of information can be increased.

  The control unit 16 normally transmits, for example, management information to the base station 50 via the communication unit 11 at regular times using the first mode. For example, when an emergency earthquake bulletin, a tsunami forecast, or the like is issued, the control unit 16 uses the communication unit 11 to notify the occurrence of an earthquake from the base station 50 (a request for transmission of position information to each ship 20) Receive When receiving the emergency broadcast, the control unit 16 performs switching control from the first mode to the second mode. Next, the control unit 16 inserts the position information into the message format to generate a message that is response information. The control unit 16 transmits the generated message, that is, the response information to the base station 50 via the communication unit 11.

  Next, the control unit 16 receives the broadcast from the base station 50 via the communication unit 11, and confirms the content of the message format 30 (see FIG. 3) broadcasted by the base station 50. If the content of the telegram format 30 broadcasted is a measurement request specifying the ship according to the identification information of the ship 20, the control unit 16 inserts the sea level information and the position information into the telegram format, and then responds. Generate a message that is The control unit 16 transmits the generated message, that is, response information to the measurement request to the base station 50 via the communication unit 11.

  When transmitting the response information to the measurement request in the second mode, the control unit 16 determines whether the ending condition for ending the second mode is satisfied. The end condition is, for example, the number of repetitions, a time zone, or the like. As the number of repetitions, for example, contents to be transmitted to the tenth report at intervals of 10 minutes are set in advance. Further, the time zone is, for example, a setting in which transmission of response information is repeated when the time zone is a predetermined time zone of one day. The control unit 16 repeats the transmission of the response information when the end condition is not satisfied. When the end condition is satisfied, the control unit 16 switches from the second mode to the first mode, and ends the process.

  Here, an example of the message format will be described. FIG. 3 is a diagram showing an example of the message format 30. As shown in FIG. As shown in FIG. 3, the message format 30 is an example of a message format for transmitting management information used by the ship 20 in the considered GMDSS, for example. For example, the message format 30 includes "Char code", "format ver", "Message Type", "name of a vessel", "Call Sign", "nationality", "prefectures", "Geographic Point Location", and "Parity". Items such as In addition, although the length of the message format 30 is 104 bytes as an example, it is not limited to this, It can be set as arbitrary length. Furthermore, the message format 30 may provide items corresponding to various other information.

  "Char code" indicates a character code system. “Format ver” indicates the version of the message format 30, and is an item for coping with format change. “Message Type” indicates a message type, and indicates, for example, a message type such as automatic, manual, request transmission, or emergency. “Name of a vessel” represents the ship name or identification information of the ship 20. Note that “name of a vessel” may indicate the name and identification information of the ship 20 if the number of characters is enough. "Call Sign" represents the call sign of the wireless station for reliable identification. "Nationality" is an abbreviation of "nationality registration" and indicates a national flag of registration. "Prefectures" represents the affiliated prefecture. “Geographic Point Location” indicates location information, and for example, indicates a positioning system, latitude and longitude. "Parity" is a parity for confirming complete reception of a message.

  Returning to FIG. 1, the base station 50 includes a communication unit 51 and a control unit 52. The base station 50 has, for example, a radio set for each frequency band, and an antenna (not shown) is connected to each radio set, and can communicate with a plurality of ships 20 simultaneously in each frequency band.

  The communication unit 51 is realized, for example, by a radio of medium wave to short wave band or ultra high frequency band. The communication unit 51 is realized by, for example, a network interface card (NIC) or the like in order to communicate with the information processing apparatus 100 via the network N. The communication unit 51 is wirelessly connected to any one or more of the plurality of vessels 20 via the ionosphere L, and is connected to the information processing apparatus 100 via the network N. That is, the communication unit 51 is a communication interface that manages communication of information between the ship 20 and the base station 50, and between the base station 50 and the information processing apparatus 100. That is, the base station 50 relays communication between the ship 20 and the information processing apparatus 100. The communication unit 51 performs connection with the network N by wire or wirelessly.

  The communication unit 51 may be, for example, a plurality of radios, for example, 2 MHz band, 4 MHz band, 8 MHz band, 12 MHz band, 16 MHz band, 30 MHz band, 50 MHz band or more as a radio of medium wave to short wave band or ultra high frequency band. The radio waves transmitted from the ship 20 are received using seven radios corresponding to the band. The communication unit 51 receives the radio signals using radio waves of different frequencies transmitted from the plurality of vessels 20 by the plurality of radios of the corresponding frequency. The frequency band to be used is determined according to one or more of the position of the ship 20 and the time zone. Further, the communication unit 51 uses, as a modulation method, the same modulation method as that of the communication unit 11 of the ship 20. Further, the communication unit 51 can use serial communication using RS-232C and data communication using an audio input / output terminal for connection with the control unit 52.

  The communication unit 51 extracts management information or response information from the received radio wave, and outputs the management information or the response information to the control unit 52. The communication unit 51 also transmits the extracted management information or response information to the information processing apparatus 100 via the network N using the NIC. At this time, the communication unit 51 also transmits information indicating the reception sensitivity of the radio wave received from the ship 20 to the information processing apparatus 100. The information indicating the reception sensitivity includes, for example, the signal strength when the signal is received from the ship 20, the error rate of the signal, and the like. When the communication unit 51 receives a broadcast request such as an emergency broadcast from the information processing apparatus 100 via the network N, the communication unit 51 transmits a radio wave including the content requested to the ship 20 in the message format 30.

  The control unit 52 controls the entire base station 50. When the management information or the response information is input from the communication unit 51, the control unit 52 causes, for example, a display unit (not shown) to display that the management information or the response information has been received. The control unit 52 is, for example, a computer for controlling the base station 50, and may be, for example, an embedded computer or a stationary personal computer.

  The information processing apparatus 100 is a computer that manages information of each ship 20 and transmits various information to each ship 20. The information processing apparatus 100 includes a communication unit 110, a storage unit 120, and a control unit 130. The information processing apparatus 100 may have various functional units of a known computer, for example, various functional units such as various input devices and voice output devices, in addition to the functional units shown in FIG. Further, the information processing apparatus 100 may be configured on a so-called cloud, and may be freely expanded or changed in configuration.

  The communication unit 110 is realized by, for example, an NIC or the like. The communication unit 110 is a communication interface connected to the base station 50 via a network N in a wired or wireless manner, and manages communication of information with the base station 50. In addition, the communication unit 110 manages communication with an external server device (not shown), and receives provision of information such as, for example, an early earthquake early warning or a tsunami forecast when an earthquake occurs.

  The communication unit 110 receives management information from the base station 50. The communication unit 110 outputs the received management information to the control unit 130. Further, the communication unit 110 receives, from the control unit 130, management information in which identification information of the mobile terminal 10 (the ship 20) is specified. The communication unit 110 is a management organization corresponding to the received management information, that is, the base station 50 of the Fisheries Radio Society to which the ship 20 on which the mobile terminal 10 transmitting the management information is installed belongs. Send to

  The storage unit 120 is realized by, for example, a storage device such as a RAM, a semiconductor memory device such as a flash memory, or a hard disk or an optical disk. The storage unit 120 includes a management information storage unit 121 and a measurement information storage unit 122. Further, the storage unit 120 stores information used for processing in the control unit 130.

  The management information storage unit 121 is a database or the like that manages information of each ship 20, and is transmitted from, for example, identification information of the ship 20, a management organization to which it belongs, a port (fishery port) to which it belongs, contact information, and the ship 20 The position information and the information indicating the reception sensitivity at the time of reception are associated and stored. The measurement information storage unit 122 is a database or the like that manages measurement information such as the position measured by each ship 20 and the sea level. The measurement information storage unit 122 manages, together with the identification information of the ship 20, the measurement information such as the position and the sea surface height which each ship 20 has measured and notified through the base station 50.

  The control unit 130 is realized by, for example, a program stored in an internal storage device being executed by a CPU, an MPU, or the like, using a RAM as a work area. Also, the control unit 130 may be realized by an integrated circuit such as an ASIC or an FPGA, for example. The control unit 130 includes a response request unit 131, a response reception unit 132, a ship identification unit 133, a measurement request unit 134, a measurement information reception unit 135, and an output unit 136, and the information processing described below Realize or execute the function or action of Note that the internal configuration of the control unit 130 is not limited to the configuration illustrated in FIG. 1, and may be another configuration as long as it performs the information processing described later.

  For example, when an emergency earthquake bulletin or a tsunami forecast is issued, the response request unit 131 requests each base station 50 to make an emergency broadcast to each ship 20, and ships 20 within a predetermined distance from the shoreline. Ask for a response to location information. Specifically, the response request unit 131 requests each base station 50 to urgently broadcast a telegram of a content for requesting the ship 20 within a predetermined distance from the shoreline to respond to the position information because an earthquake occurs. As an example of emergency broadcast contents, there are "Equence: 38 degrees XX minutes XX seconds north latitude 142 degrees YY minutes YY seconds east response, Request: Request a ship within 40 km from the land please let us know the location information" etc. .

  The emergency broadcast in the present embodiment is performed in a case where the epicenter is distant from the land (for example, the bottom of the seafloor) and it is predicted that a tsunami generated near the epicenter will reach the land from offshore.

  The response receiving unit 132 receives, from the ship 20 via wireless communication via the base station 50, the position information that the ship 20 has responded to the emergency broadcast. The response receiving unit 132 stores the position information received from each ship 20 in the management information storage unit 121 by adding the reception time and the identification information of the ship 20. By referring to this reception time, it is possible to determine whether it is the position information notified at a fixed time or the position information by the response after the emergency broadcast.

  The ship identification unit 133 acquires position information of each ship 20 that has responded to the emergency broadcast from the management information storage unit 121, and performs a ship identification process of specifying a predetermined ship located between the earthquake source and the coastline Details will be described later).

  The measurement request unit 134 requests each base station 50 to broadcast to the vessel 20 identified by the vessel identification unit 133, causes the identified vessel 20 to measure the sea level and position, and responds the measurement result Send a measurement request. Specifically, the measurement request unit 134 requests the base station 50 to broadcast a message including identification information indicating the specified ship 20 and the content of the measurement request. As an example of this broadcast content, there is "ship ID: when seas larger than the threshold value are received, the sea level information and position information are transmitted".

  The measurement information receiving unit 135 receives information (sea level information and position information) in which the ship 20 responds to the measurement request from the ship 20 by wireless communication via each base station 50. The measurement information receiving unit 135 stores the sea surface height information and the position information received from the ship 20 in the measurement information storage unit 122 with the reception time and the identification information of the ship 20 added thereto.

  The output unit 136 generates and outputs a sea information map based on the sea level information and the position information received from the ship 20. Specifically, the output unit 136 generates a sea information map based on the position information and the sea surface height information of the ship 20 stored in the measurement information storage unit 122. For example, based on the position and sea surface height information measured by the ship 20 at the time of emergency broadcast such as emergency earthquake bulletin or tsunami forecast, the output unit 136 is tsunami information MAP 41 to 43 applied to the tsunami (see FIGS. 7 and 8). Generate

  The output destination of the sea information map generated by the output unit 136 is, for example, a display device (not shown) of the information processing apparatus 100. Further, the output destination of the sea information map may be an external display device such as a display device (not shown) provided in the base station 50 connected via the communication unit 110.

  The control unit 130 may implement hardware-based data / certificate protection and a secure cryptographic processing environment by using the TCG technology by mounting the TPM chip described above. Thereby, the control unit 130 may verify the authenticity of the information and realize secure transmission of the information.

  For example, the TPM of the control unit 130 measures the software code in the boot process to the BIOS, the OSloader, and the OS kernel when the bound electronic device (for example, the information processing apparatus 100) starts up, and hashes the measured software code And register in the TPM internal register. Further, the TPM collects hardware information of the bound electronic device, hashes the hardware information, and registers the information in a register in the TPM.

  The application of the electronic device can access the functions of the TPM chip described above by using the interface provided by the TSS. The TPM chip secures the legitimacy of hash value collection by managing the hashing and signing rules for collecting the hash value with the TPM chip on the customer system side. Moreover, the TPM chip proves the non-falsification of the rules by checking the current rules and signatures as necessary. That is, the authenticity of the processing and information concerning the control unit 130 can be verified. As a result, the TPM chip ensures that there is no tampering with the rules for collecting the hash value by referring to the rules for which non-falsification has been proven on the TPM chip side.

  Also, the control unit 130 may insert the information hashed and signed by the TPM chip into the broadcast content. In this case, in the device (for example, the ship 20) that has received the broadcast content, the authenticity of the processing and information concerning the control unit 130 can be verified.

  Next, the operation of the information processing system 1 will be described. FIG. 4 is a ladder chart showing an operation example of the information processing system 1 according to the embodiment. In the following description, it is assumed that the initial operation of the ship 20 (mobile terminal 10) periodically transmits management information using the first mode.

  As shown in FIG. 4, when the response request unit 131 detects earthquake information after an emergency earthquake bulletin or tsunami forecast has been issued (S1), earthquake occurrence / location communication to each ship 20 with respect to each base station 50 is performed. Request the broadcast (emergency broadcast) of (S2). Each base station 50 that has received a request from the response request unit 131 wirelessly performs an emergency method of earthquake occurrence / location communication with each ship 20 (S3). Specifically, the base station 50 broadcasts a telegram having contents indicating the above-described emergency broadcast to each of the ships 20.

  The control unit 16 of the mobile terminal 10 refers to the message format 30 received from the base station 50, and determines the presence / absence of reception of the emergency broadcast of earthquake occurrence / location communication (S4). When the emergency broadcast is not received (S4: NO), the control unit 16 continues the operation of periodically transmitting the management information using the first mode.

  If the emergency broadcast is received (S4: YES), the control unit 16 switches to the second mode, and acquires the current position of the ship 20 from the positioning unit 13 (S5).

  Next, the control unit 16 obtains the distance of the ship 20 from the coastline based on the current position of the ship 20 and the map / nautical chart data stored in the storage unit 12. Next, the control unit 16 determines whether or not the distance of the ship 20 from the coastline is within the distance from the coastline where the location communication was instructed in the emergency broadcast, and determines whether or not to respond the location information. To do (S6).

  When responding (S6: YES), the control unit 16 causes the communication unit 11 to transmit the current position of the ship 20 (S7). When not responding (S6: NO), the control unit 16 skips S7 and advances the processing to S13 without transmitting the current position of the ship 20.

  When receiving the response of the current position from the ship 20 (S8), the base station 50 transmits information indicating the received current position and the reception sensitivity to the information processing apparatus 100. The response reception unit 132 of the information processing apparatus 100 stores the received information indicating the current position and the reception sensitivity in the management information storage unit 121 by adding the reception time and the identification information of the ship 20 on which the mobile terminal 10 is mounted ( S9).

  Next, the ship identification unit 133 performs a ship identification process for specifying a predetermined ship between the earthquake source and the coastline based on the position information of each ship 20 that has responded to the emergency broadcast (S10).

  FIG. 5 is a flowchart showing an example of the ship identification process. As shown in FIG. 5, when the process is started, the vessel identification unit 133 refers to the management information storage unit 121 and acquires position information of each vessel 20 that has responded to the emergency broadcast (S111) .

  Next, based on the position information of each ship 20 and the map / nautical chart data stored in the storage unit 120, the ship identification unit 133 determines each predetermined distance in the direction from the coastline to the epicenter (outward direction). The ships 20 are grouped into (S112). Specifically, the ship identification unit 133 groups the ships 20 by the distance toward the offshore, such as 0 to 10 km, 10 km to 20 km, and the like.

  FIG. 6 is an explanatory view for explaining the specification of the ship 20. As shown in FIG. In addition, in FIG. 6, the ship 20a displayed by meshing shows the ship identified by the ship identification process. Moreover, the ship 20b displayed in white indicates the ship not specified by the ship specifying process.

  As shown in FIG. 6, the ship identification unit 133 identifies a point P1 closest to the coastline C1 from the epicenter (130 km offshore) and where the arrival of the tsunami (first wave) directly arriving from the epicenter is assumed to be the earliest. Next, the ship identification unit 133 groups the ships 20 in units of 10 km in the direction heading offshore from the point P1. The ships 20 may be grouped similarly in the case of measuring the second and subsequent waves of the tsunami. For example, the vessel identification unit 133 identifies a point where the arrival of the second and subsequent waves is estimated to be earliest, and groups the vessels 20 in units of 10 km in a direction heading offshore from the identified point.

  Next, the ship identification unit 133 sets a thinning rate in each group for each distance from the shoreline toward the epicenter (S113). If all ships 20 between the epicenter and the coastline are requested to transmit the measurement results of the sea level and position, transmission from many ships 20 will be performed, which may cause congestion in wireless communication. Therefore, thinning is performed in each group for each distance from the coastline to the epicenter, and the thinning rate is set to request the ships after thinning to transmit the measurement results. As described above, by requesting the ships after thinning out of many ships 20 to transmit the measurement results, the occurrence of congestion in the wireless communication between the base station 50 and the ships 20 can be suppressed.

  The ship identification unit 133 sets a different value for each distance for the thinning rate of each group. Specifically, the ship identification unit 133 sets the thinning rate to a smaller value for a group closer to the earthquake source than a group close to the coastline, with a large distance from the shoreline to the epicenter. For example, the thinning rate of the group close to the epicenter is 0%, and the thinning rate is 10% and 20% as it gets closer to the coastline.

  Thereby, as shown in FIG. 6, the measurement result from many ships 20 can be expected from the position near the epicenter. Therefore, since it is possible to observe many changes in tide level that occurred near the epicenter, the prediction accuracy of the tsunami can be improved.

  Next, the ship identification unit 133 refers to the information indicating the reception sensitivity stored in the management information storage unit 121, and sorts the ships in each group in the order of reception sensitivity (S114). Specifically, the ship identification unit 133 sorts in order of high reception sensitivity (good reception sensitivity), and arranges a list of vessels to be specified in descending order of reception sensitivity. Thereby, it can specify in order from the ship 20 with a high reception sensitivity. As described above, by specifying the ship 20 having high reception sensitivity and requesting transmission of the measurement result, reception failure of the measurement result can be prevented in advance.

  Next, the ship identification unit 133 extracts the number of ships 20 that satisfy the thinning rate of each group from the top of the list of each group in which the ships 20 are sorted in descending order of reception sensitivity, and requests the measurement for each group. Are identified (S115). The ship identification unit 133 may randomly extract a number that satisfies the thinning rate from the ships 20 whose reception sensitivity is higher than a predetermined value in the sorted list.

  Returning to FIG. 4, next to S10, the measurement request unit 134 causes each base station 50 to measure the sea level and position of the vessel 20 identified by the vessel identification unit 133, and sends a measurement result as a response. Request for broadcasting (S11). Each of the base stations 50 that has received the request from the measurement request unit 134 wirelessly broadcasts a measurement request to make the specified ship 20 respond the measurement result (S12).

  At this time, the measurement request unit 134 may request a broadcast of a measurement request in which the measurement results are made to respond in order from the ship 20 specified from the group close to the epicenter. Thus, by broadcasting the measurement request preferentially to the ship 20 close to the epicenter, it is possible to quickly measure the tide level in the vicinity of the epicenter.

  The control unit 16 of the mobile terminal 10 refers to the message format 30 received from the base station 50, and determines the presence or absence of a measurement request based on the presence or absence of identification information of the ship 20 of itself (S13). When there is a measurement request (S13: YES), the control unit 16 acquires sensor information of the positioning unit 13 and the sea level detection unit 14 (S14).

  Next, the control unit 16 determines whether or not a tsunami (change in tide level) has been detected based on the sensor information (sea level information) acquired from the sea level detection unit 14 (S15).

  Specifically, the control unit 16 detects a sea surface uplift that is equal to or greater than a predetermined value corresponding to a tsunami and a time from the sea surface uplift to returning to the original sea level as a tsunami. When a tsunami is not detected (S15: NO), the control unit 16 returns the process to S14 and waits for the process.

  When the passage of the tsunami is detected (S15: YES), the control unit 16 causes the information on the current position and tide level change (sea level information) by the positioning unit 13 to be transmitted to the base station 50 as a measurement result (S16).

  When the base station 50 receives the response of the current position and tide level change information (sea level information) from the mobile terminal 10, the base station 50 transmits the received information to the information processing apparatus 100 (S17). The measurement information receiving unit 135 of the information processing apparatus 100 stores the received information in the measurement information storage unit 122 with the reception time and the identification information of the ship 20 on which the mobile terminal 10 is mounted.

  The output unit 136 of the information processing apparatus 100 creates and updates the tsunami information MAP based on the measurement results (position, sea surface height information) of the ship 20 stored in the measurement information storage unit 122, to a display device etc. It outputs (S18).

  7 and 8 are explanatory diagrams for explaining the tsunami information MAP. Specifically, FIG. 7 is a diagram illustrating tsunami information MAPs 41 and 42 for displaying a cross section of a tsunami for each distance. Moreover, FIG. 8 is a figure which illustrates tsunami information MAP43 which displays the bird's-eye view of the tsunami for every distance. As shown to FIG. 7,8, the information processing apparatus 100 produces and outputs tsunami information MAP41-43 based on the measurement result of the ship 20. As shown in FIG. Thus, the user can easily grasp the current status of the tsunami. In addition, the user can utilize the tsunami information MAP 41 to 43 for predicting the arrival time and the scale of the tsunami to the land.

  Further, each component of each unit shown in the drawings does not necessarily have to be physically configured as shown in the drawings. That is, the specific form of the dispersion and integration of each part is not limited to the illustrated one, and all or a part thereof is functionally or physically dispersed or integrated in any unit according to various loads, usage conditions, etc. Can be configured. For example, the positioning unit 13 and the sea level detection unit 14 may be integrated into one detection device. Further, the base station 50 and the information processing apparatus 100 may be one integrated apparatus. The illustrated processes are not limited to the above-described order, and may be performed at the same time as long as the process contents do not contradict each other, or the order may be changed.

  Furthermore, all or any part of various processing functions performed by each device may be executed on a CPU (or a microcomputer such as an MPU or an MCU (Micro Controller Unit)). In addition, various processing functions may be executed in whole or any part on a program analyzed and executed by a CPU (or a microcomputer such as an MPU or MCU) or on hardware by wired logic. It goes without saying that it is good.

  The various processes described in the above embodiments can be realized by executing a prepared program on a computer. So, below, an example of a computer which runs a program which has the same function as the above-mentioned example is explained. FIG. 9 is an explanatory diagram of an example of the computer 200 that executes the program 208a.

  As shown in FIG. 9, the computer 200 has a CPU 201 that executes various types of arithmetic processing, an input device 202 that receives data input, and a monitor 203. The computer 200 also includes a medium reading device 204 reading programs and the like from a storage medium, an interface device 205 for connecting with various devices, and a communication device 206 for connecting with other information processing devices and the like by wire or wirelessly. Have. The computer 200 also has a RAM 207 for temporarily storing various information, and a hard disk drive 208. Each of the devices 201 to 208 is connected to the bus 209.

  In the hard disk drive 208, a program 208a (a tide measurement program) having the same function as each functional unit of the information processing apparatus 100 shown in FIG. 1 is stored. The hard disk drive 208 also stores various data for realizing the program 208 a. The input device 202 receives an input of various information such as operation information from the user of the computer 200, for example. The monitor 203 displays various screens to the user of the computer 200, for example. The communication device 206 is connected to, for example, the base station 50 shown in FIG.

  The CPU 201 reads out each program including the program 208 a stored in the hard disk device 208, develops the program in the RAM 207, and executes the program to perform various processes. In addition, these programs can cause the computer 200 to function as each functional unit of the information processing apparatus 100 illustrated in FIG. 1.

  The program 208 a is not necessarily stored in the hard disk drive 208. For example, the computer 200 may read out and execute a program stored in a storage medium readable by the computer 200. The storage medium readable by the computer 200 corresponds to, for example, a CD-ROM, a DVD disk, a portable recording medium such as a USB (Universal Serial Bus) memory, a semiconductor memory such as a flash memory, a hard disk drive, or the like. Alternatively, the wireless communication program may be stored in a device connected to a public network, the Internet, a LAN, or the like, and the computer 200 may read out the wireless communication program from them and execute it.

DESCRIPTION OF SYMBOLS 1 ... Information processing system 10 ... Mobile terminal 11 ... Communications part 12 ... Storage part 13 ... Positioning part 14 ... Sea surface height detection part 15 ... Display operation part 16 ... Control part 20 ... Ship 30 ... Message format 41-43 ... Tsunami information MAP
50: Base station 51: Communication unit 52: Control unit 100: Information processing device 110: Communication unit 120: Storage unit 121: Management information storage unit 122: Measurement information storage unit 130: Control unit 131: Response request unit 132: Response reception Unit 133 ... ship identification unit 134 ... measurement request unit 135 ... measurement information reception unit 136 ... output unit 200 ... computer 201 ... CPU
208a ... program L ... ionospheric N ... network

Claims (8)

On the computer
Sending a response request to the ship to transmit the position information of the ship when the ship is located within a predetermined distance from the coastline,
When a response to the sent response request is received, the received position information of the ship is stored for each ship,
Based on the stored position information of the ship, a predetermined ship located between the epicenter and the coastline is identified;
Send a measurement request to the specified ship to measure the tide level and to transmit information including at least the magnitude of the change in tide level and the position at which the change in tide level is detected, when there is a change in predetermined tide level A tide level measurement program characterized by performing processing. The storing process stores the receiving sensitivity at the time of receiving the response for each ship.
The processing according to claim 1, characterized in that the vessel having high reception sensitivity is identified among the vessels located between the earthquake source and the coastline based on the stored reception sensitivity for each of the vessels. Measurement program. The tide level measurement program according to claim 1 or 2, wherein the identifying process identifies vessels decimated at a decimation rate according to a distance from the shoreline, with respect to the vessels located between the epicenter and the shoreline. The tide level measurement program according to any one of claims 1 to 3, wherein the transmission process transmits the measurement request from a ship close to the epicenter among the specified ships. Generate environment information for each device based on TPM (Trusted Platform Module),
5. The storage process according to any one of claims 1 to 4, wherein the process of storing stores the environment information in a predetermined memory, and the process of transmitting performs at least one of transmission including the environment information. The tide level measurement program according to one item. The computer is
Sending a response request to the ship to transmit the position information of the ship when the ship is located within a predetermined distance from the shoreline,
When a response to the sent response request is received, the received position information of the ship is stored for each ship,
Based on the stored position information of the ship, a predetermined ship located between the epicenter and the coastline is identified;
Send a measurement request to the specified ship to measure the tide level and to transmit information including at least the magnitude of the change in tide level and the position at which the change in tide level is detected, when there is a change in predetermined tide level A method of measuring a tide level characterized by performing a process. In a tide measurement system having a ship, a base station, and an information processing device,
The base station is
The vessel has a communication unit for transmitting a response request to transmit location information of the vessel when the vessel is located within a predetermined distance from the coastline,
The information processing apparatus is
When the base station receives a response to the sent response request, the storage unit stores the received ship position information for each ship;
An identifying unit for identifying a predetermined vessel located between the earthquake source and the coastline based on the stored positional information of the vessel;
The above-mentioned base is a measurement request for measuring the tide level of the specified ship, and transmitting information including at least the magnitude of the change in tide level and the position at which the change in tide level is detected when there is a change in predetermined tide level. And a request unit to be transmitted to a station. A storage unit that stores ship position information for each ship;
An identifying unit for identifying a predetermined vessel located between the earthquake source and the coastline based on the stored positional information of the vessel;
The base station requests a measurement to cause the identified ship to measure the tide level and to transmit information including at least the magnitude of the change in tide level and the position at which the change in tide level is detected when there is a change in predetermined tide level. An information processing apparatus characterized by:

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