JP5789219B2 - Wireless communication apparatus, communication device, wireless communication method, and wireless communication control program - Google Patents

Description

  The present invention relates to a wireless communication device, a communication device, a wireless communication method, and a wireless communication control program for setting communication with another wireless communication device.

  Conventionally, a wireless communication device performs communication settings in advance when performing communication with other wireless communication devices using Wi-Fi in 2.4 GHz or 5 GHz band (for example, Patent Documents 1 and 2). . Patent Documents 1 and 2 disclose WPS (Wi-Fi Protected Setup) performed between a station (hereinafter referred to as STA) and an access point (hereinafter referred to as AP). Note that “STA” and “AP” are roles of the wireless communication apparatus.

  WPS is a standard established by an industry group called Wi-Fi Alliance so that wireless communication devices can be easily connected and security settings can be made. The STA and the AP perform WPS as an initial setting necessary before starting communication. First, when the STA receives a user operation, the STA searches for and connects to the AP. Next, the AP transmits the authentication key held by itself to the STA. Then, the STA stores the authentication key received from the AP.

  After WPS is completed in this way, the STA and the AP perform WPA (Wi-Fi Protected Access) when performing communication. That is, the AP determines whether or not the authentication key stored in advance in the STA matches the authentication key held by the AP. If the two authentication keys match as a result of the determination, the STA and the AP are connected and start communication.

JP 2005-142907 A JP 2006-60578 A

  However, there is a demand to apply the above-described WPS to WiGig (Wireless Gigabit), which is a standard for wireless communication using millimeter waves, and simply perform communication settings. .

  In WiGig, the role of the wireless communication apparatus includes STA and PCP (Personal basic service set Central Point) having the same role as AP. In WiGig, the roll of a wireless communication apparatus is not fixed like Wi-Fi in 2.4 GHz or 5 GHz band. For this reason, the role at the time of WPS execution and the role at the time of WPA execution may be reversed. For example, when WPS is executed, wireless communication device a is STA and wireless communication device b is PCP, but when WPA is executed, wireless communication device a is changed to PCP and wireless communication device b is changed to STA. Occur.

  In this case, if the wireless communication device b that is a PCP changes to an STA when executing WPA, the wireless communication device that has changed to a PCP because the wireless communication device a does not have an authentication key used in the WPA when the wireless communication device a is a PCP. There is a problem that it cannot be connected to a.

  An object of the present invention is to enable connection between wireless communication devices even when the role of each wireless communication device changes between when WPS is executed and when WPA is executed.

  The wireless communication device of the present invention is a wireless communication device that performs communication settings for performing wireless communication using millimeter waves with other wireless communication devices, and information related to wireless communication performed by itself Based on information related to wireless communication performed by another wireless communication device, whether or not both the device and the other wireless communication device are capable of wireless communication using millimeter waves is determined between the other wireless communication devices. The authentication key exchange determination unit for determining whether or not the authentication key needs to be exchanged with the other wireless communication apparatus based on the determination result of the authentication key exchange determination unit. An authentication key exchanging unit for exchanging.

  The communication device of the present invention is a communication device that connects to a wireless communication device that performs wireless communication using millimeter waves with another wireless communication device, and performs communication settings for executing the wireless communication, Based on information related to wireless communication performed by the wireless communication device and information related to wireless communication performed by the other wireless communication device, both the wireless communication device and the other wireless communication device can perform wireless communication using millimeter waves. An authentication key exchange determination unit that determines whether or not an authentication key needs to be exchanged between the wireless communication device and the other wireless communication device, and an authentication key exchange determination unit An authentication key exchanging unit that exchanges an authentication key between the wireless communication device and the other wireless communication device based on the determination result.

  The wireless communication method of the present invention is a wireless communication method performed by a wireless communication device that performs communication settings for performing wireless communication using millimeter waves with another wireless communication device, and is performed by the wireless device itself. Based on the information related to communication and the information related to wireless communication performed by the other wireless communication device, whether or not both the own device and the other wireless communication device can perform wireless communication using millimeter waves, A step of determining whether or not an authentication key needs to be exchanged with a communication device, and a step of exchanging an authentication key with the other wireless communication device based on the result of the determination And having.

  The wireless communication control program of the present invention is a wireless communication control program that is executed by a computer of a wireless communication device that performs communication settings for performing wireless communication using millimeter waves with other wireless communication devices, Based on whether information regarding wireless communication performed by the own device and information regarding wireless communication performed by the other wireless communication device is enabled, whether both the device and the other wireless communication device are capable of wireless communication using millimeter waves. A process for determining whether or not an authentication key needs to be exchanged with the other wireless communication apparatus, and an authentication key with the other wireless communication apparatus based on the result of the determination And a process for exchanging.

  According to the present invention, wireless communication devices can be connected to each other even if the role of each wireless communication device changes between when WPS is executed and when WPA is executed.

FIG. 2 is a block diagram showing a configuration example of a communication system and a wireless communication apparatus according to the first embodiment. The figure which shows the format example of the setting information which concerns on this Embodiment 1. The figure which shows the example of a format of the own apparatus information which concerns on this Embodiment 1. Flowchart showing an operation example of the wireless communication apparatus according to the first embodiment Sequence diagram showing an example of message transmission / reception of the wireless communication apparatus according to the first embodiment The figure which shows the example of a parameter contained in the beacon which concerns on this Embodiment 1. The figure which shows the parameter example contained in Probe request which concerns on this Embodiment 1. The figure which shows the structural example using the software which concerns on this Embodiment 1. Flowchart showing an operation example of the wireless communication apparatus according to the second embodiment

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

(Embodiment 1)
FIG. 1 shows a configuration example of a communication system according to the present embodiment. The communication system according to the present embodiment includes wireless communication apparatus 100 and wireless communication apparatus 200 according to the present embodiment. Further, in the communication system according to the present embodiment, a case where the wireless communication apparatus 100 performs communication settings with the wireless communication apparatus 200 to perform communication using WiGig will be described as an example. In this case, for example, when transmitting and receiving data such as moving images and photographs using WiGig communication between two wireless communication devices respectively owned by two users, communication settings for wireless connection are set in advance. It is a scene of doing. Hereinafter, communication using WiGig is appropriately referred to as “WiGig communication”. WiGig communication is an example of wireless communication using millimeter waves.

<Description of WiGig>
First, WiGig communication used in the communication system of the present embodiment will be described.

  Conventionally, wireless communication at a maximum of several hundreds Mbps (hereinafter referred to as Wi-Fi communication) using Wi-Fi in the 2.4 GHz band or the 5 GHz band has been widespread. On the other hand, with the improvement in the number of pixels of televisions and cameras and the increase in the capacity of storage devices, the size of communicable data is in units of gigabytes and has become larger than before. There is a problem that it takes time to transmit and receive such large data when using Wi-Fi communication.

  In order to solve the above problem, this embodiment uses WiGig communication that is expected to perform high-speed wireless transmission. WiGig communication uses a 60 GHz radio wave band that belongs to millimeter waves that are relatively rarely used. Thereby, WiGig communication can perform a high-speed digital wireless transmission of 7 Gbps at maximum using a wide band of 7-9 GHz. In addition, WiGig communication has a feature that wireless communication devices can directly communicate with each other. Furthermore, WiGig communication has a feature that each wireless communication apparatus can operate in either STA or PCP rolls.

  By using such WiGig communication, the communication system according to the present embodiment can significantly reduce the time required for transmission and reception of data even in units of gigabytes. In the communication system according to the present embodiment, the present invention has occurred in order to make it possible to apply WPS used in Wi-Fi to WiGig.

<Configuration of Wireless Communication Device 100>
In FIG. 1, the wireless communication apparatus 100 according to the present embodiment performs communication settings in order to perform WiGig communication with the wireless communication apparatus 200. Applications of the wireless communication device 100 and the wireless communication device 200 include smartphones, tablets, personal computers, Blu-ray disc recorders, televisions, game machines, music players, dongles, access points, routers, and the like. The dongle is a device that can be attached to and detached from a predetermined device through an interface such as USB (Universal Serial Bus).

  The wireless communication apparatus 100 includes a calculation unit 102, a storage unit 103, a communication unit 104, a display unit 105, and an operation unit 106.

  The arithmetic unit 102 includes, for example, a power source, a motherboard, a CPU (Central Processing Unit), a recording medium such as a ROM (Read Only Memory) storing a control program, and a working memory such as a RAM (Random Access Memory). The

  In this embodiment, the calculation unit 102 includes a setting start unit 107, a role determination unit 108, a device search unit 109, a connection unit 110, an authentication key exchange determination unit 111, a secret key sharing unit 112, and an authentication key exchange unit 113. And a cutting portion 114. The functions of these units are realized by the CPU executing a control program. Details of each part will be described later.

  Note that the arithmetic unit 102 may be configured by an integrated circuit integrated on one semiconductor chip, such as SoC (System on a Chip). In that case, each part of the arithmetic unit 102 may be individually made into one chip, or a plurality of parts may be made into one chip. The integrated circuit can be an LSI (Large Scale Integration), an IC (Integrated Circuit), a system LSI, a super LSI, an ultra LSI, or the like depending on the degree of integration. The integrated circuit may be realized by a dedicated circuit or a general-purpose processor. The integrated circuit may be an FPGA (Field Programmable Gate Array) that can be programmed after its manufacture, or a configurable processor that can reconfigure internal circuit cell connections and settings. Furthermore, each unit of the arithmetic unit 102 may be realized by integration by other integrated circuit technology (for example, biotechnology) that replaces LSI in accordance with progress of semiconductor technology or other derived technology.

  The storage unit 103 is a non-volatile storage medium such as an HDD (Hard Disc Drive), an SSD (Solid State Drive), or a flash memory. The storage unit 103 stores software such as an operating system and applications, and various types of information as parameters. The software is loaded into the memory of the calculation unit 102 and is activated and operated by being processed by the CPU.

  In the present embodiment, the storage unit 103 includes setting information 115 and own device information 116. Details of these information will be described later.

  The communication unit 104 is an interface for realizing WiGig communication with the wireless communication device 200. The communication unit 104 is also an interface for realizing WPS and WPA (including WPA2) with the wireless communication apparatus 200. WPA2 is a wireless LAN encryption standard defined by the Wi-Fi Alliance, and is compatible with stronger encryption than WPA.

  The display unit 105 is a display device such as a liquid crystal display. The display unit 105 may not be an essential configuration.

  The operation unit 106 is an input device that accepts a user operation, such as a keyboard, a mouse, a hardware button, or a touch panel.

  Here, a setting start unit 107, a role determination unit 108, a device search unit 109, a connection unit 110, an authentication key exchange determination unit 111, a secret key sharing unit 112, an authentication key exchange unit 113, and a disconnection unit included in the calculation unit 102 Each of 114 will be described.

  The setting start unit 107 inputs a communication setting start request from the operation unit 106. When the operation unit 106 receives an operation requesting the start of communication setting from the user, the operation unit 106 generates a communication setting start request and outputs the request to the setting start unit 107. The communication setting starts with the output of the communication setting start request as a trigger.

  The setting start unit 107 reads out the setting information 115 and the own device information 116 from the storage unit 103 with the input of the communication setting start request as a trigger. Details of the setting information 115 and the own device information 116 will be described later.

  The setting start unit 107 outputs the read setting information 115 and own device information 116 to the role determination unit 108.

  The role determination unit 108 inputs the setting information 115 and the own device information 116 from the setting start unit 107 and the device search result from the device search unit 109 or the connection unit 110. The device search result is information output from the device search unit 109 or the connection unit 110, and is information indicating a result of searching for a wireless communication device that is a communication partner (also referred to as “connection partner” as appropriate). Here, the device search result input to the role determination unit 108 is information indicating that the search result is a failure. When the wireless communication device 100 is an STA, the device search result is output from the device search unit 109 to the role determination unit 108. On the other hand, when the wireless communication device 100 is a PCP, the device search result is output from the connection unit 110 to the role determination unit 108.

  The role determination unit 108 determines the role of the wireless communication device 100 as either STA or PCP based on the own device information 116 and the device search result. This determination result, that is, information indicating STA or PCP is hereinafter referred to as “role determination result”. The role determining unit 108 sends the input setting information 115 to the next device searching unit 109 without using the setting information 115 for determining the role.

  Any method can be adopted to determine the roll. For example, the role determination unit 108 is determined in advance to determine the role of its own device as the STA when the first roll is determined. Thereafter, when the device search result is unsuccessful, the role determination unit 108 changes the role of the own device to PCP. When the role is changed in this way, the own device has both functions of STA and PCP, and the own device information 116 is set to indicate that the own device can be either STA or PCP. It is a prerequisite.

  The role determination unit 108 outputs the role determination result, the setting information 115, and the own device information 116 to the device search unit 109.

  The device search unit 109 receives the role determination result, the setting information 115, and the own device information 116 from the role determination unit 108.

<Description of STA operation>
Here, first, the operation when the role determination result is STA will be described. In this case, the device search unit 109 performs a scan for searching for beacons transmitted by neighboring PCPs.

  As a result of the scan, if a beacon that can be identified as being for WPS (hereinafter referred to as a WPS beacon) is not received within a certain period, the device search unit 109 returns to role determination. In this case, the device search unit 109 outputs a device search result indicating that the search result is unsuccessful to the role determination unit 108.

  On the other hand, if the WPS beacon is received within a certain period as a result of the scan, the device search unit 109 first searches for the partner device information of the communication partner that has been searched based on the parameters included in the WPS beacon. Generate. This counterpart device information includes an SSID (Service Set Identifier), a MAC address, a Device Password ID, and a communication frequency band. For example, when the communication partner that has been searched for is the wireless communication device 200, the partner device information is the content related to the wireless communication device 200. Then, the device search unit 109 outputs the device search result indicating that the search result is successful, the generated partner device information, the setting information 115, and the own device information 116 to the connection unit 110.

<Description of PCP operation>
Next, an operation when the roll determination result is PCP will be described. In this case, the device search unit 109 transmits a WPS beacon to the surroundings via the communication unit 104. Device searching section 109 then outputs setting information 115 and own apparatus information 116 to connecting section 110.

  Connection unit 110 operates as follows depending on whether radio communication apparatus 100 is an STA or a PCP.

<Description of STA operation>
The connection unit 110 operates as follows when the wireless communication apparatus 100 is an STA. First, the connection unit 110 inputs a device search result, counterpart device information, setting information 115, and own device information 116 from the device search unit 109. Then, the connection unit 110 transmits a probe request that is a connection request to the wireless communication device 200 via the communication unit 104 and receives a probe response from the wireless communication device 200. Thereafter, connecting unit 110 transmits an association request to radio communication apparatus 200 and receives an association response from radio communication apparatus 200. In this way, the connection unit 110 completes the connection process for authentication key exchange.

<Description of PCP operation>
On the other hand, when the wireless communication apparatus 100 is a PCP, the connection unit 110 operates as follows. First, the connection unit 110 inputs the setting information 115 and the own device information 116 from the device search unit 109. When the connection unit 110 does not receive a probe request as a connection request from the surroundings for a certain period of time via the communication unit 104, the connection unit 110 returns to role determination. In this case, the connection unit 110 first outputs a control signal for stopping the transmission of the WPS beacon to the device search unit 109. Next, the connection unit 110 outputs a device search result indicating that the search result is unsuccessful to the role determination unit 108.

  On the other hand, when a probe request is received from the surroundings for a certain period, the connection unit 110 generates partner apparatus information of a communication partner that is a probe request transmission source based on parameters included in the probe request. This counterpart device information includes a MAC address and a communication frequency band. For example, when the communication partner that is the transmission source of the probe request is the wireless communication device 200, the partner device information is the content regarding the wireless communication device 200. Connection section 110 then generates a probe response and transmits it to radio communication apparatus 200. Thereafter, when the connection unit 110 receives an association request from the wireless communication device 200, the connection unit 110 transmits an association response to the wireless communication device 200. In this way, the connection unit 110 completes the connection process for authentication key exchange.

  As described above, when the connection process with the communication partner is completed, the connection unit 110 outputs the partner device information, the setting information 115, and the own device information 116 to the authentication key exchange determination unit 111. As described above, the partner device information includes at least a MAC address and a communication frequency band. Note that the partner device information when the communication partner is PCP includes the SSID of the communication partner. The completion of the connection process means that the connection between the wireless communication apparatus 100 and the wireless communication apparatus 200 is successful. In the following, the description will be made on the assumption that this connection is successful, but the connection may fail. If the connection fails, the connection unit 110 retries the connection process.

  Authentication key exchange determination unit 111 receives counterpart device information, setting information 115 and host device information 116 from connection unit 110.

  Authentication key exchange determining section 111 determines whether both wireless communication apparatus 100 and wireless communication apparatus 200 are capable of WiGig communication based on counterpart apparatus information and own apparatus information 116. If the authentication key exchange determination unit 111 determines that both the wireless communication apparatus 100 and the wireless communication apparatus 200 can perform WiGig communication, the authentication key exchange determination unit 111 sets an authentication key exchange flag. On the other hand, if it is determined that only one of the wireless communication device 100 and the wireless communication device 200 can perform WiGig communication, the authentication key exchange determination unit 111 does not set an authentication key exchange flag. In the above determination, “whether or not WiGig communication is enabled” can be rephrased as “whether or not a WiGig device is installed”.

  The fact that the authentication key exchange flag is set means that the authentication key exchange determination unit 111 has determined that an authentication key used for WPA needs to be exchanged between the wireless communication apparatus 100 and the wireless communication apparatus 200. means. The exchanged authentication key is an authentication key when the communication partner is a PCP. That is, “exchange of authentication key” is performed as follows, for example. The wireless communication device 100 transmits to the wireless communication device 200 an authentication key held by the device itself when the wireless communication device 100 is a PCP. The wireless communication device 200 receives the authentication key when the wireless communication device 100 is a PCP and stores it in its own device. Similarly, the wireless communication device 200 transmits to the wireless communication device 100 an authentication key held by the wireless communication device 200 when the wireless communication device 200 is a PCP. The wireless communication device 100 receives an authentication key when the wireless communication device 200 is a PCP and stores it in its own device.

  Authentication key exchange determination unit 111 outputs counterpart device information, setting information 115, and own device information 116 to secret key sharing unit 112. Further, the authentication key exchange determination unit 111 outputs an authentication key exchange flag to the authentication key exchange unit 113.

  The secret key sharing unit 112 inputs the counterpart device information, the setting information 115, and the own device information 116 from the authentication key exchange determination unit 111. Next, the secret key sharing unit 112 creates a secret key using the Diffie-Hellman key sharing method (DH method) with the wireless communication apparatus 200 that is a connection partner, and shares the secret key via the communication unit 104. To do. Then, the secret key sharing unit 112 outputs the secret key, counterpart device information, setting information 115, and own device information 116 to the authentication key exchanging unit 113.

  The authentication key exchanging unit 113 inputs the secret key, partner device information, setting information 115, and own device information 116 from the secret key sharing unit 112. Further, the authentication key exchange unit 113 inputs an authentication key exchange flag from the authentication key exchange determination unit 111.

<Description of STA operation>
Here, when the wireless communication apparatus 100 is a STA and the authentication key exchange flag is not set, the authentication key exchange unit 113 operates as follows.

  First, the authentication key exchanging unit 113 transmits an authentication key [2], an authentication method, an encryption method, an SSID, and a MAC address (hereinafter, “authentication key [2]) from the wireless communication apparatus 200, which is a PCP, via the communication unit 104. Etc.)). The authentication key [2] is an authentication key (an example of a second authentication key) used for WPA when the wireless communication apparatus 200 is a PCP. The “authentication key [2] etc.” here is, for example, 453 to 457 of the setting information 215 described later with reference to FIG.

  Next, the authentication key exchange unit 113 decrypts the authentication key [2] and the like with the secret key.

  Next, the authentication key exchange unit 113 stores the authentication key [2], the authentication method, the encryption method, and the MAC address in the storage unit 103 as setting information 115 for each SSID. The stored setting information 115 is, for example, counterpart PCP setting information 408, which will be described later with reference to FIG.

  On the other hand, when the wireless communication apparatus 100 is a STA and the authentication key exchange flag is set, the authentication key exchange unit 113 operates as follows.

  First, the authentication key exchanging unit 113 encrypts the authentication key [1], the authentication method, the encryption method, the SSID, and the MAC address (hereinafter referred to as “authentication key [1]”) held by the own device with a secret key. To do. The authentication key [1] is an authentication key (an example of a first authentication key) used for WPA when the wireless communication apparatus 100 is a PCP. The “authentication key [1] etc.” here is, for example, 403 to 407 of the setting information 115 described later with reference to FIG.

  Next, the authentication key exchanging unit 113 transmits the encrypted authentication key [1] and the like to the wireless communication apparatus 200 that is a PCP via the communication unit 104.

  Next, the authentication key exchange unit 113 performs the same operation as described above when the wireless communication apparatus 100 is an STA and the authentication key exchange flag is not set.

<Description of PCP operation>
Authentication key exchanging section 113 operates as follows when wireless communication apparatus 100 is PCP and when the authentication key exchange flag is not set.

  First, the authentication key exchange unit 113 encrypts the authentication key [1] and the like held by its own device with a secret key.

  Then, the authentication key exchanging unit 113 transmits the encrypted authentication key [1] or the like to the wireless communication apparatus 200 that is the STA via the communication unit 104.

  On the other hand, when the wireless communication device 100 is a PCP and the authentication key exchange flag is set, the authentication key exchange unit 113 operates as follows.

  First, the authentication key exchanging unit 113 decrypts the authentication key [2] received from the wireless communication apparatus 200 as the STA via the communication unit 104 with the secret key.

  Then, the authentication key exchange unit 113 stores the authentication key [2], the authentication method, the encryption method, and the MAC address in the storage unit 103 as setting information 115 for each SSID.

  Thereafter, the authentication key exchange unit 113 performs the same operation as described above when the wireless communication device 100 is PCP and the authentication key exchange flag is set.

  As described above, the authentication key exchanging unit 113 exchanges setting information, in other words, exchanges authentication keys. After the authentication key exchange, the authentication key exchange unit 113 outputs the exchange result to the cutting unit 114. The exchange result is information indicating whether the exchange of the authentication key has succeeded or failed.

  The cutting unit 114 inputs the exchange result from the authentication key exchange unit 113. The disconnection unit 114 transmits and receives a disconnection message to and from the wireless communication device 200 that is the connection partner. Thereafter, the cutting unit 114 outputs the WPS processing result to the display unit 105, for example. The WPS processing result is information indicating whether the WPS has succeeded or failed.

  This is the end of the description of each unit included in the calculation unit 102.

  Subsequently, the setting information 115 and the own device information 116 included in the storage unit 103 will be described.

<Description of setting information>
First, the setting information 115 of the wireless communication device 100 will be described with reference to FIG. FIG. 2 is a diagram illustrating a format example of the setting information 115. In FIG. 2, the setting information 215 of the wireless communication device 200 is also illustrated, but this will be described later.

  The setting information 115 includes own PCP setting information 402 and partner PCP setting information 408.

  The own device PCP setting information 402 is a parameter group used when executing WPA when the own device, that is, the wireless communication device 100 is a PCP. The own PCP setting information 402 includes SSID 403, authentication method 404, encryption method 405, authentication key 406, and MAC address 407 as parameters.

  The partner PCP setting information 408 is a parameter group used when executing WPA when the communication partner of the wireless communication apparatus 100 is PCP. The partner PCP setting information 408 includes an SSID 409, an authentication method 410, an encryption method 411, an authentication key 412, and a MAC address 413 as parameters. The partner PCP setting information 408 exists for each communication partner that has completed WPS with the wireless communication apparatus 100. That is, when wireless communication apparatus 100 has completed WPS with a plurality of wireless communication apparatuses, storage unit 103 has counterpart PCP setting information 408 for each wireless communication apparatus.

  Here, each parameter of own PCP setting information 402 and counterpart PCP setting information 408 will be described below. The following parameters are defined in Wi-Fi.

  The SSID 403 is an identifier of the own device that operates as a PCP. The SSID 409 is an identifier of a communication partner that operates as a PCP.

  Authentication methods 404 and 410 are items for specifying a protocol for performing WPA, and there are various types. In FIG. 2, as an example, WPA2-personal which is a protocol used in WiGig is designated.

  Encryption methods 405 and 411 are items for specifying a method for encrypting data to be communicated after completion of WPA, and there are various types. In FIG. 2, AES-GCMP, which is an encryption method defined by WiGig, is specified as an example.

  The authentication keys 406 and 412 are data strings for confirming the coincidence on the PCP side when performing key authentication during WPA execution. This data string is, for example, a hexadecimal number. The authentication keys 406 and 412 are generally different data strings for each PCP.

  The MAC addresses 407 and 413 are identifiers for identifying the wireless communication device, and are used for identifying and specifying the own device and the communication partner.

  Such setting information 115 is created, for example, when a user activates a wireless setting application and inputs a value for each parameter. Alternatively, the setting information 115 is created, for example, by storing an authentication key obtained by executing WPS.

<Description of device information>
Next, the own apparatus information 116 will be described with reference to FIG. FIG. 3 is a diagram illustrating a format example of the own device information 116. In FIG. 3, the device information 216 is also illustrated, but this will be described later.

  The own device information 116 is information regarding the wireless communication capability of the own device, that is, the wireless communication device 100. In the example of FIG. 3, the own device information 116 includes a communication frequency band 1001 and roll information 1002 as parameters indicating wireless communication capability. Note that the configuration of such device information is not defined in Wi-Fi and WiGig.

  A communication frequency band (RF Bands) 1001 indicates a frequency band in which the wireless communication apparatus 100 can communicate using the communication unit 104. For example, when the wireless communication apparatus 100 can communicate using Wi-Fi, the communication frequency band is “2.4 GHz” or “5 GHz”. Further, for example, when the wireless communication apparatus 100 can communicate using WiGig, the communication frequency band is described as “60 GHz”. In the example of FIG. 3, since the communication frequency band 1001 is “60 GHz”, the wireless communication device 100 can communicate only with WiGig. Note that when the wireless communication apparatus 100 can communicate with both Wi-Fi and WiGig, the communication frequency band 1001 is “2.4 GHz, 5 GHz, 60 GHz”.

  The role information 1002 indicates which role the wireless communication apparatus 100 can operate in when WiGig communication is possible. When the wireless communication apparatus 100 can operate in either STA or PCP, the role information 1002 is described as “both STA and PCP OK” as shown in FIG. On the other hand, when the wireless communication apparatus 100 can operate only in either PCP or STA, the role information 1002 is described as “PCP only” or “STA only”. That is, by changing the content of the role information 1002, the role of the own device can be limited.

  Such own device information 116 is created when a user starts a wireless setting application and inputs a value for each parameter. Alternatively, the device information 116 is stored in the storage unit of the device itself by installing software such as a wireless device driver or middleware.

  Above, description about each information with which the memory | storage part 103 is provided is completed.

  In such a wireless communication apparatus 100, the authentication key exchange determination unit 111 sets an authentication key exchange flag when both the wireless communication apparatus 100 and the wireless communication apparatus 200 are communicable with WiGig. Then, when the authentication key exchange flag is set, the authentication key exchange unit 113 exchanges the WPA authentication key between the wireless communication device 100 and the wireless communication device 200. As a result, the wireless communication device 100 and the wireless communication device 200 can hold the WPA authentication key when the communication partner is PCP. Therefore, the wireless communication device 100 and the wireless communication device 200 can be connected regardless of which is STA or PCP when WPA is executed. That is, the wireless communication device 100 and the wireless communication device 200 can be connected even if the role of each wireless communication device changes between when WPS is executed and when WPA is executed.

<Configuration of Wireless Communication Device 200>
In FIG. 1, the wireless communication apparatus 200 includes a calculation unit 202, a storage unit 203, a communication unit 204, a display unit 205, and an operation unit 206. Each of these functional units has the same functions as the arithmetic unit 102, the storage unit 103, the communication unit 104, the display unit 105, and the operation unit 106 of the wireless communication apparatus 100 in order.

  The calculation unit 202 includes a setting start unit 207, a role determination unit 208, a device search unit 209, a connection unit 210, an authentication key exchange determination unit 211, a secret key sharing unit 212, an authentication key exchange unit 213, and a disconnection unit 214. Have. These functional units are, in order, the setting start unit 107, the role determination unit 108, the device search unit 109, the connection unit 110, the authentication key exchange determination unit 111, the secret key sharing unit 112, and the authentication key exchange unit of the wireless communication apparatus 100. 113 and the cutting unit 114 have the same functions.

  Therefore, the configuration of radio communication apparatus 200 is the same as that of radio communication apparatus 100. For this reason, the description about the structure of the radio | wireless communication apparatus 200 is abbreviate | omitted.

  In addition, the storage unit 203 includes setting information 215 and own device information 216. Each of these pieces of information has the same configuration as the setting information 115 and the own device information 116 of the wireless communication device 100 in order.

  As shown in FIG. 2, the setting information 215 of the wireless communication apparatus 200 is configured with own PCP setting information 452 and counterpart PCP setting information 458. These pieces of information have the same configuration as that of the own PCP setting information 402 and the partner PCP setting information 408 of the setting information 115 in order.

  As shown in FIG. 2, own PCP setting information 452 includes SSID 453, authentication method 454, encryption method 455, authentication key 456, and MAC address 457 as parameters. These pieces of information have the same configuration as the SSID 403, the authentication method 404, the encryption method 405, the authentication key 406, and the MAC address 407 of the setting information 115 of the wireless communication apparatus 100 in order.

  As shown in FIG. 2, the partner PCP setting information 458 includes an SSID 459, an authentication method 460, an encryption method 461, an authentication key 462, and a MAC address 463 as parameters. These pieces of information have the same configuration as the SSID 409, the authentication method 410, the encryption method 411, the authentication key 412, and the MAC address 413 of the setting information 115 in this order.

  As shown in FIG. 3, the own device information 216 includes a communication frequency band 1003 and roll information 1004. These pieces of information have the same configuration as the communication frequency band 1001 and the roll information 1002 of the own apparatus information 116 in order.

  Therefore, the configuration of the setting information 215 and the own device information 216 is the same as the configuration of the setting information 115 and the own device information 116, respectively. For this reason, description about the structure of the setting information 215 and the own apparatus information 216 is abbreviate | omitted.

  Such a wireless communication device 200 can obtain the same effects as the wireless communication device 100. That is, the wireless communication device 100 and the wireless communication device 200 can hold the WPS authentication key when the communication partner is PCP. Therefore, the wireless communication device 100 and the wireless communication device 200 can be connected regardless of which is STA or PCP when WPA is executed. That is, the wireless communication device 100 and the wireless communication device 200 can be connected even if the role of each wireless communication device changes between when WPS is executed and when WPA is executed.

<Operation of communication system>
Hereinafter, an operation example of communication setting performed between the communication system according to the present embodiment, that is, between the wireless communication apparatus 100 and the wireless communication apparatus 200 will be described with reference to FIGS. 4 and 5.

  FIG. 4 is a flowchart illustrating an example of communication setting operation performed by the wireless communication device 100 and the wireless communication device 200. FIG. 5 is a sequence diagram illustrating an example of message transmission / reception between wireless communication devices corresponding to the operation illustrated in FIG. 4.

  In steps S501 and S521, the wireless communication device 100 and the wireless communication device 200 each start WPS.

  The start of the WPS is triggered by the following operation, for example. First, the user faces the wireless communication device 100 and the wireless communication device 200. Next, the user activates an application for performing WiGig communication in each of the wireless communication device 100 and the wireless communication device 200. Then, in each of the wireless communication device 100 and the wireless communication device 200, the user selects a “WPS start” menu from the setting screen of the activated application.

  The operation units 106 and 206 accept the operation of selecting the “WPS start”. Then, the operation units 106 and 206 generate the above-described communication setting start request and output the request to the setting start units 107 and 207, respectively. Upon receiving this communication setting start request, the setting start units 107 and 207 read the setting information 115 and 215 and the own device information 116 and 216 from the storage units 103 and 203, respectively. Then, the setting start unit 107 outputs the read setting information 115 and own device information 116 to the role determination unit 108. On the other hand, the setting start unit 207 outputs the read setting information 215 and own device information 216 to the role determination unit 208.

  Note that steps S501 and S521 correspond to steps S601 and S602 in FIG. 5, respectively.

  In step S502, the role determination unit 108 sets the role of the wireless communication device 100 to either STA or PCP based on the input setting information 115 and the own device information 116 and the device search result output from the device search unit 109. Decide on. In step S522, the role determination unit 208 sets the role of the wireless communication device 200 to either STA or PCP based on the input setting information 215 and own device information 216 and the device search result output from the connection unit 210. To decide.

  Here, as an example, it is assumed that the wireless communication apparatus 100 is determined to be an STA and the wireless communication apparatus 200 is determined to be a PCP, and the description will proceed. Therefore, the role determination unit 108 outputs the setting information 115, the own device information 116, and the role determination result (STA) to the device search unit 109. On the other hand, the role determination unit 208 outputs the setting information 215, the own device information 216, and the role determination result (PCP) to the device search unit 209.

  In step S503, when the setting information 115, the own device information 116, and the role determination result (STA) are input, the device searching unit 109 scans the surroundings and searches for a WPS beacon via the communication unit 109.

  If the device search unit 109 does not receive a WPS beacon for a certain period of time (S503: no reception), the device search unit 109 determines that the search for the communication partner has failed and stops scanning. Then, the device search unit 109 outputs a device search result indicating that the communication partner search has failed together with the own device information 116 and the setting information 115 to the role determination unit 108. Thereby, the device search unit 109 returns to step S502. Then, the role determination unit 108 determines the role of the own device again.

  On the other hand, when receiving a WPS beacon during a certain period, device searching section 109 determines that the communication partner has been successfully searched, and generates partner device information based on the parameters included in the WPS beacon. This partner device information includes at least the MAC address and communication frequency band of the communication partner that has been searched. The device search unit 109 outputs a device search result indicating that the communication partner search has been successful to the connection unit 110 together with the generated partner device information, the own device information 116, and the setting information 115. Then, the device search unit 109 proceeds to step S504.

  In step S523, the device search unit 209 inputs the setting information 215, the own device information 216, and the role determination result (PCP). Next, the device search unit 209 extracts the SSID 453 and the MAC address 457 from the setting information 215, and extracts the communication frequency band 1003 and the roll information 1004 from the own device information 216. Next, the device search unit 209 describes the extracted parameters in the body area of the MAC frame in accordance with Wi-Fi, WiGig, and WSC beacon formats. The device search unit 209 wirelessly transmits a WPS beacon including each parameter via the communication unit 204. This step S523 corresponds to step S603 in FIG.

  After wireless transmission of the WPS beacon, the device search unit 209 outputs the setting information 215 and the own device information 216 to the connection unit 210.

  Here, a format example of the WPS beacon will be described. FIG. 6 is a diagram illustrating an example of a format of a WPS beacon.

  As shown in FIG. 6, the WPS beacon includes SSID 701, Device Password ID 702, and communication frequency band 703 as parameters. These parameters are described in the body area of the MAC frame as described above. For example, the device search unit 209 describes “2.4 GHz, 5 GHz, 60 GHz” in the communication frequency band 703 using the value of the communication frequency band 1003. Accordingly, it is indicated that the wireless communication device 200 can perform communication using either Wi-Fi or WiGig. That is, the communication frequency band 703 indicates a frequency band that can be used by the wireless communication apparatus 200. Note that the communication frequency band 703 may include roll information. In this case, the communication frequency band 703 is described as, for example, “60 GHz, STA only” or “60 GHz, PCP only”.

  The Device Password ID 702 is a parameter that can identify whether or not the beacon is for WPS. For example, as shown in FIG. 6, Device Password ID 702 is described as “0x0004”. In this case, the wireless communication device 100 that has received the beacon can be identified as a WPS mode called Push Button Configuration (PBC).

  The SSID 701 is an identifier of the own device (here, the wireless communication device 200) that operates as a PCP.

  This completes the description of the format example of the WPS beacon.

  In step S504, the connection unit 110 transmits a probe request that is a connection request and receives a probe response that is a response with the wireless communication apparatus 200. Details of this step are described below.

  First, the connection unit 110 inputs a device search result (search success), partner device information, host device information 116, and setting information 115. Next, connection section 110 generates a probe request, which is a connection request, based on self apparatus information 116 and setting information 115 and transmits the probe request to radio communication apparatus 200. This probe request transmission corresponds to step S604 in FIG. Details of the probe request will be described later.

  After that, the connection unit 110 receives a probe response that is a response to the connection request from the wireless communication apparatus 200 (corresponding to step S605 in FIG. 5). Connection unit 110 then transmits an association request to radio communication apparatus 200 (corresponding to step S606 in FIG. 5).

  When connection unit 110 receives an association response from radio communication apparatus 200 (corresponding to step S607 in FIG. 5), connection between radio communication apparatus 100 and radio communication apparatus 200 is completed. Then, the connection unit 110 outputs the partner device information, the own device information 116, and the setting information 115 to the authentication key exchange determination unit 111.

  In step S524, the connection unit 210 receives a probe request that is a connection request and transmits a probe response that is a response to the wireless communication apparatus 100. Details of this step are described below.

  First, the connection unit 210 inputs the setting information 215 and the own device information 216. Next, when the probe unit 210 does not receive a probe request from the periphery for a certain period of time (S524: no response), the connection unit 210 outputs a control signal for stopping the transmission of the WPS beacon to the device search unit 209. Then, the connection unit 210 outputs a device search result indicating that the search result is unsuccessful to the role determination unit 208. Thereby, the connection part 210 returns to step S522. Then, the role determination unit 208 again determines the role of the own device.

  On the other hand, when a probe request is received from the surroundings for a certain period, the connection unit 210 generates partner apparatus information based on the parameters included in the probe request. This partner device information includes at least the MAC address and communication frequency band of the communication partner that has been searched.

  Thereafter, the connection unit 210 that has received the probe request generates a probe response that is a response to the probe request, and transmits the probe response to the wireless communication apparatus 100 (corresponding to S605 in FIG. 5). Then, the connection unit 210 receives an association request from the wireless communication device 100 (corresponding to S606 in FIG. 5). Then, connection section 210 generates an association response as a response to the received association request, and transmits it to radio communication apparatus 100 (corresponding to S607 in FIG. 5).

  When the wireless communication device 100 receives the association response, the connection between the wireless communication device 100 and the wireless communication device 200 is completed. Thereafter, the connection unit 210 outputs the generated partner device information, host device information 216, and setting information 215 to the authentication key exchange determination unit 211.

  Here, an example format of the probe request will be described. FIG. 7 is a diagram illustrating an example of a format of a probe request.

  As shown in FIG. 7, the probe request includes a MAC address 801, a Device Password ID 802, and a communication frequency band 803 as parameters. The Device Password ID 802 and the communication frequency band 803 have the same meaning as the Device Password ID 702 and the communication frequency band 703 of the WPS beacon described with reference to FIG.

  The MAC address 801 is the MAC address of the device that transmitted the probe request, that is, the wireless communication device 100.

  This is the end of the description of the probe request format example.

  In step S505, the authentication key exchange determination unit 111 determines whether authentication key exchange is necessary. Details of this step are described below. Note that, as described above, the authentication key exchange means that authentication keys used for WPA are exchanged between the wireless communication apparatus 100 and the wireless communication apparatus 200. The authentication key exchanged at that time is an authentication key when the communication partner is a PCP. Since the authentication key is included in the setting information, the exchange of the authentication key can also be referred to as “setting information exchange”.

  First, the authentication key exchange determination unit 111 inputs partner device information, host device information 116, and setting information 115.

  Next, the authentication key exchange determination unit 111 determines whether or not “60 GHz” is included in the communication frequency band of the counterpart device information. The communication frequency band used for this determination is the value of the communication frequency band 703 included in the WPS beacon received by the wireless communication apparatus 100.

  As a result of the determination, when the description “60 GHz” is included in the communication frequency band, the authentication key exchange determination unit 111 refers to the communication frequency band 1001 and the roll information 1002 of the own apparatus information 116. As a result, when the communication frequency band 1001 includes the description “60 GHz” and the roll information 1002 includes the description “both STA and PCP OK”, the authentication key exchange determination unit 111 requires authentication key exchange. (S505: YES). The authentication key exchange determination unit 111 proceeds to step S506.

  In step S506, the authentication key exchange determination unit 111 changes the authentication key exchange flag to True, and sets the flag to a raised state. Note that the authentication key exchange flag is held in, for example, the memory of the calculation unit 102 or the storage unit 103, and the default state is False.

  On the other hand, as a result of the determination, if the communication frequency band does not include “60 GHz”, the authentication key exchange determination unit 111 determines that there is no need to perform authentication key exchange (S505: NO). Therefore, the authentication key exchange determination unit 111 does not change the authentication key exchange flag and leaves it as False, leaving the flag not set. When the authentication key exchange flag is False and the authentication key exchange determination unit 111 determines that Wi-Fi communication is possible, WPS can be performed.

  When the above determination is completed, the authentication key exchange determination unit 111 outputs the counterpart device information, the setting information 115, and the own device information 116 to the secret key sharing unit 112. Further, the authentication key exchange determination unit 111 outputs an authentication key exchange flag to the authentication key exchange unit 113.

  In step S525, the authentication key exchange determination unit 211 determines whether authentication key exchange is necessary. Details of this step are described below.

  First, the authentication key exchange determination unit 211 inputs partner device information, host device information 216, and setting information 215.

  Next, the authentication key exchange determination unit 211 determines whether or not the description “60 GHz” is included in the communication frequency band of the partner apparatus information. The communication frequency band used for this determination is the value of the communication frequency band 803 included in the probe request received by the wireless communication apparatus 200.

  As a result of the determination, when the description “60 GHz” is included in the communication frequency band, the authentication key exchange determination unit 211 refers to the communication frequency band 1003 and roll information 1004 of the own apparatus information 216. As a result, when the communication frequency band 1003 includes the description “60 GHz” and the roll information 1004 includes the description “both STA and PCP OK”, the authentication key exchange determination unit 211 requires the authentication key exchange. (S525: YES). The authentication key exchange determination unit 211 proceeds to step S526.

  In step S526, the authentication key exchange determination unit 211 changes the authentication key exchange flag to True so that the flag is set. Note that the authentication key exchange flag is held in, for example, the memory of the calculation unit 202 or the storage unit 203, and the default state is False.

  On the other hand, as a result of the determination, if the communication frequency band does not include “60 GHz”, the authentication key exchange determination unit 211 determines that there is no need to perform authentication key exchange (S525: NO). Therefore, the authentication key exchange determination unit 211 does not change the authentication key exchange flag and leaves it as False, leaving the flag unset. When the authentication key exchange flag is False and the authentication key exchange determination unit 211 determines that Wi-Fi communication is possible, WPS can be performed.

  When the above determination is completed, the authentication key exchange determination unit 211 outputs the partner device information, the setting information 215, and the own device information 216 to the secret key sharing unit 212. Further, the authentication key exchange determination unit 211 outputs an authentication key exchange flag to the authentication key exchange unit 213.

  In step S507, the secret key sharing unit 112 inputs the counterpart device information, the own device information 116, and the setting information 115. Then, the secret key sharing unit 112 generates a secret key and shares the generated secret key with the wireless communication device 200. In step S527, the secret key sharing unit 212 inputs the counterpart device information, the own device information 216, and the setting information 215. The secret key sharing unit 212 generates a secret key and shares the generated secret key with the wireless communication device 100.

  The secret key is a key for encrypting the authentication key. In addition, as a method for generating and sharing a secret key, for example, a DH (Diffie-Hellman) key sharing protocol is used in a procedure compliant with WSC. Transmission / reception using the DH key sharing protocol corresponds to steps S608 to S617 in FIG.

  The secret key sharing unit 112 outputs the secret key, partner device information, own device information 116, and setting information 115 to the authentication key exchanging unit 113. Similarly, the secret key sharing unit 212 outputs the secret key, partner device information, host device information 216, and setting information 215 to the authentication key exchanging unit 213.

  In step S508, the authentication key exchange unit 113 receives the secret key, partner device information, own device information 116, setting information 115, and authentication key exchange flag, and determines whether or not the authentication key exchange flag is set. .

  As a result of the determination, if the authentication key exchange flag is False and the flag is not set (S508: NO), the authentication key exchange unit 113 proceeds to step S511.

  On the other hand, as a result of the determination, if the authentication key exchange flag is True and the flag is set (S508: YES), the authentication key exchange unit 113 proceeds to Step S509.

  In step S509, the authentication information exchanging unit 113 encrypts the authentication key [1] 406, the SSID 403, the authentication method 404, the encryption method 405, and the MAC address 407 based on the setting information 115 using the secret key. . That is, the authentication information exchanging unit 113 encrypts its own PCP setting information 402 with the secret key. As described above, authentication key [1] 406 is an authentication key used for WPA when wireless communication apparatus 100 is PCP.

  In step S510, the authentication information exchanging unit 113 sends the encrypted authentication key [1] 406, SSID 403, authentication method 404, encryption method 405, and MAC address 407 to the wireless communication apparatus 200 via the communication unit 104. Send. This transmission corresponds to step S618 in FIG.

  In step S528, the authentication key exchange unit 213 inputs the secret key, partner device information, own device information 216, setting information 215, and authentication key exchange flag, and determines whether or not the authentication key exchange flag is set. .

  As a result of the determination, if the authentication key exchange flag is False and the flag is not set (S528: NO), the authentication key exchange unit 213 proceeds to Step S531.

  On the other hand, as a result of the determination, if the authentication key exchange flag is True and the flag is set (S528: YES), the authentication key exchange unit 213 proceeds to Step S529.

  In step S529, the authentication key exchanging unit 213 transmits the encrypted authentication key [1] 406, SSID 403, authentication method 404, encryption method 405, and MAC address from the wireless communication apparatus 100 via the communication unit 204. 407 is received. The reception here corresponds to step S618 in FIG. In step S529, the authentication information exchanging unit 213 decrypts the authentication key [1] 406, the SSID 403, the authentication method 404, the encryption method 405, and the MAC address 407 using the secret key.

  In step S530, the authentication key exchange unit 213 stores the decrypted authentication key [1] 406 for each SSID 403 in the storage unit 203 together with the authentication method 404, the encryption method 405, and the MAC address 407. The information stored in this way is handled as the partner PCP setting location information 458 of the setting information 215. This step corresponds to step S619 in FIG. Note that storing the MAC address 407 is not essential.

  In step S531, the authentication key exchange unit 213 encrypts the authentication key [2] 456, the SSID 453, the authentication method 454, the encryption method 455, and the MAC address 457 based on the setting information 215 using the secret key. . That is, authentication information exchanging section 213 encrypts its own PCP setting information 452 using a secret key. The authentication key [2] 456 is an authentication key used for WPA when the wireless communication apparatus 200 is PCP.

  In step S532, the authentication key exchange unit 213 sends the encrypted authentication key [2] 456, SSID 453, authentication method 454, encryption method 455, and MAC address 457 to the wireless communication device 100 via the communication unit 204. Send. This transmission corresponds to step S620 in FIG.

  Then, the authentication key exchanging unit 213 outputs the exchange result (success) to the cutting unit 214.

  In step S511, the authentication key exchanging unit 113 receives the encrypted authentication key [2] 456, SSID 453, authentication method 454, encryption method 455, and MAC address 457 via the communication unit 104. The reception here corresponds to step S620 in FIG. In step S511, the authentication information exchange unit 113 decrypts the authentication key [2] 456, the SSID 453, the authentication method 454, the encryption method 455, and the MAC address 457 using the secret key.

  In step S 512, the authentication key exchanging unit 113 stores the decrypted authentication key [2] 456, SSID 453, authentication method 454, encryption method 455, and MAC address 457 for each SSID 453 in the storage unit 103. The information stored in this way is handled as the partner PCP setting location information 408 of the setting information 115. This step corresponds to step S621 in FIG. Note that storing the MAC address 407 is not essential. Further, this step may be executed at a timing after WPS.

  Then, the authentication key exchanging unit 113 outputs the exchange result (success) to the cutting unit 114.

  In step S513, when the disconnection unit 114 inputs the exchange result (success), the disconnection message is transmitted / received to / from the disconnection unit 214 of the wireless communication apparatus 200 via the communication unit 104, and the communication is disconnected. To do. In step S533, when the disconnection unit 214 inputs the exchange result (success), the disconnection message is transmitted / received to / from the disconnection unit 114 of the wireless communication apparatus 100 via the communication unit 204, and the communication is disconnected. To do. These steps S513 and S533 correspond to steps S622, S623, and S624 in FIG.

  In step S514, the wireless communication device 100 ends WPS. In step S534, the wireless communication apparatus 200 ends WPS.

  With such an operation, in the wireless communication apparatus 100, the authentication key exchange determination unit 111 sets an authentication key exchange flag when both the wireless communication apparatus 100 and the wireless communication apparatus 200 are communicable with WiGig. Then, when the authentication key exchange flag is set, the authentication key exchange unit 113 exchanges the WPA authentication key between the wireless communication device 100 and the wireless communication device 200. As a result, the wireless communication device 100 and the wireless communication device 200 can hold the WPA authentication key when the communication partner is PCP. Therefore, radio communication apparatus 100 and radio communication apparatus 200 according to the present embodiment can be connected regardless of which becomes STA or PCP when WPA is executed. That is, the wireless communication device 100 and the wireless communication device 200 according to the present embodiment can be connected even if the role of each wireless communication device changes between when WPS is executed and when WPA is executed.

<Modification of Embodiment 1>
Although the present embodiment has been described above, the above description is merely an example, and various modifications can be made. Hereinafter, modified examples will be described.

  Although cases have been described with the above embodiment as examples where the present invention is configured by hardware, the present invention can also be realized by software in cooperation with hardware. FIG. 8 shows an example of this configuration.

  The configuration example 1 in FIG. 8 is a configuration in which the wireless communication apparatus 100 can be connected to a communication device 300 that enables WiGig communication. The wireless communication device 100 includes middleware 130 and a driver 140, and the middleware 130 includes a communication setting control unit 131. The communication setting control unit 131 includes each unit included in the calculation unit 102 shown in FIG. That is, in the configuration example 1, each unit of the calculation unit 102 is realized as the middleware 130. The communication setting control unit 131 controls the communication unit 301 of the communication device 300 via the driver 140 and performs WiGig communication. The middleware 130 may be an application. Further, the communication setting control unit 131 may be provided in the driver 140.

  The configuration example 2 in FIG. 8 is a configuration in which the wireless communication apparatus 100 can be connected to a communication device 300 that enables WiGig communication. However, the communication setting control unit 131 of the configuration example 2 is different from the configuration example 1 in that the communication setting control unit 131 is provided on the communication device 300 side. The communication setting control unit 131 receives a request from the middleware 130 via the driver 140 and controls the communication unit 301 to perform WiGig communication. The middleware 130 may be an application.

  In the above embodiment, an example in which the roll information 1002 and 1004 is “both STA and PCP OK” has been described. Here, an example in which the role information is “PCP only” or “STA only” will be supplementarily described.

  For example, when the role information 1004 is “PCP only”, the wireless communication device 200 is a PCP and the wireless communication device 100 is an STA. Therefore, in this case, only the authentication key is transmitted from the wireless communication apparatus 200 to the wireless communication apparatus 100, and the authentication key is not transmitted from the wireless communication apparatus 100 to the wireless communication apparatus 200.

  For example, when the role information 1004 is “STA only”, the wireless communication device 100 is a PCP and the wireless communication device 200 is a STA. Therefore, in this case, only the authentication key is transmitted from the wireless communication apparatus 100 to the wireless communication apparatus 200, and the authentication key is not transmitted from the wireless communication apparatus 200 to the wireless communication apparatus 100.

  For example, when the role information 1002 is “PCP only”, the wireless communication device 100 is a PCP and the wireless communication device 200 is a STA. Therefore, in this case, only the authentication key is transmitted from the wireless communication apparatus 100 to the wireless communication apparatus 200, and the authentication key is not transmitted from the wireless communication apparatus 200 to the wireless communication apparatus 100.

  For example, when the role information 1002 is “STA only”, the wireless communication device 200 is a PCP and the wireless communication device 100 is a STA. Therefore, in this case, only the authentication key is transmitted from the wireless communication apparatus 200 to the wireless communication apparatus 100, and the authentication key is not transmitted from the wireless communication apparatus 100 to the wireless communication apparatus 200.

  For example, when the role information 1002 and 1004 are both “STA only” or “PCP only”, the wireless communication apparatuses 100 and 200 do not communicate directly. Therefore, the authentication key is not transmitted.

  For example, when the roll information 1004 is “PCP only” or the roll information 1002 is “STA only”, the wireless communication device 100 and the wireless communication device 200 operate as follows. The wireless communication device 200 operates only as a PCP. Since the wireless communication apparatus 100 can determine that its own apparatus operates only as an STA, it determines that an authentication key exchange is not necessary. Thus, in the present embodiment, only the authentication key is transmitted from the wireless communication apparatus 200 to the wireless communication apparatus 100. When the wireless communication apparatus is a stationary type, the roll information may be “PCP only”. Examples of the stationary device include an access point, a television, a recorder, and various terminal devices installed in the public. On the other hand, when the wireless communication device is portable, the roll information may be “STA only”. Examples of the portable device include a mobile phone, a smartphone, and a tablet.

  Further, the timings for determining whether or not authentication key exchange is necessary (S505 and S525 in FIG. 4) and the timings for exchanging authentication keys (S510 and S532 in FIG. 4) described in the above embodiment are shown in FIG. It is not limited.

The determination of whether or not authentication key exchange is necessary can be performed at a timing that satisfies the following conditions.
-It is possible to determine whether or not the authentication key exchange is necessary after the communication partner can be identified. That is, after receiving the WPS beacon and receiving the connection request (Probe request), it is possible to determine whether or not authentication key exchange is necessary.
-While data transmission is possible, it is possible to determine whether or not authentication key exchange is necessary. That is, it is possible to determine whether or not the authentication key exchange is necessary before the communication is disconnected.
-It is possible to determine whether or not it is necessary to exchange the authentication key before the authentication key is distributed from the STA wireless communication device to the PCP wireless communication device.

The authentication key can be exchanged at a timing that satisfies the following conditions.
・ After sharing the private key, the authentication key can be exchanged.
・ The authentication key can be exchanged before the end packet is transmitted. An example of the end packet is a message for disconnection shown in S622 to S624 in FIG.

  In the above-described embodiment, the example in which the authentication key is transmitted from the wireless communication apparatus 100 to the wireless communication apparatus 200 first (S510 in FIG. 4) has been described. In the present embodiment, the authentication key may be transmitted from wireless communication apparatus 200 to wireless communication apparatus 100 (S532 in FIG. 4) first.

  In the above embodiment, when a message is not added to the existing WPS protocol, the authentication key is transmitted from the wireless communication apparatus 100 as the STA to the wireless communication apparatus 200 as the PCP in M7 shown in FIG. You may go ahead by message.

(Embodiment 2)
In the first embodiment, the case where the authentication key exchange is realized by one WPS has been described. In this embodiment, the authentication key exchange is realized by two WPSs.

  Hereinafter, an example of communication setting operation between the communication system according to the present embodiment, that is, the wireless communication device 100 and the wireless communication device 200 will be described with reference to FIG. FIG. 9 is a flowchart illustrating an example of a communication setting operation performed by the wireless communication device 100 and the wireless communication device 200.

  In steps S901 and S911, the wireless communication device 100 and the wireless communication device 200 each start WPS. The start of WPS here is triggered by the operation performed by the user described in the first embodiment, for example.

  In steps S902 and S912, the wireless communication device 100 and the wireless communication device 200 each exchange information, and determine whether authentication key exchange is necessary based on the exchanged information. The information is, for example, the communication frequency band and the MAC address of the own device. The communication frequency band is the same as the communication frequency bands 1001 and 1003 shown in FIG. 3 described in the first embodiment. Further, the MAC address of the own device is the same as the MAC addresses 407 and 457 shown in FIG. Therefore, each of wireless communication apparatus 100 and wireless communication apparatus 200 is based on the communication frequency band, whether or not WiGig communication is possible, that is, whether authentication key exchange is necessary, as in the first embodiment. Judging.

  As a result of the determination, if it is determined that authentication key exchange is necessary, the wireless communication device 100 and the wireless communication device 200 set a role change flag, hold connection partner information, and proceed to steps S903 and S913. The role change flag is a flag for changing the role determined in steps S903 and S913 in steps S905 and S915. The connection partner information is information for limiting the connection partner in steps S906 and S916. The connection partner information includes, for example, the MAC address of the connection partner obtained from the exchanged information.

  In steps S903 and S913, the wireless communication devices 100 and 200 each determine their own role. Here, as an example, radio communication apparatus 100 is determined to be STA, and radio communication apparatus 200 is determined to be PCP.

  In steps S904 and S914, the wireless communication device 100 and the wireless communication device 200 each perform WPS. The WPS here is a conventionally known WPS. As a result of WPS, the wireless communication device 200 transmits an authentication key to the wireless communication device 100. This authentication key is the authentication key [2] 456 described in the first embodiment, and is an authentication key used for WPA when the wireless communication apparatus 200 is a PCP.

  In steps S905 and S915, each of the wireless communication devices 100 and 200 changes the role of the own device determined in steps S903 and S913 because the role change flag is set. That is, radio communication apparatus 100 changes from STA to PCP. On the other hand, the wireless communication apparatus 200 changes from PCP to STA.

  In steps S <b> 906 and S <b> 916, the wireless communication apparatuses 100 and 200 each perform communication by limiting the connection partner based on the held connection partner information. That is, the wireless communication apparatus 100 performs communication by limiting the connection partner to the wireless communication apparatus 200. On the other hand, the wireless communication device 200 performs communication by limiting the connection partner to the wireless communication device 100.

  In steps S907 and S917, the wireless communication device 100 and the wireless communication device 200 each perform WPS. The WPS here is a conventionally known WPS. As a result of WPS, the wireless communication apparatus 100 transmits an authentication key to the wireless communication apparatus 200. This authentication key is the authentication key [1] 406 described in the first embodiment, and is an authentication key used for WPA when the wireless communication apparatus 100 is a PCP.

  In steps S908 and S918, wireless communication apparatus 100 and wireless communication apparatus 200 each end WPS.

  As described above, the wireless communication apparatus 100 and the wireless communication apparatus 200 according to the present embodiment exchange the authentication key for WPA by limiting the role as a connection partner and changing the role when both can communicate with WiGig. As a result, the wireless communication device 100 and the wireless communication device 200 according to the present embodiment can hold the authentication key for WPA when the communication partner is PCP. Therefore, the wireless communication device 100 and the wireless communication device 200 can be connected regardless of which is STA or PCP when WPA is executed. That is, the wireless communication device 100 and the wireless communication device 200 can be connected even if the role of each wireless communication device changes between when WPS is executed and when WPA is executed.

  As described above, the wireless communication device of the present invention is a wireless communication device that performs communication settings for performing wireless communication using millimeter waves with other wireless communication devices, and information related to wireless communication performed by the device itself. And based on the information about the wireless communication performed by the other wireless communication device, whether or not both the own device and the other wireless communication device are capable of wireless communication using millimeter waves, Authentication key exchange determination unit for determining whether or not it is necessary to exchange authentication keys between each other and authentication with the other wireless communication device based on the determination result of the authentication key exchange determination unit And an authentication key exchange unit for exchanging keys.

  The wireless communication device of the present invention further includes a device search unit that receives a beacon including a communication frequency band that can be used by the other wireless communication device, and the authentication key exchange determination unit includes the other wireless communication device. Based on the communication frequency band that can be used by the apparatus and the communication frequency band that the own apparatus can use and that can be used by the own apparatus, both the own apparatus and the other wireless communication apparatus use millimeter waves. It is determined whether or not it is necessary to exchange authentication keys with the other wireless communication devices depending on whether or not communication is possible.

  The wireless communication device of the present invention further includes a connection unit that receives a connection request including a communication frequency band that can be used by the other wireless communication device, and the authentication key exchange determination unit includes the other wireless communication device. Based on the communication frequency band that the device can use and the tsushin frequency band that the device itself can use, both the device and the other wireless communication device used millimeter waves. It is determined whether or not an authentication key needs to be exchanged with the other wireless communication device depending on whether wireless communication is possible.

  The wireless communication device of the present invention outputs a result of determining whether or not an authentication key needs to be exchanged with the other wireless communication device as an authentication key exchange flag, and The exchange unit exchanges an authentication key with the other wireless communication device based on the authentication key exchange flag from the authentication key exchange determination unit. In the wireless communication apparatus of the present invention, the wireless communication using the millimeter wave is wireless communication using WiGig.

  The present invention is useful as a wireless communication device, a communication device, a wireless communication method, and a wireless communication control program for performing communication settings for performing millimeter-wave wireless communication with other wireless communication devices.

100, 200 Wireless communication device 102, 202 Arithmetic unit 103, 203 Storage unit 104, 204, 301 Communication unit 105, 205 Display unit 106, 206 Operation unit 107, 207 Setting start unit 108, 208 Role determination unit 109, 209 Device search Unit 110, 210 Connection unit 111, 211 Authentication key exchange determination unit 112, 212 Secret key sharing unit 113, 213 Authentication key exchange unit 114, 214 Disconnection unit 115, 215 Setting information 116, 216 Self-device information 130 Middleware 131 Communication setting control Part 140 Driver 300 Communication device

Claims (8)

A wireless communication device that performs communication settings for performing wireless communication using millimeter waves with other wireless communication devices,
Based on whether information regarding wireless communication performed by the own device and information regarding wireless communication performed by the other wireless communication device is enabled, whether both the device and the other wireless communication device are capable of wireless communication using millimeter waves. An authentication key exchange determination unit for determining whether or not an authentication key needs to be exchanged with the other wireless communication device;
An authentication key exchange unit for exchanging an authentication key with the other wireless communication device based on a determination result of the authentication key exchange determination unit;
A wireless communication device comprising: A device search unit that receives a beacon including a communication frequency band that can be used by the other wireless communication device;
The authentication key exchange determination unit
Based on the communication frequency band that can be used by the other wireless communication apparatus and the communication frequency band that the own apparatus can use and that can be used by the own apparatus, both the own apparatus and the other wireless communication apparatus are in millimeters. Determining whether or not it is necessary to mutually exchange an authentication key with the other wireless communication device depending on whether wireless communication using waves is possible or not,
The wireless communication apparatus according to claim 1. A connection unit that receives a connection request including a communication frequency band that can be used by the other wireless communication device;
The authentication key exchange determination unit
Based on the communication frequency band that can be used by the other wireless communication apparatus and the communication frequency band that the own apparatus can use and that can be used by the own apparatus, both the own apparatus and the other wireless communication apparatus are in millimeters. Determining whether or not it is necessary to mutually exchange an authentication key with the other wireless communication device depending on whether wireless communication using waves is possible or not,
The wireless communication apparatus according to claim 1. The authentication key exchange determination unit
The result of determining whether or not it is necessary to exchange authentication keys with the other wireless communication device is output as an authentication key exchange flag,
The authentication key exchange unit
Based on the authentication key exchange flag from the authentication key exchange determination unit, exchange an authentication key with the other wireless communication device,
The wireless communication apparatus according to claim 1. The wireless communication using the millimeter wave is wireless communication using WiGig.
The wireless communication apparatus according to claim 1. A communication device that connects to a wireless communication device that performs wireless communication using millimeter waves with another wireless communication device and performs communication settings for executing the wireless communication,
Based on information related to wireless communication performed by the wireless communication device and information related to wireless communication performed by the other wireless communication device, both the wireless communication device and the other wireless communication device can perform wireless communication using millimeter waves. An authentication key exchange determination unit that determines whether or not it is necessary to exchange authentication keys between the wireless communication device and the other wireless communication device,
An authentication key exchange unit for exchanging an authentication key between the wireless communication device and the other wireless communication device based on a determination result of the authentication key exchange determination unit;
Communication device equipped with. A wireless communication method performed by a wireless communication device that performs communication settings for performing wireless communication using millimeter waves with other wireless communication devices,
Based on whether information regarding wireless communication performed by the own device and information regarding wireless communication performed by the other wireless communication device is enabled, whether both the device and the other wireless communication device are capable of wireless communication using millimeter waves. Determining whether an authentication key needs to be exchanged with the other wireless communication device; and
Exchanging an authentication key with the other wireless communication device based on the result of the determination;
A wireless communication method. A wireless communication control program to be executed by a computer of a wireless communication device that performs communication settings for performing wireless communication using millimeter waves with another wireless communication device,
Based on whether information regarding wireless communication performed by the own device and information regarding wireless communication performed by the other wireless communication device is enabled, whether both the device and the other wireless communication device are capable of wireless communication using millimeter waves. Determining whether or not it is necessary to exchange authentication keys with the other wireless communication devices;
A process of exchanging an authentication key with the other wireless communication device based on the result of the determination;
A wireless communication control program for executing

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