JP6269123B2 - Device with positioning function, positioning result receiving device, and positioning result utilization system - Google Patents

Description

  The present invention relates to a device with a positioning function for positioning the position of its own device based on a signal received from an artificial satellite used in a satellite positioning system, and a positioning result receiving device for receiving information on the position measured by the device with the positioning function. And a positioning result use system including the positioning function-equipped device and the positioning result receiving device.

  2. Description of the Related Art Conventionally, a technique is known in which a signal from an artificial satellite used in a satellite positioning system is received by a receiver to determine the position of the own device.

  However, in recent years, the development of repeaters that replicate signals from satellites and simulators that can artificially generate signals from satellites has caused problems such as falsification of location information and spoofing by malicious actors. ing.

  On the other hand, Patent Document 1 discloses a technique for authenticating whether a signal received by the device itself is a regular signal from an artificial satellite used in a satellite positioning system. In the technique disclosed in Patent Document 1, the receiver accesses the authentication center database from the satellite number and the satellite time included in the signal received by the device itself from the artificial satellite, and uses the data for the authentication of the target artificial satellite. To get. Then, the receiver uses the data acquired from the authentication center to authenticate whether the signal received by the device is a normal signal from an artificial satellite used in the satellite positioning system.

JP 2013-130395 A

  In the technique disclosed in Patent Document 1, each time a positioning is performed, the receiver needs to authenticate whether each of the signals from the plurality of artificial satellites used for positioning is a legitimate signal. Therefore, when this authentication is performed for signals from all artificial satellites used for positioning, a long waiting time is required until the authentication is completed due to the trouble of accessing the authentication center and acquiring data. Become.

  Assuming that the positioning result at the receiver is used in an application or system that uses location information, in a system that charges a parking fee according to the location, the positioning result must be highly reliable. It is thought that it is necessary to wait until all the authentications are completed. On the other hand, in applications such as games that use location information, the reliability of positioning results may be low, so waiting for all the above authentications to complete before outputting the positioning results at the receiver will waste time. turn into.

  The present invention has been made in view of the above-described conventional problems, and its purpose is to provide an application or system that uses a positioning result obtained based on a signal from an artificial satellite used in a satellite positioning system. To provide a device with a positioning function, a positioning result receiving device, and a positioning result utilization system that enable flexible use of positioning results according to the reliability of positioning results required for applications and systems. .

The positioning result receiving device of the present invention is a device with a positioning function that authenticates that signals received by a satellite receiver (230) from a plurality of artificial satellites used in a satellite positioning system are legitimate signals from artificial satellites ( 200) positioning result receiving devices (300, 400) including positioning result receiving processing units (S42, S61, S81) that receive positioning results transmitted from the positioning result receiving device, and the positioning result receiving processing unit is a device with a positioning function. Of the satellites used for positioning, and receives the positioning result given the authentication level based on at least one of the number and proportion of the satellites that have been authenticated, and received by the positioning result reception processing unit A second execution unit (S75, S96) that executes a positioning result use process, which is a process that uses the positioning result, and an authentication level assigned to the positioning result received by the positioning result reception processing unit. Depending on le second usage determining unit for determining whether to use the positioning result to the positioning result using process (S43, S44, S45, S63 , S68, S84, S89) and a positioning result receiving unit Is to receive a positioning result to which an authentication level is given from an apparatus with a positioning function used for a mobile body, and when the condition for starting the positioning result use process is satisfied and the positioning result is received. When the authentication level received by the processing unit is lower than the authentication level requested by the positioning result use process, the second storage processing unit (S65) that sequentially stores the positioning result from the time when the condition for starting the positioning result use process is satisfied. , S86), and when the authentication level received by the positioning result reception processing unit reaches the authentication level requested by the positioning result use processing, the positioning result to which this authentication level has been assigned, A second continuity determination unit (S70, S91) that determines whether there is continuity with the past positioning results sequentially stored in the processing unit, and the second execution unit is a second continuity determination unit If it is determined that there is continuity it is characterized target and to Rukoto used for the second storage processor in sequential memorized past positioning results positioning result using process.

  According to this, even if only a part of the artificial satellite used for positioning by the device with positioning function can be authenticated, it is possible to determine how reliable the positioning result is based on the authentication level. become. Therefore, according to the level of the authentication level, the second usage determining unit can determine whether to execute an application or a system that uses the positioning result. For example, even when the authentication level is low, it is possible to determine that an application or system having a low reliability of a required positioning result is to be executed.

  As a result, in applications and systems that use positioning results based on signals from artificial satellites used in satellite positioning systems, the positioning results can be flexibly changed according to the reliability of the positioning results required for the applications and systems. It becomes possible to be able to utilize.

In addition, another device with a positioning function of the present invention is used for a moving body, and includes a satellite receiver (530) that receives a signal from an artificial satellite used in a satellite positioning system, and a plurality of satellite receivers. A positioning unit (S1) for positioning the position of the device based on a signal received from the artificial satellite, and authentication information necessary for authenticating that the signal is a legitimate signal from the artificial satellite. The authentication information acquisition unit (S5) acquired from the authentication center provided outside and the authentication information acquisition unit that the signal received by the satellite receiver is a legitimate signal from the artificial satellite Device (500) having a positioning function including an authentication unit (S9, S10, S11) that performs authentication using the information for use, and was authenticated by the authentication unit of the artificial satellites used for positioning by the positioning unit At least the number and proportion of satellites An authentication level calculation unit (S102) that calculates an authentication level based on the deviation, a first execution unit (S135, S156) that executes a positioning result use process that is a process using the positioning result measured by the positioning unit, and authentication A first usage determination unit (S104, S105, S106, S123, S128, S144, which determines whether or not to use the positioning result measured by the positioning unit for the positioning result use process according to the authentication level calculated by the level calculation unit. S149) and if the conditions for starting the positioning result use process are satisfied and the authentication level calculated by the authentication level calculation unit is lower than the authentication level required by the positioning result use process, the positioning result use The first storage processing unit (S125, S146) that sequentially stores the positioning results from the time when the conditions for starting the processing are satisfied, and the authentication level calculated by the authentication level calculation unit When the level reaches the authentication level required by the positioning result use process, the positioning result when the authentication level reaches the authentication level required by the positioning result use process and the past positioning sequentially stored in the first storage processing unit A first continuity determination unit (S129, S150) that determines whether the result has continuity , and the first execution unit determines that the first continuity determination unit determines that there is continuity the past positioning results of the sequentially stored in the first storage processing unit also features a subject and to Rukoto used for positioning result using process.

  According to this, of the artificial satellites used for positioning in the positioning unit, the authentication function based on at least one of the number and the ratio of the artificial satellites that can be authenticated using the authentication information acquired from the authentication center. A sticking device can be obtained. Since it takes time to perform authentication using the authentication information acquired from the authentication center, it is considered that a situation where only a part of the artificial satellite used for positioning by the positioning unit can be authenticated frequently occurs. Thus, even when only a part of the artificial satellite used for positioning can be authenticated, the device with a positioning function can determine how reliable the positioning result is based on the authentication level. Become. Therefore, according to the level of the authentication level, it is possible for the first usage determining unit to determine whether to execute an application or system that uses the positioning result. For example, even when the authentication level is low, it is possible to determine that an application or system having a low reliability of a required positioning result is to be executed.

As a result, in applications and systems that use positioning results based on signals from artificial satellites used in satellite positioning systems, the positioning results can be flexibly changed according to the reliability of the positioning results required for the applications and systems. It becomes possible to be able to utilize.
Since the positioning result use system of the present invention includes the positioning function-equipped device and the positioning result receiving device described above, the application that uses the positioning result obtained based on the signal from the artificial satellite used in the satellite positioning system. It is possible to flexibly utilize the positioning result in accordance with the reliability of the positioning result required for the application or system.

It is a figure which shows an example of a schematic structure of the positioning result utilization system 1 in Embodiment 1. FIG. 2 is a block diagram illustrating an example of a schematic configuration of an authentication center 120. FIG. 3 is a block diagram illustrating an example of a schematic configuration of an in-vehicle device 200. FIG. 6 is a flowchart illustrating an example of a flow of authentication-related processing in the in-vehicle device 200 according to the first embodiment. 6 is a flowchart illustrating an example of a flow of position information transmission related processing in the in-vehicle device 200 according to the first embodiment. 6 is a flowchart illustrating an example of a flow of position information use related processing in the roadside device 300 according to the first embodiment. 10 is a flowchart illustrating an example of a flow of road billing related processing in a roadside device 300 in Modification 2. It is a schematic diagram for demonstrating the continuity of a positional information. 12 is a flowchart illustrating an example of a flow of parking charge related processing in a roadside device 300 in Modification 3. It is a figure which shows an example of a schematic structure of the positioning result utilization system 1a in Embodiment 2. FIG. 3 is a block diagram illustrating an example of a schematic configuration of a location information utilization device 400. FIG. It is a figure which shows an example of a schematic structure of the positioning result utilization system 1b in Embodiment 3. 4 is a block diagram illustrating an example of a schematic configuration of a mobile terminal 500. FIG. 14 is a flowchart illustrating an example of a flow of position information use related processing in the mobile terminal 500 in the third embodiment. 12 is a flowchart illustrating an example of a flow of road charging related processing in the mobile terminal 500 in Modification 2. 12 is a flowchart illustrating an example of a flow of parking charge-related processing in the mobile terminal 500 in Modification 3.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the positioning result utilization system 1 in Embodiment 1 includes a monitor station 110, an authentication center 120, a master control station 130, an in-vehicle device 200, and a roadside device 300. The in-vehicle device 200 corresponds to the device with a positioning function in the claims, and the roadside device 300 corresponds to the positioning result receiving device in the claims.
<Schematic configuration of positioning result utilization system 1>
The monitor station 110 receives GPS radio waves transmitted by the GPS satellites 2a to 2c included in the GPS which is one of the satellite positioning systems. The GPS satellites 2a to 2c correspond to the artificial satellites recited in the claims. Hereinafter, the GPS satellites 2a to 2c are expressed as GPS satellites 2 when not distinguished from each other. As is well known, navigation messages are included in GPS radio waves. The monitor station 110 demodulates the received GPS radio wave, extracts a navigation message, and sends it to the authentication center 120. The navigation message corresponds to the signal from the artificial satellite in the claims. When GPS radio waves are received from a plurality of GPS satellites 2, a navigation message is extracted from each GPS radio wave and sent to the authentication center 120.

  The authentication center 120 creates parity data from the navigation message and the H matrix that is the encryption key. Then, a signal including this parity data is sent to the master control station 130. In addition, communication with the in-vehicle device 200 is also performed. A detailed description of the authentication center 120 will be given later with reference to FIG.

  The master control station 130 transmits the parity data received from the authentication center 120 to the quasi-zenith satellite (hereinafter referred to as QZS satellite) 3. The QZS satellite 3 broadcasts a navigation message including parity data toward the ground.

  The in-vehicle device 200 is a navigation message authentication type in-vehicle device. The in-vehicle device 200 communicates with the authentication center 120 to authenticate that the navigation message received from the GPS satellite 2 is a regular navigation message. Authentication is sequentially performed for all GPS satellites 2 used for positioning. However, since it takes time, some GPS satellites are used until the authentication of all GPS satellites 2 used for positioning is completed. There arises a situation where only two are authenticated. Details of the authentication will be described later with reference to FIG.

  The in-vehicle device 200 measures the current position of the own device using the navigation messages received from the plurality of GPS satellites 2. It is necessary to use navigation messages received from at least three GPS satellites 2 for positioning the current position.

  Furthermore, the in-vehicle device 200 calculates a ratio (hereinafter, “authentication level”) of the GPS satellites 2 that have been able to authenticate the above navigation message among the GPS satellites 2 used for positioning. For example, if there are three GPS satellites 2 used for positioning and one GPS satellite 2 can be authenticated, the authentication level is 1/3 (that is, 33.3%). Then, the calculated authentication level is added to the position information indicating the current position obtained by positioning, and the information is wirelessly transmitted to the outside. A detailed description of the in-vehicle device 200 will be given later with reference to FIG.

  The roadside device 300 is a terminal of a system that executes a process of providing a predetermined service using position information transmitted from the in-vehicle device 200. For example, in the process of providing the service, when it is determined that the vehicle equipped with the vehicle-mounted device 200 is parked in a toll parking area, or when it is determined that the vehicle has traveled on a toll road, the user of the vehicle There is a billing process for automatically billing.

  Further, the roadside device 300 determines whether or not to use the position information for the processing using the position information in accordance with the authentication level given to the position information transmitted from the in-vehicle device 200, and determines the determination result. Depending on the location information, it may or may not be used.

<Detailed Configuration of Authentication Center 120>
As shown in FIG. 2, the authentication center 120 includes a control unit 122, a data storage unit 124, and a communication unit 126.

  The control unit 122 is a computer including a CPU, a ROM, a RAM, and the like, and controls the data storage unit 124 and the communication unit 126. In addition, the CPU executes a program stored in the ROM while using the temporary storage function of the RAM, so that the RAND message generation unit 1221, the SEED value generation unit 1222, the H matrix calculation unit 1223, the parity calculation unit 1224, It functions as the signal processing unit 1225. Note that the functions of these units 1221 to 1225 may be the same as the functions disclosed in Patent Document 1.

  The RAND message generator 1221 creates a RAND message from the navigation message acquired from the monitor station 110. In the RAND message, TOW (time of week), TOC, AF0, and AF1 for specifying the signal generation time are arranged in order from the bit string of the navigation message. Further, an AS Flag that is an anti-spoof flag and a PRN (Pseudo Random Noise) ID that is a satellite number are added. The RAND including the TOW and PRN ID can be said to be data indicating which GPS satellite transmitted when. Since TOW changes every 6 seconds and includes PRNID, RAND is generated for every GPS satellite 2 received by monitor station 110 and every 6 seconds.

  The SEED value generation unit 1222 generates a SEED value by generating a random number with the PC clock as an input.

  The H matrix calculation unit 1223 uses the SEED value generated by the SEED value generation unit 1222 and calculates an H matrix corresponding to the SEED value on a one-to-one basis. As the H matrix, a known hash function may be used. For example, a parity check matrix for performing LDPC (Low Density Parity Check) encoding may be used. Furthermore, a generator matrix determined from a parity check matrix may be used.

  The parity calculation unit 1224 calculates parity data based on the RAND message generated by the RAND message generation unit 1221 and the H matrix calculated by the H matrix calculation unit 1223. That is, parity data is calculated by multiplying the RAND message by this H matrix.

  The signal processing unit 1225 inserts the parity data calculated by the parity calculation unit 1224 and the RAND message used for the calculation into the navigation message transmitted from the QZS satellite 3. Then, the inserted navigation message is sent to the master control station 130.

  Further, the signal processing unit 1225 associates the parity data calculated by the parity calculation unit 1224, the RAND message used for calculating the parity data, the H matrix, and the SEED value used for the calculation of the H matrix in accordance with the signal insertion. And stored in the data storage unit 124.

  This signal processing unit 1225 inserts the RAND message and parity data into the navigation message that causes the QZS satellite 3 to transmit each time the RAND message generation unit 1221 generates the RAND message. Therefore, the RAND message generation unit 1221, the SEED value generation unit 1222, the H matrix calculation unit 1223, and the parity calculation unit 1224 also execute processing each time the RAND message generation unit 1221 generates a RAND message.

  When the communication unit 126 receives the PRNID, TOW, and public key transmitted from the in-vehicle device 200, the H matrix selection unit 1226 converts the H matrix stored in the data storage unit 124 into the received PRNID and TOW. Select the corresponding H matrix. Then, the selected H matrix is encrypted with the public key, and the encrypted H matrix is returned to the in-vehicle device 200.

<Detailed configuration of in-vehicle device 200>
The navigation message broadcast by the QZS satellite 3 is received by the receiving unit 211 provided in the communication unit 210 of the in-vehicle device 200. As shown in FIG. 3, the in-vehicle device 200 includes a communication unit 210, a control unit 220, and a satellite receiver 230.

  The communication unit 210 includes a reception unit 211 and a transmission unit 212. The communication unit 210 has a narrow area communication function and a wide area communication function. The narrow area communication function has a communication distance of several hundred meters, for example. The wide-area communication function has a communication distance of several kilometers, for example, and can communicate with other communication devices in the communication area of the public communication network by communicating with the base station of the public communication network. The narrow area communication function communicates with the communication unit 310 of the roadside machine 300, and the wide area communication function communicates with the communication unit 126 of the authentication center 120.

  The satellite receiver 230 receives radio waves transmitted by the GPS satellite 2 and the QZS satellite 3 at a constant period.

The control unit 220 is a computer including a CPU, a ROM, a RAM, and the like, and controls the communication unit 210 and the satellite receiver 230. Further, the CPU executes the program stored in the ROM while using the temporary storage function of the RAM, thereby executing the authentication related process shown in FIG. 4 and the position information transmission related process shown in FIG.
<Authentication-related processing>
Subsequently, with respect to processing related to authentication that the signal received by the satellite receiver 230 in the control unit 220 of the in-vehicle device 200 is a regular navigation message received from the GPS satellite 2 (hereinafter referred to as authentication-related processing) This will be described with reference to the flowchart shown in FIG. The flowchart in FIG. 4 may be executed every time the satellite receiver 230 receives GPS radio waves from three or more GPS satellites 2, for example.

  Here, the satellite receiver 230 mistakenly transmits a signal from a repeater that duplicates a signal from the GPS satellite 2 or a simulator that can artificially generate a signal from the GPS satellite 2 as a navigation message included in the GPS radio wave. It may be received.

  First, in step S <b> 1, the current position of the own apparatus is measured based on a navigation message included in GPS radio waves received from a plurality of GPS satellites 3 or more. This S1 corresponds to the positioning unit in the claims.

  In step S <b> 2, the navigation message received from the QZS satellite 3 is acquired from the receiving unit 211.

  In step S3, PRNID and TOW are extracted from the navigation message acquired in S1.

  In step S4, the PRNID and TOW extracted in step S3 are transmitted from the transmission unit 212 to the authentication center 120 together with the public key. As described above, the authentication center 120 encrypts the H matrix determined by the PRNID and TOW with the public key and transmits the encrypted H matrix to the in-vehicle device 200.

  In step S <b> 5, the H matrix transmitted from the authentication center 120 is acquired from the receiving unit 211. This S5 corresponds to the authentication information acquisition unit in the claims. In step S6, the encrypted H matrix acquired in S5 is decrypted with the secret key.

  In step S7, a RAND message is created from the navigation message including the same PRNID as the PRNID transmitted in step S4 among the navigation messages included in the GPS radio wave received from the GPS satellite 2.

  In step S8, comparison parity data is created from the RAND message created in S7 and the H matrix decoded in S6.

  In step S9, it is determined whether or not the comparison parity data created in S8 matches the parity data extracted in S3.

  The H matrix decrypted in S6 is the same as the H matrix used by the authentication center 120 to create parity data. The parity calculation unit 1224 of the authentication center 120 calculates parity data based on the H matrix and the RAND message.

  Therefore, when the comparison parity data created in S8 matches the parity data extracted in S3, it can be considered that the RAND message created in S7 is the same as the RAND message created by the authentication center 120.

  Therefore, if the comparison parity data created in S8 matches the parity data extracted in S3 (YES in S9), the process proceeds to step S10 and authentication is established. On the other hand, if the two parity data do not match (NO in S9), the process proceeds to step S11 and authentication is not established. S9 to S11 correspond to an authentication unit in claims. After S10 and S11, the process proceeds to step S12.

In step S12, when it is determined whether authentication has been established or not established for all navigation messages used for positioning in S1 (YES in S12), the processing in FIG. 4 ends. On the other hand, if at least one of the navigation messages used for positioning in S1 has not been determined to be established or not established (YES in S12), the process returns to S2 and the process is repeated.
<Position information transmission related processing>
Next, processing related to transmission of position information to the roadside device 300 (hereinafter, position information transmission related processing) in the control unit 220 of the in-vehicle device 200 will be described using the flowchart shown in FIG. In the position information transmission related process, in addition to the position information indicating the current position measured by the in-vehicle device 200, an authentication level that is the number and ratio of the GPS satellites 2 that have been authenticated among the GPS satellites 2 used for positioning is also given. Then send. The flowchart of FIG. 5 may be configured to start when a position information request signal is received from the communication unit 310 of the roadside device 300, or may be configured to start at a constant cycle.

  The processing shown in the flowchart of FIG. 5 and the processing shown in the flowchart of FIG. 4 are performed in parallel, and even if the authentication in the flowchart of FIG. 4 is not completed for all the navigation messages used for positioning, FIG. It is assumed that the flowchart is started.

  First, in step S21, the current position of the own device measured in step S2 of the flowchart of FIG. 4 is acquired. The acquired current position is stored in an electrically rewritable memory such as a RAM or an EEPROM of the control unit 220. When accumulating the acquired current position in the memory, information on the time when the current position is measured (that is, a time stamp) is linked and accumulated.

  In step S22, an authentication level that is a ratio of the GPS satellites 2 that can be authenticated at the present time in the flowchart of FIG. 4 among the GPS satellites 2 used for positioning of the current position acquired in S21 is calculated. For example, if there are three GPS satellites 2 used for positioning and one GPS satellite 2 can be authenticated, the authentication level is 33.3%. This step S22 corresponds to an authentication level calculation unit in the claims.

  In the present embodiment, the example in which the ratio of the GPS satellites 2 that can be authenticated among the GPS satellites 2 used for positioning is set as the authentication level is shown, but the present invention is not necessarily limited thereto. For example, the authentication level may be the number of GPS satellites 2 that can be authenticated. In this case, if there are four GPS satellites 2 used for positioning and four GPS satellites 2 have been authenticated, the authentication level is 4. In addition, it is based on at least one of the number and the ratio, such as a value determined from the number and ratio of the GPS satellites 2 that can be authenticated among the GPS satellites 2 used for positioning, and a value determined from the ratio and the satellite arrangement. The value may be the authentication level.

  In step S23, the current position stored in the memory in S21 is read together with a time stamp. Then, transmission data including the position information indicating the read current position, the time stamp, and the authentication level calculated in S22 is generated according to a standard format.

  Note that the transmission data may include a traveling direction and a vehicle speed of a vehicle on which the in-vehicle device 200 is mounted. As for the vehicle speed, a configuration using the one detected by the wheel speed sensor may be used, or a configuration in which the vehicle speed is specified by calculating the moving distance per unit time from the position information of a plurality of points arranged in time series. . In addition, the vehicle traveling direction may be configured to use the one detected by the geomagnetic sensor, or the direction in which the approximate line obtained by the least square method from the position information of a plurality of points arranged in time series extends is the vehicle traveling direction. It is good also as a structure specified as.

  In step S24, the transmission data including the position information, time stamp, and authentication level generated in S23 is transmitted via the transmission unit 212, and the process ends. This S24 corresponds to the positioning result transmission processing unit in the claims.

<Detailed configuration of roadside machine 300>
The roadside machine 300 includes a communication unit 310 and a control unit 320 as shown in FIG. The communication unit 310 performs wireless communication with the communication unit 126 included in the authentication center 120 and the communication unit 210 included in the in-vehicle device 200.

  The control unit 320 is a computer that includes a CPU, a ROM, a RAM, and the like, and controls the communication unit 310. Further, the CPU executes the program stored in the ROM while using the temporary storage function of the RAM, thereby executing the usage determination related process shown in FIG.

<Use determination related processing>
Here, the processing related to the determination of the use of the position information transmitted from the in-vehicle device 200 in the control unit 320 of the roadside device 300 (hereinafter referred to as “use determination related processing”) will be described using the flowchart shown in FIG. Do. In the use determination related process, whether or not to use the position information for the process using the position information (hereinafter referred to as position information use process) according to the authentication level given to the position information transmitted from the in-vehicle device 200. to decide. The flowchart in FIG. 6 may be configured to start when the communication unit 310 of the roadside device 300 receives transmission data transmitted from the in-vehicle device 200, for example. The position information use process corresponds to the positioning result use process in the claims.

  First, in step S41, an authentication level corresponding to the reliability of the position information requested by the position information use process, that is, an authentication level requested by the position information use process (hereinafter referred to as a request authentication level) is specified.

  For the roadside device 300, when there is only one type of position information use processing and the request authentication level is a fixed value, the fixed value may be specified as the request authentication level. On the other hand, when there are a plurality of types of location information use processing for the roadside device 300, the request authentication level corresponding to the location information use processing that the roadside device 300 intends to execute is set as the type of location information use processing and the request authentication level. May be configured to be identified with reference to a correspondence relationship associated beforehand.

  For example, if the location information usage process is a charging process that charges for parking in a toll parking area or traveling on a toll road, it is necessary to avoid being charged erroneously. Set the level high. On the other hand, if the location information use process is a process that does not require highly reliable location information, such as a game that uses location information, you can play immediately rather than waiting until the reliability becomes high Therefore, the request authentication level is set low. As described above, the higher the reliability of the position information required in the position information utilization process, the higher the request authentication level.

  The processing in step S41 may be omitted by specifying in advance when the request authentication level is a fixed value.

  In step S42, the transmission data received by the communication unit 310 is acquired from the communication unit 310, and the position information, time stamp, authentication level, and the like included in the transmission data are acquired. This S42 corresponds to the positioning result reception processing unit in the claims.

  In step S43, it is determined whether or not the authentication level acquired in S42 has reached the request authentication level specified in S41. For example, the location information use process is a charging process for charging for parking in a toll parking area or traveling on a toll road. If the request authentication level is 100%, the authentication level acquired in S42 is If it is not 100%, it is determined that the required authentication level has not been reached. On the other hand, if the location information use process is a game that uses location information and the request authentication level is 33%, even if the authentication level acquired in S42 is not 100%, it has reached 33%. It is determined that the required authentication level has been reached.

  If it is determined in step S43 that the required authentication level has been reached (YES in S43), the process proceeds to step S44, and the position information acquired in S41 is set as the target of the position information utilization process. On the other hand, if it is determined that the required authentication level has not been reached (NO in S43), the process proceeds to step S45, and the position information acquired in S42 is not subject to the position information utilization process. S43 to S45 correspond to a second usage determination unit in claims.

  The control unit 320 does not use the position information determined not to be the target of the position information use process in the use determination related process for the position information use process. On the other hand, the position information determined to be the target of the position information use process in the use determination related process is used for the position information use process. An example of a charging process for charging for parking in a toll parking area or traveling on a toll road is as follows.

  The location information that is determined not to be subject to location information usage processing in the usage judgment related processing is not subject to billing even if it falls within the billing target area and is not charged. On the other hand, if the location information determined to be the location information usage processing target in the usage determination related processing falls under the area to be charged, it is charged and charged. The control unit 320 corresponds to a second execution unit in the claims.

<Summary of Embodiment 1>
According to the first embodiment, in the roadside device 300 that performs the processing using the position information transmitted from the in-vehicle device 200, the processing using the position information is executed according to the level of the authentication level given to the position information. It can be determined whether or not. For example, charging processing with high reliability of required location information is not executed unless the authentication level is high, whereas a game with low reliability of required location information is executed even when the authentication level is low. It becomes possible to do.

As a result, in applications and systems that use positioning results based on navigation messages from the GPS satellite 2 used in the satellite positioning system, the positioning results are determined according to the reliability of the positioning results required for the application or system. It can be used flexibly.
<Modification 1>
In Embodiment 1, although the roadside machine 300 was demonstrated as a positioning result receiving apparatus, it is not restricted to this. The positioning result receiving device may be a mobile device such as mounted on a vehicle other than the vehicle on which the in-vehicle device 200 is mounted. As the position information use process executed by this mobile device, for example, the position information received from the in-vehicle device 200 is used, and the distance between the vehicle on which the in-vehicle device 200 is mounted is maintained at an appropriate distance. There is a follow-up running process to run. In this follow-up running process, position information with high reliability is required, and therefore, the request authentication level may be set high.
<Modification 2>
In the first embodiment, the case where the location information use process is a billing process for charging a toll road (hereinafter referred to as a road billing process) has been described. However, in the configuration of the first embodiment, the vehicle is actually charged. Even when the vehicle is traveling on the road, if the authentication level given to the position information received by the roadside device 300 from the in-vehicle device 200 mounted on the vehicle does not reach the required authentication level of the road billing process, There is a problem that billing is not possible.

  In order to solve the above problems, it is preferable to adopt the configuration of Modification 2 below. The modification 2 is the same as that of Embodiment 1 except that the processing in the control unit 320 of the roadside device 300 is partially different. Specifically, the second modification is different from the first embodiment in that the control unit 320 performs a road billing related process instead of the use determination related process and the position information use process of the first embodiment.

<Road Charging Related Processing in Modification 2>
Here, the road billing related process in the second modification will be described with reference to the flowchart shown in FIG. In road billing-related processing, position information at the time when the authentication level does not reach the required authentication level is also stored in sequence, and position information at the time when the authentication level reaches the required authentication level is also stored in the past. It is treated as an object of road billing processing.

  The flowchart in FIG. 7 may be configured to start when the communication unit 310 of the roadside device 300 receives transmission data transmitted from the in-vehicle device 200, for example. Here, a description will be given assuming that the request authentication level corresponding to the road billing process is specified in advance.

  First, in step S61, transmission data received by the communication unit 310 is acquired from the communication unit 310, and position information, a time stamp, an authentication level, and the like included in the transmission data are acquired. This step S61 also corresponds to the positioning result reception processing unit in the claims.

  In step S62, it is determined whether or not a road billing condition is satisfied. For example, when the position indicated by the position information acquired in S61 is located in an area that is subject to road billing, it is determined that the road billing condition is satisfied, and the position indicated by the position information acquired in S61 is the road If it is not located in the area to be charged, it is determined that the road charging condition is not satisfied. If it is determined that the road billing condition is satisfied (YES in S62), the process proceeds to step S63. On the other hand, if it is determined that the road billing condition is not satisfied (NO in S62), the process is terminated.

  In step S63, it is determined whether or not the authentication level acquired in S61 has reached the required authentication level of the road billing process. If it is determined that the required authentication level has been reached (YES in S63), the location information acquired in S61 is set as the object of the road billing process, and the process proceeds to step S73. On the other hand, if it is determined that the requested authentication level has not been reached (NO in S63), the location information acquired in S61 is temporarily not subject to road billing processing, and the process proceeds to step S64. This S63 corresponds to a second usage determination unit in the claims.

  In step S64, a notification process is performed to notify the user that there is a possibility of being charged later. In the notification process, for example, information including an instruction to notify the user that there is a possibility of being charged later is transmitted to the in-vehicle device 200 via the communication unit 310. Then, the vehicle-mounted device 200 notifies the user that there is a possibility of being charged later from a display device or audio output device (not shown). This S64 corresponds to the second notification processing unit in the claims.

  According to this, even if the authentication level does not reach the required authentication level at the present time and is not subject to road billing, the user can be recognized that it may be billed later. Can do. As a result, even if the authentication level reaches the required authentication level in the future and a travel section that has not been subject to road billing is retroactively subject to road billing, the change is not unexpected for the user. Note that the process of S64 may be omitted.

  In step S65, the position information acquired in S61 is stored in an electrically rewritable memory such as a RAM or an EEPROM of the control unit 320. S65 corresponds to the second storage processing unit in the claims.

  In step S66, when new transmission data is received from the in-vehicle device 200 (YES in S66), the newly received position information, time stamp, authentication level, and the like are acquired, and the process proceeds to step S67. On the other hand, if new transmission data has not been received (NO in S66), the process of S66 is repeated.

  In step S67, it is determined whether or not the road billing condition is not satisfied. If it is determined that the road billing condition is no longer satisfied (YES in S67), the process is terminated. On the other hand, if it is determined that the road billing condition is satisfied (NO in S67), the process proceeds to step S68.

  In step S68, it is determined whether or not the authentication level acquired in S66 has reached the required authentication level of the road billing process. If it is determined that the required authentication level has been reached (YES in S68), the location information acquired in the latest S66 is set as the object of the road billing process, and the process proceeds to step S69. On the other hand, if it is determined that the required authentication level has not been reached (NO in S68), the location information acquired in the most recent S66 is temporarily not subject to road billing processing, and the process returns to S65 and acquired in S66. The position information and the like are stored in the memory, and the process is repeated. This S68 also corresponds to the second usage determination unit in the claims.

  In step S69, it is determined whether or not there is continuity between the position information provided with the authentication level acquired in S66 and the past position information stored in S65. Whether or not there is continuity is determined by whether or not an error between the estimated position estimated from the past position information and the position indicated by the position information to which the authentication level acquired in S66 is within a threshold value. . The threshold is a value that can be arbitrarily set.

  The estimated position is a position estimated from the position information or the like sequentially stored in S65. When the vehicle speed and the traveling direction are acquired from the in-vehicle device 200 in addition to the positional information, the time of the positional information to which the authentication level acquired in S66 has been given from the past positional information and the vehicle speed and the traveling direction. The estimated position at the time indicated by the stamp may be estimated. Even when the vehicle speed and the traveling direction are not acquired from the in-vehicle device 200, the vehicle speed and the traveling direction are calculated as described above from the position information of the plurality of points sequentially stored in S65, and the estimated position is estimated. That's fine.

  If it is determined in step S70 that there is continuity (YES in S70), the process proceeds to step S71, and the past location information stored in S65 is also subject to road billing processing. On the other hand, if it is determined that there is no continuity (NO in S70), the process proceeds to step S72, and it is determined that the past location information stored in S65 is not subject to road billing processing. S70 corresponds to the second continuity determination unit in the claims.

  As shown in FIG. 8A, the position information to which the authentication level acquired in S66 has been assigned (see black circles indicated by HV in the figure) and the positional information sequentially stored in S65 (see white circles in the figure). If there is continuity, it is considered that the positional information sequentially stored in S65 is highly reliable, so the past positional information stored in S65 is also subject to road billing processing.

  As shown in FIG. 8B, the position information (refer to black circles indicated by HV in the figure) provided with the authentication level acquired in S66 and the position information sequentially stored in S65 (see white circles in the figure). If there is no continuity and there is a divergence, the reliability of the position information sequentially stored in S65 is not considered high, so the past position information stored in S65 is excluded from the road billing process.

  After S71 and S72, the process proceeds to step S73. In step S73, when new transmission data is received from the in-vehicle device 200 (YES in S73), the newly received position information, time stamp, authentication level, and the like are acquired, and the process proceeds to step S74. On the other hand, if new transmission data has not been received (NO in S73), the process of S73 is repeated.

  In step S74, it is determined whether the road billing condition is no longer satisfied. If it is determined that the road billing condition is no longer satisfied (YES in S74), the process proceeds to step S75. On the other hand, if it is determined that the road billing condition is satisfied (NO in S74), the process returns to S73 and the process is repeated.

  In step S75, the charging process corresponding to the section in which the vehicle equipped with the vehicle-mounted device 200 travels on the toll road is performed, and the process ends. This S75 corresponds to a second execution unit in the claims. For example, if it continues to reach the required authentication level from when it is determined that the road charging condition is satisfied until it is determined that the condition is not satisfied, it is determined that the road charging condition is satisfied and then this condition is satisfied. The billing process is performed according to the interval until it is determined that the condition is no longer satisfied.

  In addition, there is a section that does not reach the required authentication level between the time when it is determined that the road charging condition is satisfied and the time when it is determined that the condition is not satisfied. In this case, the charging process corresponding to the section from the determination that the road charging condition is satisfied until the determination that the condition is not satisfied is performed.

  On the other hand, there is a section that does not reach the required authentication level between the time when it is determined that the road charging condition is satisfied and the time when it is determined that the condition is not satisfied. If it falls outside, it will be charged according to the section excluding the section that is not subject to the road billing process from the section from when it is determined that the road billing condition is met until it is determined that the condition is no longer met Process.

According to this, even if the vehicle is actually traveling on a toll road, it is possible to reduce the occurrence of trouble that cannot be charged.
<Modification 3>
In the first embodiment, the case where the location information use process is a billing process for charging for parking in a toll parking area (hereinafter referred to as a parking billing process) has been described. Even if the vehicle is parked in the paid parking area, the authentication level given to the position information received by the roadside device 300 from the in-vehicle device 200 mounted on the vehicle has not reached the required authentication level for the parking billing process. In this case, there is a problem that charging cannot be performed.

  In order to solve the above problems, it is preferable to adopt the configuration of Modification 3 below. The third modification is the same as the first embodiment except that the processing in the control unit 320 of the roadside device 300 is partially different. Specifically, the third modification is different from the first embodiment in that the control unit 320 performs a parking charge related process instead of the use determination related process and the position information use process of the first embodiment.

  Moreover, in the modification 3, the control part 220 of the vehicle equipment 200 continues and performs the above-mentioned authentication related process, also when parking of the own vehicle is detected. The control unit 220 may detect the parking of the host vehicle based on whether the parking brake is turned on, the ignition power supply is turned off, or the current position for sequential positioning does not change for a certain period of time.

<Parking fee-related processing in Modification 3>
Here, the parking charge related process in the third modification will be described with reference to the flowchart shown in FIG. In the parking billing related processing, position information at the time when the authentication level does not reach the required authentication level is also stored sequentially, and the position information at the time when the authentication level reaches the required authentication level is also stored in the past. , Handle as a parking billing target.

  The flowchart in FIG. 9 may be configured to start when, for example, the communication unit 310 of the roadside device 300 receives transmission data transmitted from the in-vehicle device 200. Here, description will be made assuming that the request authentication level corresponding to the parking billing process is specified in advance.

  First, in step S81, the position information, time stamp, authentication level, and the like included in the transmission data received by the communication unit 310 are acquired in the same manner as in S61 described above. This S81 also corresponds to the positioning result reception processing unit in the claims.

  In step S82, it is determined whether or not the vehicle on which the in-vehicle device 200 is mounted is parked. Whether or not the vehicle is parked may be determined based on whether or not the vehicle speed is substantially zero when the vehicle speed is acquired from the in-vehicle device 200 in addition to the position information. In addition, it may be configured to determine that the vehicle is parked based on the fact that the current position indicated by the sequentially acquired position information does not change for a certain time or more. This S82 corresponds to the second parking determination unit in the claims.

  In step S83, it is determined whether or not the parking charge condition is satisfied. For example, when the position indicated by the position information acquired in S81 is located in the area to be charged for parking, it is determined that the parking charge condition is satisfied, and the position indicated by the position information acquired in S81 is the parking charge. When it is not located in the area to be charged, it is determined that the parking charge condition is not satisfied. If it is determined that the parking charge condition is satisfied (YES in S83), the process proceeds to step S84. On the other hand, if it is determined that the parking billing condition is not satisfied (NO in S83), the process is terminated.

  In step S84, it is determined whether or not the authentication level acquired in S81 has reached the request authentication level of the parking billing process. If it is determined that the required authentication level has been reached (YES in S84), the location information acquired in S81 is set as the object of the parking billing process, and the process proceeds to step S94. On the other hand, if it is determined that the required authentication level has not been reached (NO in S84), the location information acquired in S81 is temporarily not subject to the parking billing process, and the process proceeds to step S85. This S84 corresponds to a second usage determination unit in the claims.

  In step S85, similarly to S64 described above, a notification process is performed to notify the user that there is a possibility of being charged later. This S85 corresponds to the second notification processing unit in the claims.

  According to this, even if the authentication level does not reach the required authentication level at the present time and is not subject to parking billing, the user can be recognized that it may be billed later. Can do. As a result, even if the authentication level reaches the required authentication level in the future and is subject to parking billing retroactively to the time zone that was not subject to parking billing, the change is not unexpected for the user. Note that the process of S85 may be omitted.

  In step S86, the position information acquired in S81 is stored in an electrically rewritable memory such as a RAM or an EEPROM of the control unit 320. This S86 corresponds to the second storage processing unit in the claims.

  In step S87, when new transmission data is received from the in-vehicle device 200 (YES in S87), the newly received position information, time stamp, authentication level, and the like are acquired, and the process proceeds to step S88. On the other hand, if new transmission data has not been received (NO in S87), the process of S87 is repeated.

  In step S88, it is determined whether or not parking charge conditions are no longer satisfied. If it is determined that the parking billing condition is no longer satisfied (YES in S88), the process ends. On the other hand, if it is determined that the parking billing condition is satisfied (NO in S88), the process proceeds to step S89.

  In step S89, it is determined whether or not the authentication level acquired in S87 has reached the required authentication level of the parking billing process. If it is determined that the required authentication level has been reached (YES in S89), the location information acquired in the latest S87 is set as the object of the parking billing process, and the process proceeds to step S90. On the other hand, if it is determined that the required authentication level has not been reached (NO in S89), the location information acquired in the latest S87 is temporarily not subject to parking billing processing, and the process returns to S86 and acquired in S87. The position information and the like are stored in the memory, and the process is repeated. This S89 also corresponds to the second usage determination unit in the claims.

  In step S90, it is determined whether or not there is continuity between the position information to which the authentication level acquired in S87 has been assigned and the past position information stored in S86. Whether or not there is continuity is determined based on whether or not an error between the position indicated by the past position information and the position indicated by the position information to which the authentication level acquired in S66 is within a threshold value. As an example, the determination is made based on whether or not an error between the position indicated by the past position information first stored in the memory at S86 and the position indicated by the position information to which the authentication level acquired at S66 is within a threshold value. The threshold is a value that can be arbitrarily set.

  If it is determined in step S91 that there is continuity (YES in S91), the process proceeds to step S92, and the past location information stored in S86 is also subject to parking billing processing. On the other hand, if it is determined that there is no continuity (NO in S91), the process proceeds to step S93, and it is determined that the past location information stored in S86 is not subject to the parking billing process. This S91 corresponds to the second continuity determination unit in the claims.

  After S92 and S93, the process proceeds to step S94. In step S94, when new transmission data is received from the in-vehicle device 200 (YES in S94), the newly received position information, time stamp, authentication level, and the like are acquired, and the process proceeds to step S95. On the other hand, if new transmission data has not been received (NO in S94), the process of S94 is repeated.

  In step S95, it is determined whether or not parking charge conditions are no longer satisfied. If it is determined that the parking billing condition is no longer satisfied (YES in S95), the process proceeds to step S96. On the other hand, if it is determined that the parking charge condition is satisfied (NO in S95), the process returns to S94 and the process is repeated.

  In step S96, a billing process is performed according to the time when the vehicle equipped with the vehicle-mounted device 200 is parked in the pay parking area, and the process is terminated. S96 corresponds to a second execution unit in the claims. For example, if it continues to reach the required authentication level from when it is determined that the parking fee condition is satisfied until it is determined that the condition is not satisfied, it is determined that the parking fee condition is satisfied and then this condition is satisfied. Charge processing is performed according to the time until it is determined that the condition is no longer satisfied. The time may be calculated by using the time stamp of the position information.

  In addition, there is a time zone that does not reach the required authentication level between the time when it is determined that the parking fee condition is satisfied and the time when it is determined that the condition is no longer satisfied, and the time zone is the parking fee process in S92. Even if it is subject to the above, a charging process corresponding to the time from when it is determined that the parking charging condition is satisfied until it is determined that this condition is not satisfied is performed.

  On the other hand, there is a time zone that does not reach the required authentication level between the time when it is determined that the parking fee condition is satisfied and the time when it is determined that the condition is not satisfied, and the time zone is charged in S93. If it is not subject to the parking charge process, it is determined that the parking charge condition has been satisfied, and the period from when it is determined that the condition is no longer satisfied to the time period excluding the parking charge process. The corresponding billing process is performed.

According to this, even if the vehicle is actually parked in the pay parking area, it is possible to reduce the occurrence of problems that cannot be charged.
(Embodiment 2)
As mentioned above, although Embodiment 1 of this invention was demonstrated, this invention is not limited to the above-mentioned Embodiment 1, The following Embodiment 2 is also contained in the technical scope of this invention. Hereinafter, the second embodiment will be described with reference to the drawings. For convenience of explanation, members having the same functions as those shown in the drawings used in the description of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 10, the positioning result utilization system 1 a according to the second embodiment includes a position information utilization device 400 that is used in a vehicle on which the in-vehicle device 200 is mounted, instead of the roadside device 300, as a positioning result reception device. Is the same as the positioning result utilization system 1 of the first embodiment.

<Detailed Configuration of Position Information Utilizing Device 400>
The position information utilization device 400 may be, for example, an in-vehicle navigation device or a mobile terminal used in a vehicle. Examples of the portable terminal applied as the position information utilization device 400 include a portable terminal that has a GPS function but does not perform the above-described authentication-related processing.

  As shown in FIG. 11, the position information utilization apparatus 400 is connected to the in-vehicle device 200 through, for example, an in-vehicle LAN, and includes a communication unit 410 and a control unit 420. The communication unit 410 communicates with the communication unit 210 included in the in-vehicle device 200. Here, a case where the in-vehicle device 200 and the position information utilization device 400 communicate via the in-vehicle LAN is taken as an example, but the in-vehicle device 200 and the position information utilization device 400 may perform wireless communication.

  The control unit 420 is a computer that includes a CPU, a ROM, a RAM, and the like, and controls the communication unit 410. In addition, the CPU executes the program stored in the ROM while using the temporary storage function of the RAM, so that the usage determination related process of the first embodiment, the road charging process of the second modification, and the parking charge of the third modification. A process similar to the process is executed. Therefore, the control unit 420 corresponds to a positioning result reception processing unit, a second usage determination unit, a second execution unit, a second storage processing unit, a second continuity determination unit, and a second parking determination unit.

  In the case where the control unit 420 determines whether or not the own vehicle is parked, the determination may be made based on a parking brake or ignition power signal that can be acquired via the in-vehicle LAN.

<Summary of Embodiment 2>
According to the second embodiment, as in the first embodiment, in the position information using apparatus 400 that performs processing using the position information transmitted from the in-vehicle device 200, according to the level of the authentication level given to the position information. It is possible to determine whether or not to execute processing that uses position information. Therefore, in applications and systems that use positioning results based on navigation messages from GPS satellites 2 used in the satellite positioning system, the positioning results can be flexibly adapted according to the reliability of the positioning results required for the application or system. Can be used for
(Embodiment 3)
The present invention is not limited to the first and second embodiments described above, and the following third embodiment is also included in the technical scope of the present invention. Hereinafter, the third embodiment will be described with reference to the drawings. For convenience of explanation, members having the same functions as those shown in the drawings used in the description of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 12, the positioning result utilization system 1b according to the second embodiment includes a portable terminal 500 that also serves as the vehicle-mounted device 200, the roadside device 300, and the position information utilization device 400 described above. For example, it is the same as the positioning result utilization system 1 of the first embodiment.

<Detailed configuration of portable terminal 500>
The portable terminal 500 communicates with the authentication center 120 and performs the above-described authentication-related processing in the same manner as the on-vehicle device 200 described above. Similarly to the on-vehicle device 200 described above, the mobile terminal 500 uses the navigation messages received from the plurality of GPS satellites 2 to determine the current position of the device itself and calculates the authentication level described above. Furthermore, the mobile terminal 500 executes an application that provides a predetermined service by using the current position obtained by positioning. For example, examples of the application include an application for performing the above road billing process and parking billing process, and a game using position information.

  Examples of the mobile terminal 500 include a multifunction mobile phone such as a smartphone. Instead of the mobile terminal 500, an on-vehicle device such as a navigation device that has a GPS function and performs the above-described authentication-related processing may be used.

  As illustrated in FIG. 13, the mobile terminal 500 includes a communication unit 510, a control unit 520, and a satellite receiver 530. The navigation message broadcast by the QZS satellite 3 is received by the receiving unit 511 provided in the communication unit 510 of the mobile terminal 500.

  The communication unit 510 includes a reception unit 511 and a transmission unit 512, and functions in the same manner as the communication unit 210 of the in-vehicle device 200 described above. The satellite receiver 530 also functions in the same manner as the satellite receiver 230 described above.

The control unit 520 is a computer including a CPU, a ROM, a RAM, and the like, and controls the communication unit 510 and the satellite receiver 530. Further, the CPU executes the program stored in the ROM while using the temporary storage function of the RAM, thereby executing the authentication related process similar to that of the first embodiment and the position information use related process of FIG. Therefore, S1 corresponds to the positioning unit in the claims, S5 corresponds to the authentication information acquisition unit in the claims, and S9 to S11 correspond to the authentication unit in the claims.
<Position information usage related processing>
Here, a process related to the use of the current position measured by the control unit 520 of the portable terminal 500 (hereinafter referred to as a position information use related process) will be described with reference to the flowchart shown in FIG. In the position information use related processing, an authentication level that is the number and ratio of the GPS satellites 2 that have been authenticated out of the GPS satellites 2 used for positioning the current position is calculated, It is determined whether to use for an application that uses a position (hereinafter referred to as a position use application).

  The flow chart of FIG. 14 shows that the position use application is activated and the control unit 520 of the mobile terminal 500 is based on navigation messages included in GPS radio waves received from three or more GPS satellites 2. What is necessary is just to set it as the structure started when the present position is measured.

Note that the authentication-related process similar to that of the first embodiment and the process shown in the flowchart of FIG. 14 are performed in parallel, and even when the authentication in the authentication-related process is not completed for all the navigation messages used for positioning, It is assumed that the flowchart of FIG. 14 starts. First, in step S101, the current position of the own device obtained based on a navigation message included in GPS radio waves received from three or more GPS satellites 2 is acquired. The acquired current position is stored in an electrically rewritable memory such as RAM or EEPROM of the control unit 520. When accumulating the acquired current position in the memory, information on the time when the current position is measured (that is, a time stamp) is linked and accumulated.

  In step S102, in the same manner as in S22 described above, an authentication level that is the ratio of the GPS satellites 2 that can be authenticated at the present time in the authentication-related processing among the GPS satellites 2 used for positioning of the acquired current position is calculated. . This S102 corresponds to an authentication level calculation unit in claims. The authentication level may be the number of GPS satellites 2 that can be authenticated.

  In step S103, the request authentication level requested by the active location use application is specified. As an example, the request authentication level corresponding to the location use application may be specified with reference to a correspondence relationship in which the type of the location use application and the request authentication level are associated in advance. In the process of S103, as in the process of S41 described above, it is assumed that the request authentication level is higher as the reliability of the position information required by the position use application is higher. Note that the processing of S103 may be omitted by specifying in advance when the request authentication level is a fixed value.

  In step S104, similarly to S42 described above, it is determined whether or not the authentication level calculated in S102 has reached the request authentication level specified in S103. If it is determined that the required authentication level has been reached (YES in S104), the process proceeds to step S105, and the position information acquired in S101 is set as the target of the position use application. On the other hand, if it is determined that the required authentication level has not been reached (NO in S104), the process proceeds to step S106, and the position information acquired in S101 is not targeted for the position use application. S104 to S106 correspond to a first usage determination unit in the claims.

  The control unit 520 does not use the position information that is determined not to be the target of the position use application in the position information use related process for the position use application. On the other hand, the position information determined to be the target of the position use application in the position information use related process is used for the position use application. The case where the location use application is the above-described road billing process or parking billing process will be described as an example.

  The location information that is determined not to be subject to the location use application in the location information use related process is not subject to billing even if it falls under the billing region, and is not charged. On the other hand, regarding the location information determined to be the location use application target in the location information use related process, if it falls into the area to be charged, it is charged and charged. The control unit 520 corresponds to a first execution unit in the claims.

<Summary of Embodiment 3>
According to the third embodiment, in the mobile terminal 500, it is determined whether or not to execute the position use application according to the level of the authentication level of the navigation message of the GPS satellite 2 used for positioning the current position. Therefore, billing processing with high reliability of required location information is not executed unless the authentication level is high, whereas a game with low reliability of required location information is executed even when the authentication level is low. It becomes possible to do.

  As a result, in applications and systems that use positioning results based on navigation messages from the GPS satellite 2 used in the satellite positioning system, the positioning results are determined according to the reliability of the positioning results required for the application or system. It can be used flexibly.

Note that the mobile terminal 500 is not limited to a configuration used in a vehicle, and may be configured to be used by being carried by a person or the like. In this case, the location use application may be a game such as orienteering or stamp rally, or a billing process based on the current location for entering a theme park or using an attraction.
<Modification 4>
In the third embodiment, the case where the location use application is a road billing process for charging a toll road is described. However, in the configuration of the third embodiment, the vehicle is actually traveling on a toll road. However, if the authentication level does not reach the required authentication level for road billing processing, there is a problem that billing cannot be performed.

  In order to solve the above problems, it is preferable to adopt the configuration of Modification Example 4 below. Modification 4 is the same as Modification 2 except that the main body that performs processing is the control unit 520 of the mobile terminal 500.

<Road Charging Related Processing in Modification 4>
Here, the road billing related process in the modified example 4 will be described using the flowchart shown in FIG. The flowchart of FIG. 15 shows, for example, a navigation message included in GPS radio waves received from three or more GPS satellites 2 by the control unit 520 of the mobile terminal 500 when an application for road billing related processing is activated. A configuration may be adopted that starts when the current position of the own device is measured based on the above.

  First, in step S121, the current position of the own device obtained based on a navigation message included in GPS radio waves received from three or more GPS satellites 2 is acquired. The acquired current position is associated with a time stamp and stored in the memory.

  The process of steps S122 to S135 is the same as the process of S62 to S75 of the second modification. The difference is that in S126 and S133, it is determined whether or not a new positioning result has been acquired, and in S124, the display device or voice output device (not shown) provided in the terminal is charged later. There is a point to notify the user that there is a possibility. Therefore, S123 and S128 correspond to the first usage determination unit in the claims, S124 corresponds to the first notification processing unit in the claims, S125 corresponds to the first storage processing unit in the claims, and S129 claims. S135 corresponds to the first execution unit of the claims. Note that the process of S124 may be omitted.

According to this, even if the vehicle is actually traveling on a toll road, it is possible to reduce the occurrence of trouble that cannot be charged.
<Modification 5>
In the third embodiment, the case where the location use application is a parking billing process that charges for parking in the pay parking area has been described. However, in the configuration of the third embodiment, the vehicle is actually parked in the pay parking area. Even so, if the authentication level does not reach the required authentication level for the parking billing process, there is a problem that billing cannot be performed.

  In order to solve the above problems, it is preferable to adopt the configuration of Modification 5 below. Modification 5 is the same as Modification 3 except that the main body that performs the processing is the control unit 520 of the mobile terminal 500.

<Parking fee-related processing in Modification 5>
Here, parking charge-related processing in Modification 5 will be described using the flowchart shown in FIG. The flowchart in FIG. 16 shows, for example, a navigation message included in GPS radio waves received from three or more GPS satellites 2 by the control unit 520 of the mobile terminal 500 when a parking billing related process application is activated. A configuration may be adopted that starts when the current position of the own device is measured based on the above.

  First, in step S141, the current position of the own device obtained based on a navigation message included in GPS radio waves received from three or more GPS satellites 2 is acquired. The acquired current position is associated with a time stamp and stored in the memory.

  The processing of steps S142 to S156 is the same as the processing of S82 to S96 of the third modification. The difference is that in S147 and S154, it is determined whether or not a new positioning result has been acquired, and in S145, a display device or voice output device (not shown) provided in the terminal is charged later. There is a point to notify the user that there is a possibility. Therefore, S142 corresponds to the first parking determination unit in the claims, S144 and S149 correspond to the first usage determination unit in the claims, S145 corresponds to the first notification processing unit in the claims, and S146 claims. S150 corresponds to the first continuity determination unit in the claims, and S156 corresponds to the first execution unit in the claims. Note that the process of S145 may be omitted.

  According to this, even if the vehicle is actually parked in the pay parking area, it is possible to reduce the occurrence of problems that cannot be charged.

<Finally>
In the above-described embodiment, an example in which only the navigation message received from the GPS satellite 2 is used for positioning has been described. However, the navigation message received from the QZS satellite 3 may be used for positioning. . In this case, the navigation message received from the QZS satellite 3 may be authenticated in the same manner as the GPS satellite 2.

  As an example, a RAND message is generated from the navigation message received by the monitor station 110 from the QZS satellite 3, and parity data is generated by the authentication center 120 based on this RAND message. Then, the created parity data is sent to the master control station 130, and the parity data is transmitted from the master control station 130 to the QZS satellite 3. The QZS satellite 3 broadcasts a navigation message including the parity data toward the ground.

  The in-vehicle device 200 creates a RAND message from the navigation message received from the QZS satellite 3, and creates comparison parity data from the RAND message and the H matrix acquired from the authentication center 120. Then, a configuration in which authentication is performed by comparing the created comparison parity data with the parity data received from the QZS satellite 3 may be adopted.

  Further, the authentication method described in the above embodiment is merely an example, and a configuration using another authentication method may be used.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.

1, 1a, 1c Positioning result utilization system, 120 authentication center, 200 vehicle-mounted device (device with positioning function), 230 satellite receiver, 300 roadside device (positioning result receiving device), 400 position information utilization device (positioning result receiving device) 500, portable terminal (device with positioning function), S1 positioning unit, S5 authentication information acquisition unit, S9 to S11 authentication unit, S22 authentication level calculation unit, S24 positioning result transmission processing unit, S42, S61, S81 positioning result reception processing S43 to S45, S63, S68, S84, S89 second usage determining unit, S75, S96 second execution unit, S101 authentication level calculating unit, S104 to S106, S123, S128, S144, S149 first usage determining unit, S135, S156 First execution unit

Claims (9)

Used for moving objects,
A satellite receiver (530) for receiving a signal from an artificial satellite used in the satellite positioning system;
A positioning unit (S1) for positioning the position of its own device based on signals received from a plurality of artificial satellites by the satellite receiver;
An authentication information acquisition unit (S5) for acquiring authentication information necessary for authenticating that the signal is a legitimate signal from the artificial satellite from an authentication center provided outside the device;
An authentication unit (S9, S10, S11) that performs authentication using the authentication information acquired by the authentication information acquisition unit that the signal received by the satellite receiver is a normal signal from the artificial satellite; A device with positioning function (500) comprising:
An authentication level calculation unit (S102) that calculates an authentication level based on at least one of the number and ratio of artificial satellites that can be authenticated by the authentication unit among the artificial satellites used for positioning by the positioning unit;
A first execution unit (S135, S156) that executes a positioning result use process that is a process using a positioning result measured by the positioning unit;
A first usage determining unit (S104, S105, S106, S123, which determines whether or not to use the positioning result measured by the positioning unit for the positioning result use processing according to the authentication level calculated by the authentication level calculating unit. S128, S144, S149) ,
If the conditions for starting the positioning result use process are satisfied and the authentication level calculated by the authentication level calculation unit is lower than the authentication level required by the positioning result use process, the positioning is performed. A first storage processing unit (S125, S146) for sequentially storing the positioning results from a point in time when a condition for starting a result use process is satisfied;
When the authentication level calculated by the authentication level calculation unit reaches the authentication level requested by the positioning result use process, the point in time when the authentication level reaches the authentication level requested by the positioning result use process A first continuity determining unit (S129, S150) for determining whether there is continuity between the positioning result and the past positioning result sequentially stored in the first storage processing unit ;
When the first execution unit determines that there is continuity in the first continuity determination unit, the past positioning results sequentially stored in the first storage processing unit are also used for the positioning result use processing positioning function with a device according to claim that you and. In claim 1 ,
The first use determination unit, as the reliability of the positioning result required in the positioning result use process executed by the first execution unit is higher, the positioning result measured by the positioning unit is used as the positioning result use process. A device with a positioning function, characterized in that the authentication level determined to be used for the device is high. In claim 1 or 2 ,
Used for a vehicle as the moving body,
A first parking determination unit (S142) for determining whether the vehicle is parked;
Even when it is determined that there is parking in the first parking determination unit, if the authentication level calculated by the authentication level calculation unit is lower than the authentication level requested by the positioning result use process, the authentication unit Continue to authenticate,
The first storage processing unit
The first parking determination unit determines that there is parking, satisfies the conditions for starting the positioning result use process, and the authentication level calculated by the authentication level calculation unit is the positioning result use process. If the level is less than the required authentication level, the positioning results from the point in time when the conditions for starting the positioning result use processing are satisfied are sequentially stored,
The first continuity determination unit
When the authentication level calculated by the authentication level calculation unit reaches the authentication level requested by the positioning result use process, the point in time when the authentication level reaches the authentication level requested by the positioning result use process A positioning function that determines whether or not there is continuity based on whether or not a deviation between a positioning result and a past positioning result stored in the first storage processing unit is less than a predetermined value. Equipment. In any one of Claims 1-3 ,
The positioning result using process is a charging process for charging when the moving object is located in a predetermined area,
The first execution unit
When the condition for starting the charging process is satisfied and the authentication level calculated by the authentication level calculation unit is less than the authentication level required by the charging process, the authentication level is the positioning While the billing process is not performed until the authentication level requested by the result use process is reached,
When the authentication level has reached the authentication level requested by the positioning result use process and the first continuity determination unit determines that the continuity exists, the first storage process The past positioning results sequentially stored in the unit are also used for the billing process,
If the condition for starting the charging process is satisfied and the authentication level calculated by the authentication level calculation unit is less than the authentication level requested by the charging process, it may be charged later A device with a positioning function, comprising a first notification processing unit (S124, S145) for notifying the user that there is a possibility. Positioning results transmitted from the device with positioning function (200) for authenticating that the signals received by the satellite receiver (230) from a plurality of artificial satellites used in the satellite positioning system are legitimate signals from the artificial satellites. A positioning result receiving device (300, 400) comprising positioning result receiving processing units (S42, S61, S81) for receiving
The positioning result reception processing unit is a positioning provided with an authentication level based on at least one of the number and ratio of the artificial satellites that have been authenticated among the artificial satellites used for positioning by the device with a positioning function. To receive the results,
A second execution unit (S75, S96) that executes a positioning result use process that is a process of using the positioning result received by the positioning result reception processing unit;
A second usage determination unit (S43, S44, S44, S44) that determines whether to use the positioning result for the positioning result use processing according to the authentication level given to the positioning result received by the positioning result reception processing unit. S45, S63, S68, S84, S89) ,
The positioning result reception processing unit receives the positioning result to which the authentication level is given from the device with a positioning function used for a moving body,
When the condition for starting the positioning result use process is satisfied and the authentication level received by the positioning result reception processing unit is lower than the authentication level requested by the positioning result use process, A second storage processing unit (S65, S86) for sequentially storing the positioning results from the point in time when the conditions for starting the positioning result use processing are satisfied;
When the authentication level received by the positioning result reception processing unit reaches the authentication level requested by the positioning result use processing, the positioning result to which the authentication level has been assigned and the second storage processing unit A second continuity determination unit (S70, S91) for determining whether or not there is continuity with the past positioning results stored sequentially;
If the second execution unit determines that there is continuity in the second continuity determination unit, the past positioning results sequentially stored in the second storage processing unit are also used for the positioning result use processing positioning result receiving apparatus characterized that you and. In claim 5 ,
The second use determination unit is configured to obtain the positioning result received by the positioning result reception processing unit as the reliability of the positioning result required in the positioning result use process executed by the second execution unit increases. The positioning result receiving apparatus characterized in that the authentication level determined to be used for result use processing is high. In claim 5 or 6 ,
The positioning result reception processing unit receives the positioning result to which the authentication level is given from the device with a positioning function used for a moving body,
A second parking determination unit (S82) for determining whether or not the mobile object is parked;
The second storage processing unit
The second parking determination unit determines that there is parking, satisfies the conditions for starting the positioning result use processing, and the authentication level received by the positioning result reception processing unit is the positioning result use If it is less than the authentication level required for processing, the positioning results from the point in time when the conditions for starting the positioning result use processing are satisfied are sequentially stored,
The second continuity determination unit
When the authentication level received by the positioning result reception processing unit reaches the authentication level requested by the positioning result use processing, the positioning result to which the authentication level has been assigned and the second storage processing unit A positioning result receiving apparatus that determines whether or not there is the continuity based on whether or not a deviation from a stored past positioning result is less than a predetermined value. In any one of Claims 5-7 ,
The positioning result using process is a charging process for charging when the moving object is located in a predetermined area,
The second execution unit is
When the condition for starting the charging process is satisfied and the authentication level received by the positioning result reception processing unit is lower than the authentication level requested by the charging process, the authentication level is While the billing process is not performed until the authentication level requested by the positioning result use process is reached,
When the authentication level has reached the authentication level requested by the positioning result use process, and the second continuity determination unit determines that the continuity exists, the second storage process The past positioning results sequentially stored in the unit are also used for the billing process,
If the condition for starting the charging process is satisfied and the authentication level received by the positioning result reception processing unit is lower than the authentication level requested by the charging process, the charge will be charged later A positioning result receiving apparatus comprising a second notification processing unit (S64, S85) for notifying a user that there is a possibility. A satellite receiver (230) for receiving a signal from an artificial satellite used in the satellite positioning system;
A positioning unit (S1) for positioning the position of its own device based on signals received from a plurality of artificial satellites by the satellite receiver;
An authentication information acquisition unit (S5) for acquiring authentication information necessary for authenticating that the signal is a legitimate signal from the artificial satellite from an authentication center provided outside the device;
An authentication unit (S9, S10, S11) that performs authentication using the authentication information acquired by the authentication information acquisition unit that the signal received by the satellite receiver is a normal signal from the artificial satellite; ,
An authentication level calculation unit (S22) that calculates an authentication level based on at least one of the number and ratio of the artificial satellites that can be authenticated by the authentication unit among the artificial satellites used for positioning by the positioning unit;
A positioning result transmission processing unit (S24) for transmitting a positioning result measured by the positioning unit to a device other than its own device;
When the positioning result transmission processing unit transmits the positioning result, the positioning function-equipped device (200) which also transmits the authentication level calculated by the authentication level calculating unit (200),
A positioning result reception processing unit (S42, S61, S81) for receiving a positioning result to which the authentication level is given, transmitted from the positioning function device (200);
A second execution unit (S75, S96) that executes positioning result use processing that uses the positioning result received by the positioning result reception processing unit;
A second usage determination unit (S43, S44, S44, S44) that determines whether to use the positioning result for the positioning result use processing according to the authentication level given to the positioning result received by the positioning result reception processing unit. S45, S63, S68, S84, S89) a positioning result receiving apparatus comprising a (300, 400) seen including,
The positioning result reception processing unit receives the positioning result to which the authentication level is given from the device with a positioning function used for a moving body,
When the condition for starting the positioning result use process is satisfied and the authentication level received by the positioning result reception processing unit is lower than the authentication level requested by the positioning result use process, A second storage processing unit (S65, S86) for sequentially storing the positioning results from the point in time when the conditions for starting the positioning result use processing are satisfied;
When the authentication level received by the positioning result reception processing unit reaches the authentication level requested by the positioning result use processing, the positioning result to which the authentication level has been assigned and the second storage processing unit A second continuity determination unit (S70, S91) for determining whether or not there is continuity with the past positioning results stored sequentially;
If the second execution unit determines that there is continuity in the second continuity determination unit, the past positioning results sequentially stored in the second storage processing unit are also used for the positioning result use processing positioning results utilization system, characterized in that a.

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