Wireless communication system, wireless communication device, and program

Abstract

To clearly determine the transmission source of a radio signal.SOLUTION: A radio communication system includes a first radio communication device that transmits and receives radio signals in accordance with a prescribed communication standard, and at least one second radio communication device. The first radio communication device and the second radio communication device perform, multiple times, a prescribed process based on transmission and reception of the radio signals and perform at least either transmission or reception of the radio signals containing different secure information for each prescribed process.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a wireless communication system, a wireless communication device, and a program. [Background technology]

[0002] In recent years, a technology has been developed that estimates the positional relationship between devices based on wireless signals transmitted and received between the devices. For example, Patent Document 1 discloses a technology that estimates the distance between an in-vehicle device and a portable device based on wireless signals transmitted and received between the in-vehicle device and the portable device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] U.S. Patent No. 9,566,945 Summary of the Invention [Problem to be solved by the invention]

[0004] Here, for example, if the wireless signals transmitted from each of the vehicle-mounted units installed in different moving bodies do not contain information that can identify the source of the transmission, a situation may arise in which it is not possible to determine which vehicle-mounted unit transmitted the wireless signal received by the portable unit.

[0005] Therefore, the present invention has been made in consideration of the above problems, and an object of the present invention is to clearly determine the source of a wireless signal. [Means for solving the problem]

[0006] In order to solve the above problem, according to one aspect of the present invention, a wireless communication system is provided, comprising a first wireless communication device and at least one second wireless communication device that transmit and receive wireless signals conforming to a specified communication standard, wherein the first wireless communication device and the second wireless communication device perform specified processing based on the transmission and reception of the wireless signals multiple times, and for each specified processing, at least one of transmitting or receiving the wireless signals containing different secure information is performed.

[0007] In addition, in order to solve the above problem, according to another aspect of the present invention, a wireless communication device is provided, comprising a wireless communication unit that transmits and receives wireless signals conforming to a specified communication standard between other communication devices, and a control unit that controls the transmission and reception of the wireless signals by the wireless communication unit, wherein the control unit causes the wireless communication unit to transmit the wireless signals including different secure information for each specified process based on the transmission and reception of the wireless signals.

[0008] In addition, in order to solve the above problem, according to another aspect of the present invention, a wireless communication device is provided, comprising a wireless communication unit that transmits and receives wireless signals conforming to a specified communication standard between other communication devices, and a control unit that controls the transmission and reception of the wireless signals by the wireless communication unit, wherein, when secure information included in the wireless communication received by the wireless communication unit is recognized to be regular secure information predetermined for each specified processing based on the transmission and reception of the wireless signals, the control unit causes the wireless communication unit to return the wireless signal including the secure information corresponding to the corresponding specified processing.

[0009] In addition, in order to solve the above problem, according to another aspect of the present invention, a program is provided that causes a computer to realize a control function that controls the transmission and reception of a wireless signal that complies with a specified communication standard, and causes the control function to control the transmission of the wireless signal containing different secure information for each specified process based on the transmission and reception of the wireless signal.

[0010] In addition, in order to solve the above problem, according to another aspect of the present invention, a program is provided that causes a computer to realize a control function for controlling the transmission and reception of a wireless signal conforming to a specified communication standard, and causes the control function to control the wireless signal so that, when secure information contained in the received wireless signal is recognized to be genuine secure information predetermined for each specified processing based on the transmission and reception of the wireless signal, the wireless signal containing the secure information corresponding to the corresponding specified processing is returned. Effect of the Invention

[0011] As described above, according to the present invention, it is possible to clearly determine the source of a wireless signal. [Brief description of the drawings]

[0012] [Figure 1] 1 is a block diagram showing an example of the configuration of a wireless communication system 1 according to an embodiment of the present invention. [Diagram 2] 10 is a sequence diagram showing an example of a processing flow by the wireless communication system 1 according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals, and duplicated explanations will be omitted.

[0014] <1.1. Embodiment> <<1.1. System configuration example>> First, a configuration example of a wireless communication system 1 according to an embodiment of the present invention will be described.

[0015] FIG. 1 is a block diagram showing an example of the configuration of a wireless communication system 1 according to this embodiment.

[0016] A wireless communication system 1 according to this embodiment includes a first wireless communication device and at least one second wireless communication device that transmit and receive wireless signals in compliance with a prescribed communication standard.

[0017] The portable device 10 shown in Fig. 1 is an example of the first wireless communication device, and the vehicle-mounted device 20 shown in Fig. 1 is an example of the second wireless communication device.

[0018] (Portable device 10) The portable device 10 according to this embodiment is a wireless communication device carried by a user.

[0019] The portable device 10 may be, for example, a smartphone, a tablet, a wearable device, or a dedicated device manufactured specifically for use in the wireless communication system 1.

[0020] As shown in FIG. 1, a portable device 10 according to the present embodiment may include a wireless communication unit 110, a control unit 120, and a storage unit .

[0021] (Wireless communication unit 110) The wireless communication unit 110 according to this embodiment, under the control of the control unit 120, transmits and receives wireless signals that comply with a prescribed communication standard between at least one vehicle-mounted device 20.

[0022] An example of the prescribed communication standard according to this embodiment is, for example, ultra wide band (UWB) wireless communication.

[0023] On the other hand, the prescribed communication standard in this embodiment is not limited to the above example, and any communication standard capable of estimating the positional relationship between devices based on wireless signals transmitted and received between the devices may be adopted.

[0024] Other examples of the prescribed communication standard according to the present embodiment include Wi-Fi (registered trademark) and BLE (Bluetooth (registered trademark) Low Energy).

[0025] (Control unit 120) The control unit 120 according to this embodiment controls the transmission and reception of radio signals by the radio communication unit 110, and controls prescribed processing based on the transmission and reception of the radio signals.

[0026] The specified processing in this embodiment may be processing that at least includes one of the wireless communication unit 110 of the portable device 10 or the wireless communication unit 210 of the vehicle-mounted device 20 transmitting a request for the specified processing, and the other of the wireless communication unit 110 of the portable device 10 or the wireless communication unit 210 of the vehicle-mounted device 20 transmitting a response to the above request received.

[0027] An example of the specified processing according to this embodiment is a process of estimating the positional relationship between the portable device 10 and the vehicle-mounted device 20 (more precisely, between the wireless communication unit 110 of the portable device 10 and the wireless communication unit 210 of the vehicle-mounted device 20) based on the wireless signals transmitted and received.

[0028] The positional relationship between the portable device 10 and the vehicle-mounted device 20 includes the distance and angle between the portable device 10 and the vehicle-mounted device 20.

[0029] As an example, the specified process according to the present embodiment may be a process of calculating a distance measurement value that is an estimated value of the distance between the portable device 10 and the vehicle-mounted device 20 (distance measurement).

[0030] As another example, the specified process according to the embodiment may be a process of calculating an angle of the portable device 10 with respect to the vehicle-mounted device 20 (angle estimation).

[0031] The control unit 120 according to this embodiment cooperates with the control unit 220 of the vehicle-mounted device 20 to perform control so that the above-mentioned prescribed process is executed multiple times.

[0032] At this time, one of the features of the control unit 120 according to the present embodiment is that it performs control so that a wireless signal including different secure information is transmitted or received for each prescribed process.

[0033] The secure information according to the present embodiment may be various information used to identify the source of the wireless signal. Examples of the secure information include an identifier of the portable device 10 or the vehicle-mounted device 20, a random number used in a hash calculation, and various types of key information.

[0034] For example, the control unit 120 according to this embodiment may cause the wireless communication unit 110 to transmit a wireless signal including different secure information for each specified process.

[0035] Also, for example, when the control unit 120 of this embodiment recognizes that the secure information contained in the wireless signal received by the wireless communication unit 110 is genuine secure information predetermined for each specified processing, the control unit 120 may return a wireless signal containing the secure information corresponding to the corresponding specified processing to the wireless communication unit 110.

[0036] According to the above-described control, it is possible to clearly determine which specified processing has been performed on the wireless signal received by the wireless communication unit 110 and transmitted from a preset communication partner, and it is possible to more securely perform subsequent processing (e.g., control of a moving body based on the positional relationship between the portable device 10 and the vehicle-mounted device 20).

[0037] The secure information according to this embodiment may be different for each moving body in which the vehicle-mounted device 20 is mounted.

[0038] According to this, the control unit 120 of the portable device 10 can determine, based on the secure information contained in the wireless signal received by the wireless communication unit 110, whether or not the vehicle-mounted device 20 (the mobile body in which the vehicle-mounted device is mounted) that transmitted the wireless signal is a predetermined legitimate communication partner.

[0039] Moreover, the secure information according to this embodiment may be different for each vehicle-mounted device 20 mounted on the same moving body.

[0040] According to this, the control unit 120 of the portable device 10 can determine, based on the secure information contained in the wireless signal received by the wireless communication unit 110, whether the vehicle-mounted device 20 that transmitted the wireless signal is one of the multiple vehicle-mounted devices 20 mounted on the mobile body, thereby making it possible to realize more accurate specified processing.

[0041] The functions of the control unit 120 according to this embodiment are realized by various processors.

[0042] (Storage unit 130) The storage unit 130 according to the present embodiment stores various types of information used by each component included in the portable device 10.

[0043] For example, the storage unit 130 according to this embodiment stores a program used by the control unit 120.

[0044] Moreover, the storage unit 130 according to this embodiment stores secure information corresponding to a predetermined communication partner and a communication sequence.

[0045] (Onboard device 20) The vehicle-mounted device 20 according to this embodiment is a wireless communication device mounted on a moving object such as a vehicle.

[0046] At least one vehicle-mounted device 20 is mounted on a moving object.

[0047] As shown in FIG. 1, the vehicle-mounted device 20 according to this embodiment may include a wireless communication unit 210, a control unit 220, and a storage unit 230.

[0048] (Wireless communication unit 210) The wireless communication unit 210 according to this embodiment, under the control of the control unit 220, transmits and receives wireless signals to and from the portable device 10 in accordance with a prescribed communication standard.

[0049] (Control unit 220) The control unit 220 according to this embodiment controls the transmission and reception of radio signals by the radio communication unit 210, and controls prescribed processing based on the transmission and reception of the radio signals.

[0050] For example, the control unit 220 according to this embodiment may cause the wireless communication unit 210 to transmit a wireless signal including different secure information for each specified process.

[0051] Also, for example, when the control unit 220 of this embodiment recognizes that the secure information contained in the wireless signal received by the wireless communication unit 210 is genuine secure information predetermined for each specified processing, the control unit 220 may cause the wireless communication unit 210 to return a wireless signal containing the secure information corresponding to the corresponding specified processing.

[0052] According to the above-described control, it is possible to clearly determine which specified processing has been performed on the wireless signal received by the wireless communication unit 210 and transmitted from a preset communication partner, and it is possible to more securely perform subsequent processing (e.g., control of a moving body based on the positional relationship between the portable device 10 and the vehicle-mounted device 20).

[0053] When a plurality of vehicle-mounted devices 20 are mounted on a moving body, each of the control units 220 of the vehicle-mounted devices 20 may perform control so as to transmit and receive radio signals including mutually different secure information.

[0054] According to this, the control unit 120 of the portable device 10 can determine, based on the secure information contained in the wireless signal received by the wireless communication unit 110, whether the vehicle-mounted device 20 that transmitted the wireless signal is one of the multiple vehicle-mounted devices 20 mounted on the mobile body, thereby making it possible to realize more accurate specified processing.

[0055] The functions of the control unit 220 according to this embodiment are realized by various processors.

[0056] (Storage unit 230) The storage unit 230 according to this embodiment stores various types of information used by each component of the vehicle-mounted device 20.

[0057] For example, the storage unit 230 according to this embodiment stores a program used by the control unit 220.

[0058] Moreover, the storage unit 230 according to this embodiment stores secure information corresponding to a predetermined communication partner and a communication sequence.

[0059] The configuration example of the wireless communication system 1 according to the present embodiment has been described above. Note that the above configuration described with reference to Fig. 1 is merely an example, and the configuration of the wireless communication system 1 according to the present embodiment is not limited to this example.

[0060] For example, the wireless communication system 1 according to this embodiment may further include a control device that controls the mobile body in which the vehicle-mounted device 20 is mounted based on the result of the above-mentioned specified processing and the result of an authentication processing that is executed separately from the specified processing.

[0061] The control of the moving body includes, for example, control related to unlocking doors and starting an engine of the moving body.

[0062] In this case, the control device may permit the doors to be unlocked and the engine to be started if the authenticity of the portable device 10 is confirmed by the authentication process and the positional relationship between the portable device 10 and the vehicle-mounted device 20 is confirmed to be within a specified range.

[0063] The authentication process may be based on the transmission and reception of radio signals conforming to a communication standard different from the prescribed communication standard used in the prescribed process.

[0064] For the authentication process, for example, a radio signal in the LF (Low Frequency) band or the UHF (Ultra High Frequency) band may be used.

[0065] <<1.2. Processing Details>> Next, the processing performed by the wireless communication system 1 according to the present embodiment will be described in detail with specific examples.

[0066] As described above, one of the features of the portable device 10 and the vehicle-mounted device 20 according to this embodiment is that they execute a specified process based on the transmission and reception of wireless signals multiple times, and at least one of transmitting and receiving wireless signals containing different secure information for each specified process.

[0067] According to the above-described control, it is possible to determine whether the sender of a received wireless signal is a preset communication partner, thereby enabling more accurate and secure standard processing to be realized.

[0068] Furthermore, the portable device 10 and the vehicle-mounted device 20 according to the present embodiment may at least either transmit or receive the wireless signals including mutually different secure information in the prescribed process.

[0069] In this case, even if multiple wireless signals are received from the same device in a single specified process, the type of the received wireless signal can be identified, making it possible to realize accurate and secure specified processing in accordance with a predetermined sequence.

[0070] It should be noted that which of the portable device 10 and the vehicle-mounted device 20 transmits the request and which transmits the response can be flexibly determined depending on a prescribed process and a sequence in the prescribed process.

[0071] In the following, it is assumed that the specified process according to the present embodiment is distance measurement that calculates a distance measurement value that is an estimate of the distance between the portable device 10 and the vehicle-mounted device 20.

[0072] In addition, the following examples show cases in which distance measurement is performed based on a distance measurement trigger transmitted by the portable device 10, a distance measurement request transmitted by the vehicle-mounted device 20 based on the distance measurement trigger received, and a distance measurement response transmitted by the portable device 10 in response to the distance measurement request received.

[0073] FIG. 2 is a sequence diagram showing an example of a processing flow by the wireless communication system 1 according to the present embodiment.

[0074] 2 illustrates an example in which the wireless communication system 1 includes a portable device 10 and two vehicle-mounted devices 20a and 20b. The vehicle-mounted devices 20a and 20b are both mounted on the same moving object.

[0075] In the example shown in FIG. 2, first, wireless communication unit 110 of portable device 10 transmits a distance measurement trigger including predetermined secure information 1A and a distance measurement trigger including secure information 1B under the control of control unit 120 (S102 and S104).

[0076] Next, the control unit 220a of the vehicle-mounted device 20a determines whether the secure information included in the distance measurement trigger received by the wireless communication unit 210a in step S102 is genuine secure information 1A corresponding to the first distance measurement trigger transmitted from the portable device 10 that has been previously set as a genuine communication partner.

[0077] Here, if it is determined that the secure information included in the distance measurement trigger is genuine secure information 1A, the control unit 220a of the vehicle-mounted device 20a causes the wireless communication unit 210a to transmit a distance measurement request including predetermined secure information 1C (S106).

[0078] Next, the control unit 120 of the portable device 10 determines whether the secure information included in the distance measurement request received by the wireless communication unit 110 in step S106 is genuine secure information 1C corresponding to the first distance measurement request transmitted from the vehicle-mounted device 20a that has been previously set as a genuine communication partner.

[0079] If it is determined that the secure information included in the distance measurement request is genuine secure information 1C, the control unit 120 of the portable device 10 causes the wireless communication unit 110 to transmit a distance measurement response including predetermined secure information 1D (S108).

[0080] Next, the control unit 220a of the vehicle-mounted device 20a determines whether the secure information included in the distance measurement response received by the wireless communication unit 210a in step S108 is genuine secure information 1D corresponding to the first distance measurement response transmitted from the portable device 10 that has been previously set as a genuine communication partner.

[0081] Here, if it is determined that the secure information included in the distance measurement response is genuine secure information 1D, the control unit 220a of the vehicle-mounted device 20a calculates a distance measurement value (not shown) based on the distance measurement request and distance measurement response transmitted and received in steps S106 and S108.

[0082] Meanwhile, the control unit 220b of the vehicle-mounted device 20b determines whether the secure information included in the ranging trigger received by the wireless communication unit 210b in step S104 is genuine secure information 1B corresponding to the first ranging trigger transmitted from the portable device 10 that has been previously set as a genuine communication partner.

[0083] Here, if it is determined that the secure information included in the distance measurement trigger is genuine secure information 1B, the control unit 220b of the vehicle-mounted device 20b causes the wireless communication unit 210b to transmit a distance measurement request including predetermined secure information 1E (S110).

[0084] Next, the control unit 120 of the portable device 10 determines whether the secure information included in the distance measurement request received by the wireless communication unit 110 in step S110 is genuine secure information 1E corresponding to the first distance measurement request transmitted from the vehicle-mounted device 20b that has been previously set as a genuine communication partner.

[0085] Here, if it is determined that the secure information included in the distance measurement request is genuine secure information 1E, the control unit 120 of the portable device 10 causes the wireless communication unit 110 to transmit a distance measurement response including predetermined secure information 1F (S112).

[0086] Next, the control unit 220b of the vehicle-mounted device 20b determines whether the secure information included in the distance measurement response received by the wireless communication unit 210b in step S112 is genuine secure information 1F corresponding to the first distance measurement response transmitted from the portable device 10 that has been previously set as a genuine communication partner.

[0087] Here, if it is determined that the secure information included in the distance measurement response is genuine secure information 1F, the control unit 220b of the vehicle-mounted device 20b calculates a distance measurement value (not shown) based on the distance measurement request and distance measurement response transmitted and received in steps S110 and S112.

[0088] Next, wireless communication section 110 of portable device 10 transmits a distance measurement trigger including predetermined secure information 2A and a distance measurement trigger including secure information 2B under the control of control section 120 (S202 and S204).

[0089] Next, the control unit 220a of the vehicle-mounted device 20a determines whether the secure information included in the ranging trigger received by the wireless communication unit 210a in step S202 is genuine secure information 2A corresponding to the second ranging trigger transmitted from the portable device 10 that has been previously set as a genuine communication partner.

[0090] Here, if it is determined that the secure information included in the distance measurement trigger is genuine secure information 2A, the control unit 220a of the vehicle-mounted device 20a causes the wireless communication unit 210a to transmit a distance measurement request including predetermined secure information 2C (S206).

[0091] Next, the control unit 120 of the portable device 10 determines whether the secure information included in the distance measurement request received by the wireless communication unit 110 in step S206 is genuine secure information 2C corresponding to the second distance measurement request transmitted from the vehicle-mounted device 20a that has been previously set as a genuine communication partner.

[0092] Here, if it is determined that the secure information included in the distance measurement request is genuine secure information 2C, the control unit 120 of the portable device 10 causes the wireless communication unit 110 to transmit a distance measurement response including predetermined secure information 2D (S208).

[0093] Next, the control unit 220a of the vehicle-mounted device 20a determines whether the secure information included in the distance measurement response received by the wireless communication unit 210a in step S208 is genuine secure information 2D corresponding to the second distance measurement response transmitted from the portable device 10 that has been previously set as a genuine communication partner.

[0094] Here, if it is determined that the secure information included in the distance measurement response is genuine secure information 2D, the control unit 220a of the vehicle-mounted device 20a calculates a distance measurement value (not shown) based on the distance measurement request and distance measurement response transmitted and received in steps S206 and S208.

[0095] Meanwhile, the control unit 220b of the vehicle-mounted device 20b determines whether the secure information included in the ranging trigger received by the wireless communication unit 210b in step S204 is genuine secure information 2B corresponding to the second ranging trigger transmitted from the portable device 10 that has been previously set as a genuine communication partner.

[0096] Here, if it is determined that the secure information included in the distance measurement trigger is genuine secure information 2B, the control unit 220b of the vehicle-mounted device 20b causes the wireless communication unit 210b to transmit a distance measurement request including predetermined secure information 2E (S210).

[0097] Next, the control unit 120 of the portable device 10 determines whether the secure information included in the distance measurement request received by the wireless communication unit 110 in step S210 is genuine secure information 2E corresponding to the second distance measurement request transmitted from the vehicle-mounted device 20b, which has been previously set as a genuine communication partner.

[0098] Here, if it is determined that the secure information included in the distance measurement request is genuine secure information 2E, the control unit 120 of the portable device 10 causes the wireless communication unit 110 to transmit a distance measurement response including predetermined secure information 2F (S212).

[0099] Next, the control unit 220b of the vehicle-mounted device 20b determines whether the secure information included in the ranging response received by the wireless communication unit 210b in step S212 is genuine secure information 2F corresponding to the second ranging response transmitted from the portable device 10 that has been previously set as a genuine communication partner.

[0100] If it is determined that the secure information included in the distance measurement response is the regular secure information 2F, the control unit 220b of the vehicle-mounted device 20b calculates a distance measurement value (not shown) based on the distance measurement request and distance measurement response transmitted and received in steps S210 and S212.

[0101] The flow of processing by the wireless communication system 1 according to the present embodiment has been described in detail above with reference to an example.

[0102] Although FIG. 2 illustrates an example in which the portable device 10 transmits the distance measurement trigger, the vehicle-mounted device 20 may transmit the distance measurement trigger.

[0103] In this case, the portable device 10 transmits a distance measurement request, and the vehicle-mounted device 20 transmits a distance measurement response.

[0104] On the other hand, the distance measurement according to this embodiment does not necessarily have to include a distance measurement trigger.

[0105] For example, ranging in this embodiment may be realized by a first ranging signal transmitted from one side, a second ranging signal transmitted from the other side in response to the first ranging signal, and a third ranging signal transmitted from one side in response to the second ranging signal.

[0106] In this case, it is also possible to calculate a distance measurement value based on the first distance measurement signal and the second distance measurement signal, and a distance measurement value based on the second distance measurement signal and the third distance measurement signal.

[0107] <2. Supplementary Information> Although the preferred embodiment of the present invention has been described in detail above with reference to the accompanying drawings, the present invention is not limited to such an example. It is clear that a person having ordinary knowledge in the technical field to which the present invention pertains can conceive of various modified or altered examples within the scope of the technical ideas described in the claims, and it is understood that these also naturally belong to the technical scope of the present invention.

[0108] Furthermore, the series of processes performed by each device described in this specification may be realized using any of software, hardware, and a combination of software and hardware. The programs constituting the software are stored in advance, for example, in a recording medium (non-transitory medium) provided inside or outside each device. Then, each program is loaded into a RAM when executed by a computer, for example, and executed by a processor such as a CPU. The recording medium is, for example, a magnetic disk, an optical disk, a magneto-optical disk, a flash memory, etc. Furthermore, the computer programs may be distributed, for example, via a network, without using a recording medium. [Explanation of symbols]

[0109] 1: wireless communication system, 10: portable device, 110: wireless communication unit, 120: control unit, 130: storage unit, 20: vehicle-mounted device, 210: wireless communication unit, 220: control unit, 230: storage unit

Claims

1. A first wireless communication device and at least one second wireless communication device that transmit and receive wireless signals conforming to a prescribed communication standard, the first wireless communication device and the second wireless communication device perform distance measurement based on transmission and reception of the wireless signal a plurality of times; Each of the wireless signals transmitted and received in the distance measurement performed multiple times includes different secure information; each of the mutually different secure information includes information indicating the number of times the distance measurement has been performed; Wireless communication system.

2. A plurality of the second wireless communication devices are provided, each of the plurality of second wireless communication devices transmits and receives the wireless signal including different secure information; 2. The wireless communication system according to claim 1.

3. the first wireless communication device is carried by a user; The second wireless communication device is mounted on a moving object. A wireless communication system according to claim 1 or 2.

4. The prescribed communication standard includes ultra-wideband wireless communication, A wireless communication system according to any one of claims 1 to 3.

5. a wireless communication unit for transmitting and receiving wireless signals in accordance with a prescribed communication standard with other communication devices; a control unit that controls transmission and reception of the wireless signal by the wireless communication unit; Equipped with the control unit controls execution of distance measurement based on transmission and reception of the wireless signal multiple times, and causes the wireless communication unit to transmit the wireless signal including different secure information in the distance measurement that is executed multiple times; the wireless signals received by the wireless communication unit in the distance measurements performed a plurality of times each include different secure information; each of the mutually different secure information includes information indicating the number of times the distance measurement has been performed; Wireless communication device.

6. a wireless communication unit for transmitting and receiving wireless signals in accordance with a prescribed communication standard with other communication devices; a control unit that controls transmission and reception of the wireless signal by the wireless communication unit; Equipped with the control unit controls execution of multiple distance measurement based on transmission and reception of the wireless signal, and when secure information included in the wireless signal received by the wireless communication unit is recognized as regular secure information predetermined for each number of times the distance measurement is performed, causes the wireless communication unit to transmit back the wireless signal including the secure information corresponding to the corresponding number of times the distance measurement is performed. Wireless communication device.

7. On the computer, A control function for controlling the transmission and reception of wireless signals by the wireless communication unit in accordance with a prescribed communication standard; Realize this, causing the control function to control the execution of distance measurement based on transmission and reception of the wireless signal multiple times, and controlling the wireless communication unit to transmit the wireless signal including different secure information in the distance measurement performed multiple times; the wireless signals received by the wireless communication unit in the distance measurements performed a plurality of times each include different secure information; each of the mutually different secure information includes information indicating the number of times the distance measurement has been performed; program.

8. On the computer, A control function for controlling the transmission and reception of radio signals that comply with prescribed communication standards; Realize this, causing the control function to control the execution of multiple distance measurements based on the transmission and reception of the wireless signal, and when secure information included in the received wireless signal is recognized as regular secure information predetermined for each number of times the distance measurements are performed, causing the control function to control the wireless signal including the secure information corresponding to the corresponding number of times the distance measurements are performed to be returned; program.

Images