Communication device, electronic device, communication device control method, electronic device control method, and program

Abstract

To provide a communication device that can control a radio-related set value to a value suitable for a situation.SOLUTION: An imaging apparatus 101 determines a relative position of an instrument to be detected 102 with respect to the imaging apparatus 101 based on a radio wave transmitted from the instrument to be detected 102. The imaging apparatus 101 sets a radio-related set value corresponding to the relative position of the instrument to be detected 102, and transmits the set radio-related set value to the instrument to be detected 102. The instrument to be detected 102 sets the radio-related set value received from the imaging apparatus 101, and transmits a radio wave based on the set radio-related set value.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a communication device, an electronic device, a control method for a communication device, a control method for an electronic device, and a program. [Background technology]

[0002] A communication device that communicates with an electronic device is known. The communication device detects the location of the electronic device based on radio waves transmitted from the electronic device (see, for example, Patent Document 1). The electronic device transmits radio waves based on preset settings related to the radio waves (hereinafter referred to as "radio wave-related settings"). The radio wave-related settings include the radio wave strength of the radio waves transmitted from the electronic device and the communication interval of the radio waves. For example, setting a relatively strong radio wave strength and a relatively short communication interval improves the accuracy of location detection using radio waves. This allows the communication device to accurately detect the location of the electronic device even if the electronic device is located some distance away from the communication device. Furthermore, setting a weak radio wave strength and a long communication interval within a range where the location can be detected reduces the power consumption required for location detection using radio waves. This allows, for example, when the communication device and the electronic device are battery-powered mobile devices, to detect the location of the electronic device with a certain degree of accuracy while suppressing battery consumption of the mobile device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-9205 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional technology, the radio wave-related setting values ​​that were initially set are used as they are, and therefore it is not possible to control the radio wave-related setting values ​​to values ​​that are appropriate for the situation.

[0005] An object of the present invention is to provide a communication device, an electronic device, a control method for a communication device, a control method for an electronic device, and a program that can control radio wave-related setting values ​​to values ​​appropriate for the situation. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the communication device of the present invention is a communication device that receives radio waves transmitted from an electronic device based on a predetermined radio wave-related setting value, and is characterized by comprising a discrimination means that discriminates the relative position of the electronic device with respect to the communication device based on the radio waves, a setting means that sets a radio wave-related setting value corresponding to the relative position of the electronic device, and a transmission means that transmits the set radio wave-related setting value to the electronic device. [Effects of the Invention]

[0007] According to the present invention, it is possible to control the radio wave related setting values ​​to values ​​suitable for the situation. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing how an imaging device serving as a communication device according to the present embodiment captures an image of a subject; [Figure 2] FIG. 2 is a block diagram showing a schematic configuration of the imaging device and the detected device shown in FIG. [Figure 3] 1(a) is a diagram for explaining detection of the position of a device to be detected by radio waves performed by the imaging device of FIG. [Figure 4] 1(a) is a diagram showing the relationship between the subject photographed by the imaging device of FIG. 1(a) and the angle of view. FIG. [Figure 5] 1(b) is a flowchart showing the procedure of a process for setting radio wave-related setting values ​​executed by the imaging device and the detected device of FIG. [Figure 6] FIG. 6 is a diagram for explaining the relative positions of the devices to be detected in step S502 of FIG. 5(a). [Figure 7] FIG. 6 is a diagram for explaining radio wave related setting values ​​set in steps S503 to S505 in FIG. 5(a). DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Note that in the present embodiments, a case where the present invention is applied to an imaging device as a communication device will be described, but the present invention is not limited to imaging devices. For example, the present invention may be applied to devices having an imaging function and a communication function, such as a smartphone, a tablet terminal, or a PC.

[0010] FIG. 1 is a diagram showing how an imaging device 101 serving as a communication device according to the present embodiment captures an image of a subject 103. In the present embodiment, as shown in FIG. 1(a), when a user uses the imaging device 101 to capture an image of the subject 103 wearing a target device 102 serving as an electronic device, the imaging device 101 detects the position of the target device 102 based on radio waves transmitted from the target device 102. Based on the detected position of the target device 102, the imaging device 101 displays information about the position of the subject 103 wearing the target device 102 on a display unit 208 of the imaging device 101 (described later in FIG. 2). For example, if the position of the subject 103 is outside the angle of view captured by the imaging device 101, the imaging device 101 displays information indicating the position of the subject 103 outside the angle of view in terms of angle and direction on the display unit 208, as shown in FIG. 1(b). Based on the information displayed on the display unit 208, the user can decrease the zoom ratio to widen the angle of view or adjust the orientation of the imaging device 101 so that the subject 103 fits within the angle of view.

[0011] Fig. 2 is a block diagram that schematically shows the configuration of the imaging device 101 and the configuration of the detected device 102 in Fig. 1(a). Fig. 2(a) shows the configuration of the imaging device 101. In Fig. 2(a), the imaging device 101 is made up of a battery 201, a storage unit 202, a control unit 203, an imaging unit 204, an operation unit 205, an antenna unit 206, a wireless communication unit 207, and a display unit 208.

[0012] The battery 201 is a battery such as a lithium ion battery or an alkaline battery. All blocks in the imaging device 101 are driven by power supplied from the battery 201. The storage unit 202 is composed of a ROM and / or a RAM. The storage unit 202 stores programs for performing various operations and parameters for communication. For example, the storage unit 202 stores radio wave-related setting values ​​used for communication between the detected device 102 and the imaging device 101. The radio wave-related setting values ​​include, for example, a wireless communication frequency (channel) for controlling the wireless communication unit 207 and the antenna unit 206, the radio wave intensity of the radio waves transmitted from the detected device 102, and the communication interval of the radio waves.

[0013] The control unit 203 is a processor such as a CPU or an MPU. The control unit 203 executes a program stored in the storage unit 202 to control each block. Each block operates according to instructions from the control unit 203. For example, the wireless communication unit 207 receives an instruction from the control unit 203 to detect the position of the detected device 102 and notifies the control unit 203 of the position. Radio wave-related setting values, such as the wireless communication frequency (channel), radio wave intensity, and communication interval, used to detect the position of the detected device 102 are determined according to the program stored in the storage unit 202.

[0014] Furthermore, the control unit 203 receives digital data of the subject from the imaging unit 204 and displays the received digital data on the display unit 208. When displaying this digital data on the display unit 208, the control unit 203 calculates the relative position of the detectable device 102 with respect to the imaging device 101 and displays the calculation result on the display unit 208. For example, when capturing an image of the detectable device 102, if the position of the detectable device 102 is within the angle of view, information indicating the position of the subject 103 wearing the detectable device 102 within the angle of view is displayed on the display unit 208. Furthermore, if the position of the detectable device 102 is outside the angle of view, information indicating the position of the subject 103 wearing the detectable device 102 outside the angle of view is displayed on the display unit 208 in the form of an angle and a direction. This allows a user capturing an image using the imaging device 101 to know the position of the subject to be captured, i.e., the subject 103 wearing the detectable device 102, outside the angle of view.

[0015] The imaging unit 204 is composed of a lens, a solid-state imaging element, and its peripheral circuits (not shown). The solid-state imaging element is a CCD sensor or a CMOS sensor. In the imaging device 101, an optical signal of a subject incident on the lens is converted into an electrical signal, and this electrical signal is transmitted to the control unit 203. The control unit 203 performs image processing on the received electrical signal, and displays it on the display unit 208 or records it in a recording unit (not shown). In the imaging device 101, an image captured by the imaging unit 204 can be subjected to face recognition and person recognition in an image processing unit (not shown). The position of the photographed subject can also be measured by this image processing unit. Note that if the subject is not photographed by the imaging unit 204, the position cannot be detected by the image processing unit, and therefore position detection by radio waves is effective.

[0016] The operation unit 205 includes a power button, a play button, cursor keys, levers, dials, and the like (not shown). The user issues commands to the imaging device 101 by pressing buttons on the operation unit 205 with a finger, tilting levers, or pressing the touch panel. The operation unit 205 transmits operation signals indicating the content of the operation received from the user to the control unit 203. The control unit 203 transmits appropriate commands to each block based on the received operation signals. For example, when the user operates the zoom lever in a predetermined direction, the lens magnification increases, the image magnification increases, and the field of view frame narrows. Furthermore, when the user operates the zoom lever in the opposite direction, the magnification decreases, and the field of view frame widens. For example, when information indicating the position of the subject 103 wearing the detected device 102 outside the field of view is displayed on the display unit 208 as described above, the user can easily determine how much to adjust the zoom magnification, etc. so that the subject 103 fits within the field of view. Furthermore, if the subject 103 is, for example, behind the user, it can be easily determined that the subject 103 cannot be accommodated within the angle of view even by operating the zoom lever.

[0017] The antenna unit 206 converts electrical signals into radio waves and transmits and receives them. The antenna unit 206 is adjusted to easily transmit and receive radio waves of a specific frequency, for example, 2.4 GHz or 5.0 GHz. The antenna unit 206 includes a plurality of receiver antennas 302a to 302d, as shown in FIG. 3(a), which will be described later.

[0018] The wireless communication unit 207 controls wireless communication in accordance with the Bluetooth standard (for example, IEEE802.15.1). The wireless communication unit 207 converts analog radio signals received by the antenna unit 206 into digital signals and transmits the digital signals to the control unit 203. The wireless communication unit 207 also converts data received from the control unit 203 into analog signals and transmits the converted analog signals from the antenna unit 206 as radio waves.

[0019] The display unit 208 is configured with a liquid crystal display (LCD), an organic light emitting diode (OLED), etc. The display unit 208 displays images captured by the imaging unit 204 and a UI (user interface) screen for changing settings of the imaging device 101.

[0020] 2(b) shows the configuration of the detected device 102. In FIG. 2(b), the detected device 102 is made up of a battery 209, an antenna unit 210, a control unit 211, a storage unit 212, and a wireless communication unit 213.

[0021] The battery 209 is a battery such as a lithium-ion battery or an alkaline battery. The battery 209 supplies power to all blocks in the detected device 102. In the detected device 102, the greater the power consumption, the faster the battery 209 is consumed. For example, when detecting the position of the detected device 102 using radio waves, the wireless communication unit 213 is driven and radio waves are transmitted from the antenna unit 210. The more frequently these transmissions occur and the stronger the radio wave intensity, the greater the power consumption, and the faster the battery 209 and the battery 201 of the imaging device 101 that receives the radio waves are consumed. As a result, these batteries need to be replaced more frequently, which impairs the user's experience. For this reason, there is a demand for reducing the power consumption of the detected device 102. In this embodiment, for example, the radio wave communication interval is lengthened to reduce the frequency of radio wave transmission, or the radio wave intensity is set low, thereby suppressing the consumption of the battery 209 and the battery 201.

[0022] The antenna unit 210 is a device for converting an electrical signal into a radio wave and transmitting it, or converting a received radio wave into an electrical signal. The antenna unit 210 is adjusted to easily transmit and receive radio waves of a specific frequency, for example, 2.4 GHz or 5.0 GHz. The antenna unit 210 includes one transmitter antenna 301, for example, as shown in FIG. 3(a) described below.

[0023] The control unit 211 controls all blocks in the detected device 102 in accordance with a program stored in the storage unit 212. The storage unit 212 is configured with a ROM and / or a RAM. The storage unit 212 stores programs for performing various operations and parameters for communication. For example, the storage unit 212 stores radio wave-related setting values ​​used for communication between the detected device 102 and the imaging device 101. These radio wave-related setting values ​​include, for example, a radio communication frequency (channel) for controlling the wireless communication unit 213 and the antenna unit 210, the radio wave intensity of the radio waves transmitted from the detected device 102, and the communication interval of the radio waves. The wireless communication unit 213 converts data received from the control unit 211 into an analog signal and transmits this analog signal from the antenna unit 210 as a radio wave. The wireless communication unit 213 also converts the analog signal received by the antenna unit 210 into a digital signal and transmits this digital signal to the control unit 211.

[0024] Next, a description will be given of the detection of the position of the detected device 102 using radio waves performed by the imaging device 101. For detecting the position using radio waves, for example, the AoA (Angle of Arrival) method in the Bluetooth standard is used.

[0025] Fig. 3 is a diagram for explaining detection of the position of the detected device 102 using radio waves performed by the image capturing device 101 in Fig. 1(a). In the AoA method, as shown in Fig. 3(a), the antenna unit 210 of the detected device 102 that transmits radio waves includes one transmitter antenna 301, and the antenna unit 206 of the image capturing device 101 that receives the radio waves includes multiple receiver antennas 302a to 302d.

[0026] In the AoA system, the transmitter antenna 301 of the detected device 102 transmits a direction detection signal, which is a waveform signal, as a radio wave. In the imaging device 101, the receiver antennas 302a to 302d each receive the direction detection signal transmitted from the transmitter antenna 301. Because the distances from the transmitter antenna 301 to the receiver antennas 302a to 302d are different, the imaging device 101 detects direction detection signals with different phases for each receiver antenna. In the imaging device 101, under the control of the wireless communication unit 207, the receiver antennas 302a to 302d each receive the direction detection signal transmitted from the transmitter antenna 301 in a time-division manner using a relay switch. The angle between the transmitter antenna 301 and each receiver antenna 302a to 302d is calculated based on the phase difference between the direction detection signals received by the receiver antennas 302a to 302d. The relative positions, such as the angle and distance between the detected device 102 and the image capture device 101, are determined by the calculated angle and the distance between the receiver antennas 302a to 302d according to the sine law.

[0027] In this embodiment, a configuration using the AoA method for detecting a position using radio waves will be described, but other methods, such as the AoD (Angle of Departure) method in the Bluetooth standard, may also be used.

[0028] Fig. 3(b) is a diagram for explaining the AoD method. In the AoD method, as shown in Fig. 3(b), the antenna unit 210 of the detected device 102 that transmits radio waves includes multiple transmitter antennas 303a to 303d, and the antenna unit 206 of the imaging device 101 that receives radio waves includes one receiver antenna 304.

[0029] In the AoD system, the detected device 102 transmits a plurality of waveform signals from transmitter antennas 303a to 303d in a time-division manner. In the imaging device 101, the receiver antenna 304 receives the signals transmitted in a time-division manner from the transmitter antennas 303a to 303d. The imaging device 101 calculates the phase difference between the received signals and calculates the angle between the transmitter antennas 303a to 303d and the receiver antenna 304. From the calculated angle and the distance between the transmitter antennas 303a to 303d, the relative positions, such as the angle and distance, between the detected device 102 and the imaging device 101 are determined by the sine law.

[0030] In both the AoA and AoD methods of detecting a position using radio waves, the greater the amplitude of the waveform signal transmitted from the detected device 102, the less susceptible it is to radio noise from other communication devices, and the higher the detection accuracy. On the other hand, if the amplitude of the waveform signal transmitted from the detected device 102 is increased, the detected device 102 will consume more power, which will cause batteries 209 and 201 to wear out more quickly and impair the user experience.

[0031] 4(a), when the position of a subject wearing the detectable device 102 is within the angle of view, the image capturing device 101 can recognize the subject using the image processing unit, and the position of the subject can be identified using the image processing unit. In other words, when the position of the subject wearing the detectable device 102 is within the angle of view, the accuracy of position detection using radio waves does not need to be very high.

[0032] On the other hand, when the position of the subject wearing the detected device 102 is outside the field of view, such as subject 403 outside the field of view frame 401, the imaging device 101 cannot identify the position of this subject using the image processing unit, so it is necessary to improve the accuracy of position detection using radio waves.

[0033] 4(b), when a subject wearing the target device 102 is located at a distance greater than a predetermined distance from the image capturing device 101, the subject is likely to be too small for the image processing unit to recognize. In such a case, even if the subject is located within the angle of view, it is necessary to improve the accuracy of detecting the position using radio waves.

[0034] On the other hand, if the subject wearing the detected device 102 is positioned behind the imaging device 101, the orientation of the imaging device 101 must be changed significantly (by about 180 degrees) to fit the subject within the angle of view. In such a case, the imaging device 101 only needs to inform the user that the subject is positioned in the opposite direction to the direction the imaging device 101 is facing, and the user's usability is not impaired even if the accuracy of position detection using radio waves is low. In such a case, it is preferable to prioritize power saving and reduce consumption of the battery 201 of the imaging device 101 and the battery 209 of the detected device 102.

[0035] In this way, the required accuracy in detecting a position using radio waves differs depending on the relative position of the subject with respect to the image capture device 101. In summary, the accuracy is as shown in Table 1 below.

[0036] [Table 1]

[0037] However, in the conventional technology, the radio wave-related setting values ​​that were initially set are used as they are, and therefore it is not possible to control the radio wave-related setting values ​​to values ​​that are appropriate for the situation.

[0038] In contrast, in this embodiment, the imaging device 101 sets radio wave-related setting values ​​corresponding to the relative position of the detected device 102, and transmits the set radio wave-related setting values ​​to the detected device 102. In addition, the detected device 102 sets the radio wave-related setting values ​​received from the imaging device 101, and transmits radio waves based on the set radio wave-related setting values.

[0039] 5 is a flowchart showing the procedure for setting radio wave-related setting values ​​executed by the image capturing device 101 and the detected device 102 in FIG. 1(a). FIG. 5(a) is a flowchart showing the procedure for setting radio wave-related setting values ​​executed by the image capturing device 101. This setting process for radio wave-related setting values ​​is realized by the control unit 203 of the image capturing device 101 executing a program stored in the storage unit 202 or the like. In this setting process for radio wave-related setting values, it is assumed that the detected device 102 is transmitting the radio waves of the waveform signal described above based on the radio wave-related setting values ​​that are preset default values.

[0040] 5(a), in step S501, the control unit 203 causes the wireless communication unit 207 to detect the position of the detected device 102 based on radio waves received by the antenna unit 206. The wireless communication unit 207 notifies the control unit 203 of the detected position of the detected device 102. Next, in step S502, the control unit 203 determines the relative position of the detected device 102 with respect to the imaging device 101 based on the position of the detected device 102 acquired from the wireless communication unit 207.

[0041] In step S502, if the control unit 203 determines that the relative position of the detectable device 102 is on the rear side of the imaging device 101 (see, for example, area 601 in FIG. 6 ), the process of step S503 is executed. In step S503, the control unit 203 sets, as the radio wave-related setting value corresponding to this relative position, a first radio wave-related setting value that reduces power consumption associated with detecting the position of the detectable device 102 using radio waves. The first radio wave-related setting value is the radio wave-related setting value that is most power-efficient when detecting the position of the detectable device 102 using radio waves. This makes it possible to reduce power consumption associated with detecting the position of the detectable device 102 using radio waves without impairing the user experience in situations where high accuracy in detecting the position of the detectable device 102 using radio waves is not required. As a result, it is possible to reduce the frequency of replacing the battery 201 of the imaging device 101 and the battery 209 of the detectable device 102. As the first radio wave-related setting value, for example, a radio wave intensity lower than the default value and a communication interval longer than the default value are set (see, for example, 701 and 702 in FIG. 7(a)). As an example of specific values, the values ​​shown in 711 and 712 in FIG. 7(b) are set. Next, the process of step S506, which will be described later, is executed.

[0042] In step S502, if the control unit 203 determines that the relative position of the detectable device 102 is on the side of the image capture device 101 (see, for example, area 602a in FIG. 6), or if the control unit 203 determines that the relative position of the detectable device 102 is on the front side of the image capture device 101 and the distance to the detectable device 102 is equal to or greater than a predetermined value (see, for example, area 602b in FIG. 6), the process of step S504 is executed. In step S504, the control unit 203 sets, as the radio wave-related setting value corresponding to these relative positions, a second radio wave-related setting value that increases the accuracy of position detection using radio waves. The second radio wave-related setting value is the radio wave-related setting value that maximizes the accuracy of position detection using radio waves. This makes it possible to increase the accuracy of position detection in situations where accuracy in position detection of the detectable device 102 using radio waves is required. As the second radio wave-related setting value, for example, the maximum radio wave strength and the shortest communication interval are set (see, for example, 703 and 704 in FIG. 7(a)). As an example of specific values, the values ​​shown in 713 and 714 in Fig. 7(b) are set. Next, the process of step S506, which will be described later, is executed.

[0043] In step S502, if the control unit 203 determines that the relative position of the detected device 102 is on the front side of the imaging device 101 and that the distance to the detected device 102 is less than a predetermined value (see, for example, area 603 in FIG. 6), the process of step S505 is executed. In step S505, the control unit 203 sets a third radio wave-related setting value as the radio wave-related setting value corresponding to this relative position. The third radio wave-related setting value is set to, for example, a radio wave intensity and a communication interval that are approximately intermediate between those of the first radio wave-related setting value and the second radio wave-related setting value (see, for example, 705 in FIG. 7(a)). As an example of a specific value, the value shown in 715 in FIG. 7(b) is set. Next, the process of step S506, which will be described later, is executed.

[0044] In step S506, the control unit 203 controls transmission of the radio wave related setting values ​​set in any of steps S503 to S505 to the detected device 102. Specifically, the control unit 203 instructs the wireless communication unit 207 to transmit the radio wave related setting values ​​to the detected device 102. Upon receiving this instruction, the wireless communication unit 207 transmits the radio wave related setting values ​​from the antenna unit 206 to the detected device 102. Thereafter, this process ends.

[0045] 5(b) is a flowchart showing the procedure of the radio wave-related setting value setting process executed by the detected device 102. This radio wave-related setting value setting process is realized by the control unit 211 of the detected device 102 executing a program stored in the storage unit 212 or the like. This radio wave-related setting value setting process is executed when the antenna unit 210 of the detected device 102 receives the radio wave-related setting value transmitted from the imaging device 101 by the radio wave-related setting value setting process of FIG. 5(a) described above. When the antenna unit 210 receives the radio wave-related setting value, the wireless communication unit 213 transfers the radio wave-related setting value to the control unit 211.

[0046] 5B, first, in step S507, control unit 211 acquires radio wave-related setting values ​​from wireless communication unit 213. Next, in step S508, control unit 211 sets the acquired radio wave-related setting values. The set radio wave-related setting values ​​are stored in storage unit 212. Next, in step S509, control unit 211 controls transmission of radio waves of the waveform signal described above based on the radio wave-related setting values ​​set in step S508. Specifically, control unit 211 instructs wireless communication unit 213 to transmit radio waves. Upon receiving this instruction, wireless communication unit 213 transmits radio waves of the waveform signal described above from antenna unit 210 based on the radio wave-related setting values ​​set in step S508. For example, when a first radio wave-related setting value is received from imaging device 101, detected device 102 transmits radio waves with a radio wave intensity lower than the default value at a communication interval longer than the default value. Furthermore, when the second radio wave-related setting value is received from the image capture device 101, the detected device 102 transmits radio waves with the maximum radio wave strength at the shortest communication interval, after which the process ends.

[0047] According to the above-described embodiment, the imaging device 101 sets radio wave-related setting values ​​corresponding to the relative position of the detected device 102 and transmits the set radio wave-related setting values ​​to the detected device 102. The detected device 102 also sets radio wave-related setting values ​​received from the imaging device 101 and transmits radio waves based on the set radio wave-related setting values. This makes it possible to control the radio wave-related setting values ​​to values ​​appropriate for the situation.

[0048] In the above-described embodiment, the imaging device 101 includes multiple receiver antennas 302a to 302d, and the detected device 102 includes one transmitter antenna 301. As a result, in a configuration in which the position of the detected device 102 is detected using the AoA method, it is possible to control the radio wave-related setting values ​​to values ​​appropriate for the situation.

[0049] Furthermore, in the above-described embodiment, the imaging device 101 includes one receiver antenna 304, and the detected device 102 includes multiple transmitter antennas 303a to 303d. As a result, in a configuration in which the position of the detected device 102 is detected using the AoD method, it is possible to control the radio wave-related setting values ​​to values ​​appropriate for the situation.

[0050] The above-described embodiment includes an imaging unit 204 that captures an image of a subject wearing the detectable device 102, and detects the position of the subject wearing the detectable device 102 based on radio waves transmitted from the detectable device 102. As a result, when capturing an image of a subject wearing the detectable device 102 and detecting the position of the subject, it is possible to control radio wave-related setting values ​​to values ​​appropriate for the situation.

[0051] The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and having one or more processors in the computer of the system or device read and execute the program. It can also be realized by a circuit (e.g., ASIC) that realizes one or more functions. [Explanation of symbols]

[0052] 101 Imaging device 102 Detectable Device 203 Control Unit 204 Imaging unit 211 Control Unit 301 Transmitter Antenna 302a~302d Receiver antennas 303a~303d Transmitter antenna 304 Receiver Antenna

Claims

1. A communication device that receives radio waves transmitted from an electronic device based on a preset radio wave-related setting value, a determination means for determining a relative position of the electronic device with respect to the communication device based on the radio wave; a setting means for setting a radio wave-related setting value corresponding to the relative position of the electronic device; A communication device comprising a control unit that controls transmission of the set radio wave related setting value to the electronic device.

2. The communication device described in claim 1, characterized in that when the relative position of the electronic device is on the rear side of the communication device, the setting means sets a first radio wave-related setting value that reduces power consumption associated with detecting the position of the electronic device using the radio waves.

3. The communication device described in claim 1 or 2, characterized in that when the relative position of the electronic device is on the side of the communication device, the setting means sets a second radio wave-related setting value that increases the accuracy of detecting the position of the electronic device using the radio waves.

4. The communication device according to claim 3, characterized in that when the relative position of the electronic device is on the front side of the communication device and the distance from the communication device to the electronic device is equal to or greater than a predetermined value, the setting means sets the second radio wave-related setting value.

5. 5. The communication device according to claim 1, wherein the radio wave-related setting values ​​include a radio wave intensity of the radio wave transmitted from the electronic device and a communication interval of the radio wave.

6. The communication device according to any one of claims 1 to 5, characterized in that the communication device is an imaging device that has an imaging means for imaging a subject wearing the electronic device and detects the position of the subject wearing the electronic device based on radio waves transmitted from the electronic device.

7. 7. The communication device according to claim 1, further comprising a plurality of receiver antennas for receiving radio waves transmitted from a single transmitter antenna provided in the electronic device.

8. 7. The communication device according to claim 1, further comprising one receiver antenna for receiving radio waves transmitted from a plurality of transmitter antennas provided in the electronic device.

9. A control method for a communication device that receives radio waves transmitted from an electronic device based on preset radio wave-related setting values, comprising: a determination step of determining a relative position of the electronic device with respect to the communication device based on the radio waves; a setting step of setting a radio wave-related setting value corresponding to the relative position of the electronic device; a control step of controlling transmission of the set radio wave-related setting value to the electronic device.

10. A program for causing a computer to execute each means of the communication device according to any one of claims 1 to 8.

Images