JP2023111421A - Communication apparatus, computer program for communication apparatus, and application program for terminal device - Google Patents

Abstract

To provide a technique for improving convenience for a user.SOLUTION: A communication apparatus repeatedly transmits, via a first wireless interface for executing wireless communication based on Bluetooth standard, a first advertising signal including identification information identifying the communication apparatus. The communication apparatus causes, when a specific signal received from a first external device includes identification information, an output unit to output a specific image obtained with a public key of the communication apparatus. When the specific signal does not include the identification information, the specific image is not output. After the specific image is output, when receiving an authentication request with the public key from the first external device via a second wireless interface for executing wireless communication based on Wi-Fi standard, the communication apparatus establishes a wireless connection between the communication apparatus and a second external device.SELECTED DRAWING: Figure 3

Description

This specification discloses techniques for establishing a wireless connection according to the Wi-Fi standard between a communication device and another device.

Patent Document 1 discloses a technique for establishing a Wi-Fi connection between a printer and an AP (abbreviation of Access Point) using a terminal according to the DPP (abbreviation of Device Provisioning Protocol) system. When receiving the Advertise signal from the terminal, the printer displays a QR code obtained by encoding the public key. The terminal obtains the public key by reading the QR code. The terminal then uses the public key to establish a Wi-Fi connection between the printer and the AP.

JP 2021-57713 A

"Device Provisioning Protocol Specification Version 1.1.13" Wi-Fi Alliance, 2019

This specification provides a technique for improving convenience for the user of a communication device.

The communication device disclosed in this specification includes a first wireless interface for performing wireless communication according to the Bluetooth standard and a second wireless interface for performing wireless communication according to the Wi-Fi standard. , an output unit, a first advertising signal transmitting unit that repeatedly transmits a first advertising signal including identification information for identifying the communication device via the first wireless interface, the first wireless interface or a specific signal receiving unit for receiving a specific signal from a first external device via the second wireless interface; and a public key of the communication device when the specific signal includes the identification information. an output control unit configured to output a specific image to the output unit, the output control unit not outputting the specific image when the specific signal does not include the identification information; an authentication request receiving unit that receives an authentication request using the public key from the first external device via the second wireless interface; and an authentication request receiving unit that receives the authentication request from the first external device. an authentication response transmission unit configured to transmit an authentication response to the first external device via the second wireless interface when the authentication response is transmitted to the first external device; a connection information receiving unit that receives connection information from the first external device via a second wireless interface; and a connection information receiving unit that uses the connection information when the connection information is received from the first external device and an establishing unit that establishes a wireless connection between the communication device and a second external device via the second wireless interface.

According to the above configuration, the communication device transmits the first advertising signal containing the identification information, and outputs the specific image obtained using the public key when the received specific signal contains the identification information. . On the other hand, the communication device does not output the specific image when the received specific signal does not contain identification information, that is, when the specific signal is not addressed to itself. Therefore, it is possible to improve convenience for the user of the communication device.

This specification also discloses an application program for the terminal device. The terminal device includes a first wireless interface for performing wireless communication according to the Bluetooth standard, a second wireless interface for performing wireless communication according to the Wi-Fi standard, a camera, an OS ( (Operating System) program, and a computer. The application program directs the computer from a first communication device via the following units, i.e., the first wireless interface, to a first communication device including first identification information that identifies the first communication device. and a first advertising signal receiving unit that receives the advertising signal from the first communication device, through the first wireless interface or the second wireless interface when the first advertising signal is received from the first communication device a specific signal transmission unit for transmitting a specific signal including the first identification information to the first communication device; a public key acquisition unit for acquiring the public key when a specific image obtained using the public key of the communication device of is output by the first communication device and the specific image is captured by the camera; and a supply unit that supplies a predetermined instruction including the public key to the OS program. When the predetermined instruction is obtained from the application program, the OS program transmits an authentication request using the public key to the first communication device via the second wireless interface, and receiving an authentication response from the first communication device via the second wireless interface when an authentication request is transmitted to the first communication device, and receiving the authentication response from the first communication device If received, connection information may be transmitted to the first communication device via the second wireless interface. The connection information may be information for establishing wireless connection according to the Wi-Fi standard between the first communication device and another device.

According to the above configuration, the terminal device receives the first advertising signal including the first identification information from the first communication device, and transmits the specific signal including the first identification information to the first communication device. do. A specific image is output by the first communication device because the specific signal includes the first identification information. Even if the specific signal is received by a second communication device different from the first communication device, the specific image is output by the second communication device because the specific signal does not include the identification information of the second communication device. not. Therefore, it is possible to improve convenience for the user of the second communication device.

A computer program for implementing the above communication device and a computer-readable storage medium storing the computer program are also novel and useful. The method implemented by the above communication device is also novel and useful. Also novel and useful are a computer-readable storage medium storing the above application program, the terminal device itself implemented by the application program, and the method executed by the terminal device. Furthermore, a communication system comprising the communication device described above and other devices (eg, a first external device, a second external device, etc.) is also new and useful.

1 shows the configuration of a communication system; FIG. 4 shows a sequence diagram of processing executed by each device; FIG. 3 shows a sequence diagram continued from FIG. 2 ; FIG. 4 shows a sequence diagram continuing from FIG. 3 ; FIG. FIG. 5 shows a sequence diagram continued from FIG. 4 ; FIG. 6 shows a sequence diagram continued from FIG. 5 ;

(Example)
(Configuration of communication system 2; Fig. 1)
As shown in FIG. 1, the communication system 2 includes a plurality of mobile terminals 10 and 20, a plurality of printers 100 and 200, and a plurality of APs (Access Points) 41 and . The technology of this embodiment utilizes a mobile terminal (eg 10) to establish a wireless connection (hereinafter referred to as “Wi-Fi connection ”) is established. In the following, mobile terminals are simply referred to as "terminals".

Terminal 10, AP 41, and printer 100 are arranged in first area A1. The terminal 10 has established a Wi-Fi connection with the AP41. Terminal 20, AP 42, and printer 200 are arranged in the second area A2. Terminal 20 has established a Wi-Fi connection with AP 42 . A first area A1 is an area managed by a first administrator, and a second area A2 is an area managed by a second administrator different from the first administrator. For example, the first area A1 is a room in one family in an apartment building, and the second area A2 is a room in another family in the same apartment building (for example, the next room). The distance between the terminal 10 and the printer 100 is shorter than the distance between the terminal 10 and the printer 200, and the distance between the terminal 20 and the printer 200 is longer than the distance between the terminal 20 and the printer 100. short.

(Configuration of printers 100 and 200)
The printer 100 is a peripheral device capable of executing a print function (for example, a peripheral device of the terminal 10). In a modified example, the printer 100 may be a multi-function machine capable of executing a scanning function, a FAX function, etc. in addition to the printing function. The model name of the printer 100 is "M1" and the serial number of the printer 100 is "SN1".

The printer 100 includes an operation unit 112 , a display unit 114 , a Wi-Fi interface 116 , a BT (abbreviation for Bluetooth (registered trademark)) interface 117 , a print execution unit 118 , and a control unit 130 . Each unit 112 to 130 is connected to a bus line (reference numerals omitted). Below, the interface is described as "I/F".

The operation unit 112 has a plurality of keys. A user can input various instructions to the printer 100 by operating the operation unit 112 . The display unit 114 is a display that displays various information. The display unit 114 also functions as a so-called touch panel (that is, an operation unit that receives user operations). The print execution unit 118 includes a printing mechanism such as an inkjet method or a laser method.

A Wi-Fi I/F 116 is a wireless I/F for executing Wi-Fi communication according to the Wi-Fi standard. The Wi-Fi standard is, for example, the IEEE (abbreviation of The Institute of Electrical and Electronics Engineers, Inc.) 802.11 standard and standards conforming thereto (eg 802.11a, 11b, 11g, 11n, 11ac, etc.) is a wireless communication standard for performing wireless communications in accordance with. In particular, the Wi-Fi I/F 116 supports the DPP (abbreviation for Device Provisioning Protocol) system established by the Wi-Fi Alliance. Details of the DPP method are described in the standard document "Device Provisioning Protocol Specification Version 1.1.13" created by the Wi-Fi Alliance.

A BTI/F 117 is an I/F for executing wireless communication according to the BT standard. The BT standard is, for example, a wireless communication system based on the IEEE802.15.1 standard and standards conforming thereto. The BTI/F 117 is an I/F defined in version 5 or later of the BT standard. Extension advertising signals (so-called advertising extensions) have been adopted since version 5 of the BT standard. The size of data that can be included in the extended advertising signal is larger than the size of data that can be included in the normal advertising signal. For this reason, the BTI/F 117 can transmit relatively large size data (for example, model name “M1”, serial number “SN1”, SSID described later, etc.) using an extended advertising signal. The advertising signal is hereinafter referred to as an "AD signal".

Control unit 130 includes CPU 132 and memory 134 . CPU 132 executes various processes according to programs 136 stored in memory 134 . The memory 134 is composed of a volatile memory, a nonvolatile memory, or the like.

A hardware configuration (not shown) of the printer 200 is similar to that of the printer 100 . That is, the printer 200 has a BTI/F defined by the BT standard version 5 or later, and a Wi-Fi I/F that supports the DPP method. The model name of printer 200 is "M2", and the serial number of printer 100 is "SN2".

(Configuration of terminals 10 and 20)
The terminal 10 is a portable terminal device such as a mobile phone (for example, smart phone), PDA, tablet PC, or the like. In a modification, the terminal 10 may be a stationary PC, a notebook PC, or the like. The terminal 10 includes an operation unit 12 , a display unit 14 , a Wi-Fi I/F 16 , a BTI/F 17 , a camera 18 and a control unit 30 . Each unit 12 to 30 is connected to a bus line (reference numerals omitted).

The operation unit 12 has a plurality of keys. A user can input various instructions to the terminal 10 by operating the operation unit 12 . The display unit 14 is a display that displays various information. The display unit 14 also functions as a so-called touch panel (that is, an operation unit that receives user operations). Camera 18 is a device for photographing an object. In this embodiment, the camera 18 is used to capture the QR code (registered trademark) displayed on the printer 100 .

Wi-Fi I/F 16 is similar to Wi-Fi I/F 116 of printer 100 . That is, the Wi-Fi I/F 16 supports the DPP method. BTI/F 17 is similar to BTI/F 117 of printer 100 . That is, the BTI/F 17 is an I/F defined in version 5 or later of the BT standard.

The control unit 30 has a CPU 32 and a memory 34 . CPU 32 executes various processes according to programs 36 and 38 stored in memory 34 . The memory 34 is composed of a volatile memory, a nonvolatile memory, or the like.

An OS (abbreviation of Operating System) program 36 is a program for realizing basic operations of the terminal 10 . The application 38 is a program for establishing a Wi-Fi connection between the terminal 10 and the AP 41 and establishing a Wi-Fi connection between the printer (eg 100) and the AP 41. FIG. Below, the OS program and the application are referred to as "OS" and "application", respectively. The application 38 can establish a Wi-Fi connection between the terminal 10 and the AP 41 or between the printer (eg, 100) and the AP 41 by causing the OS 36 to execute processing according to the DPP method. The application 38 is installed in the terminal 10 from, for example, a server (not shown) on the Internet provided by the vendor of the printers 100 and 200 or a server (not shown) on the Internet provided by the vendor of the OS.

A hardware configuration (not shown) of the terminal 20 is the same as that of the terminal 10 . That is, the terminal 20 includes a camera, a BTI/F defined in version 5 or later of the BT standard, and a Wi-Fi I/F that supports the DPP scheme. Also, an application 38 is installed in the terminal 20 .

(Configuration of AP41)
The AP 41 is a normal access point called a wireless access point or wireless LAN router. AP 41 supports the DPP method and the normal Wi-Fi method. The AP 41 relays communication between a pair of devices belonging to the Wi-Fi network in which the AP 41 operates as a master station.

The AP 41 stores SSID (abbreviation of Service Set Identifier) "AS1" and PW "P1". The SSID “AS1” is information identifying the Wi-Fi network formed by the AP41. PW “P1” is authentication information for belonging to a Wi-Fi network.

The hardware configuration (not shown) of AP42 is the same as that of AP41. AP42 stores SSID "AS2" and PW "P2".

(Processing for establishing Wi-Fi connection between printer 100 and AP 41: FIG. 2)
Specific processing executed by each device 10, 20, 100, 200 will be described with reference to FIGS. 2 to 6. FIG. In the following, for ease of understanding, the operations executed by the CPU (for example, the CPU 32, etc.) of each device will be described mainly for each device (for example, the terminal 10) instead of mainly for the CPU. Among the operations performed by the terminal 10, the operations performed by the OS 36 and the operations performed by the application 38 will be described mainly with respect to the "OS 36" and the "application 38", respectively. In FIGS. 2 to 6, communication according to the BT standard and communication according to the Wi-Fi standard between the devices 10 and the like are indicated by solid lines and dashed lines, respectively.

First, referring to FIG. 2, a process for establishing a Wi-Fi connection between the printer 100 and the AP 41 using the terminal 10 will be described. In the initial state of FIG. 2, the terminal 10 has established Wi-Fi with the AP41, and the terminal 20 has established Wi-Fi with the AP42.

At T2, the power of the printer 100 is turned on by the user. In this case, the printer 100 (that is, the CPU 132) instructs the BTI/F 117 to transmit the AD signal. As a result, the BTI/F 117 repeatedly transmits the AD signal at T4. Thus, the printer 100 starts transmitting the AD signal without receiving an instruction to transmit the AD signal from the user. Therefore, user convenience is improved.

The AD signal includes the model name "M1", the serial number "SN1" and the SSID "SI1". The SSID "SI1" is information generated by the printer 100 at time T2, and includes, for example, the MAC address of the Wi-Fi I/F 116 of the printer 100 and the time at time T2. Since the SSID “SI1” includes the MAC address, it is information unique to the printer 100 , in other words, information for identifying the printer 100 . In a modified example, the SSID "SI1" may include another specific character string that can uniquely identify the printer 100 instead of the MAC address. Also, the SSID “SI1” may not be generated by the printer 100 at time T2, and may be information pre-stored in the memory 134 .

Next, T6 is the timing when a predetermined time (for example, 1 hour) has passed since transmission of the AD signal was started at T4. In this case, the printer 100 generates an SSID “SI1a” different from the SSID “SI1” and instructs the BTI/F 117 to transmit an AD signal including the SSID “SI1a”. As a result, the BTI/F 117 starts transmitting an AD signal including SSID "SI1a" instead of SSID "SI1" at T8. In this way, the security of the printer 100 is improved because the printer 100 does not use the same identification information for a long period of time.

At T12, the power of the printer 200 is turned on by the user. In this case, the printer 200 instructs the BTI/F (not shown) of the printer 200 to transmit the AD signal. As a result, the BTI/F starts transmitting an AD signal including the model name "M2", the serial number "SN2", and the SSID "SI2" at T14.

At T20, the user of the terminal 10 performs an operation to activate the application 38 of the terminal 10, and at T22, the user performs a Wi-Fi connection operation on the screen displayed by the application 38. FIG. The Wi-Fi connection operation is an operation for further connecting a printer (eg 100) to the AP 41 with which the terminal 10 has established a Wi-Fi connection. In this case, the application 38 supplies the OS 36 with a reception instruction for instructing reception of the AD signal.

Similarly, at T30, the user of the terminal 20 performs an operation to activate the application of the terminal 20, and at T32, the user performs a Wi-Fi connection operation. In this case, the application of the terminal 20 supplies the OS of the terminal 20 with a reception instruction for instructing reception of the AD signal.

When the OS 36 acquires the reception instruction from the application 38, the BTI/F 17 is activated. Accordingly, the application 38 receives the AD signal from the printer 100 via the BTI/F 17 at T40, and receives the AD signal from the printer 200 via the BTI/F 17 at T42.

Similarly, the application of the terminal 20 receives the AD signal from the printer 100 at T44, and receives the AD signal from the printer 200 at T46.

(Continuation processing of Fig. 2: Fig. 3)
When the application 38 receives AD signals from the printers 100 and 200 (T40 and T42 in FIG. 2), it causes the display unit 14 to display the connection selection screen SD1 at T50 in FIG. The connection selection screen SD1 includes the model name "M1" and serial number "SN1" included in the AD signal received from the printer 100, and the model name "M2" and the serial number "SN1" of the printer 200 included in the AD signal received from the printer 200. and a serial number "SN2". This allows the user of the terminal 10 to recognize that there are multiple printers 100 and 200 around the terminal 10 . Moreover, since not only the model names "M1" and "M2" but also the serial numbers "SN1" and "SN2" are displayed, even if the printers 100 and 200 have the same model name, the user can connect The target printer can be appropriately selected.

At T50, before displaying the connection selection screen SD1 on the display unit 14, the application 38 checks the received radio field strength of the AD signal received from the printer 100 and the received radio field strength of the AD signal received from the printer 200. compare. As described above, in this embodiment, the distance between terminal 10 and printer 100 is shorter than the distance between terminal 10 and printer 200 . Therefore, the received radio wave intensity of the former is higher than the received radio wave intensity of the latter. In this case, the application 38 displays the model name “M1” and the serial number “SN1” included in the AD signal with high received radio wave strength in a selectable manner, and displays the model name “M1” and the serial number “SN1” included in the AD signal with low received radio wave strength. The name "M2" and the serial number "SN2" are displayed in a non-selectable manner. Non-selectable aspects are so-called greyed out. In this way, the application 38 preferentially displays information about the printer 100, which is the source of the AD signal with a high received radio wave intensity, over information about the printer 200, which is the source of the AD signal with a low received radio wave intensity. to display. Therefore, the user of the terminal 10 can appropriately select the printer 100 located closest to the terminal 10 as the printer to be connected.

At T60, the user selects the model name "M1" and the serial number "SN1" in the connection selection screen SD1. In this case, the application 38 identifies the SSID “SI1a” included in the AD signal received from the printer 100 and instructs the OS 36 to send a Probe request including the identified SSID “SI1a”. As a result, the OS 36 broadcasts a Probe request including the SSID “SI1a” via the Wi-Fi I/F 16 at T62 and T70.

When the printer 200 receives the Probe request from the terminal 10 via the Wi-Fi I/F of the printer 200 in T62, it authenticates the SSID "SI1a" included in the Probe request in T64. Specifically, the printer 200 determines whether the SSID “SI1a” matches its own SSID “SI2”. In this case, the printer 200 determines that the two SSIDs do not match (i.e., determines authentication failure), does not transition from the enabled state to the disabled state (i.e., maintains the disabled state), and displays the QR code. do not. Possible and impossible states are described later.

Upon receiving the Probe request from the terminal 10 via the Wi-Fi I/F 116 at T70, the printer 100 authenticates the SSID "SI1a" included in the Probe request at T72. In this case, the printer 100 determines that the SSID “SI1a” matches its own SSID “SI1a” (that is, determines that the authentication is successful), and at T74, the printer 100 shifts from the disabled state to the enabled state.

The disabled state is a state in which the Wi-Fi I/F receives a DPP Authentication (hereinafter referred to as "Auth") Request but does not transmit a DPP Authentication Response. That is, the impossible state is a state in which Auth Response, which is a response to Auth Request, is not transmitted. Request and Response are hereinafter referred to as "Req" and "Res", respectively. The enabled state is a state in which the Wi-Fi I/F sends Auth Res in response to receiving Auth Req. That is, the printer 100 enters a state in which Auth according to the DPP method can be executed by shifting from the disabled state to the enabled state. In this manner, the printer 100 transitions to the enabled state without receiving instructions from the user when the authentication succeeds in T72. Therefore, user convenience is improved.

Next, at T76, the printer 100 causes the display unit 114 to display the QR code Q1. The QR code Q1 is a code image obtained by encoding the public key PPK1 of the printer 100, the MAC address of the Wi-Fi I/F 116, etc., which are stored in the memory 134 in advance. The public key PPK1 is information used for sending an Auth Req. The QR code Q1 may be generated by the printer 100 when the process of T76 is executed, or may be pre-stored in the memory 134 from the shipping stage of the printer 100 .

At T80, the OS 36 of the terminal 10 activates the camera 18 in response to receiving the activation operation of the camera 18 from the user. Next, at T82, the OS 36 uses the camera 18 to photograph the QR code Q1 (see T76) displayed on the printer 100. FIG. In this case, the application 38 decodes the captured QR code Q1 at T84 to acquire information such as the public key PPK1 and the MAC address.

At T90, the application 38 causes the display unit 14 to display the confirmation screen CD1. The confirmation screen CD1 is a screen for asking the user whether or not to execute connection processing for establishing a Wi-Fi connection between the printer 100 and the AP41. The confirmation screen CD1 includes a YES button indicating execution of connection processing and a NO button indicating not executing connection processing. At T92, the application 38 receives selection of the YES button from the user. Note that, in a modified example, the application 38 may execute subsequent processing without displaying the confirmation screen CD.

(Continuation processing of Fig. 3: Fig. 4)
The application 38 supplies a connection instruction including the public key PPK1 and the MAC address to the OS 36 in response to the user selecting the YES button in the confirmation screen CD1 at T92 in FIG. In this case, the OS 36 first generates an Auth Req using the public key PPK1 (see T84 in FIG. 3) included in the connection instruction. Then, at T100, the OS 36 transmits an Auth Req to the printer 100 via the Wi-Fi I/F 16 with the MAC address included in the connection instruction as the transmission destination. Auth Req is a signal requesting the printer 100 to perform authentication.

When the printer 100 receives the Auth Req from the terminal 10 via the Wi-Fi I/F 116 at T100, at T102 the public key PPK1 of the printer 100 is used to identify the sender of the Auth Req (that is, the terminal 10). Authenticate. When the authentication succeeds in T102, the printer 100 transmits Auth Res indicating success of the authentication to the terminal 10 via the Wi-Fi I/F 116 in T104.

The OS 36 of the terminal 10 receives Auth Res from the printer 100 at T104. This completes DPP-based Auth.

Next, at T110, the printer 100 transmits a DPP configuration (hereinafter referred to as “config”) Req to the terminal 10 via the Wi-Fi I/F 1116. FIG. The Req is a signal requesting the terminal 10 to transmit a printer config object (hereinafter simply referred to as "CO"). The Object is connection information necessary for the printer 100 to establish a Wi-Fi connection with the AP 41, and includes a Signed-Connector for the printer and the like.

When the OS 36 of the terminal 10 receives the Config Req from the printer 100 at T110, it generates the printer CO1. CO1 for printer includes SSID "AS1" and PW "P1" of AP41. Next, at T112, the OS 36 sends Config Res including the printer CO1 to the printer 100 via the Wi-Fi I/F 16. FIG.

When the printer 100 receives the Config Res from the terminal 10 via the Wi-Fi I/F 116 at T112, the printer CO1 included in the Config Res is stored in the memory 134 at T114. This completes the DPP Config.

Next, at T120, the printer 100 establishes a Wi-Fi connection with the AP41 via the Wi-Fi I/F 116 by executing DPP Network Access with the AP41. In Network Access, various communications are executed between the printer 100 and the AP 41, and in the process of these communications, the SSID "AS1" and PW "P1" included in the printer CO1 stored in T114 are used. be. As a result, DPP-based Network Access ends.

When the printer 100 establishes a Wi-Fi connection with the AP 41 at T120, the IP address “IA1” of the printer 100 is assigned by the AP 41 . In this case, the printer 100 instructs the BTI/F 117 to send an AD signal containing the IP address "IA1". In this case, the BTI/F 117 repeatedly transmits the AD signal including the IP address "IA1" at T122. The printer 100 stops transmitting the AD signal after a predetermined time (for example, 30 minutes) has passed.

When the application 38 receives the AD signal from the printer 100 via the BTI/F 17 at T122, it uses the IP address "IA1" included in the AD signal as the destination via the Wi-Fi I/F 16 at T130. Send a confirmation signal. The confirmation signal is, for example, a PING signal. As a result, the application 38 can transmit the confirmation signal to the printer 100 via the AP 41 at T130 and T132.

Upon receiving the confirmation signal from the terminal 10 via the Wi-Fi I/F 116 at T130 and T132, the printer 100 transmits a response signal to the terminal 10 via the Wi-Fi I/F 116 at T140 and T142.

When the application 38 receives the response signal from the printer 100 at T142, the confirmation result is displayed on the display unit 14 at T144. The confirmation result includes a message indicating that communication with printer 100 can be executed via AP 41 . Thereby, the user of the terminal 10 can know that the Wi-Fi connection has been established between the printer 100 and the AP 41 and that communication with the printer 100 can be executed.

(Continuation processing of FIG. 4: FIG. 5)
Next, with reference to FIG. 5, processing for establishing a Wi-Fi connection between the printer 200 and the AP 42 using the terminal 20 will be described.

When the application of the terminal 20 receives the AD signal from each of the printers 100 and 200 (T40 and T42 in FIG. 2), the connection selection screen SD2 is displayed on the display of the terminal 20 at T150. The processing at T150 is the same as the processing at T50 in FIG. However, at T150, the application of the terminal 20 displays the model name "M2" and the serial number "SN2" included in the AD signal with high received radio field strength in a selectable manner, and displays the AD signal with low received radio field strength. The model name "M1" and the serial number "SN1" included in the are displayed in a non-selectable manner.

At T160, the user selects the model name "M2" and the serial number "SN2" in the connection selection screen SD2. In this case, the application of the terminal 20 identifies the SSID “SI2” included in the AD signal received from the printer 200 and instructs the OS of the terminal 20 to send a Probe request including the identified SSID “SI2”. . As a result, the OS of the terminal 20 broadcasts a Probe request including the SSID “SI2” via the Wi-Fi I/F of the terminal 20 at T162 and T170.

When the printer 200 receives the Probe request from the terminal 20 via the Wi-Fi I/F of the printer 200 at T162, the printer 200 executes the processes from T164 to T168 to display the QR code Q2 on the display section of the printer 200. FIG. T164 to T168 are the same as T72 to T76 in FIG. 3 except that the probe request includes SSID "SI2" instead of SSID "SI1a" and that QR code Q2 is displayed instead of QR code Q1. is similar to The QR code Q2 is a code image obtained by encoding the public key PPK2 of the printer 200, which is pre-stored in the memory of the printer 200, the MAC address of the Wi-Fi I/F of the printer 200, and the like.

At T170, the printer 100 receives the Probe request from the terminal 20 via the Wi-Fi I 116. At T172, the printer 100 authenticates the SSID “SI2” included in the Probe request, and the SSID “SI2” becomes its own SSID “SI1a”. ” to determine whether or not they match. In this case, the printer 100 determines that the two SSIDs do not match, does not transition from the enabled state to the disabled state, and does not display the QR code Q1.

In T180, the OS of the terminal 20 activates the camera of the terminal 20 in response to receiving an activation operation of the camera of the terminal 20 from the user. T182 to T192 executed thereafter are the same as the processing of T80 to T92 in FIG. be.

(Continuation processing of FIG. 5: FIG. 6)
After that, the processes of T200 to T214 are executed between the terminal 20 and the printer 200. FIG. Except that the public key PPK2 of the printer 200 is used instead of the public key PPK1 of the printer 100, and that Config Res includes CO2 for the printer instead of CO1 for the printer, T200 to T214 are the same as those shown in FIG. is the same as T100 to T114. The printer CO2 includes the AP 42 SSID "AS2" and PW "P2".

Next, in T220, the printer 200 executes DPP-based Network Access with the AP42. A Wi-Fi connection is thereby established between the printer 200 and the AP 42 .

After establishing a Wi-Fi connection with the AP 42 at T220, the printer 200 repeatedly transmits an AD signal including the IP address "IA2" assigned by the AP 42 at T222. T230 to T244 executed thereafter are the same as T130 to T144 in FIG. 4, except that AP42 is used.

(Effect of this embodiment)
The printers 100 and 200, which are located in different areas A1 and A2, receive Probe requests from the terminals 10 and 20 (T62 and T70 in FIG. 3, T162 and T170 in FIG. 5). For example, a comparative example can be considered in which the printer 100 located in the first area A1 displays the QR code Q1 in response to receiving the probe request of T170 from the terminal 20 located in the second area A2. In this comparative example, the printer 100 will display the QR code Q1, for example, even while the printer 100 is being operated by the user (that is, the first administrator of the first area A1). . That is, in this case, the QR code Q1 is sent to the printer 100 located in the first area A1, triggered by the operation by the second administrator of the second area A2 (that is, an administrator different from the first administrator). Is displayed. Therefore, the first administrator does not know how to respond to the suddenly displayed QR code Q1 and may be confused. Thus, in this comparative example, the convenience of the printer 100 for the user is impaired.

The printer 100 of this embodiment transmits an AD signal including the SSID "SI1a" for identifying the printer 100 (T40, T44 in FIG. 2). The application 38 then transmits a Probe request including the SSID "SI1a" of the printer 100 to the printer 100 (T70 in FIG. 3). For this reason, the printer 100 displays the QR code Q1 when the probe request includes the SSID "SI1a", that is, when the probe request is addressed to itself (T76). On the other hand, the printer 100 does not display the QR code Q1 when the probe request includes the SSID "SI2" (T170 in FIG. 5), that is, when the probe request is not addressed to itself. Therefore, for example, it is possible to prevent the QR code Q1 from being displayed in response to a probe request received from another area A2 while the printer 100 is being operated. That is, the QR code Q1 is not displayed on the printer 100 located in the first area A1 triggered by the operation by the second administrator of the second area A2. As a result, convenience for the user of the printer 100 can be improved.

Also, the printer 200 and the application of the terminal 20 operate in the same manner as the printer 100 and the application 38 . Therefore, it is possible to prevent the QR code Q2 from being displayed in response to a probe request received from another area A1 while the printer 200 is being operated. As a result, convenience for the user of the printer 200 can be improved.

(correspondence relationship)
The correspondence regarding "communication device" is as follows. The printer 100 is an example of a "communication device." The BTI/F 117 and Wi-Fi I/F 116 are examples of the "first wireless interface" and the "second wireless interface", respectively. The display unit 114 is an example of the "output unit". SSIDs “SI1” and “SI1a” are examples of identification information. The terminal 10 and AP 41 are examples of the "first external device" and the "second external device", respectively. QR code Q1 is an example of a "specific image".

The processing of T4 and T8 in FIG. 2 is an example of processing executed by the "first advertising signal transmission unit". The processing of T70 in FIG. 3 and T170 in FIG. 5 is an example of processing executed by the “specific signal receiving unit”. The process of T76 in FIG. 3 is an example of the process executed by the "output control unit". The processing of T100 and the processing of T104 in FIG. 4 are examples of processing executed by the "authentication request receiving unit" and the "authentication response transmitting unit", respectively. The processing of T112 and the processing of T120 in FIG. 4 are examples of processing executed by the "connection information receiving unit" and the "establishing unit", respectively. The process of T74 in FIG. 3 is an example of the process executed by the "state transition unit". The process of T122 in FIG. 4 is an example of the process executed by the "second advertising signal transmitter".

The correspondence regarding "terminal device" is as follows. The terminal 10 is an example of a "terminal device". The BTI/F 17 and Wi-Fi I/F 16 are examples of the "first wireless interface" and the "second wireless interface", respectively. The printer 100 and the printer 200 are examples of the "first communication device" and the "second communication device", respectively. AP 41 is an example of "another device". The connection instruction supplied from the application 38 to the OS 36 after T92 in FIG. 3 is an example of the "predetermined instruction". The connection selection screen SD1 is an example of a "selection screen".

The processing of T40 in FIG. 2, the processing of T122 in FIG. 4, and the processing of T42 in FIG. It is an example of a process executed by a "receiving unit". The process of T70 in FIG. 3 is an example of the process executed by the "specific signal transmitter". The process of T84 in FIG. 3 is an example of the process executed by the "public key obtaining unit". The process of T130 in FIG. 4 is an example of the process executed by the 'confirmation signal transmission unit'. The processing of T50 in FIG. 3 is an example of processing executed by the “display control unit”.

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. Modifications of the above embodiment are listed below.

(Modification 1) The printer 100 may cause the print execution unit 118 to print the QR code Q1 instead of displaying the QR code Q1 on the display unit 114 at T76 in FIG. In this modified example, the print executing unit 118 is an example of the “output unit”.

(Modification 2) The printer 100 may establish a Wi-Fi connection with the terminal 10 instead of establishing a Wi-Fi connection with the AP 41 at T120 in FIG. In this modified example, the terminal 10 is an example of the "second external device" and the "other device".

(Modification 3) At T70 in FIG. 3, instead of receiving the Probe request from the terminal 10 via the Wi-Fi I/F 116, the printer 100 sends An AD signal containing the SSID may be received. In this case, the printer 100 displays the QR code Q1 when receiving an AD signal including the SSID "SI1a" from the terminal 10, and displays the QR code Q1 when receiving an AD signal including the SSID "SI2" from the terminal 10. Do not display Q1. Generally speaking, the "specific signal receiver" may receive the specific signal from the first external device via the first wireless interface. Since the printer 100 of this modification needs to receive an AD signal from the terminal 10, it is required to function as a BT system central. On the other hand, the printer 100 of the embodiment described above does not need to receive the AD signal from the terminal 10, so it suffices if it functions only as a BT system peripheral. Therefore, in the embodiment described above, the configuration of the printer 100 can be simplified.

(Modification 4) The printer 100 does not need to transition from the disabled state to the enabled state in T72 of FIG. 3 when the SSID “SI1a” is successfully authenticated. For example, the printer 100 may transition from the disabled state to the enabled state when receiving an instruction from the user to transfer from the disabled state to the enabled state. In this modified example, the "state transition section" can be omitted.

(Modification 5) The printer 100 does not have to start transmitting the AD signal when the power is turned on at T2 in FIG. For example, the printer 100 may start transmitting the AD signal when receiving an instruction to transmit the AD signal from the user. Generally speaking, the "first advertising signal transmission unit" does not have to start transmitting the first advertising signal when the power of the communication device is turned on.

(Modification 6) At T6 in FIG. 2, the printer 100 may continue to transmit the AD signal including the SSID "SI1" without changing the SSID even after a predetermined period of time has elapsed. Generally speaking, the ``first advertising signal transmission unit'' transmits an advertising signal including identification information different from the identification information when a predetermined time has elapsed since the transmission of the first advertising signal was started. does not have to start.

(Modification 7) AD signals transmitted at T4 and T8 in FIG. 2 include SSID "SI1" and the like, but may not include model name "M1" and serial number "SN1". The AD signal may, for example, contain only the model name "M1", may contain only the serial number "SN1", or may contain neither the model name "M1" nor the serial number "SN1".

(Modification 8) The processes of T122 to T144 in FIG. 4 may not be executed. In this modified example, the "second advertising signal transmission section", the "second advertising signal reception section", and the "confirmation signal transmission section" can be omitted.

(Modification 9) At T50 in FIG. 3, the application 38 sets the model name "M1" and the serial number "SN1", the model name "M2" and the serial number "SN2" without comparing the received radio wave strength of the AD signal. , may be displayed in the same manner. In this modified example, the “display control unit” can be omitted.

(Modification 10) At T50 in FIG. 3, the application 38 may display only the model name "M1" and the serial number "SN1" included in the AD signal having the high received radio wave intensity on the connection selection screen SD1. This modification is also an example of "preferentially displayed". “Preferentially displayed” may be implemented in other variations (1) to (3) below. (1) Information contained in AD signals with high received radio wave intensity is located above information contained in AD signals with low received radio wave intensity. (2) Information contained in AD signals with high received radio wave intensity is displayed in a larger size than information contained in AD signals with low received radio wave intensity. (3) Information contained in an AD signal with a high received radio wave intensity is displayed in a different color than information contained in an AD signal with a low received radio wave intensity.

In addition, the technical elements described in this specification or in the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the techniques exemplified in this specification or drawings achieve multiple purposes at the same time, and achieving one of them has technical utility in itself.

2: communication system, 10, 20: mobile terminal, 12, 112: operation unit, 14, 114: display unit, 16, 116: Wi-Fi I / F, 17, 117: BTI / F, 18: camera, 30, 130: control unit, 32, 132: CPU, 34, 134: memory, 36: OS, 38: application, 41, 42: AP, 100, 200: printer, 118: print execution unit, 136: program, PPK1, PPK2 : public key, Q1, Q2: QR code, SD1, SD2: connection selection screen

Claims (15)

A communication device,
a first wireless interface for performing wireless communication according to the Bluetooth standard;
a second wireless interface for performing wireless communication according to the Wi-Fi standard;
an output unit;
a first advertising signal transmission unit that repeatedly transmits a first advertising signal including identification information for identifying the communication device via the first wireless interface;
a specific signal receiving unit that receives a specific signal from a first external device via the first wireless interface or the second wireless interface;
an output control unit that causes the output unit to output a specific image obtained using a public key of the communication device when the specific signal includes the identification information, wherein the specific signal does not include the identification information; the output control unit that does not output the specific image;
an authentication request receiving unit that receives an authentication request using the public key from the first external device via the second wireless interface after the specific image is output;
an authentication response transmission unit configured to transmit an authentication response to the first external device via the second wireless interface when the authentication request is received from the first external device;
a connection information receiving unit configured to receive connection information from the first external device via the second wireless interface when the authentication response is transmitted to the first external device;
wireless connection between the communication device and a second external device via the second wireless interface using the connection information when the connection information is received from the first external device; an establishing unit that establishes
A communication device comprising: 2. The communication device according to claim 1, wherein said specific signal receiving section receives said specific signal, which is a probe request, from said first external device via said second wireless interface. 3. The communication device according to claim 2, wherein the identification information includes an SSID (abbreviation for Service Set Identifier). The communication device further
a state transition unit that shifts the state of the communication device from a disabled state to a enabled state when the specific signal includes the identification information, wherein the disabled state is a state in which the authentication response is not transmitted; 2. The possible state includes the state transition unit, wherein the possible state is a state of transmitting the authentication response to the first external device in response to receiving the authentication request from the first external device. Or the communication device according to 2. The communication device according to any one of claims 1 to 4, wherein the first advertising signal transmission unit starts transmission of the first advertising signal when power of the communication device is turned on. wherein the first advertising signal transmission unit starts transmission of an advertising signal including identification information different from the identification information when a predetermined time has elapsed since transmission of the first advertising signal was started; Item 6. The communication device according to any one of Items 1 to 5. 7. The communication device according to any one of claims 1 to 6, wherein said first advertising signal further comprises at least one of a model name of said communication device and a serial number of said communication device. The communication device further
2. The apparatus according to claim 1, further comprising a second advertising signal transmitting unit that repeatedly transmits a second advertising signal including an IP address of the communication device via the first wireless interface when the wireless connection is established. 8. The communication device according to any one of 1 to 7. A computer program for a communication device, comprising:
The communication device
a first wireless interface for performing wireless communication according to the Bluetooth standard;
a second wireless interface for performing wireless communication according to the Wi-Fi standard;
an output unit;
a computer;
with
The computer program causes the computer to:
a first advertising signal transmission unit that repeatedly transmits a first advertising signal including identification information for identifying the communication device via the first wireless interface;
a specific signal receiving unit that receives a specific signal from a first external device via the first wireless interface or the second wireless interface;
an output control unit that causes the output unit to output a specific image obtained using a public key of the communication device when the specific signal includes the identification information, wherein the specific signal does not include the identification information; the output control unit that does not output the specific image;
an authentication request receiving unit that receives an authentication request using the public key from the first external device via the second wireless interface after the specific image is output;
an authentication response transmission unit configured to transmit an authentication response to the first external device via the second wireless interface when the authentication request is received from the first external device;
a connection information receiving unit configured to receive connection information from the first external device via the second wireless interface when the authentication response is transmitted to the first external device;
wireless connection between the communication device and a second external device via the second wireless interface using the connection information when the connection information is received from the first external device; an establishing unit that establishes
A computer program that acts as An application program for a terminal device,
The terminal device
a first wireless interface for performing wireless communication according to the Bluetooth standard;
a second wireless interface for performing wireless communication according to the Wi-Fi standard;
camera and
a memory for storing an OS (abbreviation of Operating System) program;
a computer;
The application program causes the computer to:
a first advertising signal receiver that receives a first advertising signal including first identification information that identifies the first communication device from the first communication device via the first wireless interface;
When the first advertising signal is received from the first communication device, the specific signal including the first identification information is transmitted to the first communication device via the first wireless interface or the second wireless interface. a specific signal transmission unit that transmits to one communication device;
A specific image obtained using the public key of the first communication device is output by the first communication device in response to the transmission of the specific signal to the first communication device, and a public key acquisition unit that acquires the public key when an image is captured by the camera;
a supply unit that supplies a predetermined instruction including the public key to the OS program;
The OS program is
transmitting an authentication request using the public key to the first communication device via the second wireless interface when the predetermined instruction is obtained from the application program;
receiving an authentication response from the first communication device via the second wireless interface when the authentication request is sent to the first communication device;
transmitting connection information to the first communication device via the second wireless interface when the authentication response is received from the first communication device;
The application program, wherein the connection information is information for establishing a wireless connection according to the Wi-Fi standard between the first communication device and another device. 11. The application program according to claim 10, wherein said specific signal transmission unit transmits said specific signal, which is a probe request, to said first communication device via said second wireless interface. 12. The application program according to claim 11, wherein said first identification information includes an SSID (abbreviation for Service Set Identifier). 13. The first advertising signal of any one of claims 10-12, further comprising at least one of a model name of the first communication device and a serial number of the first communication device. application program. The application program further causes the computer to:
receiving a second advertising signal including an IP address of the first communication device from the first communication device via the first wireless interface after the predetermined instruction is supplied to the OS program; a second advertising signal receiver;
an acknowledgment signal transmission unit that transmits an acknowledgment signal including the IP address as a destination address via the second wireless interface when the second advertising signal is received from the first communication device;
14. The application program according to any one of claims 10 to 13, which functions as a The terminal device further comprises a display unit,
The application program further causes the computer to:
receiving a third advertising signal including second identification information for identifying the second communication device from a second communication device different from the first communication device via the first wireless interface; a third advertising signal receiver;
When the first advertising signal is received from the first communication device and the third advertising signal is received from the second communication device, the first communication device and the second A display control unit that causes the display unit to display a selection screen for selecting one of the communication devices, wherein the selection screen includes the first advertising signal and the third advertising signal, The display control, wherein information corresponding to a communication device that has transmitted an advertising signal having a high received radio wave intensity is displayed preferentially over information corresponding to a communication device that has transmitted an advertising signal having a low received radio wave intensity. Department and
function as
The specific signal transmission unit transmits the first identification information included in the first advertising signal received from the first communication device when the first communication device is selected on the selection screen. 15. A computer program according to any one of claims 10 to 14, identifying and transmitting said identification signal including said identified first identification information to said first communication device.

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