JP6098102B2 - Communication terminal, communication method, and communication program - Google Patents

Description

  The present invention relates to a communication terminal, a communication method, and a communication program.

  Conventionally, the position of a user's communication terminal is specified using GPS (Global Positioning System). In this GPS, radio signals indicating time are transmitted from nearly 30 GPS satellites flying around the earth. Then, the ground communication terminal having the GPS receiver receives the radio signal, and the difference between the time at which the radio signal is transmitted from the GPS satellite and the time at which the radio signal is received by the communication terminal, Calculate the distance. The communication terminal performs this calculation for at least four GPS satellites, and specifies the position on the ground based on the calculation result.

  In recent years, GPS receivers have been miniaturized and have a power-saving structure, and GPS receivers have been built into small communication terminals driven by batteries such as mobile phones.

  However, there is a problem that GPS radio signals are difficult to reach indoor communication terminals. Therefore, a mechanism different from GPS is required for indoor positioning. In recent years, IMES (Indoor MEssaging System) has attracted attention as one of the other mechanisms.

  The distribution device that distributes radio signals using IMES can distribute radio signals in the same radio wave format as GPS satellites. Therefore, on the communication terminal side that receives the radio signals, the reception hardware is used as it is. There is an advantage that it is only necessary to finely modify the receiving software. Moreover, since the position information indicating the position of the IMES distribution apparatus is distributed instead of the time information indicating the time as the transmitted radio signal, the receiving communication terminal side receives the position information as it is, There is also an advantage that it is not necessary to perform complicated calculation of the time difference as in the case of outdoors.

  On the other hand, a technology for measuring the position and orientation of indoor pedestrians using sensors (acceleration, gyroscope, magnetism, temperature, pressure sensor, etc.) built in communication terminals. Is known (Patent Document 1). Such a technique is also called Pedestrian Dead Reckoing (PDR).

  A communication terminal having a built-in IMES receiver can acquire the current position in any place indoors by combining autonomous positioning by IMES and relative positioning by PDR technology. Since the relative position information acquired by relative positioning has a large error, it is assumed that the current position is corrected by the absolute position information acquired by IMES. However, since the positioning signal itself transmitted by IMES is also transmitted within a certain range, there may be a large error depending on the position of the communication terminal that receives the positioning signal.

  The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to use position information that appropriately represents the position of a communication terminal.

In order to solve the above problems, a communication terminal according to an embodiment of the present invention
A communication terminal that receives a positioning signal including the position information from a distribution device that distributes predetermined position information,
Calculating means for calculating position information representing the position of the communication terminal by relative positioning;
Measuring means for measuring the signal strength of the received positioning signal;
It said signal strength, and a predetermined signal strength threshold that is associated with the delivery position information of the distribution apparatus, on the basis of the position information indicating the current position of the communication terminal, is the position information of the calculation means has calculated Or determination means for determining whether the position information is included in the positioning signal;
Have

The communication method in one embodiment of the present invention is as follows.
A communication method executed by a communication terminal that receives a positioning signal including the position information from a distribution device that distributes predetermined position information,
A calculation stage for calculating position information representing the position of the communication terminal by relative positioning;
A measurement stage for measuring the signal strength of the received positioning signal;
It said signal strength, and a predetermined signal strength threshold associated with the position information to be distributed in the distribution device, based on the position information indicating the current position of the communication terminal, is the position information calculated in the calculating step Or a determination step of determining whether the position information is included in the positioning signal;
Have

  A communication program according to an embodiment of the present invention causes a computer to execute the communication method.

  As described above, the communication terminal according to the embodiment of the present invention can use position information that appropriately represents the position of the communication terminal.

It is a schematic diagram of the whole position management system concerning an embodiment of the present invention. It is an external appearance block diagram in case an electric equipment is a fluorescent lamp type LED lighting fixture. It is an image figure which shows the state which installed the communication terminal in the management target object. It is a hardware block diagram of the fixture main body in case an electric equipment is a LED lighting fixture. It is a hardware block diagram of the fluorescent lamp type LED lamp in case an electric equipment is an LED lighting fixture. It is a conceptual diagram of the positional information which a delivery apparatus delivers. It is a hardware block diagram of a communication terminal. It is a conceptual diagram of the format of the data of position information. It is a conceptual diagram which shows the data structure of the data containing position information. It is a hardware block diagram in case a managed object is a mobile telephone. It is a hardware block diagram of a gateway. It is a hardware block diagram of a positional information management system. It is a conceptual diagram of the management information which a positional information management system manages. It is a functional block diagram of a delivery apparatus and a communication terminal. It is a functional block diagram in case a managed object is a mobile telephone or a personal computer. It is a functional block diagram of a gateway and a location information management system. It is the sequence diagram which showed the process which builds a communication network of a ceiling. It is the sequence diagram which showed the process which delivers position information. It is the sequence diagram which showed the process which determines the delivery apparatus used as the transmission destination of a positional information while determining the positional information which a communication terminal uses. It is the flowchart which showed the process after a communication terminal receives position information until it memorize | stores. It is the image figure which showed the communication condition of a delivery apparatus and a communication terminal. It is the flowchart which showed the process which determines a transmission destination. It is the sequence diagram which showed the process which manages position information. It is the figure which showed the example of a screen in a positional information management system. It is the figure which showed the example of a screen in a positional information management system. It is the figure which showed the example of the expression method of a signal strength threshold value. It is a conceptual diagram of the signal strength threshold value information which the communication terminal in 1st Example manages. It is a functional block diagram of the communication terminal in 1st Example. It is the flowchart which showed the process in which the communication terminal in 1st Example determines the present position information. It is the flowchart which showed the process in which the communication terminal in 1st Example determines the present position information. It is a conceptual diagram of the delivery apparatus information which the positional information management system in 2nd Example manages. It is a functional block diagram of the positional information management system in 2nd Example. It is a functional block diagram of the communication terminal in 2nd Example. It is the flowchart which showed the process in which the communication terminal in 2nd Example determines the present position information. It is the sequence diagram which showed the inquiry process of the signal strength threshold value information in 2nd Example. It is the figure which showed the example of the frame structure which the delivery apparatus in 3rd Example transmits. It is the figure which showed the example of the frame structure which the delivery apparatus in 3rd Example transmits. It is the figure which showed the example of the frame structure which the delivery apparatus in 3rd Example transmits. It is a functional block diagram of the delivery apparatus in 3rd Example. It is a functional block diagram of the communication terminal in 3rd Example. It is the flowchart which showed the process in which the communication terminal in 3rd Example determines the present position information. It is the figure which showed the example of the element of the frame structure defined by IMES.

  The embodiment of the present invention will be described below with reference to FIGS.

  First, the outline of the present embodiment will be described with reference to FIG. FIG. 1 is a schematic diagram of the entire location management system according to the embodiment of the present invention.

  As shown in FIG. 1, the position management system 1 of the present embodiment includes a plurality of distribution devices (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h) on the ceiling β side of the indoor α, It is constructed by a plurality of communication terminals (5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h) on the floor side of the indoor α and the position information management system 9.

  Further, each distribution device (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h) indicates a position where each distribution apparatus is installed (which means "installed position" after each installation). Position information (Xa, Xb, Xc, Xd, Xe, Xf, Xg, Xh) is stored, and each position information (Xa, Xb, Xc, Xd, Xe, Xf, Xg, Xh) is distributed. Further, each distribution device (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h) has device identification information (Ba, Bb, Bc, Bd, Be, Bf, Bg, Bh) for identifying each. Is remembered.

  Hereinafter, an arbitrary distribution device among the plurality of distribution devices is referred to as “distribution device 3”, and an arbitrary communication terminal among the plurality of communication terminals is referred to as “communication terminal 5”. In addition, arbitrary position information among a plurality of pieces of position information is indicated as “position information X”, and among the plurality of pieces of apparatus identification information, arbitrary apparatus identification information is indicated as “apparatus identification information B”. The device identification information B includes a MAC (Media Access Control) address.

  On the other hand, each communication terminal (5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h) has terminal identification information (Aa, Ab, Ac, Ad, Ae, Af, Ag, Ah) for identifying each. Is remembered. Note that arbitrary terminal identification information among a plurality of terminal identification information is indicated as “terminal identification information A”. The terminal identification information A includes a MAC address. When each communication terminal 5 receives the position information X from the distribution device 3, it transmits the position information X together with its own terminal identification information A to the distribution device 3.

  In addition, each distribution device 3 is built in an electric device (2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h) installed on the ceiling β of the indoor α or attached to each of these external devices. ing. Hereinafter, an arbitrary electric device among the plurality of electric devices is referred to as “electric device 2”.

  Each electric device 2 supplies power to each distribution device 3. Among these, the electric equipment 2a is a fluorescent lamp type LED (Light Emitting Diode) lighting fixture. The electric device 2b is a ventilation fan. The electric device 2c is an access point for a wireless local area network (LAN). The electric device 2d is a speaker. The electric device 2e is an emergency light. The electric device 2f is a fire alarm or a smoke alarm. The electric device 2g is a surveillance camera. The electric device 2h is an air conditioner.

  Each electrical device 2 may be other than the one shown in FIG. 1 as long as it can supply power to each distribution device 3. For example, in addition to the example of the electric device 2, a general fluorescent or incandescent lighting fixture that is not an LED, a security sensor that detects an intruder from the outside, and the like can be given.

  On the other hand, each communication terminal 5 is attached to the outside of the management object (4a, 4b, 4c, 4d, 4e) whose position is managed by the position information management system 9, respectively.

  Among these, the management target 4a is a bag. The management object 4b is a table. The managed object 4c is a projector. The managed object 4d is a video conference terminal. The management target 4e is an MFP (Multi Function Product) including a copy function. The management object 4f is a broom.

  Moreover, since the management target 4g is a personal computer and the function of the communication terminal 5 is installed in the personal computer, it is also the communication terminal 5g in this case. Furthermore, the management target 4h is a mobile phone such as a smartphone, and since the function of the communication terminal 5 is installed in the mobile phone, it is also the communication terminal 5h in this case. Hereinafter, an arbitrary management object among the plurality of management objects will be referred to as “management object 4”.

  Further, each management object 4 may be other than the object shown in FIG. For example, as other examples of the management object 4, a facsimile machine, a scanner, a printer, a copier, an electronic blackboard, an air cleaner, a shredder, a vending machine, a wristwatch, a camera, a game machine, a wheelchair, an endoscope, etc. Medical equipment.

  Next, an outline of an example of a location information management method using the location management system 1 will be described. In the present embodiment, for example, the distribution device 3a installed on the ceiling β of the indoor α distributes position information Xa indicating the position where the distribution device 3a is installed by wireless communication. Thereby, the communication terminal 5a receives the position information Xa. Next, the communication terminal 5a transmits terminal identification information Aa and position information Xa for identifying the communication terminal 5a to the distribution device 3a by wireless communication. In this case, the communication terminal 5a sends back the position information Xa received from the distribution device 3a to the distribution device 3a.

  Thereby, the distribution apparatus 3a receives the terminal identification information Aa and the position information Xa. Next, the distribution device 3a transmits the terminal identification information Aa and the position information Xa to the gateway 7 by wireless communication. Then, the gateway 7 transmits the terminal identification information Aa and the position information Xa to the position information management system 9 via the LAN 8e. In the position information management system 9, by managing the terminal identification information Aa and the position information Xa, the administrator of the position information management system 9 can grasp the position of the communication terminal 5a (managed object 4a) in the indoor α. it can.

  Further, among the communication terminals 5, particularly the communication terminals (5g, 5h), as shown in FIG. 1, in the outdoor γ, a radio signal (time information, orbit information, etc.) is transmitted from a GPS (Global Positioning System) satellite 999. And the position on the earth can be calculated. Then, the communication terminals (5g, 5h) use a mobile communication system such as 3G (3rd Generation), 4G (4th generation), etc., to make a base station 8a, a mobile communication network 8b, a gateway 8c, the Internet 8d, and a LAN 8e. The terminal identification information (Ag, Ah) and the position information (Xg, Xh) for identifying each of the communication terminals (5g, 5h) can be transmitted to the position information management system 9 via.

  A communication network 8 is constructed by the base station 8a, the mobile communication network 8b, the gateway 8c, the Internet 8d, the LAN 8e, and the gateway 7. In addition, in order to measure the latitude and longitude on the earth, at least three GPS satellites are required (four are required when the altitude is included). Show.

  Next, as an example of the electric device 2, an external configuration of the electric device 2a as a fluorescent lamp type LED lighting apparatus will be described with reference to FIG. In addition, FIG. 2 is an external appearance block diagram in case an electric equipment is a fluorescent lamp type LED lighting fixture.

  As shown in FIG. 2, the electric apparatus 2a as a fluorescent lamp type LED lighting fixture is a straight tube type lamp, and the apparatus main body 120 attached to the ceiling β of the indoor α shown in FIG. The LED lamp 130 is attached to the apparatus main body 120.

  A socket 121a and a socket 121b are provided at both ends of the apparatus main body 120, respectively. Among these, the socket 121a has power supply terminals (124a1, 124a2) for supplying power to the LED lamp 130. The socket 121b also has power supply terminals (124b1, 124b2) for supplying power to the LED lamp 130. As a result, the apparatus main body 120 can supply power from the power supply 1000 described later to the LED lamp 130.

  On the other hand, the LED lamp 130 includes a translucent cover 131, caps (132 a and 132 b) provided at both ends of the translucent cover 131, and a distribution device 3 a inside the translucent cover 131. Among these, the translucent cover 131 is formed, for example with resin materials, such as an acrylic resin, and is provided so that an internal light source may be covered.

  Further, the base 132a is provided with terminal pins (152a1, 152a2) connected to the power supply terminals (124a1, 124a2) of the socket 121a, respectively. The base 132b is provided with terminal pins (152b1, 152b2) connected to the power supply terminals (124b1, 124b2) of the socket 121b, respectively. Then, the LED lamp 130 is attached to the apparatus main body 120, so that each terminal pin (152a1, 152a2, 152b1, 152b2) is connected to the apparatus main body 120 via the power supply terminals (124a1, 124a2, 124b1, 124b2). Electric power can be supplied. Thereby, the LED lamp 130 irradiates light to the outside through the translucent cover 131. Further, the distribution device 3a operates with power supplied from the device main body 120.

  Next, a state in which the communication terminal 5b is placed on the upper surface of the management target 4b as a table will be described as an example of the management target 4 with reference to FIG. FIG. 3 is an image diagram illustrating a state in which a communication terminal is installed on the management target.

  As shown in FIG. 3, the communication terminal 5b is attached to the upper surface of the management object 4b. For example, the communication terminal 5b can be attached to the management object 4b by double-sided tape, but it may be simply placed on the management object 4c.

  Subsequently, a hardware configuration in the case where the electric apparatus is an LED lighting apparatus will be described with reference to FIGS. 4 and 5. FIG. 4 is a hardware configuration diagram of the fixture body when the electrical device is an LED lighting fixture. FIG. 5 is a hardware configuration diagram of a fluorescent lamp type LED lamp when the electric device is an LED lighting apparatus.

  As shown in FIG. 4, the apparatus main body 120 is mainly configured by a ballast 122, lead wires (123a, 123b), and power supply terminals (124a1, 124a2, 124b1, 124b2).

  Among these, the ballast 122 controls the current supplied from the external power supply 1000. The ballast 122 and the power supply terminals (124a1, 124a2, 124b1, 124b2) are electrically connected by lead wires (123a, 123b). As a result, stable power can be supplied from the ballast 122 to the power supply terminals (124a1, 124a2, 124b1, 124b2) via the lead wires (123a, 123b).

  As shown in FIG. 5, the LED lamp 130 mainly includes a power control unit 140, lead wires (151a, 151b), terminal pins (152a1, 152a2, 152b1, 152b2), lead wires 153, leads. It is comprised by the wire | line 154, the lead wire 155, and the delivery apparatus 3a. Among these, the power supply control unit 140 controls a current output from the power supply 1000 and is mainly configured by a current monitoring circuit 141 and a smoothing circuit 142. The current monitoring circuit 141 receives the current output from the power supply 1000 and rectifies it. The smoothing circuit 142 smoothes the current rectified by the current monitoring circuit 141 and supplies power to each terminal pin (152a1, 152a2, 152b1, 152b2) via the lead wires (151a, 151b).

  Further, the power supply control unit 140 and the terminal pins (152a1, 152a2, 152b1, 152b2) are electrically connected by lead wires (151a, 151b). The power control unit 140 and the distribution device 3a are electrically connected by a lead wire 154. Note that only one LED 160 is shown in FIG. 5 because of the area of the paper surface, but a plurality of LEDs are actually attached. Moreover, the structure shown in FIG. 5 is the same as that of a general LED lamp except for the distribution device 3a.

  Next, the distribution device 3a will be described. The distribution device 3a includes a voltage converter 100, a lead wire 155, a control unit 11, a position information distribution unit 12, and a wireless communication unit 13. The voltage converter 100 is electrically connected to the control unit 11, the position information distribution unit 12, and the wireless communication unit 13 via the lead wire 155.

  Among these, the voltage converter 100 converts the voltage of the electric power supplied from the power supply control unit 140 into a driving voltage of the distribution device 3 a and supplies the converted voltage to the control unit 11, the position information distribution unit 12, and the wireless communication unit 13. It is an electronic component.

  The control unit 11 includes a CPU (Central Processing Unit) 101 that controls the operation of the entire control unit 11, a ROM (Read Only Memory) 102 that stores basic input / output programs, and a RAM (Random) that is used as a work area for the CPU 101. Access Memory) 103, I / F (108a, 108b) for transmitting / receiving signals to / from the position information distribution unit 12 and the wireless communication unit 13, and an address bus, a data bus, etc. for electrically connecting the above units A bus line 109 is provided.

  The position information distribution unit 12 includes a CPU 201 that controls the operation of the entire position information distribution unit 12, a ROM 202 that stores basic input / output programs and position information Xa, a communication circuit 204 that distributes the position information Xa, an antenna 204a, and a control unit. 11, an I / F 208 for transmitting and receiving signals to and from the bus, and a bus line 209 such as an address bus and a data bus for electrically connecting the above-described units.

  Among these, the communication circuit 204 uses IMES which is one of indoor positioning techniques called indoor GPS, and distributes the positional information Xa by the antenna 204a. In FIG. 1, the reachable range (distributable range) of the position information X is virtually represented by a broken line. In the IMES of this embodiment, when the ceiling height of the indoor α is about 3 m, the transmission output is set so that the radius of the reachable virtual circle of the position information X represented on the floor of the indoor α is about 5 m. Is done. However, if this transmission output setting is changed, it can be made smaller than 5 m, and can be made larger.

  The position information Xa indicates the position where the electric device 2a, which is a fluorescent lamp type LED lighting apparatus, is installed, and includes items of floor number, latitude, longitude, and building number as shown in FIG. FIG. 6 is a conceptual diagram of position information distributed by the distribution apparatus.

  Of these, the number of floors represents the number of floors of the building in which the electrical equipment 2a is installed. The latitude and longitude represent the latitude and longitude of the position where the electric device 2a is installed. The building number represents the building number of the building where the electrical equipment 2a is installed. In the example shown in FIG. 6, it is shown that the electrical equipment 2a is installed on the 16th floor of a building C, at a latitude of 35.459555 degrees north latitude and 139.387110 degrees longitude longitude. Has been. The latitude may be represented by the south latitude and the longitude may be represented by the west longitude.

  Returning to FIG. 5, the wireless communication unit 13 includes a CPU 301 that controls the operation of the entire wireless communication unit 13, a ROM 302 that stores basic input / output programs and device identification information Ba, and a RAM 303 that is used as a work area for the CPU 301. The communication circuit 304 and the antenna 304a that receive the position information Xa and the terminal identification information Aa and transmit them to the gateway 7, the I / F 308 that transmits and receives signals to and from the control unit 11, and the addresses for electrically connecting the above-described units A bus line 309 such as a bus or a data bus is provided.

  The wireless communication unit 13 transmits and receives data using the 920 MHz band. Since the radio wave reachability of the 920 MHz band is high, data can be transmitted from the distribution device 3a to the gateway 7 even when a pillar or wall of a building exists between the distribution device 3a and the gateway 7. There is an effect that can be done.

  Further, the communication circuit 304 uses at least the physical layer (layer) standard among the IEEE802.15.4 standard architecture model, and transmits and receives data by the antenna 304a. In this case, a MAC address can be used as the device identification information B for identifying the distribution device 3 (wireless communication unit 13).

  Note that ZigBee (registered trademark) that employs the physical layer and the MAC layer in the architecture model of the IEEE802.15.4 standard may be used. In this case, the distribution device 3 uses the 800 MHz band, the 900 MHz band, or the 2.4 GHz band according to the usage region such as Japan, the United States, and Europe, and passes through the other distribution devices 3 adjacent to the gateway 7. Can send data to. If multi-hop communication that transmits data via another distribution device 3 is used in this way, the wireless communication unit 13 of each distribution device 3 takes time for the routing process, but data is transmitted to the nearest distribution device 3. Therefore, there is an advantage that it can be driven with power saving.

  Further, the position information Xa may be stored in the storage unit 29 by the manufacturer before the delivery apparatus 3a is shipped from the factory, or when the electric device 2a is installed on the ceiling β after the delivery apparatus 3a is shipped from the factory. May be stored. Further, the positional information Xa is received by the communication circuit 304 of the wireless communication unit 13 from an external device such as the positional information management system 9 by wireless communication via the gateway 7, and the positional information distribution unit via the control unit 11. It may be stored in the 12 ROMs 202.

  Next, the hardware configuration of the communication terminal 5 will be described with reference to FIG. FIG. 7 is a hardware configuration diagram of the communication terminal.

  As shown in FIG. 7, the communication terminal 5 includes a control unit 14 and a wireless communication unit 15.

  Among them, the control unit 14 includes a CPU 401 that controls the operation of the entire control unit 14, a ROM 402 that stores basic input / output programs, a RAM 403 that is used as a work area of the CPU 401, a communication circuit 404 that receives position information X, and an antenna 404a. , An acceleration sensor 405 that detects acceleration, an I / F 408 that transmits and receives signals to and from the wireless communication unit 15, and a bus line 409 such as an address bus and a data bus for electrically connecting the respective units. The control unit 14 is also provided with a button battery 406 and is driven by the button battery 406. In the present embodiment, the case where the button battery 406 is used will be described. However, the battery is not limited to the button type, and may be a dry battery such as AA, AAA, or a battery dedicated to the communication terminal 5.

  The communication circuit 404 receives the position information X distributed using IMES by the antenna 404a. Further, the control unit 14 supplies power of the button battery 406 to the wireless communication unit 15 via the connector 409a. Furthermore, the control unit 14 transmits and receives data (signals) to and from the wireless communication unit 15 via the connector 409b from the I / F 408.

  The acceleration sensor 405 detects a change in acceleration of the communication terminal 5. The change in acceleration is detected, for example, when the communication terminal 5 starts moving, when the communication terminal 5 stops moving, or when the communication terminal 5 tilts. When the process of the CPU 401 is stopped, when the acceleration sensor 405 detects a change in acceleration, the CPU 401 transmits a signal for starting the process to the CPU 401. As a result, the CPU 401 starts its own process and transmits a signal for starting the process to the communication circuit 404. Therefore, when the position information X is distributed from the distribution device 3, the communication circuit 404 of the communication terminal 5 can start receiving the position information X via the antenna 404a.

  On the other hand, the wireless communication unit 15 basically has the same configuration as the wireless communication unit 13 and transmits / receives data to / from the wireless communication unit 13 of the distribution device 3 using the same band as the wireless communication unit 13. Can do. As shown in FIG. 7, the wireless communication unit 15 is used as a work area for the CPU 501 that controls the overall operation of the wireless communication unit 15, the ROM 502 that stores the basic input / output program and the terminal identification information A, and the CPU 501. RAM 503, communication circuit 504 and antenna 504a for transmitting position information X and terminal identification information A, I / F 508 for transmitting and receiving signals to and from the control unit 14, and an address bus for electrically connecting the above units, A bus line 509 such as a data bus is provided. Note that the radio communication unit 15 may also use ZigBee.

  Further, the communication circuit 504 acquires the position information X stored in the RAM 403 of the control unit 14 via the connector 409b in accordance with a command from the CPU 501. Further, the communication circuit 504 reads the terminal identification information A stored in the ROM 502 and transmits it together with the acquired position information X to the distribution device 3 via the antenna 504a.

  Further, the data of the position information X transmitted by the communication circuit 504 has a format as shown in FIG. FIG. 8 is a conceptual diagram of a format of position information data. In the example of FIG. 8, the floor, latitude, longitude, and building number fields are represented by 9 bits, 21 bits, 21 bits, and 8 bits, respectively, and the representation format of each field conforms to the IMES standard. Actually, in addition to this format, headers and checksum information defined by the communication method are added, and as shown in FIG. 9, the transmission destination, transmission source, and data contents (position information X, etc.) It is included. FIG. 9 is a conceptual diagram showing a data structure of data including position information.

  Next, a hardware configuration of a mobile phone that is the management target 4h (communication terminal 5h) will be described with reference to FIG. FIG. 10 is a hardware configuration diagram when the management target is a mobile phone.

  As shown in FIG. 10, the management object 4h (communication terminal 5h) includes a CPU 601 that controls the operation of the entire communication terminal 5h, a ROM (Read Only Memory) 602 that stores basic input / output programs, and a work of the CPU 601. A RAM 603 used as an area, an EEPROM (Electrically Erasable and Programmable ROM) 604 that reads and writes data according to the control of the CPU 601, and a CMOS (Complementary Metal Oxide Semiconductor) sensor 605 that captures an image of the subject and obtains image data under the control of the CPU 601. , An electronic magnetic compass for detecting geomagnetism, a gyrocompass, various acceleration / direction sensors 606 such as an acceleration sensor, and a media drive 608 for controlling reading / writing (storage) of data to / from a recording medium 607 such as a flash memory.Then, under the control of the media drive 608, the recording medium 607 in which the already recorded data is read or the data is newly written and stored is detachable.

  The EEPROM 604 stores an operating system (OS) executed by the CPU 601, other programs, and various data. The CMOS sensor 605 is a charge-coupled device that converts light into electric charges and digitizes the image of the subject. If the subject can be imaged, the CMOS sensor 605 is not limited to the CMOS sensor but is a CCD (Charge Coupled Device) sensor. May be.

  Furthermore, the management object 4h (communication terminal 5h) includes a voice input unit 611 that converts voice into a voice signal, a voice output unit 612 that converts voice signal into voice, an antenna 613a, and a wireless communication signal using the antenna 613a. , A communication unit 613 that communicates with the nearest base station 8a, a GPS reception unit 614 that receives a GPS signal from a GPS satellite 999, a display 615 such as a liquid crystal or organic EL that displays an image of a subject, various icons, and the like, and this display Touch panel 616 that is mounted on 615 and configured by a pressure-sensitive or electrostatic panel and detects a touch position on display 615 by touching with a finger, a touch pen, or the like, and an address for electrically connecting the above-described units A bus line 610 such as a bus or a data bus is provided. The management object 4h (communication terminal 5h) is also provided with a dedicated battery 617, and is driven by the battery 617. Note that the voice input unit 611 includes a microphone that inputs voice, and the voice output unit 612 includes a speaker that outputs voice.

  Further, the GPS receiving unit 614 of the management object 4h (communication terminal 5h) is the same as the GPS receiving unit of a general mobile phone. However, the firmware in the program stored in the ROM 602 is finely adjusted, and data can be received seamlessly from the indoor α distribution device 3 and the outdoor γ GPS satellite. The acceleration / orientation sensor 606 functions including the processing of the acceleration sensor 605 in FIG.

  The hardware configuration of the personal computer that is the management object 4g (communication terminal 5g) is basically the same as that of the location information management system 9 shown in FIG. However, in the case of a personal computer that is the management target 4g (communication terminal 5g), a GPS antenna is connected to an external device I / F 916 such as a USB (Universal Serial Bus) connector shown in FIG. Some personal computers are equipped with a GPS antenna. In this case, it is not necessary to connect the GPS antenna to the external device I / F 916.

  Next, the hardware configuration of the gateway 7 will be described with reference to FIG. FIG. 11 is a hardware configuration diagram of the gateway.

  As illustrated in FIG. 11, the gateway 7 includes a wireless communication unit 17 and a wired communication unit 18.

  Among these, the wireless communication unit 17 has basically the same configuration as the wireless communication unit 13 and transmits / receives data to / from the wireless communication unit 13 of the distribution device 3 using the same band as the wireless communication unit 13. be able to. As shown in FIG. 11, the wireless communication unit 17 is used as a work area for the CPU 701 that controls the overall operation of the wireless communication unit 17, the ROM 702 that stores basic input / output programs and device identification information C, and the CPU 701. RAM 703, communication circuit 704 for transmitting position information X and the like, antenna 704a, I / F 708 for transmitting / receiving signals to / from wired communication unit 18, and buses such as an address bus and a data bus for electrically connecting the above-described units A line 709 is provided. The wireless communication unit 17 transmits and receives signals to and from the wired communication unit 18 via the connector 709a from the I / F 708.

  Note that the radio communication unit 17 may also use ZigBee. The device identification information C is unique information for identifying the gateway 7 (wireless communication unit 17). Examples of the device identification information C include a MAC address.

  On the other hand, as shown in FIG. 11, the wired communication unit 18 is used as a work area for the CPU 801 that controls the operation of the entire wired communication unit 18, the ROM 802 that stores basic input / output programs and device identification information D, and the CPU 801. RAM 803, Ethernet controller 805, I / F 808 a that transmits / receives signals to / from the wireless communication unit 17, I / F 808 b that transmits / receives data (signals) to / from the LAN 8 e via the cable 809, and the above components are electrically connected For this purpose, a bus line 809 such as an address bus or a data bus is provided.

  Here, the CPU 801 and the Ethernet controller 805 convert the communication method (communication protocol) compliant with IEEE802.15.4 to the communication method (communication protocol) compliant with IEEE802.3, and are sent from the distribution device 3. Various data (information) is controlled so that Ethernet (registered trademark) packet communication can be performed.

  Furthermore, the device identification information D is unique information for identifying the gateway 7 (wired communication unit 18). Examples of the device identification information D include an IP (Internet Protocol Address) address. Note that the ROM 802 also stores a MAC address, but a description thereof is omitted to simplify the communication with the location information management system 9.

  Next, the hardware configuration of the location information management system 9 will be described with reference to FIG. FIG. 12 is a hardware configuration diagram of the location information management system.

  The location information management system 9 is configured by a computer. The location information management system 9 is used as a work area for the CPU 901 that controls the overall operation of the location information management system 9, a ROM 902 that stores programs used to drive the CPU 901 such as an IPL (Initial Program Loader), and the CPU 901. RAM 903, HD 904 for storing various data such as programs for the position information management system 9 and system identification information E, HDD (Hard Disk Drive) 905 for controlling reading or writing of various data to the HD 904 according to the control of the CPU 901, flash memory A media drive 907 for controlling reading or writing (storage) of data with respect to the recording medium 906, a display 908 for displaying various information such as a cursor, a menu, a window, a character, or an image, a communication network Network I / F 909 for data communication using a computer, a keyboard 911 having a plurality of keys for inputting characters, numerical values, various instructions, selection and execution of various instructions, selection of a processing target, movement of a cursor A CD-ROM drive 914 that controls reading or writing of various data to a CD-ROM (Compact Disc Read Only Memory) 913 as an example of a removable recording medium, a communication circuit 915 that performs wireless communication, and the like An antenna 915a, an external device I / F 916 for connecting an external device, and a bus line 910 such as an address bus and a data bus for electrically connecting the above components are provided.

  Further, the system identification information E is unique information for identifying the position information management system 9. An example of the system identification information E is an IP address. The ROM 902 also stores a MAC address, but a description thereof will be omitted to simplify the communication with the gateway 7.

  Further, the HD 904 manages management information F as shown in FIG. 13 and layout information G such as a specific floor as shown in FIG. FIG. 13 is a conceptual diagram of management information managed by the location information management system.

  As illustrated in FIG. 13, the management information F is information in which terminal identification information A, a device name, an owner name (administrator name), position information X, and various types of information such as reception date and time are associated.

  Among these, the terminal identification information A is information for identifying the communication terminal 5 as described above. The device name is the name of the management object 4 or the name of the communication terminal 5. The owner name (manager name) is the name of the owner or manager of the communication terminal 5. The position information X is information shown in FIG. The reception date and time is the reception date and time when the position information management system 9 receives the position information X and the like from the gateway 7.

  The terminal identification information A, the device name, and the owner name (administrator name) are managed in advance in association with the location information management system 9. The location information management system 9 receives the location information X and the terminal identification information A from the gateway 7, thereby adding the location information X and the reception date and time to the record portion including the same terminal identification information A in the management information F.

  Further, when the location information management system 9 has already managed the location information X and the reception date and time and newly received the location information X and the terminal identification information A from the gateway 7, the location information management system 9 already manages the location information. The information X and the reception date and time are overwritten.

  The position information management system 9 may create a new record and perform additional writing without overwriting the position information X and the reception date and time.

  Next, the functional configuration of the location management system 1 according to the present embodiment will be described with reference to FIGS. 14 to 16. When the functional configuration is described with reference to FIGS. 14 to 16, the relationship with the hardware configuration shown in FIGS. 5, 7, 10, 11, and 12 will be briefly described.

  FIG. 14 is a functional block diagram of the distribution device and the communication terminal. As illustrated in FIG. 14, the distribution device 3 includes a conversion unit 10, a distribution control unit 20, and a wireless communication control unit 30 as functions or means. Among these, the conversion part 10 is a function or means implement | achieved when the voltage converter 100 shown by FIG. 5 operate | moves.

  The distribution control unit 20 is a function or means realized by the operation of the control unit 11 and the position information distribution unit 12 illustrated in FIG. Furthermore, the wireless communication control unit 30 is a function or means realized by the operation of the control unit 11 and the wireless communication unit 13 illustrated in FIG.

  The distribution control unit 20 has a storage unit 29 constructed by the ROM 202 shown in FIG. The storage unit 29 stores the position information X described above. Further, the distribution control unit 20 includes a distribution unit 21, a communication unit 27, and a storage / reading unit 28.

  Among these, the distribution unit 21 is realized mainly by the processing of the CPU 201 and the communication circuit 204 illustrated in FIG. 5, and distributes the position information X within a distributable range.

  The communication unit 27 is mainly realized by the processing of the CPU (101, 201) shown in FIG. 5 and the I / F (108a, 208) and the bus (109, 209). Data (signal) communication with.

  The storage / reading unit 28 is realized by processing of the CPU (101, 201), stores various data in the storage unit 29, and reads out various data from the storage unit 29. For example, the storage / reading unit 28 stores and reads data of the position information X.

  Further, the wireless communication control unit 30 has a storage unit 39 constructed by the RAM 303 shown in FIG. The storage unit 39 stores the device identification information B described above.

  The transmission / reception unit 31 is realized mainly by the processing of the CPU 301 and the communication circuit 304 shown in FIG. 5, and transmits and receives various data to and from the communication terminal 5 or the gateway 7 by wireless communication.

  The communication unit 37 is realized mainly by the processing of the CPU (101, 301) and the I / F (108B, 308) and the bus (109, 309), and performs data (signal) communication with the distribution control unit 20. .

  The storage / reading unit 38 stores various data in the storage unit 39 and reads various data from the storage unit 39.

  Next, the functional configuration of the communication terminal 5 will be described.

  The communication terminal 5 includes a reception control unit 40 and a wireless communication control unit 50 as functions or means.

  The reception control unit 40 has a storage unit 49 constructed by the RAM 403 shown in FIG. The storage unit 49 can store the position information X distributed from the distribution device 3. Further, the reception control unit 40 includes a reception unit 41, a detection unit 42, a determination unit 43, a measurement unit 44, a communication unit 47, and a storage / readout unit 48.

  Among these, the receiving unit 41 is mainly realized by the processing of the CPU 401 and the communication circuit 404 illustrated in FIG. 7, and receives the position information X distributed from the distribution device 3. In addition, the receiving unit 41 may be able to receive the position information X or may not be able to receive the position information X.

  The detection unit 42 is realized mainly by the processing of the CPU 401 and the acceleration sensor 405 illustrated in FIG. 7, detects the movement (including tilt) of the communication terminal 5, and causes the reception unit 41 to start the processing. Note that the detection unit 42 may be realized by a motion sensor using inertial force or magnetism instead of the acceleration sensor 405.

  The determination unit 43 is realized mainly by the processing of the CPU 401 illustrated in FIG. 7, and determines whether or not the reception unit 41 has received at least one piece of position information X. Further, the determination unit 43 determines whether the reception unit 41 has received the respective position information X from the plurality of distribution devices 3. In this case, the position information X distributed from the same distribution device 3 is treated as one no matter how many times it is received within a predetermined time described later.

  The measurement unit 44 is mainly realized by the processing of the CPU 401 illustrated in FIG. 7, and when the determination unit 43 determines that each position information X has been received from the plurality of distribution devices 3, The signal intensity relating to each position information X is measured.

  The communication unit 47 is mainly realized by the processing of the CPU 401 shown in FIG. 7, the I / F 408 and the bus 409, and performs data (signal) communication with the wireless communication control unit 50.

  The storage / reading unit 48 is realized by processing of the CPU 401, stores various data in the storage unit 49, and reads various data from the storage unit 49. For example, the storage / extraction unit 48 stores and reads out the data of the position information X.

  The wireless communication control unit 50 includes a storage unit 59 constructed by the RAM 503 shown in FIG. The storage unit 59 stores the terminal identification information A described above. The wireless communication control unit 50 further includes a transmission / reception unit 51, a determination unit 53, a measurement unit 54, a communication unit 57, and a storage / reading unit 58.

  The transmission / reception unit 51 is realized mainly by the processing of the CPU 501 and the communication circuit 504 illustrated in FIG. 7, and transmits / receives various data to / from the distribution device 3 through wireless communication.

  The determination unit 53 is realized mainly by the processing of the CPU 501 illustrated in FIG. 7, and determines whether the reception unit 51 has received at least one device identification information B. Further, the determination unit 53 determines whether the reception unit 51 has received the respective device identification information B from the plurality of distribution devices 3. In this case, the device identification information B transmitted from the same distribution device 3 is treated as one no matter how many times it is received within a predetermined time described later.

  The measurement unit 54 is realized mainly by the processing of the CPU 501 shown in FIG. 7, and when the determination unit 53 determines that each device identification information B has been received from the plurality of distribution devices 3. Then, the signal intensity related to each device identification information B is measured.

  The communication unit 57 is realized mainly by the processing of the CPU 501 shown in FIG. 7, the I / F 508 and the bus 509, and performs data (signal) communication with the reception control unit 40.

  The storage / reading unit 58 is realized mainly by the processing of the CPU 501 shown in FIG. 7, stores various data in the storage unit 59, and reads out various data from the storage unit 59. For example, the storage / extraction unit 58 stores and reads data of the device identification information (A, B).

  Next, the functional configuration in the case of the management object (4g, 4h) will be described with reference to FIG. FIG. 15 is a functional block diagram when the management target is a mobile phone or a personal computer.

  As shown in FIG. 15, the management object (4g, 4h) is stored in the EEPROM 604 shown in FIG. 10 or the RAM 903 and HD (Hard Disk) 904 shown in FIG. A portion 69 is provided. Furthermore, the management object (4g, 4h) includes a receiving unit 61, a detecting unit 62, a determining unit 63, a measuring unit 64, a transmitting / receiving unit 65, a determining unit 66, a measuring unit 67, and a storage / reading unit 68. Yes.

  Among them, the receiving unit 61 mainly processes the CPU 601 and the GPS receiving unit 614 shown in FIG. 10 or the processing of the GPS antenna connected to the CPU 901 and the external device I / F 916 shown in FIG. And has the same function as the receiving unit 41.

  The detection unit 62 is realized mainly by the processing of the CPU 601 and the acceleration / direction sensor 606 shown in FIG. 10 or the processing of the acceleration sensor connected to the CPU 901 and the external device 1 / F 916 shown in FIG. And has the same function as the detection unit 42.

  The determination unit 63 is mainly realized by the processing of the CPU 601 illustrated in FIG. 10 or the CPU 901 illustrated in FIG. 12, and has the same function as the determination unit 43.

  The measurement unit 64 is mainly realized by the processing of the CPU 601 shown in FIG. 10 or the processing of the CPU 901 shown in FIG. 12, and has the same function as the measurement unit 44.

  The transmission / reception unit 65 is realized mainly by the processing of the CPU 601 and the communication unit 613 illustrated in FIG. 10 or the processing of the CPU 901 and the communication circuit 915 illustrated in FIG. Have.

  The determination unit 66 is realized mainly by the processing of the CPU 601 illustrated in FIG. 10 or the processing of the CPU 901 illustrated in FIG. 12, and has the same function as the determination unit 53.

  The measurement unit 67 is realized mainly by the processing of the CPU 601 shown in FIG. 10 or the processing of the CPU 901 shown in FIG. 12, and has the same function as the measurement unit 54.

  The storage / reading unit 68 is realized mainly by the processing of the CPU 601 shown in FIG. 10 or the processing of the CPU 901 shown in FIG. 12, and is similar to the storage / reading unit 48 or the storage / reading unit 58. It has a function.

  Next, the functional configuration of the gateway 7 will be described with reference to FIG. FIG. 16 is a functional block diagram of the gateway and location information management system.

  The gateway 7 has a wireless communication control unit 70 and a wired communication control unit 80 as functions or means.

  The wireless communication control unit 70 is realized by the processing of the wireless communication unit 17 illustrated in FIG. 11 and basically has the same function as the wireless communication control unit 30 of the distribution device 3.

  Specifically, the wireless communication control unit 70 has a storage unit 79 constructed by the RAM 703 shown in FIG. The storage unit 79 stores the device identification information C described above. The wireless communication control unit 70 includes a transmission / reception unit 71, a communication unit 77, and a storage / reading unit 78.

  Among these, the transmission / reception part 71 is mainly implement | achieved by the process of CPU701 and the communication circuit 704 shown by FIG. 11, and transmits / receives various data with the delivery apparatus 3 by radio | wireless communication.

  The communication unit 77 is realized mainly by the processing of the CPU 701, the I / F 708 and the bus 709, and performs data (signal) communication with the wired communication control unit 80.

  The storage / reading unit 78 is realized mainly by the processing of the CPU 801, stores various data in the storage unit 79, and reads out various data from the storage unit 79.

  The wired communication control unit 80 is realized by the processing of the wired communication unit 18 shown in FIG. The wired communication control unit 80 has a storage unit 89 constructed by the RAM 803 shown in FIG. The storage unit 89 stores the device identification information D described above. The wired communication control unit 80 further includes a transmission / reception unit 81, a conversion unit 82, a communication unit 87, and a storage / reading unit 88.

  Among them, the transmission / reception unit 81 is realized mainly by the processing of the CPU 801 and the I / F 808b shown in FIG. 11, and transmits / receives various data to / from the location information management system 9 by wired communication.

  The conversion unit 82 is realized mainly by the processing of the CPU 801 and the Ethernet controller 805 shown in FIG. 11, and converts various communication data ( Information) is controlled so that Ethernet packet communication is possible.

  The communication unit 87 is mainly realized by the processing of the CPU 801 and the I / F 808a and the bus 809, and performs data (signal) communication with the wireless communication control unit 70.

  The storage / reading unit 98 is realized mainly by the processing of the CPU 801, stores various data in the storage unit 89, and reads out various data from the storage unit 89.

  Next, the functional configuration of the location information management system 9 will be described with reference to FIG.

  The location information management system 9 has a storage unit 99 constructed by the RAM 903 and the HD 904 shown in FIG. The storage unit 99 stores the above-described system identification information E, management information F, and layout information G. The location information management system 9 includes a transmission / reception unit 91, an operation input reception unit 92, a search unit 93, a display control unit 94, and a storage / reading unit 98.

  Among them, the transmission / reception unit 91 is mainly realized by the processing of the CPU 901 shown in FIG. 12 and the network I / F 909 or the communication circuit 915, and transmits / receives various data to / from the gateway 7 by wired communication or wireless communication. Do. Further, the transmission / reception unit 91 transmits / receives various data via the communication network 8 from the communication terminal 5h in the outdoor γ.

  The operation input receiving unit 92 is realized mainly by the processing of the CPU 901, the keyboard 911, and the mouse 912, and receives various selections or inputs from the administrator.

  The search unit 93 is realized mainly by the processing of the CPU 901, and searches the management information F in the storage unit 99 via the storage / reading unit 98 based on the search condition received by the operation input receiving unit 92. Is output.

  The display control unit 94 is realized mainly by the processing of the CPU 901 and performs control for displaying various images, characters, and the like on the display 908.

  The storage / reading unit 98 is realized mainly by the processing of the CPU 901, stores various data in the storage unit 99, and reads various data from the storage unit 99.

  Subsequently, the operation of the present embodiment will be described with reference to FIGS. 17 and 25.

  First, a process for constructing a communication network on the ceiling β of the indoor α will be described with reference to FIG. Note that. FIG. 17 is a sequence diagram illustrating a process of constructing a ceiling communication network.

  First, when the user turns on the power of each electrical appliance 2 in the indoor α, the storage / readout unit 38 (see FIG. 14) in the wireless communication control unit 30 of each distribution device 3 reads each device identification information from each storage unit 39. B is read (step S1). Then, each transmitting / receiving unit 31 makes a participation request including its own device identification information B to the gateway 7 (step S2). Thereby, the transmission / reception unit 71 in the wireless communication control unit 70 of the gateway 7 receives the participation request.

  Next, the storage / reading unit 78 of the wireless communication control unit 70 reads the device identification information C from the storage unit 79 (step S3). And the transmission / reception part 71 performs the participation response including apparatus identification information (B, C) with respect to the delivery apparatus 3 (step S4). Thereby, the transmission / reception unit 31 in the wireless communication control unit 30 of the distribution apparatus 3 receives the participation response. In this case, since the participation response includes the device identification information B transmitted in step S2, the wireless communication control unit 30 performs the reception process in step S4 as the process related to step S2. Do. Then, the storage / reading unit 38 stores the device identification information C in the storage unit 39 (step S5). Thus, the communication network between the distribution device 3 and the gateway 7 is constructed by storing the device identification information C of the gateway 7 on the distribution device 3 side.

  Next, a process of distributing position information from the distribution device 3 of the ceiling α of the indoor α shown in FIG. 1 to the floor will be described with reference to FIG. FIG. 18 is a sequence diagram showing a process for distributing position information. In FIG. 18, for the sake of simplicity, a case will be described in which a distribution system 6 constructed by two distribution devices (3a, 3b) is used. Here, the distribution apparatus 3a distributes the position information Xa, and the distribution apparatus 3b distributes the position information Xb. FIG. 18 illustrates a case where the communication terminal 5 exists within a range in which the distribution devices (3a, 3b) can distribute the position information (Xa, Xb).

  First, the storage / reading unit 28 in the distribution control unit 20 of the distribution apparatus 3a reads its own position information Xa from the storage unit 29 (step S23-1). And the delivery part 21 in the delivery control part 20 of the delivery apparatus 3a delivers the positional information Xa within the range which can be delivered (step S24-1). Similarly, the storage / reading unit 28 in the distribution control unit 20 of the distribution device 3b reads the position information Xb of itself from the storage unit 29 (step S23-2). And the delivery part 21 in the delivery control part 20 of the delivery apparatus 3b delivers the positional information Xb within the range which can be delivered (step S24-2). Even if the position information (Xa, Xb) is distributed, the communication terminal 5 cannot receive the position information (Xa, Xb) unless the receiving unit 41 is started.

  Next, a process of determining the position information X used by the communication terminal 5 and determining the distribution device 3 that is the transmission destination of the position information X will be described with reference to FIG. FIG. 19 is a sequence diagram illustrating processing for determining location information used by a communication terminal and determining a distribution device that is a destination of location information. FIG. 19 shows a case where the communication terminal 5 receives the position information Xa from the distribution device 3a, and transmits this position information Xa to the distribution device 3b instead of the transmission device 3a as the transmission source.

  First, as shown in FIG. 19, the storage / reading unit 48 in the reception control unit 40 of the communication terminal 5 performs the positional information Xa distributed from the distribution device 3a and the positional information Xb distributed from the distribution device 3b. Among them, the one having the highest signal strength when received by the communication terminal 5 is stored in the storage unit 49 (step S41). As a result, the position indicated by the stored position information X is managed by the position information management system 9 later as the position of the communication terminal 5.

  Here, the step S41 will be described in more detail with reference to FIG. FIG. 20 is a flowchart illustrating processing from when the communication terminal receives the position information until it is stored.

  First, the detection unit 42 in the reception control unit 40 of the communication terminal 5 continues to detect the start of movement of the communication terminal 5 (NO in steps S41-1 and S41-2). If the detection unit 42 detects the start of movement of the communication terminal 5 (YES in step S41-2), the detection unit 42 continues to detect the stop of movement of the communication terminal 5 (step S41-3). , S41-4 NO). More specifically, when the process of the CPU 401 shown in FIG. 7 is stopped, the acceleration sensor 405 starts moving the communication terminal 5 with respect to the CPU 401 based on detecting a change in acceleration. A signal indicating that the processing of the CPU 401 is to be started is transmitted. As a result, the CPU 401 starts its own processing. Then, the CPU 401 maintains the state where its own processing is started until it receives a signal from the acceleration sensor 405 indicating that the movement of the communication terminal 5 has stopped. Note that the movement of the communication terminal 5 in this case includes a case where the communication terminal 5 is tilted.

  Next, when the detection unit 42 detects the stop of the movement of the communication terminal 5 in step S41-4 (YES in step S41-4), the reception unit 41 is further distributed from the distribution device 3. The received position information X can be received (step S41-5). More specifically, when the CPU 401 shown in FIG. 7 receives a signal indicating that the movement of the communication terminal 5 has stopped from the acceleration sensor 405, the CPU 401 causes the communication circuit 404 to start processing of the communication circuit 404. Send a signal for. As a result, the communication circuit 404 starts its own processing. Here, when the position information (Xa, Xb) is distributed from each distribution device (3a, 3b), the communication circuit 404 in the control unit 14 of the communication terminal 5 receives the position information (Xa, Xb) via the antenna 404a. Reception of Xb) can be started.

  Next, the determination unit 43 determines whether or not at least one position information X has been received within a predetermined time (for example, within 5 seconds) after the reception unit 41 becomes ready to receive the position information X (for example, within 5 seconds). Step S41-6). Here, a case where two pieces of position information (Xa, Xb) are received within a predetermined time will be further described.

  In step S41-6, if the determination unit 43 determines that at least one piece of position information X has been received (YES), the determination unit 43 further determines whether a plurality of pieces of position information X have been received. Judgment is made (step S41-7).

  Next, in step S41-7, when it is determined that a plurality of pieces of position information X have been received (YES), the measurement unit 44 determines the signal intensity associated with each piece of position information X when received by the reception unit 41. Is measured (step S41-8). Here, the case where the signal intensity of the position information Xa is higher than the signal intensity of the position information Xb as a result of the measurement will be further described.

  Next, the storage / reading unit 48 stores the position information X having the highest signal intensity in the storage unit 49 by the measurement in step S41-8 (step S41-9). Here, the position information Xa is stored.

  On the other hand, when the determination unit 43 determines in step S41-6 that at least one position information X has not been received within a predetermined time (NO), the storage / reading unit 48 stores the storage unit 49 in the storage unit 49. Failure information indicating that reception has failed is stored (step S41-10).

  If the determination unit 43 determines in step S41-7 that a plurality of pieces of position information X have not been received within a predetermined time (NO), the storage / reading unit 48 receives only the received position information. X is stored (step S41-11).

  And after the process of said step S41-9,10,11, the receiving part 41 will be in the state which cannot receive the positional information X by stopping a process (step S41-12). More specifically, the CPU 401 illustrated in FIG. 7 transmits a signal for stopping the processing of the communication circuit 404 to the communication circuit 404. As described above, since the process of receiving the position information X is performed only when the communication terminal 5 stops after moving, even if a battery with a small capacity such as the button battery 406 is used. Thus, the frequency of battery replacement can be reduced as much as possible, and it is possible to contribute to power saving (energy saving).

  In the above description, after the movement of the communication terminal 5 is started (YES in step S41-2), the receiving unit 41 can receive the position information X by stopping the movement of the communication terminal 5 (YES in step S41-4). It will be in a state (step S41-5). That is, both the start of movement and the stop of movement are triggers that enable the reception unit 41 to receive the position information X. However, it is not restricted to this, For example, the receiving part 41 may be in the state which can receive the positional information X by the start of the movement of the communication terminal 5 (YES of step S41-2). That is, the step S41-3, 4 may be omitted, and the start of movement may be a trigger for the reception unit 41 to be able to receive the position information X. Further, for example, the step S41-1 and 2 may be omitted, and the stop of movement may be a trigger for the reception unit 41 to be able to receive the position information X.

  Subsequently, returning to FIG. 19, the communication unit 47 of the reception control unit 40 instructs the wireless communication control unit 50 to start the operation (step S42). Thereby, the communication part 57 of the wireless communication control part 50 starts the process shown below by receiving the command which starts operation | movement.

  First, the storage / reading unit 58 in the wireless communication control unit 50 of the communication terminal 5 reads out its own terminal identification information A from the storage unit 59 (step S43). Then, the transmission / reception unit 51 makes a participation request including the terminal identification information A to the distribution devices (3a, 3b) (step S44). Accordingly, the distribution devices (3a, 3b) each accept a participation request from the communication terminal 5.

  Next, the storage / reading unit 38 in the wireless communication control unit 30 of the distribution device 3a reads its own device identification information Ba from the storage unit 39 (step S45-1). And the transmission / reception part 31 of the delivery apparatus 3a performs the participation response including the terminal identification information A and the apparatus identification information Ba with respect to the communication terminal 5 (step S46-1). Thereby, the transmission / reception unit 51 in the wireless communication control unit 50 of the communication terminal 5 receives the participation response. In this case, since the participation response includes the terminal identification information A transmitted in step S44, the communication terminal 5 performs the reception process in step S46-1 as the process related to step S44. Do. Then, the storage / reading unit 58 in the wireless communication control unit 50 of the communication device 5 stores the device identification information Ba in the storage unit 59 (step S47-1).

  On the other hand, similarly on the distribution device 3b side, the storage / reading unit 38 in the wireless communication control unit 30 of the distribution device 3b reads out its own device identification information Bb from the storage unit 39 (step S45-2). Further, the transmission / reception unit 31 of the distribution device 3b makes a participation response including the terminal identification information A and the device identification information Bb to the communication terminal 5 (step S46-2). Thereby, the transmission / reception unit 51 in the wireless communication control unit 50 of the communication terminal 5 receives the participation response. And the memory | storage / reading part 58 in the radio | wireless communication control part 50 of the communication apparatus 5 memorize | stores apparatus identification information Bb in the memory | storage part 59 (step S47-2).

  Next, the wireless communication control unit 50 performs a process of determining the distribution device 3 that is the transmission destination of the position information X received from the distribution device 3 and its own terminal identification information A (step S48). Here, the process of step S48 will be described in detail with reference to FIG. 22, but before that, the background for performing the process of step S48 will be described with reference to FIGS. 5, 14, and 21. FIG. 21 is an image diagram showing a communication status between the distribution apparatus and the communication terminal.

  As illustrated in FIG. 14, communication between the distribution control unit 20 of the distribution device 3 and the reception control unit 40 of the communication terminal 5 is performed by wireless communication between the wireless communication control unit 30 of the distribution device 3 and the communication terminal 5. It is independent of communication with the control unit 50. The reception control unit 40 receives the position information X from the distribution device 3 as a distribution source, while the wireless communication control unit 50 sends the position information X back to the distribution device 3 together with its own terminal identification information A.

  However, if the distribution control unit 20 and the wireless communication control unit 30 are to be provided in all the distribution devices 3, if the floor area of the indoor α is large, a large number of distribution devices 3 are installed. May be very high (Pattern 1).

  The distribution device 3a can distribute the position information Xa. However, since the wireless communication control unit 30 of the distribution device 3a is out of order, the terminal identification information A and the position information Xa can be received from the communication terminal 5. It may not be possible (Pattern 2).

  Further, when a plurality of distribution devices 3 are installed on the ceiling β, depending on the position of the communication terminal 5 in the indoor α, the distribution device 3a distributes more than the distribution control unit 20 (see step S24-2) of the distribution device 3b. Although the signal strength of the data of the position information X received from the control unit 20 (see step S24-1) is high, the radio of the distribution device 3b is more wireless than the radio communication control unit 30 (step S46-1) of the distribution device 3a. The signal strength of the participation response data received from the communication control unit 30 (step S46-2) may be high (pattern 3).

  In the case of each of the above patterns 1 to 3, as shown in FIG. 21, the communication terminal 5h receives the position information Xa from the distribution device 3a that is the distribution source, but as a transmission destination that is different from the distribution device 3a. The position information Xa is transmitted together with its own terminal identification information A to the distribution device 3b. Below, the example in the case where such a delivery source and a transmission destination differ is demonstrated using FIG.14 and FIG.20. FIG. 22 is a flowchart showing processing for determining a transmission destination.

  The determination unit 53 in the wireless communication control unit 50 of the communication terminal 5 shown in FIG. 14 is within a predetermined time after the transmission / reception unit 51 makes a participation request to each distribution device (3a, 3b) in step S44 (for example, Within 5 seconds), it is determined whether at least one participation response has been received (step S48-1). That is, the determination unit 53 determines whether at least one device identification information B has been received within a predetermined time after the transmission of the terminal identification information A is started.

  Next, in step S48-1, when the determination unit 53 determines that at least one participation response has been received (YES), the determination unit 53 further determines whether a plurality of participation responses have been received. (Step S48-2). That is, the determination unit 53 determines whether a plurality of device identification information B has been received within a predetermined time after the transmission of the terminal identification information A is started.

  Next, when it is determined in step S48-2 that a plurality of participation responses have been received (YES), the measurement unit 54 measures the signal strength related to the participation response when received by the transmission / reception unit 51. (Step S48-3). Here, in steps S46-1 and S46-2, the wireless communication control unit 50 of the communication terminal 5 receives the participation response from each distribution device (3a, 3b), and therefore executes the process of step S48-3. .

  Next, the case where the signal strength of the participation response from the distribution device 3b is higher than the signal strength of the participation response from the distribution device 3a as a result of the measurement by the process of step S48-3 will be further described. As shown in FIG. 22, the storage / read-out unit 58 includes the device identification information B (here, the signal strength measured in step S48-3) included in the participation response, which is the maximum signal strength. Then, the device identification information Bb) is stored in the storage unit 59 (step S48-4).

  If the determination unit 53 determines in step S48-1 that at least one participation response has not been received within a predetermined time (NO), the process of determining the transmission destination ends. If the determination unit 53 determines in step S48-2 that a plurality of participation responses have not been received (NO), the storage / readout unit 58 receives the only received participation response in the storage unit 59. Is stored (step S48-5).

  As described above, the distribution device 5 indicated by the device identification information B stored in the storage / reading unit 58 is determined as the transmission destination of the communication terminal 5.

  After the processes in steps S48-4 and S5, the transmission / reception unit 51 creates a data structure of information as shown in FIG. 9 for the transmission destination determined in step S48 (step S49). ). The data structure in this case includes the device identification information Bb of the distribution device 3b as the transmission destination, the terminal identification information Ah of the communication terminal 5h as the transmission source, and the data contents (here, the position of the distribution device 3a as the distribution source) Information Xa) is arranged in order.

  Next, the transmission / reception unit 51 transmits information on the data structure created in step S49 to the distribution device 3b (step S50). As a result, the wireless communication control unit 30 of the distribution device 3b receives the information transmitted from the communication terminal 5h.

  In the communication terminal 5h, the processing of the transmission / reception unit 51, the determination unit 53, the measurement unit 54, the communication unit 57, and the storage / read unit 58 of the wireless communication control unit 50 is stopped (step S51). As described above, when the transmission / reception unit 51 finishes transmitting the information such as the position information X to the distribution device 3, the processing of each component of the wireless communication control unit 50 is stopped, thereby realizing energy saving. There is an effect that can be. Each component of the wireless communication control unit 50 can be restarted by receiving a new start command from the reception control unit 40 in step S42.

  Next, a process from when the information including the position information X is received by the distribution apparatus 3 until being managed as the management information F by the position information management system 9 will be described with reference to FIG. FIG. 23 is a sequence diagram showing processing for managing position information.

  As shown in FIG. 23, first, the wireless communication control unit 30 of the distribution apparatus 3b creates a data structure of information to be transmitted to the gateway 7 as in the process of step S49 (step S61). The data structure in this case includes the device identification information C of the gateway 7 that is the transmission destination, the device identification information Bb of the distribution device 3b that is the transmission source, and the data contents (position information Xa and position of the distribution device 3a that is the distribution source) The terminal identification information A) of the communication terminal 5 that is the transmission source of the information Xa is arranged in order.

  Next, the transmission / reception unit 31 in the wireless communication control unit 30 of the distribution device 3b transmits the data structure information created in step S61 to the gateway 7 (step S62). Thereby, the transmission / reception unit 71 in the wireless communication control unit 70 of the gateway 7 receives the information transmitted from the distribution device 3b.

  Next, the communication unit 77 of the wireless communication control unit 70 transfers the information received in step S62 to the communication unit 87 of the gateway 7 (step S63). Thereby, the wired communication control unit 80 receives the information transferred from the wireless communication control unit 70.

  Next, the conversion unit 82 of the wired communication control unit 80 converts the communication method compliant with IEEE802.15.4 into a communication method compliant with IEEE802.3, and converts the information sent from the distribution device 3b to the Ethernet. To enable packet communication. And the transmission / reception part 81 of the wired communication control part 80 produces the data structure of the information transmitted to the positional infomation management system 9 like the process of said step S61 (step S65). The data structure in this case is the system identification information E of the location information management system 9 that is the transmission destination, the device identification information D of the gateway 7 that is the transmission source, and the data content (position information Xa of the distribution device 3a that is the distribution source). In addition, the terminal identification information A) of the communication terminal 5 that is the transmission source of the position information Xa is sequentially arranged.

  Next, the transmission / reception unit 81 in the wired communication control unit 80 of the gateway 7 transmits information on the data structure created in step S65 to the position information management system 9 (step S66). As a result, the transmission / reception unit 91 of the location information management system 9 receives the information transmitted from the gateway 7.

  Next, the storage / reading unit 98 of the location information management system 9 associates the terminal identification information A stored in advance in the storage unit 99 with the information on the reception date and time when the location information X etc. is received and the location information Xa. Then, by storing as management information F as shown in FIG. 13, management processing of position information is performed (step S67).

  As described above, the management of the management information F by the location information management system 9 enables the administrator of the location information management system 9 to perform a search as shown in FIGS. 24 and 25 are diagrams showing examples of screens in the position information management system.

  For example, when the administrator operates the keyboard 911 and the mouse 912 shown in FIG. 12, the operation input receiving unit 92 receives the operation input, and the display control unit 94 receives the management information F via the storage / reading unit 98. Reading and displaying a search screen as shown in FIG. 24 on the display 908. On this search screen, a search list in which device names are shown for each owner name (or administrator name) is displayed. A check box is displayed on the right side of the device name. Further, a “search execution” button for executing a search is displayed at the lower right of the search list. The search screen shown in FIG. 24 shows a case where, for example, the position of the device “UCS P3000” owned by the owner “Sales Division 1” is searched.

  Then, when the administrator operates the keyboard 911, the mouse 912, and the like to add a check mark to the check box in the device name of the device (management target object 4) whose position is to be known, the operation input receiving unit 92 inputs the check. Accept. Then, after checking the checkboxes in the device names of all the devices for which the administrator wants to know the location and pressing the “Search Execution” button, the operation input receiving unit 92 receives the search execution, and the search unit 93 By searching the management information F stored in the storage unit 99 based on the device name with the check mark, a part of the management information F including the corresponding position information X and the position information X Layout information G indicating a floor including the position is extracted.

  Then, the display control unit 94 displays a search result screen as shown in FIG. 25 on the display 908 based on the management information F and the layout information G. In this search result screen, a layout diagram of the floor “Building A 4th floor” where the device “UCS P3000” is located, position information X in the management information F, and information on the reception date and time are shown. As a result, the administrator can visually grasp the position of the management object 4 (communication terminal 5).

  As described above, according to the present embodiment, the distribution device 3 includes the transmission / reception unit 31 as well as the distribution unit 21. That is, the communication terminal 5 existing within the range where the position information X distributed from the distribution device 3 arrives only needs to transmit the position information X and the terminal identification information A to the distribution device 3 within this range. Only minimal power consumption is required. Therefore, there is an effect that the distribution device can contribute to power saving of the communication terminal.

  In addition, since the process of receiving the position information X is started only when the communication terminal 5 stops after moving, it can contribute to power saving (energy saving) by suppressing the consumption of the battery capacity. There is an effect. Furthermore, when the transmission / reception unit 51 finishes transmitting information such as the position information X to the distribution device 3, the processing of each component of the wireless communication control unit 50 is stopped, thereby realizing power saving. There is an effect that can be. By contributing to power saving, the frequency of battery replacement can be reduced as much as possible even when a battery with a small capacity such as the button battery 406 is used. There is also an effect that can be done.

  Further, as shown in FIG. 21, the distribution device 3b can receive the position information Xa and the terminal identification information A from the communication terminal 5 in place of the distribution device 3a. The effect that it can suppress can be produced (corresponding to the above pattern 1). Even if the wireless communication control unit 30 breaks down, the distribution system 6 can obtain the position information Xa and the terminal identification information A from the communication terminal 5 (corresponding to the pattern 2 described above). Furthermore, since the communication terminal 5 can transmit the position information X and the terminal identification information A to the distribution device 3 capable of performing communication with higher signal strength, the distribution system 6 includes the communication terminal 5. Therefore, it is possible to receive the position information X and the terminal identification information A more reliably (corresponding to the pattern 3).

  The location information management system 9 may be constructed by a single computer, or may be constructed by a plurality of computers arbitrarily assigned by dividing each unit (function, means, or storage unit). .

  In addition, a recording medium such as a CD-ROM in which the programs of the above-described embodiments are stored, and a hard disk in which these programs are stored may be provided as a program product (Program Product) domestically or abroad. it can.

  In addition, a recording medium such as a CD-ROM in which the programs of the above-described embodiments are stored, and a hard disk in which these programs are stored may be provided as a program product (Program Product) domestically or abroad. it can.

  Furthermore, the determination unit 63 as a specific example of the first determination unit may include a determination unit 53 as a specific example of the second determination unit. That is, the first determination unit and the second determination unit may be the same unit or different units. Similarly, the measurement unit 64 as a specific example of the first measurement unit may include a measurement unit 67 as a specific example of the second measurement unit. That is, the first measuring means and the second measuring means may be the same means or different means.

  As described above, the communication terminal 5 according to the embodiment of the present invention can receive the position information X transmitted from the distribution device 3. In the above example, the position information X is used by the position information management system 9 to manage the location of the communication terminal 5. The position information X can be used by, for example, a route guidance application (so-called navigation application) when the communication terminal 5 is a mobile phone. The navigation application is an application having a function of displaying the current position of the communication terminal 5 on a map and displaying a route from the current position to the destination on the map. The communication terminal 5 cannot grasp the current position of the communication terminal 5 indoors using GPS. Therefore, the communication terminal 5 can obtain the current position by prediction using a relative positioning technique. Relative positioning is a technique for predicting and obtaining the current position using information from an acceleration sensor or a geomagnetic sensor incorporated in the communication terminal 5. However, the relative position information obtained by relative positioning can include many errors. Therefore, it is necessary to correct the current position with the absolute position information X distributed by IMES. On the other hand, since the positioning signal itself transmitted by IMES is also transmitted within a certain range, there is a possibility that a large error is included depending on the position of the communication terminal that receives the positioning signal.

Therefore, the communication terminal 5 in the following embodiment calculates the current position information by the relative positioning technique, and when the position information acquired by the IMES can be regarded as “sufficiently accurate”, the position information by the IMES is Position information. At this time, the location information by IMES is regarded as “sufficiently accurate” when the signal strength (radio wave strength) of the positioning signal of IMES is equal to or greater than a predetermined threshold. Hereinafter, description will be made using the following three embodiments.
(1) An example in which threshold information is stored in advance in the communication terminal 5, and using this information, it is determined whether or not to use position information based on IMES (first example).
(2) Embodiment in which threshold information is stored in the location information management system 9 and the communication terminal 5 acquires and uses the information (second embodiment)
(3) Embodiment in which threshold information is distributed from the distribution device 3 together with the position information X, and the communication terminal 5 acquires and uses the information (third embodiment).
The communication terminal 5 in the following embodiments will be described as having the hardware configuration shown in FIG. 10, but is not limited to this, and may have additional parts or some parts. It does not have to be.

(First embodiment)
First, threshold value information is stored in advance in the communication terminal 5, and a first example of determining whether or not to use position information based on IMES using this information will be described with reference to FIG. 26-30. .

FIG. 26 is a diagram showing an example of a signal intensity threshold expression method that can be used in common in the first, second, and third embodiments. First, the signal strength is the strength of a radio signal transmitted using IMES, and is expressed in “dBHz”. dBHz is a unit that is generally used to express signal strength (positioning sensitivity) (C / N ratio; Carrier to Noise ratio) with a GPS receiver or the like. 30-50 dBHz. The signal strength threshold is a threshold serving as a reference for determining whether or not the position information included in the positioning signal can be used as the current position when the communication terminal 5 receives the positioning signal by IMES. For example, even if the signal strength of the positioning signal transmitted by IMES is 30 dBHz and the positioning is possible, the position information obtained by the positioning signal is not used when the signal strength threshold is 40 dBHz. As described above, since the positioning signal transmitted from the distribution device 3 is transmitted with a spread in a certain range, the signal strength is less than a certain value (that is, a certain distance away). This is because the position information indicated by the positioning signal may not represent an accurate current position. The value to be set as the signal strength threshold can be determined in advance by an administrator or the like under the following conditions.
(1) Positioning signal transmission characteristics of the distribution device 3 (for example, antenna characteristics, transmission output)
(2) Installation environment of distribution device 3 (ceiling height)
(3) Application type of communication terminal 5 (degree of request for accuracy)
That is, the signal strength threshold can be individually determined for each distribution device 3.

  In the following embodiments, the communication terminal 5 measures the signal strength of the positioning signal received from the distribution device 3, and compares the signal strength with a predetermined signal strength threshold. When the signal strength is equal to or greater than the signal strength threshold, it can be determined that the position information may be the current position.

  In FIG. 26, four patterns of signal strength thresholds are defined, and 2-bit values for use in storage or communication are assigned to each. However, FIG. 26 is merely an example, and an arbitrary signal strength threshold value may be assigned using a larger number of bits. Further, the signal strength threshold itself may be expressed by a binary number with a variable bit length.

  FIG. 27 is a conceptual diagram of the signal strength threshold information S that the communication terminal 5 acquires and stores in advance from an external server or the like. Here, the signal strength threshold is set for the position information (latitude, longitude, floor number, building) distributed by the distribution device 3. In FIG. 27, latitude and longitude are defined by ranges, but signal strength thresholds may be set for individual latitudes and longitudes. For example, it is assumed that the communication terminal 5 receives the following position information X from the distribution device 3.

-Latitude: 35.459555
-Longitude: 139.387110
-Number of floors: 16
-Building: C
This position information X corresponds to the top entry in the table shown in FIG. Therefore, the communication terminal 5 can employ the position information X as the current position of the communication terminal 5 if the signal strength of the positioning signal related to the position information X is 40 dBHz or more.

  FIG. 28 is a functional block diagram of a communication terminal (managed object) in the first embodiment. Of the elements shown in FIG. 28, the reception unit 161, the detection unit 162, the determination unit 163, the measurement unit 164, the transmission / reception unit 165, the determination unit 166, the measurement unit 167, the storage / readout unit 168, and the storage unit 169, respectively. 15 corresponds to the reception unit 61, the detection unit 62, the determination unit 63, the measurement unit 64, the transmission / reception unit 65, the determination unit 66, the measurement unit 67, the storage / read unit 68, and the storage unit 69 in FIG. The communication terminal 5 in FIG. 28 further includes a calculation unit 170, a determination unit 171 and a display unit 172. Further, the signal strength threshold value information S is stored in the storage unit 169 in advance.

  Among these, the detection unit 162 detects the acceleration, angular velocity, direction (tilt), and the like of the communication terminal 5 in addition to the function of the detection unit 62 in FIG. 15, and passes the detected information to the calculation unit 170.

  Unlike the measurement unit 64 in FIG. 15, the measurement unit 164 does not depend on the determination of the determination unit 163 (that is, regardless of the number of position information X received by the reception unit 161), and the signal strengths of all received positioning signals. , And the value can be stored in the storage unit 169.

  The calculation unit 170 is mainly realized by the processing of the CPU 601 shown in FIG. 10 or the CPU 901 shown in FIG. 12, and based on the information passed by the detection unit 162, the current position of the communication terminal 5 Is calculated. The calculation method of the current position includes the position information of the latest communication terminal 5, the time difference between the current time and the time when the position information was acquired, the moving speed (acceleration) of the communication terminal 5 detected in the time difference, and the moving direction. Based on the above. Any existing PDR technique can be used as the calculation method. Thus, the position information R calculated by relative positioning is passed to the determination unit 171.

  The determination unit 171 is mainly realized by the processing of the CPU 601 illustrated in FIG. 10 or the CPU 901 illustrated in FIG. The determination unit 171 determines which of the position information X acquired through the reception unit 161 and the relative position information R detected by the calculation unit 170 is position information indicating the current position of the communication terminal 5. . In order to make the determination, the determination unit 171 uses the signal strength value of the positioning signal related to the position information X measured by the measurement unit 164 as a signal included in the signal strength threshold information S stored in the storage unit 169. Compare with intensity threshold. The determination unit 171 determines that the position information X is position information P that represents the current position of the communication terminal 5 when the signal strength of the positioning signal is equal to or greater than the signal strength threshold. On the other hand, if the signal strength of the positioning signal is less than the signal strength threshold, it is determined that the position information R calculated by relative positioning is the position information P representing the current position of the communication terminal 5. Position information P indicating the current position is stored in the storage unit 169.

  The display unit 172 is realized mainly by the processing of the CPU 601 and the display 615 shown in FIG. 10 and displays the position information P stored in the storage unit 169 together with a map including the position represented by the position information P. .

  Subsequently, the operation of the communication terminal 5 in the first embodiment will be described with reference to FIG.

  The calculation unit 170 of the communication terminal 5 calculates the relative position information R of the communication terminal 5 based on the movement of the communication terminal 5 detected by the detection unit 162 (step S101). Any existing relative positioning technique can be used as the calculation method. Next, when the receiving unit 161 receives the position information X distributed from the distribution device 3 (step S102), the measuring unit 164 measures the signal strength of the positioning signal related to the position information X (step S103). Then, the determination unit 171 reads the signal strength threshold corresponding to the position information X with reference to the signal strength threshold information S stored in the storage unit 169 and configured as illustrated in FIG. 27, for example (step S104). ).

  The determination unit 171 compares the signal intensity measured in step S103 with the signal intensity threshold read in step S104. If the former value is greater than or equal to the latter value (YES in step S105), the determination unit 171 receives the signal intensity in step S102. The obtained position information X is stored as the current position information P of the communication terminal (step S106). On the other hand, if not (NO in step S105), the relative position information R calculated in step S101 is stored as the current position information P of the communication terminal (step S107).

  Thereafter, a map is displayed on the display unit 172 with the position information P as the current position. By continuously executing the above-described operation, position information based on relative positioning can be corrected as appropriate using position information with high reliability among position information that can be acquired by IMES. For example, in an application that performs navigation of pedestrians indoors, if the current position is acquired by relative positioning and position information by highly reliable IMES can be acquired, the current position is appropriately corrected using the position information. It becomes possible to do.

  In the above description, an example in which a single piece of position information X is received has been described. However, when a plurality of pieces of position information are received, for example, a positioning signal having the highest signal strength can be used.

  FIG. 30 shows an operation example of the communication terminal 5 in the first embodiment, as in FIG. 29, but further includes additional steps. In FIG. 30, steps S111 to S115, S117, and S118 are the same as steps S101 to S105, S106, and S107 of FIG. 29, respectively. In FIG. 30, only when the determination unit 171 continuously receives two or more pieces of position information X from the same distribution device, the position information X is stored as the current position information P (YES in step and S116). , S117). That is, if the position information X is received once from a certain distribution device 3, even if the signal strength of the positioning signal is equal to or higher than the signal strength type position, it is not adopted as the current position information P. Thereby, only when the positioning signal can be stably received, the position information can be used as the current position, and the positioning system can be further enhanced. Note that the number of times the position information X is received can be arbitrarily determined. Further, instead of setting the condition for the number of receptions of the position information X, it may be set on the condition that the position information X is continuously received at a predetermined interval for a certain period.

(Second embodiment)
Next, a second embodiment in which the signal strength threshold is stored in the position information management system 9 and the communication terminal 5 acquires and uses the information will be described with reference to FIGS. The communication terminal 5 in the following embodiments will be described as having the hardware configuration shown in FIG. 10, and the location information management system 9 will be described as having the hardware configuration shown in FIG. However, these hardware configurations are not limited to the example of FIG. 10 or FIG. 12, and may include additional components or may not include some components.

  FIG. 31 is a conceptual diagram of the distribution apparatus information I including the signal strength threshold stored in the position information management system 9. The signal strength threshold described in the first embodiment is stored as part of the distribution apparatus information I in the present embodiment. As illustrated in FIG. 31, the distribution device information I is information in which various information such as device identification information B, position information X (latitude, longitude, floor number, building), transmission output, and signal strength threshold value are associated with each other. . The device identification information B and the position information X are as described above.

  The transmission output represents the signal transmission output of the positioning signal by IMES output from the distribution device 3 identified by the device identification information B, and is generally expressed in units of “dBm”. “DBm” represents 1 mW as 0 dB, and is a unit widely used to determine the transmission output of a radio signal. The set value of the transmission output is transmitted to each distribution device 3 through the gateway 7 and used when determining the transmission output of the positioning signal by the communication circuit 204 and the antenna 204a of the position information control unit 12.

  As described above, the signal strength threshold is a reference for determining whether or not the position information included in the positioning signal can be used as the current position when the communication terminal 5 receives the positioning signal by IMES. Is a threshold value. In the second embodiment, unlike the first embodiment, the signal strength threshold is directly associated with the distribution device 3 in the distribution device information I and stored in the position information management system 9.

  Next, the functional configuration of the location information management system 9 in the second embodiment will be described with reference to FIG. 32, the transmission / reception unit 291, the operation input reception unit 292, the search unit 293, the display control unit 294, the storage / reading unit 298, and the storage unit 299 are respectively the transmission / reception unit 91 and the operation input in FIG. 16. This corresponds to the receiving unit 92, the search unit 93, the display control unit 94, the storage / reading unit 98, and the storage unit 99. Among these, the storage unit 99 further stores the distribution device information I described above.

In addition to the functions provided in the transmission / reception unit 91, the transmission / reception unit 291 further has a function of receiving inquiry data regarding the signal strength threshold from the communication terminal 5 via the wireless network. The inquiry data includes the position information X received by the communication terminal 5. Further, the transmission / reception unit 291 further has a function of transmitting the signal strength threshold searched by the search unit 293 to the communication terminal 5. For example, from a communication terminal, the following location information: Latitude: 35.459555
-Longitude: 139.387110
-Number of floors: 16
-Building: C
Is received, the signal strength threshold “40” set for the distribution device identified by the device identification information B “21.17.10.10” is transmitted to the communication terminal 5.

  In addition to the functions provided in the search unit 93, the search unit 293 further sets a signal strength threshold corresponding to the position information X included in the query data in response to the reception of the query data by the transmission / reception unit 291. I has a function to search from I.

  Next, the functional configuration of the communication terminal 5 in the second embodiment will be described with reference to FIG. 33, the receiving unit 261, the detecting unit 262, the determining unit 263, the measuring unit 264, the transmitting / receiving unit 265, the determining unit 266, the measuring unit 267, the storage / reading unit 268, the storage unit 269, and the calculating unit 270. The determination unit 271 and the display unit 272 are the reception unit 161, the detection unit 162, the determination unit 163, the measurement unit 164, the transmission / reception unit 165, the determination unit 166, the measurement unit 167, and the storage shown in FIG. 28 (first embodiment), respectively. Corresponds to the reading unit 168, the storage unit 169, the calculation unit 170, the determination unit 171, and the display unit 172. Note that the storage unit 269 in this embodiment does not store the signal strength threshold information S shown in FIG. 27 in the first embodiment. In addition, the communication terminal 5 in the present embodiment further includes an inquiry unit 273.

  Among these, unlike the first embodiment, the determination unit 271 uses the signal strength acquired by the inquiry unit 273 from the location information management system 9 instead of using the signal strength threshold value of the signal strength threshold value information S stored in the storage unit. A determination is made to determine the current position information P using the threshold value.

  The inquiry unit 273 is mainly realized by the processing of the CPU 601 shown in FIG. 10 or the CPU 901 shown in FIG. When the receiving unit 261 receives the position information X, the inquiry unit 273 makes an inquiry to the position information management system 9 through the wireless network in order to acquire the signal strength threshold set in the distribution device 3 that distributes the position information X. Generate data. The inquiry data includes position information X.

  The transmission / reception unit 265 further has a function of transmitting the inquiry data generated by the inquiry unit 273 to the location information management system 9 through the wireless network. And it has further the function to receive the signal strength threshold value returned from the position information management system 9 according to the inquiry data. The received signal strength threshold value can be stored in the storage unit 269.

  Next, the operation of the second embodiment will be described with reference to FIGS.

  FIG. 34 shows the operation of the communication terminal 5 in the second embodiment.

  The calculation unit 270 of the communication terminal 5 calculates the relative position information R of the communication terminal 5 based on the movement of the communication terminal 5 detected by the detection unit 262 (Step S201). Any existing relative positioning technique can be used as the calculation method. Next, when the receiving unit 261 receives the position information X transmitted from the distribution device 3 (step S202), the signal intensity threshold corresponding to the position information X has not been received (or stored) (NO in step S203). ), The inquiry unit 273 generates signal intensity threshold inquiry data. Then, the transmission / reception unit 265 transmits the inquiry data to the location information management system 9 through the wireless network (step S204).

  Subsequently, when the transmission / reception unit 265 receives a signal strength threshold value from the location information management system via the wireless network (step S205), the measurement unit 264 measures the signal strength of the positioning signal related to the location information X (step S206). , YES in step S203). Then, the determination unit 171 compares the signal strength measured in step S206 with the signal strength threshold corresponding to the position information X received (or already received) in step S205, and the former value is the latter value. If it is above (YES in step S207), the position information X received in step S202 is stored as the current position information P of the communication terminal (step S208). On the other hand, if not (NO in step S207), the relative position information R calculated in step S201 is stored as the current position information P of the communication terminal (step S209).

  Thereafter, a map is displayed on the display unit 272 with the position information P as the current position. By continuously executing the above-described operation, position information based on relative positioning can be corrected as appropriate using position information with high reliability among position information that can be acquired by IMES. For example, in an application that performs navigation of pedestrians indoors, if the current position is acquired by relative positioning and position information by highly reliable IMES can be acquired, the current position is appropriately corrected using the position information. It becomes possible to do.

  In step S205, a plurality of signal strength thresholds corresponding to other position information other than the position information X included in the inquiry data in step S204 may be received together. For example, when the position information Xa is included in the inquiry data, an arbitrary number of signal strength thresholds such as position information Xb, Xc,... Belonging to a certain range from the position information Xa may be acquired. . Thus, by receiving and storing a plurality of signal strength thresholds in advance, the number of inquiries in steps S204 and S205 can be reduced, and the processing speed for obtaining the current position information P is improved. be able to.

  FIG. 35 is a sequence diagram illustrating an operation in which the communication terminal 5 transmits the signal strength threshold inquiry data and receives the corresponding signal strength threshold from the location information management system 9. In FIG. 35, the distribution device 3 and the gateway 7 are shown. However, the communication terminal 5 and the location information management system 9 do not pass through the distribution device 3 and the gateway 7, and are a network such as a 3G line or a wireless LAN. You may communicate directly via. In FIG. 35, the data structure generation processing related to communication, such as the inquiry data and the signal strength threshold response, and the conversion processing by the gateway 7 are the same as the processing shown in FIGS. Description is omitted.

  When the reception unit 261 has not received the signal strength threshold corresponding to the position information X, the inquiry unit 273 of the communication terminal 5 generates the signal strength threshold inquiry data, and sends the inquiry data to the transmission / reception unit 265. Transfer (step S211). The transmission / reception unit transmits the inquiry data to the distribution device 3 (step S212). Thereafter, the inquiry data is transmitted to the location information management system 9 via the gateway 7 (steps S213 and S214).

  When the transmission / reception unit 291 receives the query data of the signal strength threshold, the search unit 293 of the location information management system sets the signal strength threshold corresponding to the location information X included in the query data, for example, the distribution device information I shown in FIG. (Step S215). Then, the corresponding signal strength threshold value is returned to the gateway 7 (step S216). The signal strength threshold is received by the transmission / reception unit 265 of the communication terminal 5 via the distribution device 3 (steps S217 and S218) and stored in the storage unit 269. Thereafter, as shown in steps S206 to S209 of FIG. 34, the current position information P of the communication terminal 5 is determined by the determination unit 271 (step S220) and stored (step S221).

(Third embodiment)
Next, a third embodiment in which the signal intensity threshold is distributed together with the position information X from the distribution apparatus 3 will be described with reference to FIGS.

  FIG. 36-38 shows an example in which the distribution apparatus 3 includes the 2-bit signal strength threshold shown in FIG. 26 in the positioning signal when the positioning signal includes the position information X according to the IMES standard. FIG. In the current IMES standard, as shown in FIG. 41, four types of MID (Message type ID) (0, 1, 3, 4) are defined, and a frame format is defined for each MID. ing. FIG. 36 shows an example in which predetermined 2 bits are used as a signal intensity threshold storage area in a total of 6 bits prepared as a “Reserved” area in a frame format with MID = 1. Similarly, FIG. 37 illustrates an example in which a part of an area defined as “Short ID” is used as an area for storing a signal strength threshold in a frame format with an MDI of 3. Similarly, FIG. 38 illustrates an example in which a part of an area defined as “Medium ID” is used as an area for storing a signal strength threshold in a frame format with an MID of 4. 37 and 38, since position information is not included in the same frame, it must be used in combination with position information included in another frame transmitted immediately before or immediately after. The above configuration is an example, and values other than the signal strength threshold shown in FIG. 26 may be expressed by an arbitrary number of bits.

  Next, the functional configuration of the distribution apparatus 3 in the third embodiment will be described with reference to FIG. 39, the conversion unit 310, the distribution unit 321, the communication unit 327, the storage / reading unit 328, the storage unit 329, the transmission / reception unit 331, the communication unit 337, the storage / reading unit 338, and the storage unit 339 include 14 correspond to the conversion unit 10, the distribution unit 21, the communication unit 27, the storage / reading unit 28, the storage unit 29, the transmission / reception unit 31, the communication unit 37, the storage / reading unit 38, and the storage unit 39, respectively. The storage unit 329 further stores a radio field intensity threshold value.

  Among these, the distribution unit 321 has a function of distributing the radio field intensity threshold value read from the storage unit 329 together with the position information X within the range that can be distributed.

  Next, the functional configuration of the communication terminal 5 in the third embodiment will be described with reference to FIG. Among the elements shown in FIG. 40, the receiving unit 361, the detecting unit 362, the determining unit 363, the measuring unit 364, the transmitting / receiving unit 365, the determining unit 366, the measuring unit 367, the storage / reading unit 368, the storage unit 369, and the calculating unit 370. The determination unit 371 and the display unit 372 are respectively a reception unit 161, a detection unit 162, a determination unit 163, a measurement unit 164, a transmission / reception unit 165, a determination unit 166, a measurement unit 167, and a storage in FIG. 28 (first embodiment). Corresponds to the reading unit 168, the storage unit 169, the calculation unit 170, the determination unit 171 and the display unit 172.

  Among these, the receiving unit 361 further has a function of receiving the position information X and the radio wave intensity threshold distributed from the distribution device 3. The received position information X and radio field intensity threshold value may be temporarily or semi-permanently stored in the storage unit 369.

  Unlike the first embodiment, the determination unit 371 uses the signal strength threshold acquired from the distribution device by the receiving unit 361 instead of using the signal strength threshold of the signal strength threshold information S stored in the storage unit, and determines the current position. A determination is made to determine the information P.

  In addition, the transmission / reception unit 331 may be configured to receive information on determination of the current position information P of the communication terminal 5 by the determination unit 371 of the communication terminal 5 described later. The result may be transmitted to the location information management system 9 or the like.

  Next, the operation of the communication terminal 5 in the third embodiment will be described with reference to FIG.

  The calculation unit 370 of the communication terminal 5 calculates the relative position information R of the communication terminal 5 based on the movement of the communication terminal 5 detected by the detection unit 362 (Step S301). Any existing relative positioning technique can be used as the calculation method. Next, when the receiving unit 361 receives the position information X and the signal strength threshold distributed from the distribution device 3 (step S302), the measuring unit 364 measures the signal strength of the positioning signal related to the position information X ( Step S303).

  The determination unit 171 compares the signal strength measured in step S303 with the signal strength threshold received in step S302. If the former value is greater than or equal to the latter value (YES in step S304), the determination unit 171 receives the signal strength in step S302. The obtained position information X is stored as the current position information P of the communication terminal (step S305). On the other hand, if not (NO in step S304), the relative position information R calculated in step S301 is stored as the current position information P of the communication terminal (step S306).

  Thereafter, the display unit 372 displays a map with the position information P as the current position. By continuously executing the above-described operation, position information based on relative positioning can be corrected as appropriate using position information with high reliability among position information that can be acquired by IMES. For example, in an application that performs navigation of pedestrians indoors, if the current position is acquired by relative positioning and position information by highly reliable IMES can be acquired, the current position is appropriately corrected using the position information. It becomes possible to do.

  In the above description, an example in which a single piece of position information X is received has been described. However, when a plurality of pieces of position information are received, for example, a positioning signal having the highest signal strength can be used.

DESCRIPTION OF SYMBOLS 1 Position management system 2 Electric equipment 3 Distribution apparatus 4 Management object 5 Communication terminal 6 Distribution system 7 Gateway 8 Communication network 9 Location information management system 161,261,361 Reception part 162,262,362 Detection part 163,263,363 Judgment Unit 164, 264, 364 measuring unit 165, 265, 365 transmitting / receiving unit 166, 266, 366 determining unit 167, 267, 367 measuring unit 168, 268, 368 storage / reading unit 169, 269, 369 storage unit 170, 270, 370 Calculation unit 171, 271, 371 Judgment unit 172, 272, 372 Display unit 291 Transmission / reception unit 292 Operation input reception unit 293 Search unit 294 Display control unit 298 Storage / reading unit 299 Storage unit 310 Conversion unit 321 Distribution unit 327 Communication unit 328 Storage Reading unit 329, storage unit 331, transmission / reception unit 37 communication unit 338 storing and reading unit 339 storage unit

JP 2012-145457 A

Claims (10)

A communication terminal that receives a positioning signal including the position information from a distribution device that distributes predetermined position information,
Calculating means for calculating position information representing the position of the communication terminal by relative positioning;
Measuring means for measuring the signal strength of the received positioning signal;
And the signal strength, and a predetermined signal strength threshold that is associated with the delivery position information of the distribution apparatus, on the basis of the position information indicating the current position of the communication terminal, is the position information of the calculation means has calculated Or determination means for determining whether the position information is included in the positioning signal;
A communication terminal. When the signal strength is equal to or greater than the predetermined signal strength threshold, the determination unit determines that the position information included in the positioning signal is position information indicating a current position of the communication terminal.
The communication terminal according to claim 1. When the signal strength is less than the predetermined signal strength threshold, the determination unit determines that the position information calculated by the calculation unit is position information indicating a current position of the communication terminal.
The communication terminal according to claim 2. When the determination unit continuously receives a positioning signal whose signal strength is equal to or greater than the predetermined signal strength threshold from the distribution device, the determination unit includes the position information included in the positioning signal, It is determined that the position information represents the current position of the communication terminal.
The communication terminal according to claim 2 or 3. When the positioning unit does not continuously receive a positioning signal whose signal strength is greater than or equal to the predetermined signal strength threshold from the distribution device, the determining unit determines the position information calculated by the calculating unit. Is position information representing the current position of the communication terminal,
The communication terminal according to claim 4. The unit representing the signal intensity is dBHz.
The communication terminal as described in any one of Claims 1 thru | or 5 . The positioning signal is configured based on a communication method compliant with the IMES standard.
The communication terminal according to any one of claims 1 to 6 . The predetermined signal strength threshold is:
The communication terminal according to claim 1, wherein the communication terminal is distributed from the distribution device together with position information distributed by the distribution device. A communication method executed by a communication terminal that receives a positioning signal including the position information from a distribution device that distributes predetermined position information,
A calculation stage for calculating position information representing the position of the communication terminal by relative positioning;
A measurement stage for measuring the signal strength of the received positioning signal;
It said signal strength, and a predetermined signal strength threshold associated with the position information to be distributed in the distribution device, based on the position information indicating the current position of the communication terminal, is the position information calculated in the calculating step Or a determination step of determining whether the position information is included in the positioning signal;
A communication method. The communication method according to 請 Motomeko 9, a program to be executed by the communication terminal.

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