JP2007110760A - Location information recognition system and method, wireless location information transmitter, and mobile terminal and its program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control output power of a wireless location information transmitter easily, and flexibly according to a change in the situation and the like. <P>SOLUTION: One of a plurality of adjacent wireless location information transmitters 10 compares an arrival range of a radio wave received from the other transmitters of the plurality of wireless location information transmitters and that of itself to determine whether there exists a radio wave non-arrival range or a radio wave collision range. If yes, the wireless location information transmitter determines an output power level of each of the other transmitters such that these ranges are reduced as much as possible, and sends the determined output power levels to the adjacent wireless location information transmitters. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a position information recognition system in which position information is transmitted from a device that transmits position information by radio waves to a portable terminal, and the portable terminal grasps the position based on the received position information.

  With the widespread use of mobile terminals that perform wireless communication, various applications (applications) using mobile terminals such as a navigation system that displays route guidance information on a display built in the mobile terminal are considered. Taking the navigation system as an example of the application, in the navigation system, the mobile terminal needs to grasp the position where the mobile terminal exists. As a method for grasping the position, there is a method for receiving a radio wave from a GPS satellite and grasping the position from information included in the radio wave.

  However, in a system using GPS, when a mobile terminal enters an underground shopping center or a valley of a building where radio waves from GPS satellites do not reach, the mobile terminal cannot recognize the position.

  Therefore, a plurality of devices (hereinafter referred to as wireless location information transmitters) that transmit location information by radio waves are installed within a predetermined service area, and mobile devices are installed based on information received by wireless communication from the wireless location information transmitter. A system in which a terminal grasps a position has been proposed (see, for example, Patent Document 1). In such a system, each wireless position information transmitter stores position information corresponding to the installation position, and each wireless position information transmitter transmits information indicating its own installation position. In addition, within a predetermined service area, at any point, the mobile terminal can receive radio waves from one or more radio location information transmitters. Output power is set. Note that “within a predetermined service area” is a set of ranges in which radio waves from each wireless location information transmitter reach.

JP 2002-44710 A (paragraphs 0024-0026, FIG. 1)

  In order to improve the accuracy of the position grasped by the mobile terminal or prevent radio wave interference between adjacent wireless position information transmitters, the output power of each wireless position information transmitter can be simply and It is necessary to control flexibly according to changes in the situation. However, such a mechanism is not incorporated in the conventional system described in Patent Document 1. Therefore, the accuracy of the position grasped by the mobile terminal cannot be easily changed. Radio interference refers to, for example, when radio signals from multiple radio location information transmitters are received in duplicate when adjacent radio location information transmitters are configured to transmit radio waves in the same frequency band. This means that there is a radio wave collision in that range.

  In the conventional system, control information can be sent to each wireless position information transmitter from an information input device such as a personal computer via a network or in a directly connected state. However, on the information input device side, it is difficult to determine how to change the output power of each wireless position information transmitter according to the situation, and the output power is an appropriate value depending on the situation. It takes time and effort to set to.

  Therefore, the present invention provides output power of each wireless position information transmitter in order to increase the accuracy of the position grasped by the mobile terminal or prevent radio wave interference between adjacent wireless position information transmitters. It is an object of the present invention to provide a position information recognition system, method, wireless position information transmitter, portable terminal, and program thereof that can be easily and flexibly controlled according to changes in the situation.

  The position information recognition system according to the present invention can move within a predetermined area in which wireless position information transmitters are provided, and a radio wave output for setting an output power level of a radio wave transmitted by each wireless position information transmitter. A management terminal for transmitting control information to a wireless location information transmitter is provided.

  In the position information recognition system according to another aspect of the present invention, each wireless position information transmitter includes another wireless position information transmitter or a mobile terminal device (the management terminal 20 and the mobile terminal 30 illustrated in FIG. 1). And control means for setting the output power level of the radio wave transmitted by the own device by performing wireless communication with the concept.

  According to still another aspect of the position information recognition system of the present invention, each wireless position information transmitter includes transmission means for transmitting information indicating an output power level in addition to the position information. When location information and information indicating the output power level are received from the location information transmitter, the user's own position is grasped based on the location information received from the wireless location information transmitter that has transmitted the information indicating the lowest output power level. A control unit is included.

  In another aspect of the position information recognition system according to the present invention, each wireless position information transmitter communicates with another wireless position information transmitter, so that the own apparatus or another wireless position information transmitter transmits information. And a control means for setting the timing to perform.

  The position information recognition system according to another aspect of the present invention includes a plurality of wireless position information transmitters each transmitting position information indicating an installation position of the own device and information indicating an output power level, and a plurality of portable terminal devices. A position information recognition system that grasps its own position based on position information received from any one of the wireless position information transmitters and information indicating the output power level, and each wireless position information transmitter has an output power level Is transmitted at a fixed time interval to transmit the position information and information indicating the output power level, and the mobile terminal device receives the position information received together with the information indicating the lowest output power level within a fixed time, It includes a control unit that grasps its own position based on information indicating the output power level.

  According to yet another aspect of the position information recognition system of the present invention, each wireless position information transmitter includes a transmission means for transmitting the information indicating the position information and the output power level by changing the output power level at a constant time interval. The information indicating the predetermined number of output power levels in the order of the lower output power level is included in the information indicating the output power level transmitted by the transmitting means of the plurality of wireless position information transmitters within a predetermined time. It includes a control unit that selects and grasps its own position based on information indicating the selected output power level and position information received together with information indicating the selected output power level.

  According to still another aspect of the position information recognition system of the present invention, the wireless position information transmitter includes transmission means for transmitting the information corresponding to the output power level by changing the output power level at regular time intervals. Features.

  According to another aspect of the position information recognition system of the present invention, the mobile terminal device determines the distance from the radio position information transmitter based on the intensity of the radio wave received from the radio position information transmitter and the information indicating the output power level. It is characterized by including the control part to grasp | ascertain.

  According to another aspect of the position information recognition system of the present invention, the mobile terminal device determines the distance from the radio position information transmitter based on the intensity of the radio wave received from the radio position information transmitter and the information indicating the output power level. It includes a control unit that grasps and recognizes its own position based on the position information received from the wireless position information transmitter and the grasped distance.

  According to another aspect of the position information recognition system of the present invention, a mobile terminal device includes a plurality of wireless position information transmitters based on the radio wave intensity received from a plurality of wireless position information transmitters and information indicating the output power level. And a control unit that grasps the position of each device based on the position information received from a plurality of wireless position information transmitters and the grasped distance.

  According to the position information recognition method of the present invention, radio position information transmitters can move within a predetermined area and receive radio wave output control information for setting the output power level of radio waves transmitted from each radio position information transmitter. The output power level is set according to the radio wave output control information received from the transmitting management terminal.

  According to another aspect of the position information recognition method of the present invention, the wireless position information transmitter performs wireless communication with another wireless position information transmitter or a portable terminal device, thereby allowing the output power level of the radio wave transmitted by itself to be determined. It is characterized by setting.

  The wireless location information transmitter communicates information indicating its own output power level or radio wave coverage with other wireless location information transmitters, and information received from other wireless location information transmitters Based on the information, the optimum output power level of each wireless location information transmitter (so that the range where radio waves from any of the wireless location information transmitters cannot reach is as small as possible, and a plurality of wireless location information transmitters The output power level set so as to minimize the range in which the radio waves from the radio waves are received in an overlapping manner may be determined.

  The wireless location information transmitter predicts the moving direction of the mobile terminal device by performing wireless communication with the mobile terminal device, and other wireless position information transmitters in the predicted moving direction increase the output power level. Also good.

  The wireless location information transmitter may grasp the distance from the mobile terminal device by performing wireless communication with the mobile terminal device, and lower the output power level as the distance increases.

  According to still another aspect of the position information recognition method of the present invention, each wireless position information transmitter transmits information indicating an output power level in addition to the position information, and the mobile terminal device includes a plurality of wireless position information transmitters. When receiving location information and information indicating the output power level from the base station, it is possible to grasp its own location based on the location information received from the wireless location information transmitter that has transmitted the information indicating the lowest output power level. To do.

  According to another aspect of the position information recognition method of the present invention, a plurality of wireless position information transmitters each transmit position information indicating their own installation position, and the mobile terminal device is transmitted from any of the plurality of wireless position information transmitters. A position information recognition method for grasping one's own position based on received position information, in which a wireless position information transmitter communicates with another wireless position information transmitter, thereby transmitting itself or other wireless position information. The transmitter is configured to set timing for transmitting information.

  According to another aspect of the position information recognition method of the present invention, a plurality of wireless position information transmitters each transmit position information indicating an installation position of the own apparatus and information indicating an output power level, and the mobile terminal device has a plurality of wireless position information. A position information recognition method for grasping one's position based on position information received from one of information transmitters and information indicating an output power level, wherein the wireless position information transmitter sets the output power level at regular time intervals. Based on the positional information received by the portable terminal device together with the information indicating the lowest output power level within a certain time and the information indicating the output power level. It is characterized by grasping its own position.

  According to still another aspect of the position information recognition method of the present invention, the wireless position information transmitter transmits the information indicating the position information and the output power level by changing the output power level at a constant time interval. Select information indicating a predetermined number of output power levels in ascending order of output power level from among the information indicating output power levels transmitted by the transmitting means of a plurality of radio position information transmitters within a certain time, and selecting the selected output It is characterized in that its own position is grasped based on the information indicating the power level and the positional information received together with the information indicating the selected output power level.

  The position information recognition method according to still another aspect of the present invention is characterized in that the wireless position information transmitter transmits information corresponding to the output power level by changing the output power level at regular time intervals.

  According to another aspect of the position information recognition method of the present invention, the mobile terminal device determines the distance from the radio position information transmitter based on the intensity of the radio wave received from the radio position information transmitter and the information indicating the output power level. It is characterized by grasping.

  According to another aspect of the position information recognition method of the present invention, the mobile terminal device determines the distance from the radio position information transmitter based on the intensity of the radio wave received from the radio position information transmitter and the information indicating the output power level. It is characterized by grasping and grasping its own position based on the position information received from the wireless position information transmitter and the grasped distance.

  According to another aspect of the position information recognition method of the present invention, a mobile terminal device is configured to use a plurality of wireless position information transmitters based on information indicating the strength of radio waves received from a plurality of wireless position information transmitters and output power levels. It is characterized by grasping the distance from each other and grasping its own position based on the position information received from a plurality of wireless position information transmitters and the grasped distance.

  The wireless position information transmitter according to the present invention is a wireless position information transmitter that transmits position information indicating the installation position of the own device, and performs wireless communication with another wireless position information transmitter or a portable terminal device. Is provided with a control means for setting the output power level of the radio wave transmitted by.

  A portable terminal device according to the present invention is a portable terminal device that grasps its own position based on position information received from any of a plurality of wireless position information transmitters, and includes position information and When receiving information indicating the output power level, a control unit is provided that grasps its own position based on the position information received from the wireless position information transmitter that has transmitted the information indicating the lowest output power level. And

  A portable terminal device according to another aspect of the present invention includes a control unit that grasps a distance from a wireless position information transmitter based on the intensity of a radio wave received from the wireless position information transmitter and information indicating an output power level. It is characterized by that.

  According to another aspect of the mobile terminal device of the present invention, the distance from the wireless position information transmitter is determined based on the intensity of the radio wave received from the wireless position information transmitter and the information indicating the output power level. It is characterized by comprising a control unit that grasps its own position based on the position information received from the transmitter and the grasped distance.

  According to another aspect of the mobile terminal device of the present invention, the distance from a plurality of radio position information transmitters is grasped based on the intensity of radio waves received from the plurality of radio position information transmitters and information indicating the output power level. And a control unit that grasps its own position based on the position information received from a plurality of wireless position information transmitters and the grasped distance.

  The program according to the present invention is a program installed in a portable terminal device, and when a computer installed in the portable terminal device receives information indicating position information and output power level from a plurality of wireless position information transmitters. Further, the present invention is characterized in that a process for grasping its own position is executed based on position information received from a wireless position information transmitter that has transmitted information indicating the lowest output power level.

  According to another aspect of the present invention, there is provided a program installed in a mobile terminal device, which is a radio location information transmitter based on the intensity of radio waves received from a radio location information transmitter and information indicating an output power level. It is comprised so that the process which grasps | ascertains the distance from may be performed.

  According to another aspect of the present invention, there is provided a program installed in a mobile terminal device, which is a radio location information transmitter based on the intensity of radio waves received from a radio location information transmitter and information indicating an output power level. It is characterized in that it is configured to execute a process of grasping its own position based on the position information received from the wireless position information transmitter and the grasped distance.

  A program according to another aspect of the present invention is a program installed in a mobile terminal device, and a plurality of radios based on the intensity of radio waves received from a plurality of radio position information transmitters and information indicating an output power level. It is configured to grasp the distance from each location information transmitter, and execute the process to grasp its own location based on the location information received from multiple wireless location information transmitters and the grasped distance. It is characterized by.

  ADVANTAGE OF THE INVENTION According to this invention, in the positional information recognition system which grasps | ascertains a position based on the positional information which the portable terminal received, the precision of the positional information which a portable terminal grasps | ascertains can be improved. This is because the output power of each wireless location information transmitter can be easily and flexibly controlled in accordance with changes in the situation. Accordingly, seamless positioning of the mobile terminal (in other words, the position can always be accurately grasped while moving) can be realized, and the management cost of the position information recognition system can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a system configuration diagram showing an apparatus arrangement example in a position information recognition system according to the present invention. As shown in FIG. 1, a large number (three in the illustration of FIG. 1) of wireless position information transmitters 10 are fixedly installed in a predetermined service area. The wireless location information transmitter 10 holds location information and other information that can identify the installation location. Then, position information and other information are transmitted by radio waves. When the management terminal 20 and the portable terminal 30 are carried by the user and enter the radio wave arrival range from any one of the wireless position information transmitters 10 illustrated by the broken-line circle in FIG. Location information and other information can be received. Based on the information received from the wireless location information transmitter 10, the management terminal 20 and the portable terminal 30 grasp the position where the self exists.

  The management terminal 20 transmits the position information and other information to the wireless position information transmitter 10 by wireless communication and retains the information, and updates the information held by the wireless position information transmitter 10 It has the function to do. In addition, the management terminal 20 has a function of transmitting a control signal for controlling the output power of the radio wave of the wireless location information transmitter 10 and a control signal for inquiring existence to the wireless location information transmitter 10.

  FIG. 2 is a block diagram illustrating a configuration example of the wireless position information transmitter 10. In the example illustrated in FIG. 2, a high-frequency signal based on the radio wave received by the antenna 11 is received by the wireless unit 12. The radio unit 12 converts the received signal into a low frequency signal and outputs the signal to the receiving unit 14. The receiving unit 14 performs demodulation processing or the like on the input signal and outputs the obtained data (digital signal) to the control unit 15. The control unit 15 is configured by a microcomputer, for example, and performs control according to data input from the reception unit 14. If the data input from the receiving unit 14 is data indicating position information or other information, the data is stored in the storage unit 16.

  Further, the control unit 15 periodically outputs data indicating position information and the like to the transmission unit 13 at a predetermined time interval. The transmission unit 13 performs modulation processing on the input data and outputs a signal to the radio unit 12. The radio unit 12 converts the input signal into a high-frequency signal and outputs it to the antenna 11. The antenna 11 transmits a radio wave based on a high frequency signal. The transmission unit 13 includes a transmission power amplifier 13A that can change the amplification factor. The control unit 15 outputs a control signal corresponding to a predetermined output power level stored in the storage unit 16 to the transmission power amplifier 13A. The transmission power amplifier 13A sets the amplification factor according to the control signal so that the output power level of the transmitted radio wave becomes a predetermined output power level. Note that there is no need to constantly output a control signal from the control unit 15 to the transmission power amplifier 13A, and the control signal from the control unit 15 is latched in the transmission unit 13.

  In addition, the output power level stored in the storage unit 16 is set to an initial value when the wireless location information transmitter 10 is installed, but can be changed based on information transmitted from the management terminal 20 thereafter. is there.

  FIG. 3 is a block diagram illustrating a configuration example of the management terminal 20. In the example illustrated in FIG. 3, the radio unit 22 receives a high-frequency signal based on the radio wave received by the antenna 21. The radio unit 22 converts the received signal into a low-frequency signal and outputs the signal to the transmission / reception unit 23. The transmission / reception unit 23 performs demodulation processing or the like on the input signal and outputs the obtained data (digital signal) to the control unit 25. The control unit 25 is configured by a microcomputer, for example, and grasps its own position based on data input from the transmission / reception unit 23. Further, data indicating the grasped position is stored in the storage unit 26.

  In addition, the control unit 25 receives position information and other information held by the wireless position information transmitter 10 in response to an operation of a user of the management terminal 20 or an instruction from a server (not shown in FIG. 1). Is output to the transmitting / receiving unit 23. The transmission / reception unit 23 performs modulation processing on the input data and outputs a signal to the radio unit 22. The radio unit 22 converts the input signal into a high frequency signal and outputs it to the antenna 21. The antenna 21 transmits a radio wave based on the high frequency signal to the wireless position information transmitter 10. Note that there is an output power level as information other than the position information held by the wireless position information transmitter 10.

  Furthermore, the management terminal 20 includes an input unit 27 having a numeric keypad for a user to operate, and a display unit 28 having, for example, an LCD (Liquid Crystal Display).

  When the control unit 25 is constituted by a microcomputer, the microcomputer executes control according to the program, but instructs the radio position information transmitter 10 to send information to at least the program. A program for performing a process of inputting a signal indicating the content of the operation from the input unit 27 and outputting information corresponding to the input signal to the transmission / reception unit 23 when the user performs an operation on the input unit 27; And a program for performing processing for outputting information in accordance with an instruction from the server to the transmission / reception unit 23.

  FIG. 4 is a block diagram illustrating a configuration example of the mobile terminal 30. In the example shown in FIG. 4, the radio unit 32 receives a high-frequency signal based on the radio wave received by the antenna 31. The radio unit 32 converts the received signal into a low frequency signal and outputs the signal to the transmission / reception unit 33. The transmission / reception unit 33 performs demodulation processing or the like on the input signal and outputs the obtained data (digital signal) to the control unit 35. The control unit 35 is configured by a microcomputer, for example, and grasps its own position based on data input from the transmission / reception unit 33. Further, data indicating the grasped position is stored in the storage unit 36.

  Furthermore, the portable terminal 30 includes an input unit 37 having a numeric keypad for a user to operate, and a display unit 38 having, for example, an LCD (Liquid Crystal Display).

  The portable terminal 30 incorporates an application program for displaying road guidance information as an example. Such an application program may be fixedly incorporated in the mobile terminal 30 or downloaded from a predetermined application program providing device when the user of the mobile terminal 30 needs route guidance. Also good. Then, the control unit 35 causes the display unit 38 to display the route of the route guidance information and the current position based on the application program and the grasped position information.

  Further, since the management terminal 20 has all the functions of the mobile terminal 30, the user (administrator) of the management terminal 20 can use the same way as the mobile terminal 30, but the administrator Carrying the terminal 20 and moving appropriately within the service area, the output power control of the wireless location information transmitter 10 as described below is performed.

  The wireless position information transmitter 10 may transmit information indicating an absolute position (for example, information indicating an absolute position within a service area) as position information, or information indicating a relative position. May be sent. As information indicating the relative position, for example, there is identification information (ID information) uniquely assigned to each wireless position information transmitter 10. Since the wireless location information transmitter 10 is fixedly installed, the management terminal 20 and the mobile terminal 30 can specify the location of the wireless location information transmitter 10 from the ID information.

  For example, the management terminal 20 and the mobile terminal 30 directly use the position indicated by the position information received from the wireless position information transmitter 10 as its own position. When position information is received from a plurality of wireless position information transmitters 10, one wireless position information transmitter 10 is selected from the plurality of wireless position information transmitters 10 according to a predetermined rule, and the selected wireless information is transmitted. The position indicated by the position information received from the position information transmitter 10 may be used as it is. As a rule determined in advance, for example, there is a rule such as selecting a radio location information transmitter 10 that has transmitted a received radio wave having the highest received electric field strength, or as shown in a ninth embodiment to be described later. Further, the management terminal 20 and the mobile terminal 30 may calculate their own position from the position information received from the plurality of wireless position information transmitters 10.

  The communication between the wireless location information transmitter 10 and the management terminal 20 and the portable terminal 30 is realized by, for example, low power communication based on various standards of Bluetooth (registered trademark) and wireless LAN.

  Hereinafter, output power control of the wireless position information transmitter 10 in the system illustrated in FIG. 1 will be described.

Embodiment 1 FIG.
FIG. 5 is an explanatory diagram for explaining the first embodiment of the output power control of the wireless position information transmitter 10. 1st Embodiment is a form which performs static output power control which changes the output power of the radio | wireless location information transmitter 10 according to the instruction | indication of the management terminal 20. FIG. That is, the management terminal 20 transmits information indicating the changed output power level to the wireless position information transmitter 10 as the radio wave output control information. The method of transmitting information at the management terminal 20 and the method of receiving information at the wireless location information transmitter 10 are as described above. In the wireless position information transmitter 10, the control unit 15 causes the storage unit 16 to store the output power level indicated by the received information. Thereafter, the control unit 15 outputs a control signal corresponding to the new output power level stored in the storage unit 16 to the transmission power amplifier 13A. The transmission power amplifier 13A sets the amplification factor according to the control signal so that the output power of the transmitted radio wave becomes the output power level indicated by the control signal.

Embodiment 2. FIG.
FIG. 6 is an explanatory diagram for explaining a second embodiment of output power control of the wireless position information transmitter 10. In the second embodiment, the server 40 calculates the optimum output power of each wireless position information transmitter 10 and transmits the calculation result to the management terminal 20 as radio wave output control information.

  The server 40 stores information indicating the installation position of each wireless position information transmitter 10 in the storage unit 50. That is, the installation position of each wireless position information transmitter 10 is grasped. Based on the installation position of the wireless location information transmitter 10, the server 40, for example, as shown in FIG. , The radio wave non-arrival range) is as small as possible, and the range in which radio waves from a plurality of radio position information transmitters 10 are received in duplicate (hereinafter referred to as radio wave collision ranges) is as small as possible. In addition, the intensity of the radio wave, that is, the output power of each radio position information transmitter 10 is determined. The output power level set so that the radio wave non-arrival range is as small as possible and the radio wave collision range is as small as possible is hereinafter referred to as the optimum output power level. In FIG. 7, the inside of a circle indicated by reference numeral 100 indicates a radio wave reachable range.

  The server 40 transmits the information indicating the output power level of each wireless position information transmitter 10 to the management terminal 20 by radio communication directly or via a relay facility that performs wired communication with the server 40. Send as. The control unit 25 of the management terminal 20 temporarily stores the received information in the storage unit 26. Then, the administrator inputs an instruction to transmit information indicating the output power level stored in the storage unit 26 to the input unit 27. The control unit 25 of the management terminal 20 transmits information indicating the output power level to the wireless position information transmitter 10 as in the case of the first embodiment. Note that the control unit 25 of the management terminal 20 receives the radio wave output control information from the server 40 without waiting for a transmission instruction from the administrator, and immediately transmits information indicating the output power level to each wireless position information transmitter. 10 may be transmitted. When the output power level of the management terminal 20 is less than the level that causes the information indicating the output power level to reach all the radio position information transmitters 10 to be transmitted, the administrator Carry around the service area.

Embodiment 3 FIG.
FIG. 8 is an explanatory diagram for explaining the third embodiment of the output power control of the wireless position information transmitter 10. In the third embodiment, a communication network 200 is provided in which the respective wireless position information transmitters 10 can communicate with each other, and radio wave output control is performed between position information indicating an installation position and information indicating an output power level. It can be exchanged as information.

  For example, when the wireless position information transmitter 10 is installed, each wireless position information transmitter 10 transmits position information and other information at an output power level set as an initial value. Therefore, the output power level of each radio position information transmitter 10 is not always the optimum output power level. Therefore, the control unit 15 in the wireless location information transmitter 10 communicates with another wireless location information transmitter 10 via the communication network 200, and indicates the location information and output power level of the other wireless location information transmitter 10. Receive information and. In the present embodiment, in contrast to the configuration shown in FIG. 2, the wireless location information transmitter 10 further includes an interface unit for performing communication via the communication network 200.

  The control unit 15 of the wireless position information transmitter 10 that has received the position information of the other wireless position information transmitter 10 and the information indicating the output power level compares the own position information with the received position information, and The radio position information transmitters 10 to be identified are specified, and the radio wave arrival ranges of the radio position information transmitters 10 are calculated from the output power levels of the adjacent wireless position information transmitters 10. In addition, the radio wave reachable range of its own radio wave is calculated from its own output power level. For example, the radio wave arrival distance for various output power levels is measured in advance, and the relationship between the output power level and the radio wave arrival distance is set as a table in the storage unit 16 in advance. Then, the radio wave arrival distance corresponding to the actually used output power level is extracted, and the extracted radio wave arrival distance is set as the outer edge of the radio wave arrival range (corresponding to a circle indicated by a broken line in FIG. 8). When a value matching the output power level is not set in the table, the radio wave arrival distance is calculated by interpolation from the radio wave arrival distances corresponding to the upper and lower values (output power level).

  Then, the radio wave arrival ranges are compared to determine whether there is a radio wave non-arrival range and a radio wave collision range. If they exist, the output power level of each radio position information transmitter 10 that makes the range as small as possible is determined, and the determined output power level is transmitted to the adjacent radio position information via the communication network 200. To the machine 10. In the wireless position information transmitter 10 that has received the output power level, the received output power level is written into the storage unit 16 by the control unit 15. Thereafter, the control unit 15 outputs a control signal indicating the output power level newly written in the storage unit 16 to the transmission power amplifier 13A.

  As described above, in this embodiment, each wireless position information transmitter 10 performs wireless communication with another wireless position information transmitter 10 to set the output power level of the radio wave transmitted by the own device. . Also, each wireless location information transmitter 10 is online networked and can autonomously set the output power level to the optimum output power level. That is, the output power level of the wireless position information transmitter 1 can be easily controlled.

  Here, although a wired transmission path is assumed as the communication network 200, a wireless transmission path may be used as the communication network 200.

  In addition, one wireless position information transmitter 10 among a plurality of wireless position information transmitters 10 adjacent to each other determines each output power level. Which wireless position information transmitter 10 determines the output power level. Whether or not to determine is determined in advance by assigning priorities to the plurality of radio position information transmitters 10.

Embodiment 4 FIG.
FIG. 9 is an explanatory diagram for explaining a fourth embodiment of output power control of the wireless position information transmitter 10. In the fourth embodiment, each wireless location information transmitter 10 grasps the moving direction of the moving management terminal 20 or mobile terminal 30. A plurality of wireless location information transmitters 10 autonomously predicts which wireless location information transmitter 10 will be the communication partner of management terminal 20 or portable terminal 30 in the future, and is predicted to become a communication partner. The radio position information transmitter 10 thus raised increases the output power level. In addition, since the portable terminal 30 is illustrated in FIG. 9, the portable terminal 30 is taken as an example in the following description.

  In this embodiment, in order for the wireless location information transmitter 10 to grasp the moving direction of the mobile terminal 30, it is recognized that the mobile terminal 30 exists within the radio wave reachable range (hereinafter referred to as being in the service area). There is a need to. Therefore, the wireless location information transmitter 10 needs to receive some information from the portable terminal 30. For example, the mobile terminal 30 may have a service range according to the inquiry information from the wireless position information transmitter 10 at an appropriate time interval or when the wireless position information transmitter 10 is configured to transmit the inquiry information. The self ID information is transmitted. When receiving the ID information, the control unit 15 of the wireless location information transmitter 10 registers it in the storage unit 16. If the ID information cannot be received for a predetermined period or longer, it is determined that the mobile terminal 30 corresponding to the ID information has left the radio wave reachable range (no longer located), and the ID information is stored in the storage unit 16. Erase from

  As the management terminal 20 or the mobile terminal 30, a mobile phone equipped with a low-power wireless communication function such as a Bluetooth function and an application program for grasping position information is used in addition to a general PDA or a dedicated terminal. However, when a mobile phone is used, a telephone number can be used as the ID information.

  The wireless location information transmitter 10 transmits the ID information registered in the storage unit 16 to the other wireless location information transmitter 10 via the communication network 200 as radio wave output control information. The wireless location information transmitter 10 adjacent to the wireless location information transmitter 10 that transmitted the ID information increases the output power level. Further, the wireless position information transmitter 10 that is not adjacent to the wireless position information transmitter 10 that transmitted the ID information does not increase the output power level. In this embodiment, the radio location information transmitter 10 is in a state of not transmitting radio waves, for example, before raising the output power level.

  As described above, each wireless position information transmitter 10 transmits itself by performing wireless communication with a mobile terminal device (a concept including the management terminal 20 and the mobile terminal 30 illustrated in FIG. 1). Set the output power level of the radio wave to be played. Then, the plurality of wireless position information transmitters 10 perform the above control, so that the wireless position information transmitters 10 that transmit radio waves autonomously change as the mobile terminal 30 moves. Will go. As a result, power consumption can be reduced as a whole system.

  Here, the wireless location information transmitter 10 that will be the communication partner of the mobile terminal 30 in the future is the wireless location information transmitter 10 adjacent to the wireless location information transmitter 10 that transmitted the ID information. Thus, the wireless location information transmitter 10 that will be a communication partner of the mobile terminal 30 may be predicted. For example, when a plurality of wireless position information transmitters 10 are two-dimensionally arranged, the control unit 15 of the wireless position information transmitter 10 in which the mobile terminal 30 is currently located is connected to the past mobile terminal 30. The movement direction is calculated by collecting the movement history (information indicating which radio position information transmitter 10 has been in the area) from the other radio position information transmitters 10, and the radio wave arrival range on the calculated movement direction It is predicted that the wireless position information transmitter 10 having the wireless position information transmitter 10 that will be the communication partner of the mobile terminal 30 in the future. And it notifies to the radio | wireless location information transmitter 10 which is a prediction result via the communication network 200. FIG. Receiving the notification, the wireless location information transmitter 10 increases the output power level.

  Here, a wired transmission path is assumed as the communication network 200, but a wireless transmission path may be used as the communication network 200.

Embodiment 5. FIG.
FIG. 10 is an explanatory diagram for explaining a fifth embodiment of output power control of the wireless position information transmitter 10. In the fifth embodiment, the wireless position information transmitters 10 exchange information indicating their own radio wave arrival ranges, and determine the optimal radio wave arrival range based on the received information. In the third embodiment, each of the wireless position information transmitters 10 exchanges the position information indicating the installation position and the information indicating the output power level. The information shown is exchanged as radio wave output control information.

  For example, one of the plurality of adjacent wireless location information transmitters 10 compares the radio wave arrival range received from the other radio location information transmitters 10 with its own radio wave arrival range. Then, it is determined whether a radio wave non-arrival range and a radio wave collision range exist. If they exist, the output power level of each radio position information transmitter 10 that makes the range as small as possible is determined, and the determined output power level is transmitted to the adjacent radio position information via the communication network 200. To the machine 10. In the wireless position information transmitter 10 that has received the output power level, the received output power level is written into the storage unit 16 by the control unit 15. Thereafter, the control unit 15 outputs a control signal indicating the output power level newly written in the storage unit 16 to the transmission power amplifier 13A. Each radio location information transmitter 10 can calculate the radio wave reachable range of its own radio wave from its own output power level, for example, as in the case of the third embodiment.

  Therefore, as illustrated in FIG. 10A, when the output power level is higher than the optimum output power level, the output power level is lowered. As illustrated in FIG. 10B, when the output power level is lower than the optimum output power level, the output power level is increased. FIG. 10B shows an example in which the middle wireless position information transmitter 10 is stopped. This embodiment is particularly significant when a paused wireless position information transmitter 10 occurs as illustrated in FIG. 10B or when the wireless position information transmitter 10 is added.

  As described above, in this embodiment, each wireless position information transmitter 10 performs wireless communication with other wireless position information transmitters 10 to autonomously set the output power level of radio waves. In this embodiment, the radio wave reachable range is calculated from its own output power level, but may be calculated by other methods.

Embodiment 6 FIG.
FIG. 11 is an explanatory diagram for explaining a sixth embodiment of output power control of the wireless position information transmitter 10. In the sixth embodiment, the wireless location information transmitter 10 increases the output power level according to information (inquiry information) inquiring about the presence from the management terminal 20.

  For example, the control unit 25 of the management terminal 20 transmits inquiry information via the transmission / reception unit 23 and the wireless unit 22 when radio waves cannot be received from any of the wireless location information transmitters 10 within the service area. The control unit 15 in the wireless location information transmitter 10 that has received the inquiry information controls to increase the output power level.

  By such control, when there is a radio wave non-arrival range, it is possible to eliminate the radio wave non-arrival range by simply sending inquiry information from the management terminal 20.

Embodiment 7 FIG.
FIG. 12 is an explanatory diagram for explaining a seventh embodiment of output power control of the wireless position information transmitter 10. In the seventh embodiment, the wireless location information transmitter 10 stops the transmission of radio waves when the management terminal 20 or the mobile terminal 30 is not in the service area. In FIG. 12, since the mobile terminal 30 is illustrated, the mobile terminal 30 will be described below as an example.

  In order to recognize that the mobile terminal 30 is located, the wireless location information transmitter 10 needs to receive some information from the mobile terminal 30. Therefore, for example, as in the case of the fourth embodiment, the mobile terminal 30 transmits its own ID information at an appropriate time interval. The control unit 15 of the wireless location information transmitter 10 determines that the mobile terminal 30 is no longer in the area when the ID information cannot be received for a predetermined period or longer. When the mobile terminal 30 is no longer in the service area, the control unit 15 of the wireless location information transmitter 10 controls to stop the transmission of radio waves. Also in the fourth embodiment, it is preferable that the wireless location information transmitter 10 in which the mobile terminal 30 is no longer in service stop transmitting radio waves.

Embodiment 8 FIG.
FIG. 13 is an explanatory diagram for explaining an eighth embodiment of output power control of the wireless position information transmitter 10. In the sixth embodiment, the control unit 15 in the wireless location information transmitter 10 that has received the inquiry information from the management terminal 20 is controlled to increase the output power level. However, in the eighth embodiment, Compared to the embodiment, the output power level is increased less, and control is performed so that the output power level gradually increases.

  That is, the user (administrator) of the management terminal 20 causes the management terminal 20 to transmit command information to the wireless position information transmitter 10 from a position away from the wireless position information transmitter 10 by a predetermined distance. The position separated by a predetermined distance is, for example, a position that is to be determined as the outer edge of the optimum radio wave reachable range based on the optimum output power level. The control unit 15 of the wireless position information transmitter 10 that has received the command information controls the output power level to be increased by a predetermined amount. The control unit 25 of the management terminal 20 transmits the command information when the position information or the like can be received from the wireless position information transmitter 10, that is, when the radio wave can be received from the wireless position information transmitter 10. Stop.

  When the command information is still received after increasing the output power level, the control unit 15 of the wireless location information transmitter 10 controls to further increase the output power level. Such control is repeated until command information cannot be received. And the control part 15 of the radio | wireless position information transmitter 10 memorize | stores the output power level when command information becomes impossible to receive in the memory | storage part 16, and transmits a radio wave with the output power level after that.

  By such control, it is possible to easily set the output power level corresponding to the optimum radio wave arrival range, that is, the optimum output power level.

Embodiment 9 FIG.
FIG. 14 is an explanatory diagram for explaining the ninth embodiment. In the ninth embodiment, the control unit 15 of each wireless position information transmitter 10 periodically transmits radio wave output control information via the transmission unit 13 and the wireless unit 12 in addition to the position information. It also serves as a means. In this embodiment, the radio wave output control information is information indicating the output power level at that time. Note that the timing at which each wireless position information transmitter 10 transmits position information and radio wave output control information is shifted.

  When the management terminal 20 or the mobile terminal 30 receives position information and radio wave output control information from the plurality of radio position information transmitters 10, the control unit 25 or the control unit 35 has an output power level indicated by the radio wave output control information. The position information from the wireless position information transmitter 10 that has transmitted the lowest radio wave output control information is selected as position information indicating its own position. In FIG. 14, the mobile terminal 30 is illustrated.

  The wireless position information transmitter 10 that has transmitted the radio wave output control information indicating the lowest output power level is likely to be in a position closest to the management terminal 20 or the mobile terminal 30 that has received the information. The radio wave position information transmitter 10 with a high output power level has a wide radio wave reachable range, and the radio wave position information transmitter 10 with a low output power level has a narrow radio wave reachable range. This is because there is a high possibility that the distance from the terminal 20 or the portable terminal 30 to the wireless position information transmitter 10 corresponding to a narrow radio wave reachable range is shorter.

  Therefore, according to this embodiment, it can be expected that the accuracy of the position information grasped by the management terminal 20 or the portable terminal 30 is improved. In addition, the control part 25 and the control part 35 of the management terminal 20 and the portable terminal 30 show the lowest output power level when receiving the information indicating the position information and the output power level from the plurality of radio position information transmitters 10. Based on the position information received from the wireless position information transmitter 10 that has transmitted the information, a process for grasping its own position is executed. Further, when the control unit 25 and the control unit 35 are constituted by a microcomputer, a program for causing the CPU to execute such processing is installed.

Embodiment 10 FIG.
FIG. 15 is an explanatory diagram for explaining a tenth embodiment of output power control of the wireless position information transmitter 10. As described above, in the ninth embodiment, it is preferable that the timings at which the respective radio position information transmitters 10 transmit the position information and the radio wave output control information are shifted, but the tenth embodiment Then, each wireless position information transmitter 10 autonomously sets the transmission timing.

  Each wireless position information transmitter 10 mutually exchanges information indicating the transmission timing as radio wave output control information. At least one of the plurality of adjacent wireless position information transmitters 10 includes information indicating the transmission timing received from the other wireless position information transmitters 10 and information indicating its own transmission timing. When there is an overlap, it is decided to shift the transmission timing of the self or to shift the transmission timing of another radio position information transmitter 10 so that the overlap is eliminated. When it is determined to shift the transmission timing of the other wireless position information transmitter 10, the determination result is transmitted to the other wireless position information transmitter 10.

  The communication between the wireless location information transmitters 10 may be performed via the communication network 200 as described above, or may be performed by a wireless transmission path.

  In addition, one wireless position information transmitter 10 among the plurality of wireless position information transmitters 10 adjacent to each other determines each transmission timing, and which wireless position information transmitter 10 determines the transmission timing. Is determined in advance by assigning priorities to the plurality of radio position information transmitters 10.

Embodiment 11 FIG.
FIG. 16 is an explanatory diagram for explaining an eleventh embodiment of output power control of the wireless position information transmitter 10. In the eleventh embodiment, the wireless location information transmitter 10 dynamically controls the output power level as the management terminal 20 or the mobile terminal 30 moves. Since the mobile terminal 30 is illustrated in FIG. 16, the following description will be given by taking the mobile terminal 30 as an example.

  In this embodiment, the radio location information transmitter 10 includes a received electric field strength (RSSI) measurement circuit in addition to the configuration shown in FIG. A measurement value obtained by the RSSI measurement circuit is input to the control unit 15. In the wireless position information transmitter 10, for example, the relationship between various measurement values and output power levels is set in the storage unit 16. The relationship is such that the smaller the measured value, the higher the output power level.

  In order to recognize that the mobile terminal 30 is located, the wireless location information transmitter 10 needs to receive some information from the mobile terminal 30. Therefore, for example, as in the case of the fourth embodiment, the mobile terminal 30 transmits its own ID information at an appropriate time interval.

  The control unit 15 of the wireless location information transmitter 10 inputs the measurement value of the RSSI measurement circuit based on the reception of information from the portable terminal 30 and extracts the output power level corresponding to the measurement value from the storage unit 16. Then, a control signal corresponding to the extracted output power level is output to the transmission power amplifier 13A.

  With such control, as the mobile terminal 30 moves away from the wireless location information transmitter 10, the output power level increases, and location information and the like can be reliably transmitted to the mobile terminal 30 in the area. The power consumption of the wireless location information transmitter 10 can be reduced.

  Note that the control as described above in the wireless position information transmitter 10 is stopped when the measured value of the RSSI measuring circuit becomes smaller than a predetermined value. The predetermined value determined in advance is, for example, the RSSI of the radio wave transmitted by the mobile terminal 30 at the outer edge of the optimum radio wave reachable range as described in the eighth embodiment.

Embodiment 12 FIG.
FIG. 17 is an explanatory diagram for explaining a twelfth embodiment of output power control of the wireless location information transmitter 10.

  In the third embodiment, the fifth embodiment, and the tenth embodiment, communication of radio wave output control information is performed between the wireless position information transmitters 10. That is, in the third embodiment, the position information and the information indicating the output power level are exchanged between the wireless position information transmitters 10. Further, in the fifth embodiment, information indicating the radio wave reachable range is exchanged between the wireless position information transmitters 10. In the tenth embodiment, information indicating the transmission timing is exchanged. Furthermore, in 4th Embodiment, there existed an example which transmits the ID information of the management terminal 20 or the portable terminal 30 in the area to the other radio | wireless position information transmitter 10. FIG.

  As described above, when the radio wave output control information is communicated between the wireless position information transmitters 10, the wireless transmission path can be used. In this case, the transmitter 13 shown in FIG. When transmitting information to another wireless location information transmitter 10 using the wireless unit 12 as it is, the output power level is increased so that the radio wave reaches the adjacent wireless location information transmitter 10 only in that case. Keep it.

  As described above, since information is autonomously exchanged between the wireless location information transmitters 10 via the wireless transmission path, the wireless location information transmitter 10 connected through the wireless transmission path forms a kind of ad hoc network. To do.

Embodiment 13 FIG.
FIG. 18 is an explanatory diagram for explaining a thirteenth embodiment of output power control of the wireless position information transmitter 10.

  The wireless location information transmitter 10 according to the thirteenth embodiment transmits location information and information indicating the output power level (hereinafter referred to as radio wave intensity information) at different output power levels at regular time intervals.

  The radio wave intensity information is information that can quantitatively grasp the strength (output power level) of the radio wave to be transmitted, and is, for example, the transmission power value of the wireless position information transmitter 10.

  Then, the management terminal 20 or the portable terminal 30 can grasp the radio wave reach distance based on the value of the radio wave intensity information. Specifically, for example, the radio wave arrival distances for various output power levels are measured in advance, and the relationship between the output power level and the radio wave arrival distance is set as a table in advance in a storage unit (not shown). . Then, the radio wave arrival distance corresponding to the output power level indicated by the received radio wave intensity information is extracted to grasp the radio wave arrival distance.

  Here, it is assumed that the smaller the value of the radio wave intensity information, the lower the output power level of the radio wave transmitted by the wireless position information transmitter 10, the short radio wave reach distance, and the narrow radio wave reach range.

  The management terminal 20 or the portable terminal 30 grasps the position of the own device based on the lowest value of the plurality of radio field intensity information received within a certain period of time and the position information received together therewith.

  Specifically, the management terminal 20 or the portable terminal 30 grasps the distance from the radio location information transmitter 10 based on the radio field intensity information having the smallest value among a plurality of radio field intensity information received within a certain period of time. It is determined that the radio wave reachable distance.

  In the example of FIG. 18, the management terminal 20 could not receive the radio wave intensity information transmitted by the wireless location information transmitter 10 at 1 mW at time T1, but the wireless location information transmitter 10 at 10 mW at time T2. It shows that the transmitted radio field intensity information and the radio field information transmitter 10 transmitted at 100 mW at time T3 could be received.

  In such a case, the management terminal 20 determines that the radio field information transmitter 10 has a radio wave arrival distance of 10 mW that is the radio wave intensity information having the smallest value among the received radio wave intensity information. .

  And the management terminal 20 grasps | ascertains the position of an own machine based on the radio wave information distance of 10 mW, and the positional information received from the radio | wireless positional information transmitter 10. FIG.

  Therefore, according to this embodiment, since the management terminal 20 or the portable terminal 30 grasps the position of the own apparatus based on the position information and the radio wave intensity information transmitted by the wireless position information transmitter 10, It can be expected that the accuracy of the position is improved.

  In addition, when the received radio wave intensity information is one type, the management terminal 20 or the mobile terminal 30 grasps the position of the own device based on the radio wave intensity information.

Embodiment 14 FIG.
FIG. 19 is an explanatory diagram for describing a fourteenth embodiment of output power control of the wireless location information transmitter 10.

  As described above, in the thirteenth embodiment, the management terminal 20 or the mobile terminal 30 uses the position information and the radio wave intensity information transmitted from the one wireless position information transmitter 10 at different output power levels at regular time intervals. Based on the above, the position of the aircraft is grasped. On the other hand, in the fourteenth embodiment, the management terminal 20 or the mobile terminal 30 includes the position information and the radio wave intensity information transmitted from the plurality of wireless position information transmitters 10 at different output power levels at regular time intervals. Based on this, grasp the position of the aircraft.

  Specifically, for example, a plurality of radio wave intensity information transmitted from different radio position information transmitters 10 from a plurality of radio wave intensity information received within a predetermined time, and a plurality of radio wave intensity information (for example, in ascending order) (for example, 3) and based on the selected radio field intensity information, the distance from each radio position information transmitter 10 that has transmitted them is grasped. And based on the grasped distance and the positional information received together with the extracted radio wave intensity information, the position of the own device is calculated (multiple (three points) surveying).

  In the example of FIG. 19, the management terminal 20 receives the radio field strength information transmitted by the wireless location information transmitter A10 at 1 mW, the radio location information transmitter B10 receives the radio field strength information transmitted by 10 mW, and the radio location information It shows that the transmitter C10 has received the radio wave intensity information transmitted at 100 mW. In addition, each field intensity information illustrated here is extracted as a value having the smallest value by the third among a plurality of field intensity information received by the management terminal 20.

  In such a case, the management terminal 20 determines (ascertains) that the distance from the radio position information transmitter A10 is a radio wave arrival distance of 1 mW. Then, the management terminal 20 determines (understands) that the distance from the wireless position information transmitter B10 is a radio wave arrival distance of 10 mW. Furthermore, the management terminal 20 determines (understands) that the distance from the radio position information transmitter C10 is a radio wave arrival distance of 100 mW.

  Then, the management terminal 20 calculates the position of the own device by a three-point survey method based on the grasped distance from each wireless position information transmitter 10 and the received position information together with the extracted radio wave intensity information. To grasp.

  Therefore, according to this embodiment, in order to grasp the position of the own apparatus based on the distance from the plurality of radio position information transmitters 10 and the position information, the management terminal 20 or the portable terminal 30 grasps the own apparatus. It can be expected that the accuracy of the position is further improved.

Embodiment 15 FIG.
FIG. 20 is an explanatory diagram for explaining a fifteenth embodiment of output power control of the wireless position information transmitter 10.

  In the thirteenth embodiment, the wireless location information transmitter 10 transmits the location information and the radio wave intensity information at a constant time interval and at different output power levels. In the fifteenth embodiment, the wireless location information transmitter 10 The transmitter 10 transmits content information corresponding to the radio wave reachable range in addition to the position information and the radio wave intensity information.

  Specifically, for example, when the radio location information transmitter 10 transmits radio waves at a high output power level, it is considered that the radio wave reachable range is wide, so the management terminal 20 or the mobile terminal 30 in a wide range receives the content information. I think that. Therefore, when the radio location information transmitter 10 transmits radio waves at a high output power level, the content information useful for the management terminal 20 or the portable terminal 30 existing in a wide range in addition to the location information and the radio wave intensity information. Send.

  On the other hand, when the radio location information transmitter 10 transmits radio waves at a low output power level, it is considered that the radio wave arrival range is narrow. Therefore, the management terminal 20 or the mobile terminal 30 near the radio location information transmitter 10 transmits content information. It is considered to receive. Therefore, when the radio location information transmitter 10 transmits radio waves at a low output power level, in addition to the location information and the radio field intensity information, the radio location information transmitter 10 transmits to the management terminal 20 or the mobile terminal 30 in the vicinity of the radio location information transmitter 10. Send useful content information.

  In the example of FIG. 20, the wireless location information transmitter 10 transmits content information at 1 mW at time T1, the wireless location information transmitter 10 transmits content information at 10 mW at time T2, and the wireless location information transmitter at time T3. 10 indicates that content information is transmitted at 100 mW.

  The wireless location information transmitter 10 transmits content information in the vicinity of the own device at time T1. In addition, the wireless location information transmitter 10 transmits content information about the area around the wireless location information transmitter 10 at time T2. The wireless location information transmitter 10 transmits wide area content information at time T3.

  Thus, the wireless location information transmitter 10 can provide the management terminal 20 or the mobile terminal 30 with content information corresponding to the radio wave reachable range.

Embodiment 16 FIG.
FIG. 21 is an explanatory diagram for explaining a sixteenth embodiment of output power control of the wireless position information transmitter 10.

  There is an error between the position determined based on the intensity of radio waves received from one radio position information transmitter 10 and information and the actual position. Therefore, in this embodiment, the management terminal 20 or the portable terminal 30 compares the output power level indicated by the radio wave intensity information received from the radio position information transmitter 10 with the radio wave intensity of the received radio wave, The distance from the information transmitter 10 is grasped.

  Specifically, the management terminal 20 or the mobile terminal 30 measures in advance distances (distances between the radio wave transmission position and the radio wave reception position) according to various output power levels and received radio wave strengths, for example. The relationship between the output power level and the received radio wave intensity and the distance is previously set as a table in a storage unit (not shown). Then, the management terminal 20 or the portable terminal 30 extracts the output power level indicated by the received radio wave intensity information and the distance corresponding to the received radio wave intensity, and grasps the distance from the radio position information transmitter 10.

  The management terminal 20 or the portable terminal 30 grasps its own relative position based on the grasped distance from the wireless position information transmitter 10 and the position indicated by the position information received from the wireless position information transmitter 10.

  As described above, according to this embodiment, the distance from the radio position information transmitter 10 ascertained by the radio wave intensity information and the received radio wave intensity, and the position indicated by the position information received from the radio position information transmitter 10 Since the self-relative position is grasped based on the above, the position accuracy of the wireless position information transmitter 10 within the radio wave reachable range can be improved.

Embodiment 17. FIG.
FIG. 22 is an explanatory diagram for explaining a seventeenth embodiment of output power control of the wireless position information transmitter 10.

  In the sixteenth embodiment, the position accuracy is improved within the radio wave arrival range of one radio position information transmitter 10. However, in this embodiment, within the radio wave arrival ranges of a plurality of radio position information transmitters 10. Improve position accuracy.

  Specifically, for example, the distance from the plurality of radio position information transmitters 10 is grasped using the method of the sixteenth embodiment. And based on the positional information received from each radio | wireless positional information transmitter 10, and the grasped distance, a self position is calculated (multiple (three points) surveying), and a self relative position is grasped.

  As described above, according to this embodiment, the distance from the plurality of radio position information transmitters 10 grasped by the radio field intensity information and the received radio field intensity, and the position received from the plurality of radio position information transmitters 10 Since the relative position of itself is grasped based on the position indicated by the information, the position accuracy of the wireless position information transmitter 10 within the radio wave arrival range can be further improved.

  As described above, in each of the above-described embodiments, the accuracy of the position grasped by the management terminal 20 or the portable terminal 30 is further increased, or radio wave interference between adjacent wireless position information transmitters 10 is prevented. Therefore, the output power level of each wireless position information transmitter can be easily and flexibly controlled according to changes in the situation.

  Further, the wireless location information transmitter 10 provides the management terminal 20 or the mobile terminal 30 with content information corresponding to the radio wave reachable range. That is, the management terminal 20 or the portable terminal 30 can receive information according to the distance from the wireless position information transmitter 10.

  The present invention transmits position information to a mobile terminal from a device that is provided at predetermined locations within a service range and transmits position information by radio waves, and the mobile terminal grasps the position based on the received position information. The apparatus can be used for an application in which the position information is used for the convenience of the user.

It is a system configuration figure showing an example of device arrangement in a position information recognition system. It is a block diagram which shows the structural example of a wireless location information transmitter. It is a block diagram which shows the structural example of a management terminal. It is a block diagram which shows the structural example of a portable terminal. It is explanatory drawing for demonstrating 1st Embodiment. It is explanatory drawing for demonstrating 2nd Embodiment. It is explanatory drawing for demonstrating an optimal output electric power level. It is explanatory drawing for demonstrating 3rd Embodiment. It is explanatory drawing for demonstrating 4th Embodiment. It is explanatory drawing for demonstrating 5th Embodiment. It is explanatory drawing for demonstrating 6th Embodiment. It is explanatory drawing for demonstrating 7th Embodiment. It is explanatory drawing for demonstrating 8th Embodiment. It is explanatory drawing for demonstrating 9th Embodiment. It is explanatory drawing for demonstrating 10th Embodiment. It is explanatory drawing for demonstrating 11th Embodiment. It is explanatory drawing for demonstrating 12th Embodiment. It is explanatory drawing for demonstrating 13th Embodiment. It is explanatory drawing for demonstrating 14th Embodiment. It is explanatory drawing for demonstrating 15th Embodiment. It is explanatory drawing for demonstrating 16th Embodiment. It is explanatory drawing for demonstrating 17th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wireless location information transmitter 20 Management terminal 30 Portable terminal 40 Server 100 Radio wave coverage 200 Communication network

Claims (32)

A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device are provided in a predetermined area, and the position information received by the mobile terminal device from any of the plurality of wireless position information transmitters In the position information recognition system that grasps its own position based on
A management terminal capable of moving within the predetermined area and transmitting radio wave output control information for setting an output power level of radio waves transmitted from each radio position information transmitter to the radio position information transmitter; Position information recognition system characterized by A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device are provided, and the mobile terminal device is based on the position information received from any of the plurality of wireless position information transmitters. In the position information recognition system that grasps the position,
Each wireless location information transmitter includes control means for setting an output power level of a radio wave transmitted by itself by performing wireless communication with another wireless location information transmitter or the mobile terminal device. Position information recognition system. A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device are provided, and the mobile terminal device is based on the position information received from any of the plurality of wireless position information transmitters. In the position information recognition system that grasps the position,
Each wireless location information transmitter includes a transmission means for transmitting information indicating the output power level in addition to the location information,
When the portable terminal device receives position information and information indicating an output power level from a plurality of wireless position information transmitters, the position information received from the wireless position information transmitter that has transmitted information indicating the lowest output power level A position information recognition system characterized by including a control unit that grasps its own position based on the above. A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device are provided, and the mobile terminal device is based on information indicating the position information received from any of the plurality of wireless position information transmitters. In the position information recognition system that grasps its own position,
Each wireless location information transmitter includes control means for setting a timing at which the own device or the other wireless location information transmitter transmits information by communicating with another wireless location information transmitter. Feature location information recognition system. A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device and information indicating the output power level are provided, and the mobile terminal device receives from any of the plurality of wireless position information transmitters In the position information recognition system that grasps its own position based on the position information and information indicating the output power level,
Each wireless position information transmitter includes a transmission means for transmitting the position information and information indicating the output power level by changing the output power level at regular time intervals,
The portable terminal device includes a control unit that grasps its own position based on position information received together with information indicating the lowest output power level within a predetermined time and information indicating the output power level. Position information recognition system. A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device and information indicating an output power level are provided, and the position information received by the mobile terminal device from the plurality of wireless position information transmitters, and In the position information recognition system that grasps its own position based on the information indicating the output power level,
Each wireless position information transmitter includes a transmission means for transmitting the position information and information indicating the output power level by changing the output power level at regular time intervals,
The mobile terminal device selects information indicating a predetermined number of output power levels in descending order of output power level from among the information indicating output power levels transmitted by the transmitting means of a plurality of wireless position information transmitters within a certain period of time. A position information recognition system, comprising: a control unit that grasps its own position based on the information indicating the selected output power level and the position information received together with the information indicating the selected output power level. . A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device and information indicating the output power level are provided, and the mobile terminal device receives from any of the plurality of wireless position information transmitters In the position information recognition system that grasps its own position based on the position information and information indicating the output power level,
The wireless position information transmitter includes a transmitting means for transmitting information corresponding to the output power level by changing an output power level at a constant time interval. A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device and information indicating the output power level are provided, and the mobile terminal device receives from any of the plurality of wireless position information transmitters In the position information recognition system that grasps its own position based on the position information and information indicating the output power level,
The portable terminal device includes a control unit that grasps a distance from the wireless position information transmitter based on the intensity of the radio wave received from the wireless position information transmitter and information indicating the output power level. Location information recognition system. A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device and information indicating the output power level are provided, and the mobile terminal device receives from any of the plurality of wireless position information transmitters In the position information recognition system that grasps its own position based on the position information and information indicating the output power level,
The portable terminal device grasps the distance from the wireless position information transmitter based on the intensity of the radio wave received from the wireless position information transmitter and information indicating the output power level, and receives the distance from the wireless position information transmitter. A position information recognition system comprising: a control unit that grasps its own position based on the obtained position information and the grasped distance. A plurality of wireless position information transmitters each transmitting position information indicating the installation position of the own device and information indicating the output power level are provided, and the mobile terminal device receives from any of the plurality of wireless position information transmitters In the position information recognition system that grasps its own position based on the position information and information indicating the output power level,
The mobile terminal device grasps distances from the plurality of radio position information transmitters based on the intensity of radio waves received from the plurality of radio position information transmitters and information indicating an output power level, and A position information recognition system comprising: a control unit that grasps its own position based on the position information received from a wireless position information transmitter and the grasped distance. A plurality of wireless position information transmitters provided in a predetermined area each transmit position information indicating the installation position of the own device, and the mobile terminal device receives the position information received from any of the plurality of wireless position information transmitters. In the location information recognition method that grasps its own location based on
The wireless location information transmitter is received from a management terminal that can move within the predetermined area and transmits radio wave output control information for setting an output power level of a radio wave transmitted by each wireless location information transmitter. A position information recognition method characterized by setting an output power level according to radio wave output control information. Multiple wireless location information transmitters each transmit location information indicating their installation location, and the mobile terminal device grasps its own location based on the location information received from any of the multiple wireless location information transmitters In the position information recognition method to
A position information recognition method characterized in that a wireless position information transmitter sets an output power level of a radio wave transmitted by itself by performing wireless communication with another wireless position information transmitter or the portable terminal device. . The wireless location information transmitter communicates information indicating its own output power level or radio wave reach with other wireless location information transmitters, and the information received from other wireless location information transmitters The position information recognition method according to claim 12, wherein an optimum output power level of each wireless position information transmitter is determined based on the information. The wireless location information transmitter predicts the moving direction of the mobile terminal device by performing wireless communication with the mobile terminal device,
The position information recognition method according to claim 12, wherein another wireless position information transmitter in the predicted moving direction increases the output power level. The position information recognition method according to claim 12, wherein the wireless position information transmitter grasps a distance between the portable terminal device by performing wireless communication with the portable terminal device, and lowers the output power level as the distance increases. . Multiple wireless location information transmitters each transmit location information indicating their installation location, and the mobile terminal device grasps its own location based on the location information received from any of the multiple wireless location information transmitters In the position information recognition method to
Each wireless location information transmitter transmits information indicating the output power level in addition to the location information,
When the mobile terminal device receives position information and information indicating the output power level from a plurality of wireless position information transmitters, the position information received from the wireless position information transmitter that has transmitted the information indicating the lowest output power level A location information recognition method characterized by grasping one's own position based on this. Multiple wireless location information transmitters each transmit location information indicating their installation location, and the mobile terminal device grasps its own location based on the location information received from any of the multiple wireless location information transmitters In the position information recognition method to
The wireless location information transmitter communicates with other wireless location information transmitters to set timing for transmitting information by itself or the other wireless location information transmitter. Method. The plurality of wireless position information transmitters each transmit position information indicating the installation position of the own device and information indicating the output power level, and the position information received from any of the plurality of wireless position information transmitters by the mobile terminal device and In the position information recognition method for grasping its own position based on the information indicating the output power level,
The wireless position information transmitter transmits the information indicating the position information and the output power level by changing the output power level at regular time intervals,
The portable terminal device grasps its own position based on position information received together with information indicating the lowest output power level and information indicating the output power level within a predetermined time. Recognition method. Position information and output power level received by the mobile terminal device from the plurality of wireless position information transmitters, each of which transmits position information indicating the installation position of the own device and information indicating the output power level. In the position information recognition method that grasps its own position based on the information indicating
The wireless position information transmitter transmits the information indicating the position information and the output power level by changing the output power level at regular time intervals,
The mobile terminal device includes information indicating a predetermined number of output power levels in descending order of output power level among information indicating output power levels transmitted by transmitting means of a plurality of wireless position information transmitters within a certain time. A position information recognition method comprising: selecting and grasping the own position based on the information indicating the selected output power level and the position information received together with the information indicating the selected output power level. A plurality of wireless position information transmitters each transmit position information indicating an installation position of the own device and information indicating an output power level, and the position information received from any of the plurality of wireless position information transmitters by the mobile terminal device; In the position information recognition method for grasping its own position based on the information indicating the output power level,
The position information recognition method, wherein the wireless position information transmitter changes an output power level at a constant time interval and transmits information according to the output power level. A plurality of wireless position information transmitters each transmit position information indicating an installation position of the own device and information indicating an output power level, and the position information received from any of the plurality of wireless position information transmitters by the mobile terminal device; In the position information recognition method for grasping its own position based on the information indicating the output power level,
The portable terminal device grasps the distance from the wireless position information transmitter based on the intensity of the radio wave received from the wireless position information transmitter and information indicating the output power level. . A plurality of wireless position information transmitters each transmit position information indicating an installation position of the own device and information indicating an output power level, and the position information received from any of the plurality of wireless position information transmitters by the mobile terminal device; In the position information recognition method for grasping its own position based on the information indicating the output power level,
The portable terminal device grasps the distance from the wireless position information transmitter based on the intensity of the radio wave received from the wireless position information transmitter and information indicating the output power level, and receives the distance from the wireless position information transmitter. A position information recognition method characterized by grasping its own position based on the obtained position information and the grasped distance. A plurality of wireless position information transmitters each transmit position information indicating an installation position of the own device and information indicating an output power level, and the position information received from any of the plurality of wireless position information transmitters by the mobile terminal device; In the position information recognition method for grasping its own position based on the information indicating the output power level,
The mobile terminal device grasps distances from the plurality of radio position information transmitters based on the intensity of radio waves received from the plurality of radio position information transmitters and information indicating an output power level, and A position information recognition method characterized by grasping its own position based on position information received from a wireless position information transmitter and the grasped distance. In order to make the mobile terminal device grasp its own position based on the position information received from any of a plurality of wireless position information transmitters,
A wireless position information transmitter comprising a control means for setting an output power level of a radio wave transmitted by the own device by performing wireless communication with another wireless position information transmitter or the portable terminal device. A portable terminal device that grasps its own position based on position information received from any of a plurality of wireless position information transmitters each transmitting position information indicating its own installation position and information indicating its output power level There,
When receiving position information and information indicating the output power level from multiple wireless position information transmitters, it is based on the position information received from the wireless position information transmitter that has transmitted the information indicating the lowest output power level. A portable terminal device characterized by comprising a control unit for grasping. A portable terminal device that grasps its own position based on position information received from any of a plurality of wireless position information transmitters each transmitting position information indicating its own installation position and information indicating its output power level There,
A portable terminal device comprising: a control unit that grasps a distance from the wireless position information transmitter based on intensity of radio waves received from the wireless position information transmitter and information indicating an output power level. A portable terminal device that grasps its own position based on position information received from any of a plurality of wireless position information transmitters each transmitting position information indicating its own installation position and information indicating its output power level There,
Based on the intensity of the radio wave received from the wireless location information transmitter and the information indicating the output power level, the distance from the wireless location information transmitter is determined, and the location information received from the wireless location information transmitter is determined. A portable terminal device comprising: a control unit that grasps its own position based on the distance. A portable terminal device that grasps its own position based on position information received from any of a plurality of wireless position information transmitters each transmitting position information indicating its own installation position and information indicating its output power level There,
Based on the intensity of radio waves received from a plurality of radio position information transmitters and information indicating the output power level, the distances from the plurality of radio position information transmitters are respectively grasped, and from the plurality of radio position information transmitters A portable terminal device comprising: a control unit that grasps its own position based on the received position information and the grasped distance. A portable terminal device that grasps its own position based on position information received from any of a plurality of wireless position information transmitters each transmitting position information indicating its own installation position and information indicating its output power level A program to be installed,
In the computer mounted on the portable terminal device,
When receiving position information and information indicating the output power level from multiple wireless position information transmitters, it is based on the position information received from the wireless position information transmitter that has transmitted the information indicating the lowest output power level. A program to execute the process of grasping. A portable terminal device that grasps its own position based on position information received from any of a plurality of wireless position information transmitters each transmitting position information indicating its own installation position and information indicating its output power level A program to be installed,
In the computer mounted on the portable terminal device,
A program for executing processing for grasping a distance from the wireless position information transmitter based on the intensity of radio waves received from the wireless position information transmitter and information indicating an output power level. A portable terminal device that grasps its own position based on position information received from any of a plurality of wireless position information transmitters each transmitting position information indicating its own installation position and information indicating its output power level A program to be installed,
In the computer mounted on the portable terminal device,
Based on the intensity of the radio wave received from the wireless location information transmitter and the information indicating the output power level, the distance from the wireless location information transmitter is determined, and the location information received from the wireless location information transmitter is determined. The program for performing the process which grasps | ascertains its own position based on the said distance. A portable terminal device that grasps its own position based on position information received from any of a plurality of wireless position information transmitters each transmitting position information indicating its own installation position and information indicating its output power level A program to be installed,
In the computer mounted on the portable terminal device,
Based on the intensity of radio waves received from a plurality of radio position information transmitters and information indicating the output power level, the distances from the plurality of radio position information transmitters are respectively grasped, and from the plurality of radio position information transmitters A program for executing a process of grasping its own position based on the received position information and the grasped distance.

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