JP6152242B2 - Method for ensuring information security of portable electronic device, portable electronic device and function expansion device - Google Patents

Description

  The present invention relates to a technology for ensuring information security while reducing power consumption of a portable electronic device connected wirelessly to a peripheral device, and further reducing power consumption of a portable electronic device communicating with a function expansion device wirelessly. The present invention relates to technology for ensuring information security.

  As one of function expansion devices for notebook personal computers (notebook PCs), there is a port replicator. The port replicator has various standard ports for connecting peripheral devices and is placed on the desk. The notebook PC can be used in a mobile environment while reducing the size and weight, and in an office environment, the notebook PC connected to the port replicator can be used with the operability of a desktop personal computer. ing.

  In recent years, wireless port replicators (hereinafter referred to as wireless docks) in which port replicators and notebook PCs are connected using high-speed short-range wireless platforms such as UWB (trademark) and WiGig (Wireless Gigabit) have emerged. ing. Patent Document 1 discloses an invention in which an information processing apparatus connected to a mobile communication terminal by short-range wireless communication extends the function using the mobile communication terminal. In this document, the mobile communication terminal and the information processing apparatus provide different functions to the information processing apparatus according to the distance between the mobile communication terminal and the information processing apparatus that are determined by measuring the field strength for short-range wireless communication. It is described.

  Patent Document 2 discloses an invention in which an intermediary terminal establishes an omnidirectional wireless communication connection to two communication devices within a communication distance range using an omnidirectional wireless communication function and a directional communication function. Disclose. Patent Document 3 discloses a hard disk drive (HDD) that is connected to a notebook PC via the function expansion device when the notebook PC suddenly leaves the function expansion device in a wirelessly connected notebook PC and function expansion device. An invention for ejecting and protecting data is disclosed. This document describes that the distance is captured by the intensity of the radio wave.

International Publication WO2010 / 131717 JP 2004-200787 A JP 2009-175881 A

  WiGig used for wireless connection between a notebook PC and a wireless dock has a communication distance of about 10 meters. Even if the user does not perform any special operation, the notebook PC and the wireless dock can be connected automatically when the notebook PC approaches the wireless dock and disconnected when the user leaves the notebook PC. This is convenient because the notebook PC can be used in a mobile environment and an office environment without having to do it. A method of connecting and disconnecting without such a user is referred to as seamless connection.

  For seamless connection, the WiGig communication module installed in the notebook PC and wireless dock can always be reconnected when entering the communication area, even when the other party is outside the communication area. Must be in scan state. However, since the operating frequency of WiGig is as high as 60 GHz, there is a problem that power consumption is larger than that of a communication module of a wireless LAN or UWB, and in particular, the battery of the notebook PC becomes extremely consumed.

  In addition, an external display that displays image data output from the notebook PC can be connected to the wireless dock by a wired connection. When the user is on the side of the external display on the desk, information security on the screen can be ensured. When the user carrying the notebook PC moves to the conference room and enters the WiGig communication range, the image on the external display disappears.

  At this time, even if the user is going to move outside the communication range and leaves the desk side, the user may stay in the WiGig communication range for a while, and during that time, image data is output from the notebook PC to the external display. May continue to be. Also, when the user moves from outside the WiGig communication range to the communication range, the image of the notebook PC may be displayed on the external display of his / her seat before returning to his / her seat, ensuring information security and privacy. An unfavorable state was also generated from the viewpoint of protection. Such a problem does not occur if the user stops the output of image data from the notebook PC or stops the wireless module every time the user moves, but seamless connection cannot be realized.

  Accordingly, an object of the present invention is to provide a method for ensuring information security of a portable electronic device while making a seamless wireless connection with a peripheral device. It is a further object of the present invention to provide a method for protecting the privacy of a user who owns such a portable electronic device. It is a further object of the present invention to provide a method for reducing the power consumption of such portable electronic devices and peripheral devices. A further object of the present invention is to provide a portable electronic device, a function expansion device, and a computer program that realize such a method.

  According to a first aspect of the present invention, there is provided a first electronic device including a first wireless module that performs short-range wireless communication, a second wireless module that consumes less power than the first wireless module, and a first wireless device. Provided is a communication method for a second electronic device equipped with a third wireless module capable of communicating with a module and a fourth wireless module capable of communicating with a second wireless module. In the separated state, the first wireless module stops. Therefore, the first electronic device can reduce power consumption.

  The first electronic device detects an approaching state through a communication state between the second wireless module and the fourth wireless module. Even if the second wireless module is operated, the influence on the power consumption of the first electronic device is smaller than when the operation of the first wireless module is continued. In response to the detection, the first electronic device operates the first wireless module, and the first wireless module and the third wireless module establish a connection. Therefore, even if the first wireless module is stopped in the separated state, seamless wireless connection can be maintained when entering the approached state, thereby ensuring information security and protecting privacy.

  The first electronic device can be a portable electronic device, and the second electronic device can be a function expansion device for the first electronic device. The approach state can be detected by measuring the received signal strength of the radio wave transmitted by the fourth wireless module. The approaching state can also be detected by recognizing that the second wireless module and the fourth wireless module are connected.

  When the third wireless module stops in the separated state, the first electronic device can operate the third wireless module by connecting the second wireless module and the fourth wireless module in the approaching state. Therefore, the power consumption of the second electronic device can be reduced while realizing seamless wireless connection. The first electronic device can detect the separation state through the communication state between the second wireless module and the fourth wireless module, and can stop the first wireless module and / or the third wireless module. As a result, it is possible to ensure information security and protect privacy when shifting to a remote state while maintaining a seamless wireless connection. Furthermore, the power consumption of the first electronic device and the second electronic device can be reduced.

  The second aspect of the present invention provides still another communication method in the first electronic device and the second electronic device in the first aspect. In the separated state, the first wireless module and the third wireless module are stopped. The first electronic device detects the approach state through the communication state between the second wireless module and the fourth wireless module, and operates the first wireless module. Further, the second electronic device detects the approach state through the communication state between the fourth wireless module and the second wireless module, and operates the third wireless module. In this case, even when the second wireless module and the fourth wireless module are not connected, the operations of the first wireless module and the third wireless module can be controlled when entering the approaching state.

  According to a third aspect of the present invention, there is provided a portable electronic device equipped with a first wireless module that performs short-range wireless communication and a peripheral device equipped with a second wireless module that communicates with the first wireless module. A method for ensuring information security of electronic devices is provided. The first wireless module stops in the separated state. The portable electronic device detects the approaching state to the peripheral device and operates the first wireless module. The portable electronic device sends data to the peripheral device through the first wireless module and the second wireless module. Since data is sent after entering the proximity state, it is possible to secure information security and protect privacy.

  The portable electronic device can detect the separation state with respect to the peripheral device and stop the first wireless module. Accordingly, it is possible to ensure information security and protect privacy even when shifting from the approaching state to the separated state. The peripheral device can be a function expansion device of a portable electronic device. The peripheral device can be a display or a hard disk drive.

  A fourth aspect of the present invention provides a method for ensuring information security of a portable electronic device in the portable electronic device and the peripheral device in the third aspect. The second wireless module stops in the separated state. The peripheral device detects the approaching state of the portable electronic device and operates the second wireless module. Further, the peripheral device detects the separation state of the portable electronic device and stops the second wireless module. In this case, it is possible to ensure information security and protect privacy with only peripheral devices.

  According to the present invention, it is possible to provide a method for ensuring information security of a portable electronic device while making a seamless wireless connection with a peripheral device. Furthermore, the present invention can provide a method for protecting the privacy of a user who owns such a portable electronic device. Furthermore, the present invention can provide a method for reducing the power consumption of such portable electronic devices and peripheral devices. Further, according to the present invention, it is possible to provide a portable electronic device, a function expansion device, and a computer program that realize such a method.

It is a figure for demonstrating a mode that the notebook PC 100 and the wireless dock 200 communicate. It is a figure for demonstrating an approach state and a separation state. It is a schematic functional block diagram for demonstrating the structure of notebook PC. It is a schematic functional block diagram for demonstrating the structure of a radio | wireless dock. It is a state transition diagram for demonstrating operation | movement of a BLE module. It is a flowchart for demonstrating the procedure which controls operation | movement of a notebook PC and a wireless dock.

  FIG. 1 is a diagram for explaining a state in which a notebook PC 100 as an example of a portable electronic device and a wireless dock 200 as an example of a peripheral device communicate with each other. In the notebook PC 100, a display casing on which the display 101 is mounted and a system casing on which a keyboard 103 is mounted on the surface are coupled by a hinge mechanism. The notebook PC 100 can be connected to an access point (AP) 323 connected to the network 321 through a wireless LAN communication channel 325.

  In one example, the notebook PC 100 can perform short-range wireless communication with the wireless dock 200 through a communication channel 327 of the WiGig (hereinafter referred to as WG) standard. The WG realizes short-distance high-speed digital wireless transmission of about 10 meters using 60 GHz band radio waves. WG, on the other hand, consumes a large amount of power, so reducing power consumption is a problem especially in notebook PCs 100 operating on batteries. The notebook PC 100 can further communicate with the wireless dock 200 via a communication channel 329 of Bluetooth (registered trademark) Low Energy (hereinafter referred to as BLE).

  BLE is a new standard added in the Bluetooth (registered trademark) standard (Ver4.0), which is not compatible with the previous standard Bluetooth (registered trademark) standard, but consumes much more power than WG. There is an advantage of being small. In this embodiment, paying attention to the low power consumption of the BLE, the BLE communication channel 329 is used to control the operation of the WG wireless module.

  The wireless dock 200 is a function expansion device of the notebook PC 100 called a docking station or a port replicator. In one example, the wireless dock 200 can communicate with the notebook PC 100 using the communication channel 327 of the WG using PCIe and DP (DisplayPort) protocols. The wireless dock 200 includes receptacles such as a DP port, a USB port, a LAN port, and a PS / 2 port. FIG. 1 shows a state in which peripheral devices such as an external display 303, a mouse 305, a keyboard 307, a router 324 connected to a network 321 and an HDD 301 are connected to the wireless dock 200 using these ports. ing.

  When the notebook PC 100 establishes the connection of the communication channel 327 of the WG, the notebook PC 100 can use the wireless dock 200 with the display housing opened or closed. When used in a closed state, it can be operated like a desktop personal computer using the external display 303, mouse 305 and keyboard 307 as user interfaces. Therefore, especially when the user carries the notebook PC 100 in a closed state, the user may not be aware that data is being output to the wireless dock 200.

  FIG. 2 is a diagram for explaining the approaching state and the separation state defined with respect to the distance between the notebook PC 100 and the wireless dock 200. The approaching state corresponds to a state where the notebook PC 100 exists in a circular area 351 centered on the wireless dock 200. The area 351 corresponds to a range in which peripheral devices can be physically managed in terms of privacy and information security even when data is output from the notebook PC 100 to the wireless dock 200 when the user exists there. Here, “physical management” means that the display on the external display 303 can be prevented from being looked at by others, or physical tampering with the HDD 301 can be prevented.

  On the other hand, the separated state is a state in which the notebook PC 100 exists outside the area 351. When the user exists outside the area 351, the peripheral device cannot be physically managed. The radius of the region 351 may be 2 meters to 3 meters in one example. The region 351 is not a range in which the distance is specified geometrically, but is specified by various detection methods described below, but the geometric distance is an indefinite range. In one example, the area 351 can be specified as the magnitude of the received signal strength (RSSI) of the radio wave measured by the BLE communication channel 329.

  The notebook PC 100 is carried by the user and the distance to the wireless dock changes. An area 353 corresponds to a range in which the notebook PC 100 and the wireless dock 200 can communicate with each other via the WG communication channel 327. Characteristically, the region 351 is narrower than the region 353. The communication range of the BLE communication channel 329 may be wider or narrower than the region 353 as long as the region 351 can be detected. In the approaching state, it is possible to always communicate with the WG wireless channel 327, but in the separated state, a range in which communication can be performed on the WG wireless channel 327 with and without an area 353 occurs.

  FIG. 3 is a schematic functional block diagram for explaining the configuration of the notebook PC 100. FIG. 3 is described in a simplified manner within a range necessary for explaining the present embodiment. The application execution unit 151 includes software such as a device driver, an OS, and an application program, and hardware such as a CPU, a system memory, an I / O chipset, and an I / O device that execute the software. Application programs include mailers and document programs. For example, the application execution unit 151 generates image data to be displayed on the external display 303 and outputs the image data to the wireless dock 200.

  In one example, the WG control unit 153 and the approach determination unit 155 can be configured by the above hardware and device driver. The WG control unit 153 controls the operations of the WG module 161 and the BLE module 163 based on the output of the approach determination unit 155. The approach determination unit 155 determines the approach state and the separation state from the RSSI acquired from the BLE module 163. The WG module 161, the BLE module 163, and the WLAN module 165 are physical layer devices for performing wireless communication using the WG communication channel 327, the BLE communication channel 329, and the wireless LAN communication channel 325, respectively.

  FIG. 4 is a schematic functional block diagram for explaining the configuration of the wireless dock 200. The WG module 261 and the BLE module 263 are physical layer devices for communicating via the WG communication channel 327 and the BLE communication channel 329, respectively. In one example, the WG module 261 uses the WG communication channel 327 to transmit packets using the PCIe protocol and the DP protocol. A DP controller 207 and a PCIe bridge 201 are connected to the WG module 261. The PCIe bridge 201 is connected to the USB controller 209, the Ethernet controller 211 (Ethernet is a registered trademark), the mouse controller 213, and the keyboard controller 215 on the secondary side.

  The DP controller 207, USB controller 209, Ethernet controller 211, mouse controller 213, and keyboard controller 215 are connected to the external display 303, HDD 301, network 321, via receptacles provided in the housing of the wireless dock 200, respectively. A mouse 305 and a keyboard 307 are connected. The WG control unit 253 is connected to the BLE module 263 and controls the operation of the power supply unit 203. The power supply unit 203 supplies power to devices constituting the wireless dock 200 using a commercial power supply, a battery, and the like as a power source.

  FIG. 5 is a state transition diagram for explaining the operating state of the BLE modules 163 and 263. One of the BLE modules 163 and 263 operates as a central 275 and the other operates as a peripheral 277. The central 275 includes a standby state, a scanning state, an initiating state, and a connected state. The peripheral 277 includes a standby state, an advertising state, and a connection state.

  The advertising channel 271 is established between the scanning or initiating state central and the advertising state peripheral. The data channel 273 is built between the connected central and the connected peripheral. The WG control units 153 and 253 switch the operating state of the BLE modules 163 and 263 according to the procedure shown in FIG.

  FIG. 6 is a flowchart for explaining an example of operations of the notebook PC 100 that transitions between the separated state and the approaching state, and the wireless dock 200. Blocks 401 to 425 indicate the operation of the notebook PC 100, and blocks 451 to 465 indicate the operation of the wireless dock 200. In blocks 401 and 451, it is assumed that the notebook PC 100 and the wireless dock 200 are in a separated state. In the separated state, the BLE modules 163 and 263 operate, but at least the WG module 161 of the notebook PC 100 stops. The WLAN module 165 is connected to the AP 323.

  Since the BLE module 163 has low power consumption, the power consumption of the notebook PC 100 can be reduced by stopping the WG module 161. In block 451, the wireless dock 200 operates the WG control unit 253 and the BLE module 263. In one example, the power of the WG module 261 and each controller is stopped. Therefore, in the separated state, the power consumption of the wireless dock 200 can also be reduced. In order to reduce the battery consumption of the notebook PC 100, it is preferable that the BLE module 263 transitions to the advertising state and transmits the advertising packet. In one example, in the notebook PC 100, the WG control unit 153 centralizes the BLE module 163. In the wireless dock 200, the WG control unit 253 operates the BLE module 263 as a peripheral.

  In block 453, the WG control unit 253 switches the BLE module 263 to the advertising state and periodically transmits the advertising packet. In block 403, the WG control unit 153 switches the BLE module 163 to the scanning state, and receives the advertising packet in the passive scan. In block 405, the BLE module 163 sends the RSSI measured by the preamble of the received advertising packet to the approach determination unit 155.

  For example, after the meeting, a user carrying the notebook PC 100 approaches the seat where the wireless dock 200 is provided. When the notebook PC 100 enters the area 353, the notebook PC 100 and the wireless dock 200 can communicate with each other via the WG communication channel 327, but the WG modules 161 and 261 are stopped, so the WG communication channel is stopped. 327 is not constructed. Note that the WG communication channel 327 is not established even when one of the WG modules 161 and 261 stops.

  In block 407, the approach determination unit 155 evaluates the RSSI size until the RSSI increases to a predetermined value corresponding to the region 351. In block 409, the approach determination unit 155 notifies the WG control unit 153 when detecting that the notebook PC 100 has entered the approach state based on the size of the RSSI. The WG control unit 153 that has received the notification switches the BLE module 163 to the initiating state.

  When the WG control unit 153 determines from the advertising packet received by the BLE module 163 that the wireless dock 200 is a connectable partner, the WG control unit 153 sends a participation application command to the wireless dock 200. Thereafter, the WG control unit 153 switches the BLE module 163 to a connected state. The WG control unit 253 that has received the participation application switches the BLE module 263 to the connected state in block 455. The BLE modules 163 and 263 that have shifted to the connected state can periodically exchange packets by a polling method from the central to the peripheral.

  In block 411, the WG control unit 153 wakes up the WG module 161. In block 413, the WG control unit 153 sends a command to wake the WG module 261 of the wireless dock 200 through the BLE communication channel 329. The WG control unit 253 that has received the command instructs the power supply unit 203 to activate the power supply of the WG module 261 in block 457.

  In block 415, the WG control unit 153 switches the BLE module 163 to the scanning state, and in block 459, the WG control unit 253 switches the BLE module 263 to the advertising state. As a result, the BLE module 163 sends the RSSI measured from the received advertising packet preamble to the approach determination unit 155 in the same manner as the block 405. Thereafter, the approach determination unit 155 continues monitoring RSSI to determine the transition to the separated state.

  In blocks 417 and 461, the operated WG modules 161 and 261 automatically complete the connection by detecting the beacon frame transmitted by one of them in the active scan or the passive scan. The user can seamlessly construct the communication channel 327 of the WG simply by bringing the notebook PC 100 into the close state. Further, since the WG modules 161 and 261 operate after the notebook PC 100 enters the approaching state, the WG modules 161 and 261 do not consume any power in the separated state.

  In block 463, the WG control unit 253 instructs the power supply unit 203 to activate the power supply of the PCIe controller 201, DP controller 207, USB controller 209, Ethernet controller 211, mouse controller 213, and keyboard controller 215. In block 419, the WG control unit 153 notifies the application execution unit 151 that the WG communication channel 327 has been established. The application execution unit 151 enumerates and recognizes a device connected to the wireless dock 200.

  The application execution unit 151 outputs image data when the DP controller 207 is recognized. Until now, when seamlessly connecting, if the notebook PC 100 enters the area 353, the image of the notebook PC 100 is automatically displayed on the external display 303. However, in this embodiment, the notebook PC 100 enters the approaching state. To output the image data of the notebook PC 100 to the external display 303. Therefore, even when the user stays between the area 351 and the area 353, information security can be ensured and privacy can be protected.

  When the application execution unit 151 recognizes the Ethernet controller 211, it disconnects the wireless LAN communication channel 325 and accesses the network 321 through the Ethernet controller 211. Alternatively, the user can access the HDD 301 by inputting the HDD password from the keyboard 307. The HDD 301 once unlocked is not locked unless it is reset, but it is safe when the user is in the vicinity of the wireless dock 200.

  In block 421, it is assumed that the user carries the notebook PC 100 and leaves the seat. The approach determination unit 155 determines that the RSSI value has fallen and has entered a separated state. In order to make a seamless connection, the image of the notebook PC 100 has been displayed on the external display 303 until the notebook PC 100 is outside the area 353. Also, since the HDD 301 is unlocked, there is a high possibility that a third party may illegally access the HDD 301 through the WG communication channel 327 or the network 321.

  In block 423, the WG control unit 153 sends a stop command to the wireless dock 200 through the communication channel 327 of the WG. The command may be issued through the communication channel of BLE329. The WG control unit 253 stops the power supply of all devices of the wireless dock 200 except for the BLE module 263. The screen of the external display 303 disappears, the HDD 301 is reset, and shifts to the locked state.

  In block 425, the WG control unit 153 stops the WG module 161 and operates the WLAN module 165. Therefore, it is possible to ensure information security and protect privacy even when shifting to the separated state. Moreover, after shifting to the separated state, power consumption of the notebook PC 100 and the wireless dock 200 can be reduced. Transition from the approaching state to the separated state can also be performed seamlessly without any user operation.

  The procedure described in FIG. 6 is an example of the present invention, and it is not necessary to make all the procedures essential, and the order is not limited to this. The scope of the present invention is as set forth in the appended claims. For example, since the BLE modules 163 and 263 consume much less power than the WG modules 161 and 261, the BLE module 163 may operate as a central and the BLE module 263 may operate as a peripheral. At this time, the wireless dock 200 can control the operation of the WG module 161 in the approaching state and the separated state through the BLE communication path 329.

  Also, instead of the method in which either the notebook PC 100 or the wireless dock 200 measures RSSI and controls the operation of the partner WG modules 161 and 261 through the BLE communication path 329, the notebook PC 100 and the wireless dock 200 are independent of each other. Then, the RSSI of the other party's radio wave may be measured. For example, the notebook PC 100 measures RSSI from the advertising packet, and the wireless dock 200 measures RSSI from the packet transmitted by the notebook PC 100 in the initializing state, and controls the operation of the WG modules 161 and 261, respectively. You may do it.

  At this time, the BLE module 163 may perform an active scan in a scanning state and transmit a packet for RSSI measurement to the WG control unit 253. When the notebook PC 100 and the wireless dock 200 independently measure the RSSI of the other party's radio wave and independently detect the approaching state and the separation state, it is not necessary to construct the BLE communication path 329 in the blocks 409 and 455.

  Moreover, although the example which measures RSSI and determines the approach state and the separation state of the notebook PC 100 and the wireless dock 200 has been described, the transmission output of the BLE modules 163 and 263 is reduced to the extent that the region 351 is a communication distance. The WG control units 153 and 253 may recognize and determine connection processing and disconnection processing automatically performed by the BLE modules 163 and 263.

  The example in which the approach state is detected by measuring the RSSI of the BLE modules 163 and 263 has been described. However, the present invention is not limited to infrared communication, classic Bluetooth (registered trademark) standard communication, or a user mounted on the wireless dock 200 by a user. You may judge by face authentication. Alternatively, an acceleration sensor mounted on the notebook PC 100 may be used. In this case, from the magnitude of acceleration, it can be determined that the user is in the separated state while carrying the notebook PC 100, and can be determined to be in the approaching state when the notebook PC 100 is placed on the desk.

  In the separated state, the notebook PC 100 may communicate with a device mounted with a WG module other than the wireless dock 200. In this case, the user can operate the WG module 161 that has been stopped in the above procedure. Even if the WG module 161 is operated and enters the approaching state, the WG module 261 of the wireless dock 200 is stopped, so that privacy protection and information security can be ensured.

  In addition, the WG module 161 of the notebook PC 100 is always operated, and the wireless dock 200 controls the operation of the WG module 261 by a method such as RSSI measurement, use of infrared communication, face authentication by a camera, etc. to protect privacy and information. Security can be ensured. Although an example in which the notebook PC 100 and the wireless dock 200 are connected has been described, the present invention can also be applied to a case where the notebook PC 100 is directly connected to a peripheral device without passing through the wireless dock 200. Further, the present invention can be applied to a tablet terminal or a smartphone instead of the notebook PC 100. Although WG has been described as an example of short-range wireless communication, the present invention can employ other communication methods such as UWB (trademark).

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

100 notebook PC
200 Wireless dock 271 Advertising channel 273 Data channel 275 Central 277 Peripheral 321 Wireless LAN network 325 Wireless LAN communication channel 327 WG communication channel 329 BLE communication channel 351 Boundary state 353 WG communication channel Communication range

Claims (11)

A portable electronic device equipped with a first wireless module that performs short-range wireless communication, a second wireless module that consumes less power than the first wireless module, and a third wireless communication device that can communicate with the first wireless module. A function expansion device of the portable electronic device in which a wireless module and a fourth wireless module capable of communicating with the second wireless module are mounted,
A first area where the user holding the portable electronic device can physically manage the adequacy of data transfer to a peripheral device connected to the function expansion device, and the first wireless module outside the first area And defining a second area including a range in which the third wireless module can communicate around the function expansion device ;
Stopping the first wireless module in a separated state where the portable electronic device is present in the second region;
The portable electronic device detecting an approaching state existing in the first region through a communication state of the second wireless module and the fourth wireless module;
The portable electronic device operating the first wireless module in response to detection of the approach state;
The first wireless module and the third wireless module establishing a connection.   The method according to claim 1, wherein the step of detecting the approach state includes a step of measuring a received signal strength of a radio wave transmitted by the fourth wireless module.   The method according to claim 1, wherein detecting the approach state comprises recognizing that the second wireless module and the fourth wireless module are connected. Stopping the third wireless module in the separated state;
The method according to claim 1, further comprising: connecting the second wireless module and the fourth wireless module in the approaching state, and causing the portable electronic device to operate the third wireless module. The portable electronic device detecting the separation state through a communication state of the second wireless module and the fourth wireless module;
The method according to claim 1, further comprising: causing the portable electronic device to stop the first wireless module in response to detection of the separation state. The method according to claim 5 , further comprising the step of causing the portable electronic device to stop the third wireless module in response to detecting the separated state. A portable electronic device capable of short-range wireless communication with a function expansion device ,
A first wireless module for realizing the short-range wireless communication with the function expansion device ;
An application execution unit that outputs data to a peripheral device connected to the function expansion device through the first wireless module;
The portable electronic device has an access state existing in a first area where a user holding the portable electronic apparatus can physically manage whether or not data transfer to the peripheral device is appropriate, and outside the first area. A second wireless module for detecting a separation state existing in a second region including a range in which the first wireless module can communicate with the function expansion device ;
A portable electronic device comprising: a control unit that operates the first wireless module in response to detection of the approaching state and stops the first wireless module in response to detection of the separated state. The portable electronic device according to claim 7 , wherein the first wireless module conforms to a Wireless Gigabit standard, and the second wireless module conforms to a Bluetooth Low Energy standard (Bluetooth is a registered trademark). A function expansion device capable of short-range wireless communication with a portable electronic device,
A wireless module for realizing the short-range wireless communication;
A controller that outputs data received from the portable electronic device through the wireless module to a peripheral device connected to the function expansion device;
The portable electronic device has an access state that exists in a first area in which a user holding the portable electronic device can physically manage whether data transfer from the function expansion device to the peripheral device is appropriate, and the first An approach state detection unit for detecting a separation state existing in a second region including a range in which the wireless module can communicate outside the region;
A controller that wirelessly connects to the portable electronic device when the approaching state is detected, operates a wireless module mounted on the portable electronic device, and stops the wireless module when the separated state is detected; Function expansion device having. In portable electronic devices equipped with wireless modules that perform near field communication with function expansion devices ,
The portable electronic device has a proximity state that exists in a first area in which a user holding the portable electronic device can physically manage whether or not data transfer to a peripheral device connected to the function expansion device is present, and the first A function of detecting a separation state existing in a second region including a range in which the wireless module can communicate outside of the region;
A function of stopping the wireless module when the separation state is detected;
A function of operating the wireless module when detecting the approaching state;
A computer program for realizing a function of outputting data to the peripheral device through the wireless module. Including a function of stopping the wireless module performing short-range wireless communication mounted on the function expansion device when detecting the separation state and operating the wireless module mounted on the function expansion device when detecting the approaching state. The computer program according to claim 10 .

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