JP2006177904A - System for transmitting positioning signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system allowing position specification of a vehicle travelling on a determined route. <P>SOLUTION: A system for transmitting a positioning signal has GPS signal generating devices 220, 222 and 224 connected to GPS receiving system 200, 202 and 204 for receiving GPS signals via GPS antennas 230, 232 and 234, and repeaters 210, 212 and 214 for transmitting signals via antennas 220, 222 and 224, respectively. Each GPS signal generating device includes a communication I/F for receiving incoming of the GPS signal, a CPU for controlling an operation inside the GPS signal generating device, a memory, a clock, a GPS signal generating section for generating a false GPS signal based on the GPS signal, and an output I/F for outputting the false GPS signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for transmitting a signal for generating position information. More specifically, the present invention relates to a positioning signal transmission system for transmitting a signal that enables specification of the position of a vehicle that operates on a predetermined route.

  The need for location information is increasing. As a technique for acquiring position information, for example, a GPS (Global Positioning System) known as a positioning system is based on GPS signals transmitted by a plurality of GPS satellites capable of transmitting signals including time information. This is realized by measuring the position of the communication terminal that receives the signal. The communication terminal includes a mobile phone capable of receiving GPS signals, a receiver included in a car navigation system, and the like. Here, the GPS includes not only GPS operated by the United States of America but also Galileo, which is currently being studied in the European Union, GLONASS (Global Navigation Satellite System) operated by the Russian Republic, and other satellite navigation systems. .

  The location information is obtained by calculating at a terminal capable of receiving the GPS signal, or by transmitting the signal to another arithmetic device and calculating by the device. Therefore, in the environment where the communication terminal can receive GPS signals, the location of the communication terminal can be specified.

  In addition, although the prior art about this invention was demonstrated based on the general technical information which the applicant acquired, the information which should be disclosed as prior art document information before filing in the range which an applicant memorize | stores The applicant does not have

  However, even in the area where the GPS signal is transmitted, if all the GPS signals necessary for acquiring the position information cannot be received, the position information may not be acquired. For example, there may be a case where the position of a vehicle operating on a predetermined route cannot be specified. In addition, the propagation of GPS signals may be blocked by buildings or other high-rise objects, or position information may not be acquired or the accuracy of the acquired position information may be reduced due to a phenomenon called so-called multipath. was there.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a positioning signal transmission system for specifying the position of a vehicle traveling on a predetermined route. .

  Another object of the present invention is to provide a positioning signal transmission system capable of seamlessly acquiring position information.

  Still another object of the present invention is to provide a positioning signal transmission system capable of preventing a decrease in accuracy of acquired position information.

  In order to solve the above-described problem, according to one aspect of the present invention, a positioning signal transmission system includes a vehicle that operates on a predetermined route, and a plurality of positioning signal generation devices arranged along the route. Prepare. Each positioning signal generator includes receiving means for receiving first positioning signals including data for positioning from at least three satellites. Each first positioning signal is encoded by a first identification code for identifying the satellite that has transmitted the first positioning signal. Each positioning signal generation device includes generation means for generating a second positioning signal different from the first positioning signal based on the first positioning signal. The second positioning signal is encoded by a second identification code different from the first identification code. The positioning signal generation device includes transmission means for transmitting the second positioning signal. The vehicle includes receiving means for receiving a second positioning signal, calculating means for calculating position information based on the second positioning signal, and information transmitting means for transmitting position information.

  When the other situation of this invention is followed, a positioning signal transmission system is a system for transmitting the signal for positioning toward the vehicle which drive | works on the defined route. The vehicle receives the signal and transmits it inside the vehicle. The positioning signal transmission system includes a plurality of positioning signal generation devices arranged along a route. Each positioning signal generator includes receiving means for receiving first positioning signals including data for positioning from at least three satellites. Each first positioning signal is encoded by a first identification code for identifying the satellite that has transmitted the first positioning signal. Each positioning signal generation device includes generation means for generating a second positioning signal different from the first positioning signal based on the first positioning signal. The second positioning signal is encoded by a second identification code different from the first identification code. Each positioning signal generation device includes transmission means for transmitting the second positioning signal.

  Preferably, the receiving means receives the encoded first positioning signal. The generating means generates a second positioning signal by decoding a decoding means for decoding the encoded first positioning signal and a signal decoded based on the second identification code. Encoding means.

  Preferably, the positioning signal generation device further includes storage means for storing the second identification code. The encoding means generates a second positioning signal based on the second identification code stored in the storage means.

  Preferably, the receiving means receives four positioning signals. The generating means generates four second positioning signals corresponding to each of the first positioning signals based on each of the four first positioning signals. The transmission means transmits four second positioning signals.

  Preferably, the vehicle is an automobile traveling on a predetermined route. Each positioning signal generator is installed on a pillar arranged along the route.

  Preferably, the vehicle is a vehicle that travels on a route in a predetermined site.

  Preferably, the vehicle is a railway vehicle. Each positioning signal generator is installed on a pillar for supporting a railway overhead line.

  Preferably, the pillar for supporting the railway overhead line is arranged outdoors.

  Preferably, the distance between each positioning signal generator is less than the range in which the signal transmitted by the transmission means reaches.

  According to the positioning signal transmission system according to the present invention, a vehicle traveling on a predetermined route can acquire position information by receiving a positioning signal. Therefore, the position of the vehicle can be specified based on the position information.

  In addition, according to the positioning signal transmission system according to the present invention, the vehicle can acquire the position information on the determined route, so that the position information of the traveling vehicle can be acquired seamlessly.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  A positioning signal transmission system according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing a usage mode of GPS signal generation devices 100, 102, and 104, which are one mode of a positioning signal generation device for realizing a positioning signal transmission system. For simplicity of explanation, the GPS signal generation device 100 will be described, but the description also applies to the GPS signal generation devices 102 and 104.

  The GPS signal generators 100, 102, and 104 are attached to iron poles of railway overhead lines. Specifically, the GPS signal generator 100 is attached to the beam of the overhead iron pole 110. The vehicle 140 is, for example, a railway vehicle. The vehicle 140 includes an antenna 142 that can receive a GPS signal. Therefore, in the present embodiment, the determined route corresponds to a railway line.

  In addition, the vehicle operating on the determined route is not limited to a rail vehicle. For example, it may be a vehicle used for purposes other than public transportation traveling in a factory or other site. Alternatively, a route bus may be used. In the case of a route bus, the following GPS signal generator 100 is laid, for example, in a post or other part of a traffic light at an intersection, that is, a part that can constantly receive a GPS signal.

  The GPS signal generator 100 receives signals from a GPS receiver (described later) having a function of receiving GPS signals from GPS satellites 150, 152, 154, and 156 and a function of outputting them. The signal received by the GPS signal generation device 100 is not necessarily a signal transmitted from four satellites as shown in FIG. The GPS signal generation device 100 may receive signals from, for example, three satellites. Further, the satellites received by the GPS signal generation device 100 differ according to the so-called calendar. Therefore, the GPS signal generation device 100 receives a receivable satellite signal determined according to the calendar. Data representing the calendar is stored in advance in the GPS signal generator 100.

  Furthermore, the GPS signal generation device 100 decodes the signal transmitted from each GPS satellite using an identification code for decoding. The GPS signal generation device 100 encodes the decoded signal using an identification code different from the identification code for each GPS satellite, thereby generating a signal (pseudo GPS signal) having the same configuration as the GPS signal. ) (PRN35, PRN36, PRN37, PRN38). When the GPS signal generator 100 outputs a pseudo GPS signal, the signal is transmitted via an antenna.

  The transmittable range by the GPS signal generator 100 is a range 120 in FIG. The transmission possible range by the GPS signal generation device 102 having the same configuration and function is a range 122. Here, the transmittable ranges of the GPS signal generators 100 and 102 are determined based on the distance between the iron poles 110 and 112 of the overhead wire, for example. That is, the transmission range by each device is determined to such an extent that there is no range in which signals transmitted by either of the GPS signal generation devices 100 and 102 cannot be received between these iron poles. Therefore, the vehicle 140 running on the track laid between the steel pillars can reliably receive the signal transmitted by any GPS signal generator.

  For example, when there is a tunnel 160, the GPS signal generator 104 may be installed on the iron pole 114 in the tunnel 160 similarly. In this case, when it is difficult to receive a signal from a GPS satellite, a receiving device may be disposed outside the tunnel 160 and the signal received by the receiving device may be transmitted to the inside of the tunnel 160.

  Referring again to FIG. 1, PRN codes 35, 36, 37, and 38 represent pseudo GPS signals that are encoded with predetermined identification codes, respectively. These signals have codes that are completely different from the identification codes included in GPS signals transmitted by GPS satellites 150-156. Each of the GPS signal generators 100, 102, and 104 transmits a pseudo GPS signal as shown in FIG.

  The vehicle 140 includes a GPS receiving device (not shown) configured to receive a pseudo GPS signal. This GPS receiver stores a predetermined code pattern for demodulating a pseudo GPS signal. The GPS receiver demodulates (reproduces) the signal received by the antenna 142 based on the code pattern. The GPS receiver calculates position information based on the demodulated signal. This calculation is performed using, for example, position data held in advance by the GPS receiver. As described above, the position information in the vehicle 140 is realized by using the same code as the code included in the GPS signal generation devices 100, 102, and 104 according to the present embodiment. Since the hardware configuration of the GPS receiver is well known, description thereof will not be repeated here.

  Further, when the vehicle 140 has a signal repeater (so-called repeater) and a transmitter, a positioning signal can be provided to the passenger. For example, when a terminal (for example, a mobile phone held by a passenger) present in the vehicle 140 has a function described later, a signal having the same identification code can be continuously received while the vehicle 140 is traveling.

  In this case, even when the vehicle 140 is traveling, the terminal calculates position information based on the signal. In this case, for example, when a passenger operates a mobile phone to make a dial call, the transmission signal can be transmitted with position information. A partner receiving this signal can specify the location of the passenger based on the position information included in the received signal. Further, when a signal having position information is continuously transmitted from the mobile phone of the traveling vehicle 140, a receiver of the signal can track the position of the mobile phone.

  The operation of the terminal can be realized as a hardware operation by previously configuring a circuit for executing the above processing. Alternatively, it can be realized by storing a program product for executing each process in a memory and causing the CPU of the terminal to execute the program product.

  With reference to FIG. 2, the connection mode of GPS signal generators 100, 102, and 104 according to the present embodiment will be described. FIG. 2 is a diagram conceptually showing the connection relationship between each GPS signal generator and GPS receiver.

  The GPS signal generator 100 is connected to the GPS receiver 200. A GPS antenna 230 is connected to the GPS receiver 200. A repeater 210 is connected to the output side of the GPS signal generator 100. An antenna 220 is connected to the repeater 210.

  The GPS receiver 200 receives a signal from a GPS satellite based on a code pattern prepared in advance. The code pattern refers to a code having a predetermined bit arrangement as data for receiving a GPS signal. This code pattern may be input in advance, for example, or may be acquired from a signal first received from a GPS satellite. The signal is sent to the GPS signal generator 100. The GPS signal generation device 100 generates a pseudo GPS signal by encoding the signal using a code pattern different from the above-described code pattern. The GPS signal generation device 100 sends the signal to the repeater 210.

  The antenna 220 has a radio wave transmittable range 120 that is predetermined according to the strength of the supplied signal. Therefore, when the GPS signal generation device 100 transmits a pseudo-generated GPS signal via the repeater 210, the signal is propagated between the transmittable ranges 120.

  Note that the GPS receiving device 200, the GPS signal generating device 100, the repeater 200, and the antenna 220 do not have to be configured separately, and may be configured integrally.

  Similarly, the GPS signal generator 102 is connected to the GPS receiver 202 to which the GPS antenna 232 is connected, and receives GPS signals. The GPS signal generator 102 has a repeater 212 connected to the output side. An antenna 222 is connected to the repeater 212. The connection relationship of the GPS signal generator 104 is the same.

  With reference to FIG. 3, GPS signal generation device 100 according to the present embodiment will be described. FIG. 3 is a diagram conceptually showing the hardware configuration of the GPS signal generator 100.

  The GPS signal generation apparatus 100 includes an input I / F (Interface) 820, a CPU (Central Processing Unit) 900, a memory 930, a GPS signal generation unit 300, a clock 842, and an output I / F 130.

  The input I / F 820 receives an input of an external signal. For example, when a cable (not shown) is connected to the input I / F 820, the input I / F 820 receives a signal input via the cable. Alternatively, when the input I / F 820 is realized by a receiving antenna and a signal receiving device, the input I / F 820 receives a signal input in the form of a radio wave.

  CPU 900 includes a memory (not shown) for storing data prepared in advance and a processor (not shown) for executing a predetermined process. The CPU 900 controls operations of other elements constituting the GPS signal generation device 100. The operation includes, for example, storing data in the memory 930 or reading data from the memory 930, receiving a signal input from the outside, executing a process according to the signal, an operation of the GPS signal generation unit 300, and the like.

  The clock 842 measures the internal time of the GPS signal generator 100 and outputs time data to the CPU 900. When the CPU 900 has a function of correcting the time of the clock 842 based on time data included in a GPS signal input from the outside, the clock 842 is corrected according to the time data.

  The GPS signal generation unit 300 generates a pseudo GPS signal based on the GPS signal input to the GPS signal generation device 100 and data stored in advance. Here, the pseudo GPS signal has the same configuration as a signal transmitted from a GPS satellite, and an identification number for identifying a transmission source (for example, a GPS satellite) of the signal included in the GPS signal. Means having different numbers. Therefore, when a pseudo GPS signal is received by a device (for example, a mobile phone) having a GPS reception function, the device can execute processing for calculating position information.

  The output I / F 130 receives an input of a signal transmitted from the GPS signal generation unit 300. The output I / F 130 is connected to a repeater (not shown) via a communication cable (not shown). The repeater includes a transmitter. Therefore, when a pseudo GPS signal is transmitted from the output I / F 130, the signal is transmitted from a transmitter of the repeater.

  The memory 930 stores a program, data, and the like for controlling the operation of the GPS signal generation device 100. The program includes, for example, a communication program for periodically reporting the operating state of the GPS signal generation device 100, a program for executing a predetermined process in accordance with a command input from the outside, and the like. The processing includes, for example, inspection processing for maintenance, processing for updating data to be described later, and the like. The data includes, for example, an operation history of the GPS signal generator 100. The operation history includes, for example, information for identifying a GPS satellite that is a transmission source of a received signal, reception date and time, transmission date and time, and the like. The identification information is, for example, a C / A (Coarse and Access) code, but may be another code.

  With reference to FIG. 4, a configuration of GPS signal generation section 300 according to the present embodiment will be described. FIG. 4 is a block diagram illustrating a functional configuration of the GPS signal generation unit 300.

  The GPS signal generation unit 300 includes an input unit 310, a memory 400, a pseudo signal generation unit 330, and an output unit 340. The input unit 310 receives an input of a GPS signal input to the GPS signal generator 100. As for this signal, the memory 400 stores data necessary for controlling the operation of the GPS signal generator 300 or data necessary for processing of a pseudo signal generator 330 described later. The memory 400 may include, for example, any one or both of a nonvolatile memory and a volatile memory. Data stored in the memory 400 will be described later.

  The pseudo signal generation unit 330 generates a pseudo GPS signal based on a signal input via the input unit 310 and data read from the memory 400. That is, the pseudo signal generation unit 330 generates a pseudo GPS signal based on the actual GPS signal and the identification data. The pseudo GPS signal has identification data different from data for identifying a GPS satellite included in the actual GPS signal. In this way, even if a pseudo GPS signal is received by the receiving device, the signal is not recognized as a signal from an actual GPS satellite. Therefore, misrecognition by the receiving device can be prevented.

  The identification data is data set in advance as data different from the identification data of the GPS satellite. Therefore, the same identification data can be assigned to each of the plurality of GPS signal generators 100 by setting the initial data in advance when the plurality of GPS signal generators 100 are configured. In this way, the receiving apparatus can always recognize the pseudo GPS signal as a signal transmitted from the same signal source. Therefore, when position information calculated based on a pseudo GPS signal is transmitted by the receiving device, tracking of the device can be facilitated.

  The output unit 340 outputs the signal generated by the pseudo signal generation unit 330 to the outside of the GPS signal generation unit 300. The output signal is sent to the output I / F 130 connected by wiring.

  The GPS signal generation unit 300 is formed on one substrate as an integrated circuit, for example. Alternatively, the GPS signal generation unit 300 includes a memory in which programs and data for realizing each function are stored, and a CPU and other arithmetic devices for executing processes described later based on the programs and data. And may be realized.

  With reference to FIG. 5, the data structure of the GPS signal generation unit 300 will be described. FIG. 5 is a diagram conceptually showing one mode of data storage in the memory 400 included in the GPS signal generation unit 300.

  The memory 400 includes data areas 410 to 470 for storing data. Information on the position where the GPS signal generator 100 is installed is stored in the data area 410. Time information when the operation of the GPS signal generator 100 is started is stored in the data area 420.

  Data for the pseudo signal generation unit 330 to generate a pseudo GPS signal, that is, a pseudo navigation message is stored in the data area 430. The pseudo navigation message includes, for example, almanac data. Here, the pseudo GPS signal refers to a signal having a configuration similar to that of a GPS signal transmitted by a GPS satellite. The pseudo navigation message is data having the same configuration as the navigation message included in the actual GPS signal.

  Each identification code for identifying the transmission source included in the pseudo GPS signal is stored in each of the data areas 440 to 470. For example, “PRN35” is stored in the data area 440 as the identification code of the first satellite. Similarly, “PRN36” is stored in the data area 450 as the identification code of the second satellite. “PRN37” is stored in the data area 460 as the identification code of the third satellite. “PRN38” is stored in the data area 470 as the identification code of the fourth satellite.

  Note that the above data is for illustrative purposes only, and the identification code is not limited to these. That is, the data stored in the data areas 440 to 470 may be data different from the identification code included in the actual GPS signal (that is, the code for identifying each satellite that actually transmits the GPS signal).

  Further, in the present embodiment, a mode in which four pseudo GPS signals are generated is described, but the number of generated signals is not limited to four. For example, there may be three. In this case, there are three pieces of identification data necessary for generating three pseudo GPS signals.

  With reference to FIG. 6, a signal transmitted by GPS signal generation device 100 according to the present embodiment will be described. 6A to 6D are diagrams conceptually showing the structure of a pseudo GPS signal generated by the GPS signal generation unit 300. FIG.

  When the GPS signal generation unit 300 executes a predetermined signal generation process for generating a pseudo GPS signal, a signal having the same configuration as a signal transmitted by an actual GPS satellite is output. Here, the difference between the pseudo GPS signal and the actual signal is that, as described above, the data for identifying the transmission source is completely different from the data for identifying the actual satellite. It is. Each signal includes a C / A code and a navigation message. The navigation message includes, for example, an almanac.

  In addition, although the example shown by FIG. 6 represents the case where four signals are included, three pseudo signals may be produced | generated.

  With reference to FIG. 7, the control structure of the GPS signal generator 100 will be described. FIG. 7 is a flowchart showing a procedure of processing executed by pseudo signal generation unit 330 of GPS signal generation device 100. The procedure is realized, for example, by a circuit or other hardware for executing each process. Alternatively, each process may be realized as software execution. In this case, each process is realized by, for example, the CPU executing the software.

  In step S710, pseudo signal generation unit 330 accepts an input of an actually received GPS signal. This GPS signal is obtained by receiving GPS signals transmitted from, for example, four GPS satellites.

  In step S720, pseudo signal generation unit 330 generates a pseudo GPS signal based on the input GPS signal. When four GPS signals are input, four pseudo GPS signals are generated.

  In step S730, pseudo signal generation unit 330 outputs each pseudo GPS signal. Each signal is sent out of the signal generator 300 via the output unit 340. The pseudo GPS signal is transmitted to the repeater 210 connected to the cable by the output I / F 130. A pseudo GPS signal transmitted from the repeater 210 is transmitted from the antenna 220 (FIG. 2).

  Thereby, for example, when the train passes through the transmittable range 120 of the antenna 220, the train can receive the pseudo GPS signal and calculate the position information. Moreover, the control center for managing the operation of the train can easily specify the position of each vehicle by transmitting the position information using a transmission device (not shown).

  As described above, according to the positioning signal transmission system according to the embodiment of the present invention, an actual GPS signal is received, a pseudo GPS signal is generated based on the signal, and the signal is transmitted. The range in which the pseudo signal is transmitted is a range including a line of a vehicle (for example, a route bus or a railroad (including a railroad traveling in a factory)) that operates on a predetermined route. The GPS signal includes data different from data for identifying an actual GPS satellite.

  In this way, the traveling vehicle can receive a pseudo GPS signal when traveling in the range, and therefore, the location can be specified based on the signal.

  Further, when a train is traveling, for example, other than a tunnel, a high-rise building or other place where radio waves are easily reflected, the train can receive a positioning signal that is not affected by multipath or the like. Further, the intensity of the signal can be output stronger than the signal transmitted directly from the satellite. Therefore, in such a case, it is possible to prevent a decrease in accuracy of train position information.

  In the above-described embodiment, the GPS receiving device 200, the GPS signal generating device 100, and the repeater 210 are configured separately (see FIG. 2), but may be configured as one device. In such a case, the positioning signal generator 100 further includes a receiving circuit for receiving an actual GPS signal via an antenna and a transmitting circuit for transmitting a pseudo signal generated based on the signal. It will be.

  In addition, the GPS signal generation device 100 may not be installed on all the iron pillars. For example, when the range of the radio wave transmitted from the GPS signal generating device 100 is realized without omission on the railway line, the GPS signal generating device 100 may be installed every several iron poles.

  Moreover, in this Embodiment, although the iron pillar of the overhead wire for railways is shown as a place where a GPS signal generator is installed, an installation place is not restricted to this. For example, on a road, a GPS signal generator may be installed on a signal pole. In particular, in urban areas where high-rise buildings stand, position information can be calculated based on signals from GPS signal generators attached to each traffic light. Also in this case, since the location information can be transmitted together when the receiving terminal performs a transmission operation, the location of transmission can be reliably notified even in an emergency call, for example.

  In the present embodiment, the GPS signal generation device is disposed at a location where an actual GPS signal can be received, but may not be disposed at a location where an actual GPS signal can be directly received. For example, it may be arranged along a subway line. In this case, a pseudo GPS signal is generated based on a signal transmitted from a receiving device capable of receiving an actual GPS signal. Thereby, for example, the position on the subway track can be notified.

  Further, in a car equipped with a car navigation system, if the GPS reception function of a mobile phone cannot be used in a running car, the car navigation system may be equipped with the GPS signal generator 100 according to the present embodiment. Good. If it does in this way, even if it is driving | running | working, for example, the position of the sender | caller of a mobile telephone can be notified, without being restricted to the information from a car navigation system.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure showing the usage condition of the GPS signal generator which implement | achieves the positioning signal transmission system which concerns on embodiment of this invention. It is a figure which represents notionally the connection relation of the GPS signal generator which concerns on embodiment of this invention, and a GPS receiver. It is a figure which represents notionally the hardware constitutions of the GPS signal generator which concerns on embodiment of this invention. It is a block diagram showing the functional structure of the GPS signal generation part which concerns on embodiment of this invention. It is a figure which represents notionally 1 aspect of the storage of the data in the memory with which the GPS signal generation part which concerns on embodiment of this invention is provided. It is a figure which represents notionally the structure of the signal which the GPS signal generator which concerns on embodiment of this invention transmits. It is a flowchart showing the procedure of the process which the pseudo signal generation part of the GPS signal generator which concerns on embodiment of this invention performs.

Explanation of symbols

  100, 102, 104 GPS signal generator, 110, 112, 114 steel pole, 130 output I / F, 150, 152, 154, 156 GPS satellite, 140 vehicle, 142 antenna, 160 tunnel, 200 GPS receiver, 144, 210 , 212 repeater, 220, 222 antenna, 300 GPS signal generation unit, 310 input unit, 330 pseudo signal generation unit, 340 output unit, 820 input I / F, 842 clock, 900 CPU, 930 memory.

Claims (10)

A vehicle operating on a defined route;
A plurality of positioning signal generating devices arranged along the route, each positioning signal generating device,
Receiving means for receiving first positioning signals including data for positioning from at least three satellites, and each of the first positioning signals includes the satellites that have transmitted the first positioning signals; Encoded with a first identification code for identification;
Generating means for generating a second positioning signal different from the first positioning signal based on the first positioning signal, wherein the second positioning signal is different from the first identification code; Encoded with an identification code,
Including a transmission means for transmitting the second positioning signal;
The vehicle is
Receiving means for receiving the second positioning signal;
Calculating means for calculating position information based on the second positioning signal;
A positioning signal transmission system including information transmission means for transmitting the position information. A positioning signal transmission system for transmitting a positioning signal toward a vehicle operating on a predetermined route, wherein the vehicle receives the signal and transmits the signal to the inside of the vehicle, and the positioning signal The transmission system includes a plurality of positioning signal generation devices arranged along the route, and each positioning signal generation device includes:
Receiving means for receiving first positioning signals including data for positioning from at least three satellites, and each of the first positioning signals includes the satellites that have transmitted the first positioning signals; Encoded with a first identification code for identification;
Generating means for generating a second positioning signal different from the first positioning signal based on the first positioning signal, wherein the second positioning signal is different from the first identification code; Encoded with an identification code,
A positioning signal transmission system including transmission means for transmitting the second positioning signal. The receiving means receives the encoded first positioning signal;
The generating means includes
Decoding means for decoding the encoded first positioning signal;
The positioning signal transmission system according to claim 2, further comprising: encoding means for generating the second positioning signal by encoding the decoded signal based on the second identification code. The positioning signal generation device further includes storage means for storing the second identification code,
The positioning signal transmission system according to claim 3, wherein the encoding unit generates the second positioning signal based on a second identification code stored in the storage unit. The receiving means receives four positioning signals,
The generating means generates four second positioning signals corresponding to each of the first positioning signals based on each of the four first positioning signals,
The positioning signal transmission system according to claim 2, wherein the transmission means transmits each of the four second positioning signals. The vehicle is an automobile traveling on the route,
The positioning signal generation system according to claim 2, wherein each of the positioning signal generation devices is installed on a pillar disposed along the route.   The positioning signal transmission system according to claim 2, wherein the vehicle is a vehicle that travels on the route in a predetermined site. The vehicle is a railway vehicle,
The positioning signal transmission system according to claim 2, wherein each of the positioning signal generation devices is installed on a pillar for supporting the railway overhead line.   The positioning signal transmission system according to claim 8, wherein the pillar for supporting the railway overhead line is disposed outdoors.   The positioning signal transmission system according to claim 2, wherein a distance between each of the positioning signal generation devices is less than a range in which a signal transmitted by the transmission means reaches.

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