JP6443932B2 - SSID and password changing system, charger, SSID and password changing method and control program - Google Patents

Description

  The present invention relates to an SSID and password change system, a charger, an SSID and password change method, and a control program for changing an SSID and password used for Wi-Fi communication.

  In wireless communication such as Wi-Fi (Wireless Fidelity) communication, a technique for automatically setting connection parameters necessary for connecting to a network is known.

  In Patent Document 1, a SSID (Service Set IDentification) code is searched from a beacon transmitted from an access point, and the content of the network connection information file is found when the searched SSID code is in the stored network connection information file. Describes a technique for setting network connection information necessary for network connection by writing as a setting value in a registry of a personal computer. The SSID is an identifier of an access point defined by the Wi-Fi communication standard.

JP 2003-204335 A

  By using the technique described in Patent Document 1, in Wi-Fi communication, a user can easily connect to a network without inputting parameters himself. In Wi-Fi communication, when a new connection is made with an access point, it is necessary to identify the access point based on the SSID and connect to the login wirelessly using an encryption key or a password (hereinafter collectively referred to as a password). However, since the SSID and password are not automatically changed, the SSID and password are not changed unless the user changes the SSID and password, and there is a problem that the SSID and password are vulnerable to a password analysis attack from a third party. is there. In addition, when changing the SSID and password, it is necessary to consider that it is difficult for a third party to intercept the SSID and password.

  The present invention has been made in view of the above background, and provides a high-security Wi-Fi communication SSID and password change system, charger, SSID and password change method, and control program without burden on the user. With the goal.

  The present invention is an SSID password change system for changing an SSID and a password used for Wi-Fi communication, and is capable of USB connection and a portable communication terminal capable of USB connection and Wi-Fi communication with the portable communication terminal. A mobile router; a USB communication terminal having a USB connection terminal; and a charger for charging the mobile router; and the charger includes an SSID password generation unit for newly generating an SSID and a password. And the charger transmits the newly generated SSID and password to the portable communication terminal and the mobile router that are connected via USB via USB communication, and the newly generated SSID is transmitted to the portable communication terminal and the mobile router. And password set to SSID and password used for Wi-Fi communication Is shall.

  Further, the present invention is a portable communication terminal having a USB connection terminal and capable of USB connection, and a charger for charging a mobile router capable of USB connection through Wi-Fi communication with the portable communication terminal, wherein the portable communication terminal A USB communication control unit that controls USB communication with a terminal and the mobile router; and an SSID password generation unit that newly generates an SSID and a password used for Wi-Fi communication, the mobile communication terminal and the mobile When at least one device of the router is connected to the USB connection terminal, the USB communication control unit transmits the generated SSID and password to the connected device by USB communication.

  Furthermore, the present invention has a USB connection terminal for changing the SSID and password of a portable communication terminal capable of USB connection and a mobile router capable of USB connection through Wi-Fi communication with the portable communication terminal. A method for changing an SSID password using a charger capable of charging the connected mobile communication terminal and the mobile router and generating a new SSID and password, wherein the SSID and password are newly set in the charger. In the charger, in the charger, the step of transmitting the newly generated SSID and password to the mobile communication terminal and the mobile router connected via USB by USB communication, and in the mobile communication terminal and the mobile router, Wi-F with newly generated SSID and password And setting the SSID and the password used for communication, but with a.

  Furthermore, the present invention provides a portable communication terminal capable of USB connection, a mobile router capable of Wi-Fi communication with the portable communication terminal and capable of USB connection, the portable communication terminal having a USB connection terminal and connected by USB, and A control program for an SSID password change system for changing the SSID and password used for Wi-Fi communication, comprising a charger capable of charging the mobile router and generating a new SSID and password, A step of newly generating an SSID and a password in the charger; and a step of transmitting the newly generated SSID and password to the portable communication terminal and the mobile router that are USB-connected in the charger by USB communication; In the mobile communication terminal and the mobile router, the And setting the SSID and the password using the valley generated SSID and the password to a Wi-Fi communication, is intended to execute on a computer.

  According to the present invention, it is possible to provide an SSID and password change system for Wi-Fi communication that has high security without a burden on the user.

It is a figure explaining the outline | summary of this invention. It is a block diagram which shows schematic structure of the USB charger in the SSID password change system concerning this Embodiment. It is a block diagram which shows schematic structure of the mobile router in the SSID password change system concerning this Embodiment. It is a block diagram which shows schematic structure of the smart phone / tablet in the SSID password change system concerning this Embodiment. It is a flowchart which shows the flow of the process which switches the classification of a power supply by SDP and DCP in the USB communication / charge switching part and USB communication / charge switching part of a USB charger. It is a flowchart which shows the flow of the process which switches the classification of a power supply by SDP and DCP in the USB communication / charge switching part of a mobile router. It is a flowchart which shows the flow of the process which changes SSID and a password in a SSID and password change system (process on the mobile router side). It is a flowchart which shows the flow of the process which changes SSID and a password in a SSID and password change system (process on the smart phone / tablet side). It is a flowchart which shows the flow of the process which changes SSID and a password in a SSID and password change system (exchange between a mobile router and a smart phone / tablet). 6 is a flowchart showing a flow of processing for storing contents of USB transmission data transmitted from a charger in a mobile router. It is a flowchart which shows the flow of the process which stores the content of the USB transmission text file transmitted from the charger in a smart phone / tablet. The usage index storage unit, the Wi-Fi_initial SSID password storage unit, and the Wi-Fi_No. It is a figure which shows an example (storage part input condition example 1) of the input condition of a n_index new SSID password storage part (n = 1-5). It is a figure which shows an example of the format of the USB transmission data in USB communication between a USB charger and a mobile router. It is a figure which shows an example of the format of the USB transmission text file in USB communication between a USB charger and a smart phone / tablet. Mobile router and smartphone / tablet use index storage, Wi-Fi_initial SSID password storage, and Wi-Fi_No. It is a figure which shows an example (storage part input condition example 2) of the input condition of a n_index new SSID password storage part (n = 1-5).

[Features of the present invention]
Prior to the description of the embodiments of the present invention, an outline of the features of the present invention will be described first.

  FIG. 1 is a diagram for explaining the outline of the present invention. As shown in FIG. 1, an SSID password changing system 500 for changing an SSID and a password used for Wi-Fi communication according to the present invention includes a mobile communication terminal 510, a mobile router 520, and a charger 530. ing.

  The portable communication terminal 510 is capable of USB (Universal Serial Bus) connection. The mobile router 520 performs Wi-Fi communication with the mobile communication terminal 510 and can be connected by USB. The charger 530 has a USB connection terminal 531 and charges the portable communication terminal 510 and the mobile router 520 connected by USB. In addition, the charger 530 includes an SSID password generation unit 532 that newly generates an SSID and a password.

  The charger 530 transmits the newly generated SSID and password to the USB-connected mobile communication terminal 510 and the mobile router 520 by USB communication, and the mobile communication terminal 510 and the mobile router 520 transmit the newly generated SSID and password. Set to SSID and password used for Wi-Fi communication.

  Accordingly, it is possible to provide a Wi-Fi communication SSID and password change system with high security without burden on the user.

[Embodiment]
Embodiments of the present invention will be described below with reference to the drawings.
First, the configuration of the SSID and password change system 400 for Wi-Fi communication according to the present embodiment will be described. The SSID and password change system 400 includes a USB charger 100, a mobile router 200, and a smartphone / tablet 300. The USB charger 100 and the mobile router 200 can be connected by USB. The USB charger 100 and the smartphone / tablet 300 can be connected by USB. The smartphone / tablet 300 is a mobile communication terminal, and includes a notebook PC, a game device, an audio device, and the like that can be charged via a USB connection in addition to a smartphone or a tablet. . The USB has four lines including two signal lines (D + and D−), a power supply line (Vbus), and a ground line (GND). A voltage of 5 V with reference to GND is applied to Vbus.

  FIG. 2 is a block diagram illustrating a schematic configuration of the USB charger 100. As shown in FIG. 2, the USB charger 100 includes a timer unit 1, a Wi-Fi_index new SSID password generation unit 2, a text file generation unit 3, a USB communication control unit 104, and a USB communication / charge switching unit 4. And a USB communication / charge switching unit 5, a 5V regulator 6, an AC / DC converter circuit 7, a 100V plug 8, a USB plug 9, a USB plug 10, and a USB charger overall control unit 80. .

  The timer unit 1 generates a pulse when a certain time elapses. The Wi-Fi_index new SSID password generation unit 2 counts up an index (index) when a pulse signal is received from the timer unit 1, and newly generates an SSID and password for Wi-Fi communication.

  The text file generation unit 3 generates a text file (USB text file) from the USB transmission data including the index, SSID, and password generated by the Wi-Fi_index new SSID password generation unit 2. The USB communication control unit 104 has a USB host function, and controls USB communication with the mobile router 200 and USB communication with the smartphone / tablet 300. Smartphones / tablets generally support only text file and image file exchange in USB communication. Even in such a smartphone / tablet, by converting the USB transmission data including the index, the SSID and the password generated by the Wi-Fi_index new SSID password generation unit 2 into the USB transmission text file by the text file generation unit 3, the SSID and Password exchange can be performed via USB communication.

  The USB communication / charge switching unit 4 and the USB communication / charge switching unit 5 switch the type of power supply between SDP (Standard Downstream Port) and DCP (Dedicated Charging Port), thereby enabling USB communication and 1.5A charging. Switch. When a USB device such as a mobile router or a smartphone / tablet is connected to the USB communication / charge switching unit 4 and the USB communication / charge switching unit 5, first, a 5V voltage is applied to the USB and the USB communication control unit 104 is connected via the USB communication control unit 104. Start communication. When the USB communication is completed, the application of the 5V voltage to the USB is once stopped, and the D + and D− of the USB are short-circuited. After 2 seconds, 5V voltage is applied to the USB again to charge the mobile router and smartphone / tablet. The flow of processing for switching the type of power supply between SDP and DCP in USB communication / charge switching unit 4 and USB communication / charge switching unit 5 will be described later.

  The 5V regulator 6 supplies power to the entire USB charger 100 and supplies a predetermined current to the USB 5V line. The AC / DC conversion circuit 7 converts an AC current of 100V into a DC current of 5V and sends it to the 5V regulator 6. The 100V plug 8 is inserted into a household outlet and supplies 100V to the AC / DC converter circuit 7 from the outlet. The USB plug 9 connects the USB from the USB communication / charge switching unit 4. The USB plug 10 is a plug for connecting a USB compatible device, has two signal terminals (D + and D−), a power supply terminal (Vbus), and a ground terminal (GND), and is used for USB communication / charging. It is connected to the switching unit 5. The USB charger overall control unit 80 controls the overall operation of the USB charger 100.

  FIG. 3 is a block diagram illustrating a schematic configuration of the mobile router 200. The mobile router 200 includes a USB connector 11, a rechargeable battery 12, a charging circuit unit 13, a 5V application determination circuit 14, a USB communication / charge switching unit 15, a mobile router USB_ID storage unit 16, and a USB communication control unit 17. A nonvolatile memory 18, a control program 19, a Wi-Fi initial SSID password storage unit 20, a use index storage unit 26, a Wi-Fi antenna 27, a Wi-Fi transmission / reception unit 28, and a Wi-Fi control unit. 29, a mobile communication antenna 30, a mobile communication transmitting / receiving unit 31, a mobile communication control unit 32, and an SSID password switching control unit 81.

  In addition, the mobile router 200 has a Wi-Fi_No. 1_index new SSID password storage unit 21, Wi-Fi_No. 2_index new SSID password storage unit 22, Wi-Fi_No. 3_index new SSID password storage unit 23, Wi-Fi_No. 4_index new SSID password storage unit 24 and Wi-Fi_No. 5_index new SSID password storage unit 25 (hereinafter referred to as “Wi-Fi_No.1_index new SSID password storage unit 21 to Wi-Fi_No.5_index new SSID password storage unit 25” or “Wi-Fi_No.n_index new SSID password of mobile router 200”. A storage unit (described as n = 1 to 5) ”is provided.

  The USB connector 11 is a terminal for connecting to the USB plug 9 of the USB charger 100. The rechargeable battery 12 can supply power to the entire mobile router, and is charged by being supplied with current by the charging circuit unit 13. The charging circuit unit 13 is supplied with 5V voltage from the charger 100 via the USB connector 11 and charges the rechargeable battery 12. The 5V application determination circuit 14 determines whether a 5V voltage is applied from the charger 100 via the USB connector 11.

  The USB communication / charge switching unit 15 includes a D + / D− short-circuit determination circuit that determines whether or not D + and D−, which are USB data lines, are short-circuited, and a USB communication circuit for USB communication. The USB communication / charge switching unit 15 determines whether or not the USB data lines D + and D− are short-circuited by the D + / D− short-circuit determination circuit, and switches between USB communication and 1.5A charging. .

  The mobile router USB_ID storage unit 16 stores the USB_ID of the mobile router 200 that notifies the USB charger 100 by USB communication via the USB connector 11. The USB communication control unit 17 performs USB communication with the USB communication control unit 104 of the USB charger. The nonvolatile memory 18 stores programs and data in the mobile router. The control program 19 is stored in a nonvolatile memory and controls Wi-Fi, USB, and mobile communication.

  The Wi-Fi initial SSID password storage unit 20 stores initial values of SSIDs and passwords used during Wi-Fi communication. Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. The 5_index new SSID password storage unit 25 associates the SSID and password used during Wi-Fi communication (already defined or unique one newly generated by the Wi-Fi_index new SSID password generation unit 2) with the index. Store.

  Also, the index, SSID, and password of the USB transmission data transmitted from the charger 100 are Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. 5_index stored in one of the new SSID password storage units 25. Details of the storing process will be described later.

  The used index storage unit 26 records an index corresponding to the SSID and password used in Wi-Fi communication. The Wi-Fi antenna 27 transmits and receives Wi-Fi communication radio waves. The Wi-Fi transmission / reception unit 28 transmits / receives a signal to / from the Wi-Fi antenna 27.

  The Wi-Fi control unit 29 includes the Wi-Fi initial SSID password storage unit 20 and the Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. Wi-Fi communication is performed using the SSID and password stored in any of the 5_index new SSID password storage unit 25. The mobile communication antenna 30 transmits and receives radio waves for mobile communication of a base station 82 that can be connected to the Internet. The mobile communication transmitting / receiving unit 31 can transmit and receive signals to and from the mobile communication antenna 30. The mobile communication control unit 32 performs mobile communication at the mobile communication transmission / reception unit 31. The SSID password switching control unit 81 controls switching of the SSID and password. Details of a specific SSID and password switching process by the SSID password switching control unit 81 will be described later.

  FIG. 4 is a block diagram illustrating a schematic configuration of the smartphone / tablet 300. As shown in FIG. 4, the smartphone / tablet 300 includes a USB connector 33, a charging circuit unit 34, a 5V application determination circuit 35, a USB communication / charge switching unit 36, a rechargeable battery 37, and a smartphone / tablet USB_ID storage. Unit 38, USB communication control unit 39, nonvolatile memory 40, control program 41, used index storage unit 42, Wi-Fi initial SSID password storage unit 43, Wi-Fi antenna 49, and Wi-Fi transmission / reception Unit 50, Wi-Fi control unit 51, and text storage unit 52.

  In addition, the smartphone / tablet 300 includes a Wi-Fi_No. 1_index new SSID password storage unit 44, Wi-Fi_No. 2_index new SSID password storage unit 45, Wi-Fi_No. 3_index new SSID password storage unit 46, Wi-Fi_No. 4_index new SSID password storage 47 and Wi-Fi_No. 5_index new SSID password storage unit 48 (hereinafter referred to as “Wi-Fi_No.1_index new SSID password storage unit 44 to Wi-Fi_No.5_index new SSID password storage unit 48” or “Wi-Fi_No.n_index new SSID of smartphone / tablet 300”. A password storage unit (described as “n = 1 to 5”).

  The USB connector 33 can be connected to the USB plug 10. The rechargeable battery 37 can supply power to the entire mobile router, and is charged by being supplied with current by the charging circuit unit 34. The charging circuit unit 34 is supplied with 5V voltage from the charger 100 via the USB connector 33 and charges the rechargeable battery 37. The 5V application determination circuit 35 determines whether a 5V voltage is applied from the charger 100 via the USB connector 33.

  The USB communication / charge switching unit 36 includes a D + / D− short-circuit determination circuit that determines whether or not D + and D−, which are USB data lines, are short-circuited, and a USB communication circuit for USB communication. The USB communication / charge switching unit 36 determines whether or not the USB data lines D + and D− are short-circuited by the D + / D− short-circuit determination circuit, and switches between USB communication and 1.5A charging. .

  The smartphone / tablet USB_ID storage unit 38 stores the USB_ID of the mobile router that notifies the USB charger 100 by USB communication via the USB connector 33. The USB communication control unit 39 performs USB communication with the USB communication control unit 104 of the USB charger. The nonvolatile memory 40 stores programs and data in the smartphone / tablet. The control program 41 is stored in the non-volatile memory and controls Wi-Fi, USB, and mobile communication.

  The Wi-Fi initial SSID password storage unit 43 stores an initial SSID and password used during Wi-Fi communication. Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. The 5_index new SSID password storage unit 48 corresponds to the second storage unit, and is used for Wi-Fi communication. SSID and password (one already defined or unique generated by the Wi-Fi_index new SSID password generation unit 2) Stored in association with the index.

  Also, the index, SSID, and password of the USB transmission text file transmitted from the charger 100 are Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index stored in one of the new SSID password storage units 48. Details of the storing process will be described later.

  The used index storage unit 42 records an index corresponding to the SSID and password used in Wi-Fi communication. The Wi-Fi antenna 49 transmits and receives Wi-Fi radio waves. The Wi-Fi transmission / reception unit 50 transmits / receives a signal to / from the Wi-Fi antenna 49.

  The Wi-Fi control unit 51 includes a Wi-Fi initial SSID password storage unit 43 and a Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. Wi-Fi communication is performed using any of the 5_index new SSID password storage unit 48. The text storage unit 52 stores the text file transmitted from the USB charger 100.

  USB BC1.1, which is a specification for regulating charging using USB, defines three types of power sources: CDP (Charging Downstream Port), SDP (Standard Downstream Port), and DCP (Dedicated Charging Port). ing. When the power supply type is CDP, USB communication can be performed together with charging, and the maximum charging current is 1.5A. When the power supply type is SDP, USB communication can be performed along with charging, but the maximum charging current is 0.5A. When the power supply type is DCP, USB communication is not possible, but the maximum charging current is 1.5A. The DCP is identified by whether or not the USB data lines D + and D− are short-circuited. The USB charger 100 can switch the type of power supply between SDP and DCP by the USB communication / charge switching unit 4 and the USB communication / charge switching unit 5.

The flow of processing for switching the power source type between SDP and DCP in the USB communication / charge switching unit 4 and the USB communication / charge switching unit 5 will be described below.
FIG. 5 is a flowchart showing a flow of processing for switching the type of power source between SDP and DCP in the USB communication / charge switching unit 4 and the USB communication / charge switching unit 5. In the following description, FIGS. 2, 3 and 4 will be referred to as appropriate. As shown in FIG. 5, first, the USB charging method is set to SDP and connected to the communication circuit (step S1).

  Following step S1, a 5V voltage is applied to the USB (step S2), and the connection of the USB device is monitored (step S3). When the USB device is connected, communication setting is performed (step S4), and USB communication is performed (step S5). When the USB communication is completed (step S6), 5V application is stopped (step S7).

  Following step S7, the USB charging method is set to DCP, and the USB data lines D + and D- are short-circuited (step S8). Next, 5V voltage is applied (step S9), and it waits for 10 minutes (step S10). After 10 minutes have passed in step S10, the application of 5V voltage is stopped (step S11), and the process returns to step S1. The processing from step S1 to step S11 is repeated.

  Many smartphones / tablets support SDP and DCP but do not support CDP. Even in such a smartphone / tablet, the charger 100 includes the USB communication / charge switching unit 4 and the USB communication / charge switching unit 5, so that USB communication necessary for exchange of the SSID and password can be performed during charging. At the same time, after the USB communication is completed, the time required for charging can be shortened by switching the charging current to 1.5 A.

The flow of processing for switching the power source type between SDP and DCP in the USB communication / charge switching unit 15 of the mobile router 200 and the USB communication / charge switching unit 36 of the smartphone / tablet 300 will be described below. The USB communication / charge switching unit 15 and the USB communication / charge switching unit 36 have the same processing flow, and therefore the USB communication / charge switching unit 15 will be described.
FIG. 6 is a flowchart showing a flow of processing for switching the type of power source between SDP and DCP in the USB communication / charge switching unit 15. In the following description, FIGS. 2, 3 and 4 will be referred to as appropriate. As shown in FIG. 6, first, it is monitored that the 5V voltage is detected by the 5V application determination circuit 14 (step S13), and when the 5V voltage is detected, the D + / D-short determination of the USB communication / charge switching unit 15 is performed. It is determined whether the USB device (the charger 100 in this case) connected to the USB connector 11 by a circuit is DCP or SDP (step S14). If it is determined in step S14 that the USB device is SDP, the USB communication / charge switching unit 15 sets the charging current of the charging circuit unit 13 to 0.5 A (step S15), and the USB communication / charge switching unit 15 is turned on. The USB communication is performed by operating the USB communication circuit (step S16). When the USB communication is completed (step S17) and the 5V voltage is not detected by the 5V application determination circuit 14 (step S18), the process returns to step S13.

  If it is determined in step S14 that the USB device is DCP, the USB communication / charge switching unit 15 sets the charging current of the charging circuit unit 13 to 1.5 A (step S19), and the 5V application determination circuit 14 sets the 5V voltage. Is no longer detected (step S18), the process returns to step S13.

  In the description of the flow of processing for switching between USB communication and charging in the USB communication / charge switching unit 15 described above, the USB communication / charge switching unit 15 is replaced with the USB communication / charge switching unit 36, and the 5V application determination circuit 14 is replaced with If the USB connector 11 is replaced with the USB connector 33 and the charging circuit unit 13 is replaced with the charging circuit unit 34 in the 5V application determination circuit 35, the USB communication / charge switching unit 36 switches the power source type between SDP and DCP. It becomes.

Next, an operation for changing the SSID and password in the SSID and password change system 400 for Wi-Fi communication will be described below. In the following description, FIGS. 2, 3 and 4 will be referred to as appropriate.
When the user connects the 100V plug 8 of the USB charger 100 to a 100V outlet, power is supplied to each block of the USB charger 100 via the AC / DC converter circuit 7 and the 5V regulator 6. Immediately after power is supplied to each block of the USB charger 100, the Wi-Fi_index new SSID password generation unit 2 increments the index and generates a unique SSID and password for Wi-Fi communication.

  The timer unit 1 generates a pulse signal every time a fixed time (for example, 24 hours) elapses. When this pulse signal is transmitted to the Wi-Fi_index new SSID password generation unit 2, the Wi-Fi_index new SSID password generation unit 2 increments the index value by 1, and a unique SSID and password for Wi-Fi communication. Is generated. For example, when the initial value of the password is abspftua, all the characters of the password are changed to the next character in the ABC order to be bctqguxb. The SSID is also generated in the same way as the password.

  The index, SSID, and password generated by the Wi-Fi_index new SSID password generation unit 2 are transmitted to the mobile router 200 and the smartphone / tablet 300 by USB communication by the USB communication control unit 104 of the USB charger 100. When transmitting to the smartphone / tablet 300, USB transmission data composed of the index, SSID and password generated by the Wi-Fi_index new SSID password generation unit 2 is converted into a text file (USB transmission text file) in the text file generation unit 3. Send it after converting to.

  For example, it is assumed that the Wi-Fi_index new SSID password generation unit 2 generates index = 2, SSID = bctqguxb, and password = edfgs458458gt. At this time, when the USB connector 11 of the mobile router 200 is connected to the USB plug 9 of the USB charger 100, the USB communication / charge switching unit 4 of the USB charger 100 applies 5V voltage and the USB communication circuit side Works with. The 5V application determination circuit 14 of the mobile router 200 detects application of 5V voltage by the charger 100. The D + / D− short determination circuit of the USB communication / charge switching unit 15 determines that the USB data lines D + and D− are not short-circuited. Thereby, USB communication is started.

  After starting the USB communication, the USB charger 100 is notified of the value of the USB_ID stored in the USB_ID storage unit 16 of the mobile router 200. Thereby, the charger 100 can recognize that the mobile router 200 is connected by USB. In the mobile router 200, the index, the SSID, and the password transmitted from the charger 100 by USB communication are the Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. 5_index stored in one of the new SSID password storage units 25. The transmitted index, SSID, and password are stored in the Wi-Fi_No. Among the n_index new SSID password storage units (n = 1 to 5), if there is anything that has not been input, it is stored in the smallest number of n. Also, the transmitted index, SSID and password are stored in the Wi-Fi_No. If there is no n_index new SSID password storage unit (n = 1 to 5) for which nothing is input, the value of the index stored in the used index storage unit 26 in which no index is used is Stored (overwritten) in the smallest one. For example, the Wi-Fi_No. If there is no input in any of the n_index new SSID password storage units (n = 1 to 5), the index, SSID and password transmitted from the charger 100 will be Wi-Fi_No. 1_index is stored in the new SSID password storage unit 21.

  When the necessary USB communication is completed, the USB communication / charge switching unit 4 temporarily stops the application of the 5V voltage, short-circuits the USB data lines D + and D−, and applies the 5V voltage again. Application of 5V voltage is detected in the 5V application determination circuit 14 of the mobile router 200, and D + and D− which are USB data lines are short-circuited in the D + / D− short determination circuit of the USB communication / charge switching unit 15. After it is determined that the charging circuit unit 13 is charging, the charging circuit unit 13 starts 1.5 A charging.

  When the USB connector 33 of the smartphone / tablet 300 is connected to the USB plug 10 of the USB charger 100, in the USB charger 100, the USB communication / charge switching unit 5 applies 5V voltage and operates on the USB communication circuit side. The 5V application determination circuit 35 of the smartphone / tablet 300 detects the application of the 5V voltage by the charger 100, and the D + / D− short determination circuit of the USB communication / charge switching unit 36 detects the USB data lines D + and D−. Are not short-circuited, and USB communication is started.

  After the start of USB communication, the USB charger 100 is notified of the value of USB_ID stored in the USB_ID storage unit 38 of the smartphone / tablet 300. Thereby, the charger 100 can recognize that the USB connection is the smartphone / tablet 300. In the smartphone / tablet 300, a text file having an index, an SSID, and a password transmitted from the charger 100 through USB communication is stored in the text storage unit 52. Index, SSID, and password are extracted from this text file, and Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index is stored in one of the new SSID password storage units 48. The extracted index, SSID, and password are stored in the Wi-Fi_No. If there is an n_index new SSID password storage unit (n = 1 to 5) where nothing is input, the index, SSID and password are stored in the one with the smallest index value stored therein. The The extracted index, SSID, and password are stored in the Wi-Fi_No. If there is no n_index new SSID password storage unit (n = 1 to 5) that has not been input, the used index storage unit 42 has the smallest n number among those in which no index is used. Stored (overwritten). For example, the Wi-Fi_No. If no entry is made in any of the n_index new SSID password storage units (n = 1 to 5), Wi-Fi_No. 1_index is stored in the new SSID password storage unit 44.

  When the necessary USB communication is completed, the USB communication / charge switching unit 5 temporarily stops the application of the 5V voltage, short-circuits the USB data lines D + and D−, and applies the 5V voltage again. Application of 5V voltage is detected in the 5V application determination circuit 35 of the mobile router 200, and D + and D− which are USB data lines are short-circuited in the D + / D− short determination circuit of the USB communication / charge switching unit 36. After it is determined that the charging circuit unit 34 is charging, the charging circuit unit 34 starts 1.5A charging.

  The Wi-Fi initial SSID password storage unit 20 of the mobile router 200 and the Wi-Fi initial SSID password storage unit 43 of the smartphone / tablet 300 have the same SSID and password. Therefore, in the mobile router 200, when the index value is not input to the use index storage unit 26, the mobile router 200 uses the SSID and password stored in the Wi-Fi initial SSID password storage unit 20, The smartphone / tablet 300 performs Wi-Fi communication by using the Wi-Fi initial SSID password storage unit 43. The smartphone / tablet 300 also performs Wi-Fi communication using the Wi-Fi initial SSID password storage unit 43.

  In Wi-Fi communication, the mobile router 200 is connected to the smartphone / tablet 300 with respect to the Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index Inquires about the index stored in the new SSID password storage unit 48. In response to this inquiry, the smartphone / tablet 300 uses Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index The mobile router 200 is notified of the index stored in the new SSID password storage unit 48 by Wi-Fi communication. In addition, since only the index is notified through Wi-Fi communication, the risk that an SSID and a password are intercepted by a third party is extremely low.

  For example, index = 2 newly generated by the Wi-Fi_index new SSID password generation unit 2, SSID = bctqguxb, and password = eddfs458ifgt are Wi-Fi_No. It is assumed that 1_index is stored in the new SSID password storage unit 44. In addition, Wi-Fi_No. 2_index new SSID password storage unit 45 to Wi-Fi_No. Assume that nothing is entered in the 5_index new SSID password storage unit 48. In Wi-Fi communication, the smartphone / tablet 300 notifies the mobile router 200 of index = 2.

  In the mobile router 200, the index notified from the smartphone / tablet 300 and the Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. 5_index The index stored in the new SSID password storage unit 25 is collated. For example, index = 2 newly generated by the Wi-Fi_index new SSID password generation unit 2, SSID = bctqguxb, password = edfgs 458ifgt is the Wi-Fi_No. It is assumed that 1_index is also stored in the new SSID password storage unit 21. The index (= 2) notified from the smartphone / tablet 300 and the Wi-Fi_No. 1_index Since it matches the index (= 2) stored in the new SSID password storage unit 21, the mobile router 200 transmits a command for switching to the SSID and password of index = 2 to the smartphone / tablet 300.

  The smartphone / tablet 300 that has received this command transmits a response of switching consent to the mobile router 200. Then, the smartphone / tablet 300 switches the SSID and password used for Wi-Fi communication to an SSID (= bctqguxb) and a password (= edfgs458458gt) corresponding to index = 2. After the mobile router 200 receives the switching approval response from the smartphone / tablet 300, the SSID and password used for Wi-Fi communication are set to SSID (= bctqguxb) and password (= edfgs458fgt) corresponding to index = 2. Switch to.

  As described above, the user can periodically change the SSID and password by daily charging work without intentionally changing the SSID and password. In addition, since the exchange of the SSID and password between the charger 100 and the mobile router 200 and between the charger 100 and the smartphone / tablet 300 is performed only by wired communication, a third party is required when changing the SSID and password. It is difficult to intercept SSID and password. Accordingly, it is possible to provide a Wi-Fi communication SSID and password change system with high security without burden on the user.

A flow of processing for changing the SSID and password in the SSID and password change system 400 of Wi-Fi communication will be described below.
7, 8, and 9 are flowcharts showing the flow of processing for changing the SSID and password in the SSID and password change system 400. FIG. 7 shows a processing flow on the mobile router 200 side. FIG. 8 shows a processing flow on the smartphone / tablet 300 side. FIG. 9 shows a processing flow for the exchange between the mobile router 200 and the smartphone / tablet 300. In the following description, FIGS. 2, 3 and 4 will be referred to as appropriate.

  Regarding the processing flow on the mobile router 200 side, as shown in FIG. 7, it is first determined whether or not an index is stored in the used index storage unit 26 (step S101). If the index is stored in the used index storage unit 26 in step S101, the Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. 5_index Extracts the SSID and password corresponding to the index stored in the used index storage unit 26 from the SSID and password stored in the new SSID password storage unit 25, and uses the SSID and password to perform Wi -Fi communication is operated (step S102), and Wi-Fi communication is started with the smartphone / tablet 300 (step S105).

  If no index is stored in the used index storage unit 26 in step S101, Wi-Fi communication is operated using the SSID and password stored in the Wi-Fi initial SSID password storage unit 20 (step S103), and the used index is stored. The initial value (index = 1) is stored in the storage unit 26 (step S104), and Wi-Fi communication with the smartphone / tablet 300 is started (step S105).

  Subsequent to step S105, the SSID password switching control unit 81 determines whether the Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index An index inquiry command for inquiring about the index stored in the new SSID password storage unit 48 is transmitted (step S106).

  Following step S106, the SSID password switching control unit 81 monitors whether a response from the smartphone / tablet 300 has been received (step 107). Note that the response is Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index When the index is stored in the new SSID password storage unit 48, the value of the index is stored, and when it is not stored, this is a notification to that effect.

  Subsequent to step S107, the SSID password switching control unit 81 performs Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. 5_index The index stored in the new SSID password storage unit 25 is collated with the index notified from the smartphone / tablet 300 (step S108), and Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. It is determined whether or not any index stored in the 5_index new SSID password storage unit 25 matches the index notified from the smartphone / tablet 300 (step S109).

  If it is determined in step S109 that there is a matching index, the matching index having the largest value (here, index = B) is extracted (step S110). If it is determined in step S109 that there is no matching index, a command is sent to the smartphone / tablet 300 to end the process without switching the SSID and password settings used for Wi-Fi (step S115). The process ends without switching the setting of the SSID and password used for Wi-Fi communication.

  Following step S110, it is determined whether the extracted index is larger than the index stored in the used index storage unit 26 (here, index = A) (step S111). If it is determined that the index extracted in step S111 for SSID and password cut to the smartphone / tablet 300 is larger than the index stored in the used index storage unit 26 (B> A), an SSID and password switching command is transmitted (step S112). ). Specifically, the SSID and password switching command instructs to switch the setting of the SSID and password used in Wi-Fi communication to the SSID and password corresponding to the index (index = B) extracted in step S111. It is.

  When it is determined that the index extracted in step S111 is not larger than the index stored in the used index storage unit 26 (B ≦ A), the setting of the SSID and password used for Wi-Fi is switched to the smartphone / tablet 300. A command to end the process is transmitted (step S115), and the process ends without switching the setting of the SSID and password used for Wi-Fi communication.

  Subsequent to step S112, when the SSID password switching control unit 81 receives an approval response to approve switching from the smartphone / tablet 300 to the SSID and password, the SSID password switching control unit 81 switches to the SSID and password corresponding to the extracted index (step S113). . Subsequent to step S113, the index extracted in step S110 is stored in the used index storage unit 26 (step S114), and the process ends.

  Regarding the processing flow on the smartphone / tablet 300 side, as shown in FIG. 8, it is first determined whether or not an index is stored in the used index storage unit 42 (step S201). If the index is stored in the used index storage unit 42 in step S201, the Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index Extracts the SSID and password corresponding to the index stored in the used index storage unit 42 from the SSID and password stored in the new SSID password storage unit 48, and uses the SSID and password to perform Wi -Fi communication is operated (step S202), and Wi-Fi communication is started with the mobile router 200 (step S205).

  If the index is not stored in the used index storage unit 42 in step S201, Wi-Fi communication is operated using the SSID and password stored in the Wi-Fi initial SSID password storage unit 43 (step S203), and the used index is stored. The initial value (index = 1) is stored in the storage unit 43 (step S204), and Wi-Fi communication with the mobile router 200 is started (step S205).

  Subsequent to step S205, the mobile router 200 transmits Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index Whether or not an inquiry about the index stored in the new SSID password storage unit 48 has been received is monitored (step S206). When an inquiry is received in step S206, a response is transmitted to the mobile router 200 (step S207). As described above, the response includes Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index When the index is stored in the new SSID password storage unit 48, the value of the index is stored, and when it is not stored, this is a notification to that effect.

  Following step S207, it is monitored whether an SSID and password switching command has been received (step S208). When the SSID and password switching command is received in step S208, an approval response is transmitted to the mobile router 200 (step S209), and the SSID and password corresponding to the index specified by the SSID and password switching command are switched (step S210). . Subsequent to step S210, the index specified by the SSID and password switching command is stored in the used index storage unit 42 (step S211), and the process is terminated.

  If the SSID and password switching command is not received in step S208, it is monitored whether or not a command for ending the processing without switching the SSID and password setting used for Wi-Fi from the mobile router 200 is received (step S212). If the mobile router 200 receives a command to end the process without switching the SSID and password used for Wi-Fi from the mobile router 200, the process is performed without switching the setting of the SSID and password used for Wi-Fi communication. Exit. If it is determined in step S212 that the command to end the process is not received from the mobile router 200 without switching the setting of the SSID and password used for Wi-Fi, the process returns to step S208.

  Regarding the processing flow of the exchange between the mobile router 200 and the smartphone / tablet 300, first, as shown in FIG. 9, an index inquiry command is transmitted from the mobile router 200 to the smartphone / tablet 300 (step S301). Note that the processing in step S301 corresponds to the processing in step S106 in FIG. Subsequently, a response is transmitted from the smartphone / tablet 300 to the mobile router 200 (step S302). Note that the processing in step S302 corresponds to the processing in step S207 in FIG.

  Subsequent to step S302, the mobile router 200 transmits an SSID and password switching command to the smartphone / tablet 300 (step S303). Note that the processing in step S303 corresponds to the processing in step S112 in FIG. Subsequently, an approval response is transmitted from the smartphone / tablet 300 to the mobile router 200 (step S304). Note that the processing in step S304 corresponds to the processing in step S209 in FIG. As described above, the switching of the setting of the SSID and password used for Wi-Fi communication in the mobile router 200 and the smartphone / tablet 300 is completed.

  FIG. 10 is a flowchart showing a flow of processing for storing the content of USB transmission data transmitted from the charger 100 in the mobile router 200. As shown in FIG. 10, first, it is determined whether or not the index of the USB transmission data matches the index of the used index storage unit 26 (step S401). If it is determined in step S401 that they do not match, Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. 5_index The process ends without updating the data in the new SSID password storage unit 25.

  If it is determined in step S401 that the IDs match, the index of the USB transmission data matches any of the indexes stored in the Wi-Fi_No.n new ssid_index storage unit (n = 1 to 5) of the mobile router 200. It is determined whether or not (step S402). If it is determined in step S402 that they do not match, Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. 5_index The process ends without updating the data in the new SSID password storage unit 25.

  If it is determined in step S402 that they do not match, Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. It is determined whether it has been input to any of the 5_index new SSID password storage units 25 (step S403). In step S403, Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. 5_index If it is determined that the new SSID password storage unit 25 has input the Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. Of the 5_index new SSID password storage unit 25, the one with the smallest stored index value is overwritten with the index, SSID, and password of the USB transmission data (step S404), and the process ends.

  In step S403, Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. 5_index If it is determined that there is a new SSID password storage unit 25 that has not been entered, the Wi-Fi_No. 1_index new SSID password storage unit 21 to Wi-Fi_No. The index, SSID, and password of the USB transmission data are written in the 5_index new SSID password storage unit 25 that has not been input and the value of n is the smallest (step S405), and the process ends.

  FIG. 11 is a flowchart showing the flow of processing for storing the content of the USB transmission text file transmitted from the charger 100 in the smartphone / tablet 300. This process is basically the same as the process shown in FIG. As shown in FIG. 11, first, it is determined whether or not the index of the USB transmission text file matches the index of the used index storage unit 42 (step S501). If it is determined in step S501 that they do not match, Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index The process ends without updating the data in the new SSID password storage unit 48.

  If it is determined in step S501 that they match, the USB transmission text file index and Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. It is determined whether any of the indexes stored in the 5_index new SSID password storage unit 48 matches (step S502). If it is determined in step S502 that they do not match, Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index The process ends without updating the data in the new SSID password storage unit 48.

  If it is determined in step S502 that they do not match, Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. It is determined whether or not it has been input to any of the 5_index new SSID password storage units 48 (step S503). In step S503, Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index If it is determined that the new SSID password storage unit 48 has input the Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. Of the 5_index new SSID password storage unit 48, the one with the smallest stored index value is overwritten with the index, SSID, and password of the USB transmission text file (step S504), and the process ends.

  In step S503, Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 5_index If it is determined that there is a new SSID password storage unit 48 that has not been input, the Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. The index, SSID, and password of the USB transmission text file are written in the 5_index new SSID password storage unit 48 that has not been input, and the value of n is the smallest (step S505), and the process is terminated.

  12 shows a usage index storage unit, a Wi-Fi_initial SSID password storage unit, and a Wi-Fi_No. It is a figure which shows an example (storage part input condition example 1) of the input condition of a n_index new SSID password storage part (n = 1-5). As shown in FIG. 12, index = 3 is stored in the used index storage unit 26 of the mobile router 200. In the Wi-Fi initial SSID password storage unit 20, SSID = AAA and password = BBB are stored in the Wi-Fi_No. 1_index new SSID password storage unit 21 includes index = 3, SSID = CCC, password = DDD, Wi-Fi_No. The 2_index new SSID password storage unit 22 stores index = 7, SSID = EEE, and password = FFF. Note that Wi-Fi_No. 3_index new SSID password storage unit 23 to Wi-Fi_No. Nothing is entered in the 5_index new SSID password storage unit 25.

  The use index storage unit 42 of the smartphone / tablet 300 stores index = 3. The Wi-Fi initial SSID_index password storage unit 20 includes SSID = AAA, password = BBB, and Wi-Fi_No. 1_index new SSID password storage unit 44 includes index = 3, SSID = CCC, password = DDD, Wi-Fi_No. 2_index new SSID password storage unit 45 includes index = 5, SSID = GGG, password = HHH, Wi-Fi_No. The 3_index new SSID password storage unit 46 stores index = 7, SSID = EEE, and password = FFF. Note that Wi-Fi_No. Nothing is entered in the 4-5_index new SSID password storage units 47-48.

  FIG. 13 is a diagram illustrating an example of a format of USB transmission data in USB communication between the USB charger 100 and the mobile router 200. As shown in FIG. 13, the contents of the USB transmission data are index = 8, SSID = bctqguxb, and password = edfgs458458gt.

  FIG. 14 is a diagram illustrating an example of a format of a USB transmission text file in USB communication between the USB charger 100 and the smartphone / tablet 300. The USB transmission text file shown in FIG. 14 is obtained by converting the USB transmission data shown in FIG. 13 into a text format file by the text file generation unit 3 (see FIG. 2). As shown in FIG. 14, the content of the USB transmission text file is the same as the USB transmission data, index = 8, SSID = bctqguxb, and password = edfgs458458gt.

  15 shows a usage index storage unit, a Wi-Fi_initial SSID password storage unit, and a Wi-Fi_No. It is a figure which shows an example (storage part input condition example 2) of the input condition of a n_index new SSID password storage part (n = 1-5). Specifically, from the storage unit input situation example 2 shown in FIG. 12, after the mobile router 200 receives the USB transmission data shown in FIG. 12, and the smartphone / tablet 300 receives the USB transmission text file shown in FIG. Indicates the input status at.

  As shown in FIG. 15, index = 3 is stored in the used index storage unit 26 of the mobile router 200. The index (= 8) of the USB transmission data (see FIG. 13) is larger than the index (= 3) stored in the used index storage unit 26. In addition, Wi-Fi_No. 1_index new SSID password storage unit 21, Wi-Fi_No. 2_index New SSID password storage unit 22 has already been input, and Wi-Fi_No. 3_index new SSID password storage unit 23 to Wi-Fi_No. Nothing is entered in the 5_index new SSID password storage unit 25. Accordingly, the index, SSID and password of the USB transmission data transmitted from the charger 100 are used as the Wi-Fi_No. Of n_index new SSID password storage units (n = 1 to 5), nothing is input (n = 3 to 5), and the n is stored in the smallest value (n = 3). As a result, Wi-Fi_No. The 3_index new SSID password storage unit 23 stores index = 8, SSID = bctqguxb, and password = edfgs458458gt.

  The use index storage unit 42 of the smartphone / tablet 300 stores index = 3. The index (= 8) of the USB transmission text file (see FIG. 14) is larger than the index (= 3) stored in the used index storage unit 42. In addition, Wi-Fi_No. 1_index new SSID password storage unit 44 to Wi-Fi_No. 3_index new SSID password storage unit 46 has already been input, and Wi-Fi_No. 4_index new SSID password storage 47, Wi-Fi_No. Nothing is entered in the 5_index new SSID password storage unit 48. Therefore, the index, SSID, and password of the USB transmission text file transmitted from the charger 100 are used as the Wi-Fi_No. The n_index new SSID password storage unit (n = 1 to 5) stores nothing (n = 4, 5) in which nothing is entered (n = 4). As a result, Wi-Fi_No. In the 4_index new SSID password storage unit 47, index = 8, SSID = bctqguxb, and password = edfgs458458 are stored.

  As described above, the user can periodically change the SSID and password by daily charging work without intentionally changing the SSID and password. In addition, since the exchange of the SSID and password between the charger 100 and the mobile router 200 and between the charger 100 and the smartphone / tablet 300 is performed only by wired communication, a third party is required when changing the SSID and password. It is difficult to intercept SSID and password. Accordingly, it is possible to provide a Wi-Fi communication SSID and password change system with high security without burden on the user.

  In the above-described embodiments, the present invention has been described as a hardware configuration, but the present invention is not limited to this. The present invention can also be realized by causing a CPU (Central Processing Unit) to execute a computer program for each process.

  In the above example, the program can be stored and provided to a computer using various types of non-transitory computer readable media. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory), and various types of temporary programs. Computer-readable media may be provided to a computer by way of example, such as electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, in the above embodiment, the USB charger has a plurality of USB plugs (two in the above embodiment), but the USB charger may have only one USB plug. In this way, the configuration of the USB charger can be simplified and the cost can be reduced. However, the burden on the user increases because the mobile router and the smartphone / tablet need to be switched.

  In the above embodiment, two USB plugs are provided in the USB charger, but three or more USB plugs may be provided. By setting it as such a structure, the same SSID and password can be set with respect to several smart phone / tablet.

  In connection with the present invention, in the Wi-Fi communication SSID and password change system according to the above-described embodiment, it is also conceivable to replace the USB charger with a wireless power supply (charger) according to the Qi standard. This wireless power feeder is the same as the USB charger in the above embodiment except that communication with the mobile router and the smartphone / tablet is performed by short-range wireless transfer such as NFC / TransferJet / infrared communication. By adopting such a configuration, it is possible to save the trouble of connecting the cable, so that the burden on the user can be further reduced. However, the security is reduced with respect to the configuration using the USB charger. If the SSID and password exchange between the wireless power feeder and the mobile router and between the wireless power feeder and the smartphone / tablet are limited to wireless communication at a very short distance, the SSID and password are transferred to a third party. The risk of interception is relatively low.

  Furthermore, by communicating the USB charger according to the above embodiment according to the PLC (Power Line Communication) standard, the SSID and the password can be exchanged between a plurality of USB chargers connected to a 100 V power source at a remote location. Is possible.

500 SSID Password Change System 510 Mobile Communication Terminal 520 Mobile Router 530 Battery Charger 531 USB Connection Terminal 532 SSID Password Generation Unit

Claims (10)

An SSID password change system for changing an SSID and a password used for Wi-Fi communication,
A portable communication terminal capable of USB connection;
A mobile router capable of USB connection through Wi-Fi communication with the mobile communication terminal;
A battery charger having a USB connection terminal and charging the mobile router and the mobile router connected via USB;
The charger has a SSID password generation unit that newly generates an SSID and a password,
The charger transmits the newly generated SSID and password to the mobile communication terminal and the mobile router connected via USB by USB communication, and the newly generated SSID and password are transmitted to the mobile communication terminal and the mobile router. An SSID password change system that is set to an SSID and password used for Wi-Fi communication.   The SSID password change system according to claim 1, wherein the charger has a plurality of the USB connection terminals. The charger includes a USB communication circuit that performs USB communication, a short circuit that short-circuits USB data lines D + and D-, and a switching unit that switches between the USB communication circuit and the short circuit. Have
3. The SSID password change system according to claim 1, wherein the switching unit switches the USB communication circuit to the short circuit after newly transmitting an SSID and a password to the mobile communication terminal and the mobile router. 4. The SSID password generation unit generates a corresponding index together with the newly generated SSID and password,
The charger transmits the newly generated SSID and password corresponding to the USB-connected mobile communication terminal and the mobile router via USB communication,
The mobile communication terminal has a first storage unit that stores an SSID received from the charger and an index corresponding to a password,
The mobile router has a second storage unit that stores the SSID and password received from the charger and a corresponding index, and an SSID password switching control unit that controls switching of the SSID and password,
The mobile router makes an inquiry about the index stored in the first storage unit to the mobile communication terminal by Wi-Fi communication, and stores the index stored in the first storage unit and the second storage unit. Check whether there is a match with the index,
If there is a match between the index stored in the mobile router and the index stored in the mobile communication terminal, the SSID password switching control unit, the SSID and password corresponding to one of the matching indexes Is set to the SSID and password used for Wi-Fi communication, and the mobile communication terminal is notified of one of the matching indexes by Wi-Fi communication, and corresponds to the matching index. The SSID password change system according to any one of claims 1 to 3, which instructs to set the SSID and password to the SSID and password used for Wi-Fi communication. A battery charger comprising a USB connection terminal, a USB communication terminal capable of USB connection, and a charger for charging a mobile router capable of USB connection through Wi-Fi communication with the mobile communication terminal,
A USB communication control unit for controlling USB communication with the mobile communication terminal and the mobile router;
An SSID password generation unit for newly generating an SSID and a password used for Wi-Fi communication,
Wherein when the mobile communication terminal and the mobile router is connected to the USB connection terminal, a charger the USB communication control unit transmits the connected SSID and password generated in the device by USB communication.   The charger according to claim 5, comprising a plurality of the USB connection terminals. A USB communication circuit for performing USB communication;
A short circuit that short-circuits D + and D−, which are USB data lines, and a switching unit that switches between the USB communication circuit and the short circuit,
The charger according to claim 5 or 6, wherein the switching unit switches from the USB communication circuit to the short circuit after newly transmitting an SSID and a password to the mobile communication terminal and the mobile router. The mobile communication having a USB connection terminal and USB connection for changing the SSID and password of a mobile communication terminal capable of USB connection and a mobile router capable of Wi-Fi communication with the mobile communication terminal and capable of USB connection A SSID password changing method using a charger capable of charging a terminal and the mobile router and generating a new SSID and password,
In the charger, generating a new SSID and password;
In the charger, transmitting the newly generated SSID and password to the mobile communication terminal and the mobile router connected via USB by USB communication;
In the mobile communication terminal and the mobile router, setting the newly generated SSID and password to the SSID and password used for Wi-Fi communication;
SSID password changing method comprising: The charger further includes a USB communication circuit that performs USB communication, a short circuit that short-circuits USB data lines D + and D−, and a switching unit that switches between the USB communication circuit and the short circuit. And
The SSID password changing method according to claim 8, further comprising the step of switching the USB communication circuit to the short circuit after the switching unit newly transmits an SSID and a password to the mobile communication terminal and the mobile router. A new SSID and the charger control program capable of generating a password with charging a USB-connected mobile communication terminal及Beauty Mobile router has a U SB connection terminals,
In the charger, generating a new SSID and password;
A control program for causing the computer of the charger to execute the step of transmitting the newly generated SSID and password to the portable communication terminal and the mobile router connected to the USB by USB communication in the charger.

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