JP6264436B2 - Communication device - Google Patents

Description

  The technology disclosed in this specification relates to a communication device that performs communication of target data to be communicated with an external device in the NFC method, which is a communication method according to the NFC (abbreviation of Near Field Communication) standard.

  Patent Document 1 discloses a technique for two communication devices to perform wireless communication. In this technique, the two communication apparatuses execute wireless communication of communication information by the NFC method. The communication information includes information for executing wireless communication according to a communication method (for example, IEEE 802.11a) different from the NFC method (that is, information indicating the communication method and information indicating the encryption method). Thus, the two communication devices can execute wireless communication according to a communication method different from the NFC method.

JP 2007-166538 A

  The present specification provides a technique for a communication device to appropriately communicate target data to be communicated with an external device using the NFC method.

One technique disclosed in this specification is a communication device that performs communication of target data to be communicated with an external device in the NFC method that is a communication method in accordance with the NFC (Near Field Communication) standard,
An NFC interface for executing the NFC communication;
A processor;
And a memory storing a program,
The processor performs the following steps according to the program stored in the memory:
A first establishment command for establishing a first communication link between the communication device and the external device is communicated with the external device via the NFC interface, and the first communication link is established. A first establishing step to establish;
Receiving the first target data from the external device via the NFC interface using the first communication link;
A first disconnecting step for disconnecting the first communication link after the reception step is executed, and an operation control for temporarily stopping the operation of the NFC interface after the first communication link is disconnected. A first NFC control step comprising:
After the first NFC control step is executed, a second establishment command for establishing a second communication link between the communication device and the external device is sent via the NFC interface to the external device. A second establishing step of communicating with a device to establish the second communication link;
Transmitting the second target data to the external device via the NFC interface using the second communication link;
A second NFC control step including a second disconnection step of disconnecting the second communication link after the transmission step is performed, and not including the operation control step;
Is a communication device.
In addition, one technique disclosed in this specification is a communication device that performs communication of target data to be communicated with an external device in the NFC method, which is a communication method in accordance with the NFC (Near Field Communication) standard. ,
An NFC interface for executing the NFC communication;
A processor;
And a memory storing a program,
The processor performs the following steps according to the program stored in the memory:
A step of storing specific information in the memory, wherein the specific information is transmitted as second target data to the external device in response to receiving the first target data from the external device; The storage step, which is information for determining whether or not
A first establishing step of establishing a first communication link with the external device via the NFC interface;
Receiving the first target data from the external device via the NFC interface using the first communication link;
Judging whether or not the second target data should be transmitted to the external device based on the specific information in response to receiving the first target data from the external device Steps,
A first disconnecting step of disconnecting the first communication link using a first type disconnection method when it is determined that the second target data is to be transmitted to the external device;
A second establishing step of establishing a second communication link with the external device via the NFC interface after the first communication link is disconnected using the first type disconnection method;
Transmitting the second target data to the external device via the NFC interface using the second communication link;
When it is determined that the second target data should not be transmitted to the external device, the first communication link is made using a second type of disconnection method different from the first type of disconnection method. A second cutting step of cutting
Is a communication device.
One technique disclosed in the present specification is a communication device that performs communication of target data to be communicated with an external device in the NFC method, which is a communication method according to the NFC (Near Field Communication) standard. The communication device includes an NFC interface for executing the NFC communication, a processor, and a memory storing a program.
The processor performs the following steps according to the program stored in the memory:
A first establishment command for establishing a first communication link between the communication device and the external device is communicated with the external device via the NFC interface, and the first communication link is established. A first establishing step to establish;
Receiving the first target data from the external device via the NFC interface using the first communication link, wherein the first target data includes a specific command, Relation information related to a communication program for an external device to execute the NFC communication, and the reception step,
Generating the second target data by processing the specific command included in the first target data;
A selection step of selecting one type of disconnection method according to the relationship information included in the first target data from a plurality of types of disconnection methods for disconnecting the first communication link;
A disconnecting step of disconnecting the first communication link using the selected one disconnection method;
After the first communication link is disconnected, a second establishment command for establishing a second communication link between the communication device and the external device is sent via the NFC interface to the external device. Communicating with a second establishing step of establishing the second communication link;
Transmitting the second target data to the external device via the NFC interface using the second communication link;
Execute.

  According to the above configuration, the communication device receives the first target data from the external device using the first communication link, and then uses the same first communication link to transmit the second target data. Instead of communicating, the first communication link is temporarily disconnected and a second communication link is newly established. In particular, the communication device selects one type of cutting method according to the relationship information included in the first target data from a plurality of types of cutting methods, and uses the selected one type of cutting method, Disconnect the first communication link. For this purpose, the communication device can appropriately disconnect the first communication link and appropriately establish the second communication link. Therefore, the communication device can appropriately transmit the second target data to the external device using the second communication link.

  (1) When the first communication command is established by transmitting the first establishment command to the external device, (1-1) the first target data is a type of the first communication program. The first type information indicating the first version information indicating the first version of the first communication program, the selection step includes the first type information. (1-2) The first target data is the first type information and the second version of the first communication program, and the first version is A second type of cutting method different from the first type of cutting method when the second relation information including second version information indicating the different second version is included. You may choose. According to this configuration, when the communication device transmits the first establishment command to the external device to establish the first communication link, the communication device selects an appropriate disconnection method according to the first or second relationship information. Can do.

  The first type of cutting method may include a method of temporarily stopping the operation of the NFC interface. The second type of disconnection method includes a method of transmitting a disconnect command to the external device via the NFC interface and receiving a response command for the disconnect command from the external device via the NFC interface. You may go out. According to this configuration, when the communication device selects the first type or the second type of disconnection method, the communication device can appropriately disconnect the first communication link and appropriately establish the second communication link.

  (1) When the first communication command is established by transmitting the first establishment command to the external device, (1-1) the first target data is a type of the first communication program. In the case of including the first relation information including the first type information indicating, the selection step selects the first type of cutting method, and (1-3) the first target data is the first type data. When the third relation information including the second type information indicating the type of the second communication program different from the first communication program is included, the selection step is different from the first type cutting method. Three cutting methods may be selected. According to this configuration, when the communication device transmits the first establishment command to the external device and establishes the first communication link, the communication device selects an appropriate disconnection method according to the first or third relationship information. Can do.

  The first type of cutting method may include a method of temporarily stopping the operation of the NFC interface. The third type disconnection method transmits a disconnect command to the external device via the NFC interface, receives a response command for the disconnect command from the external device via the NFC interface, and then A method of temporarily stopping the operation of the NFC interface may be included. According to this configuration, when selecting the first type or the third type of disconnection method, the communication device can appropriately disconnect the first communication link and appropriately establish the second communication link.

  (2) When receiving the first establishment command from the external device and establishing the first communication link, (2-1) the first target data is the type of the first communication program The first type information indicating the first version information indicating the first version of the first communication program, the selection step includes the first type information. (2-2) The first target data is the first type information and the second version of the first communication program, and the first version is A second type of cutting method different from the first type of cutting method, when the second relation information including second version information indicating the different second version is included. You may choose. According to this configuration, when the communication device receives the first establishment command from the external device and establishes the first communication link, the communication device selects an appropriate disconnection method according to the first or second relationship information. Can do.

  The first type of disconnection method may include a method of temporarily stopping the operation of the NFC interface over a first period. The fourth type of disconnection method may include a method of temporarily stopping the operation of the NFC interface over a second period different from the first period. According to this configuration, when the first type or the fourth type of disconnection method is selected, the communication device can appropriately disconnect the first communication link and appropriately establish the second communication link.

  The first establishment command is received from the external device to establish the first communication link, and the communication device is to operate in accordance with the P2P mode of the NFC standard. When one target data includes the first relation information, the selecting step selects the first type of cutting method, and the first target data includes the second relation information. In the selection step, the fourth type cutting method may be selected. In a specific case where the first establishment command is received by receiving the first establishment command from the external apparatus, and the communication apparatus is to operate in accordance with the card emulation mode of the NFC standard Whether the first target data includes the first relation information or the second relation information, the selection step may select a fifth cutting method. The fifth type of disconnection method includes a method of receiving a disconnect command from the external device via the NFC interface and transmitting a response command to the disconnect command to the external device via the NFC interface. You may go out. According to this configuration, when the communication device receives the first establishment command from the external device and establishes the first communication link, the communication device appropriately selects the relationship information and the mode in which the communication device should operate. A suitable cutting technique can be selected.

  In accordance with the program stored in the memory, the processor further performs an operation control step after the first communication link is disconnected using the fifth type disconnection method in the specific case. May be executed. When the first target data includes the first relationship information, the operation control step temporarily stops the operation of the NFC interface over the first period, and When the target data includes the second relation information, the operation of the NFC interface may be temporarily stopped over the second period. According to this configuration, after the first communication link is disconnected, the communication device has an NFC interface over a period according to the first or second relation information (that is, the first period or the second period). Stop the operation. For this reason, the communication device can appropriately operate the external device after communicating the first target data.

  The memory further stores communication continuation information indicating whether or not the second target data should be transmitted to the external device after the first target data is received from the external device. May be. In accordance with the program stored in the memory, the processor further uses the communication continuation information to determine whether the second target data should be transmitted to the external device. May be executed. In the selection step, when it is determined that the second target data should be transmitted to the external device, the relation information included in the first target data from the plurality of types of cutting methods. In the case where it is determined that the second target data should not be transmitted to the external device, the relationship information included in the first target data is included in the relation information. Regardless, a predetermined type of cutting method may be selected. According to this configuration, the communication device can select an appropriate disconnection method depending on whether or not the second target data should be transmitted to the external device.

  Note that a control method, a computer program, and a computer-readable recording medium storing the computer program for realizing the communication device are also novel and useful. A communication system including the communication device and an external device is also new and useful.

1 shows a configuration of a communication system. An example of the cutting | disconnection technique table is shown. An example of an operation control table is shown. 6 shows a flowchart of MFP listen processing. FIG. 5 is a flowchart continued from FIG. 4. FIG. 2 shows a flowchart of poll processing of an MFP. FIG. 7 is a flowchart continued from FIG. 6. FIG. The sequence chart of communication of case A is shown. The sequence chart of communication of case B is shown. The sequence chart of communication of case C is shown. The sequence chart of communication of case D is shown. A sequence chart of communication in case E is shown.

(Configuration of communication system 2)
As shown in FIG. 1, the communication system 2 includes a multi-function device (hereinafter referred to as “MFP (abbreviation of Multi-Function Peripheral)”) 10 and a portable terminal 50. The MFP 10 and the portable terminal 50 can each execute communication in the NFC standard communication method (that is, the NFC method). In this embodiment, the NFC standard is an international standard of ISO / IEC21481 or ISO / IEC18092. NFC communication is wireless communication using radio waves in the 13.56 MHz band. Further, the MFP 10 and the mobile terminal 50 can execute wired communication or wireless communication using a communication network different from the NFC communication link.

(Configuration of MFP 10)
The MFP 10 includes an operation unit 12, a display unit 14, a network interface (hereinafter referred to as “I / F”) 16, a print execution unit 18, a scan execution unit 20, an NFC I / O. F22 and the control part 30 are provided.

  The operation unit 12 includes a plurality of keys. The user can input various instructions to the MFP 10 by operating the operation unit 12. The display unit 14 is a display for displaying various information. The network I / F 16 may be an I / F for connecting to a wired network or an I / F for connecting to a wireless network. This wireless network is a network for performing wireless communication different from NFC communication. For example, IEEE (abbreviation of The Institute of Electrical and Electronics Engineers, Inc.) 802.11 standard, and The network conforms to a standard (for example, 802.11a, 11b, 11g, 11n, etc.) according to it. The print execution unit 18 is a printing mechanism such as an inkjet method or a laser method. The scan execution unit 20 is a scan mechanism such as a CCD or CIS.

  The NFC I / F 22 is an interface for executing NFC communication. The NFC I / F 22 is configured by a chip different from the network I / F 16. When the network I / F 16 is an I / F for connecting to a wireless network, the network I / F 16 and the NFC I / F 22 are different in the following points.

  That is, the communication speed of the wireless communication via the network I / F 16 is faster than the communication speed of the wireless communication via the NFC I / F 22. Furthermore, the frequency of the carrier wave in the wireless communication via the network I / F 16 is different from the frequency of the carrier wave in the wireless communication via the NFC I / F 22. Further, when the distance between the MFP 10 and the portable terminal 50 is approximately 10 cm or less, the MFP 10 can perform NFC communication with the portable terminal 50 via the NFC I / F 22. On the other hand, regardless of whether the distance between the MFP 10 and the portable terminal 50 is 10 cm or less or 10 cm or more, the MFP 10 can execute wireless communication with the portable terminal 50 via the network I / F 16. That is, the maximum distance that the MFP 10 can execute wireless communication with a communication destination device (for example, the portable terminal 50) via the network I / F 16 is the maximum distance that the MFP 10 can communicate with via the NFC I / F 22. And greater than the maximum distance that can perform wireless communication. Hereinafter, wireless communication via the network I / F 16 is referred to as “network wireless communication”.

  The control unit 30 includes a CPU 32 and a memory 34. The CPU 32 executes various processes according to programs 36 and 38 stored in the memory 34. The memory 34 includes a ROM, a RAM, a hard disk, and the like. The memory 34 stores the programs 36 and 38 executed by the CPU 32.

  The application program 36 is a program for the CPU 32 to execute processing of the application layer of the OSI reference model. The protocol stack 38 is a program for the CPU 32 to execute processing in a layer lower than the application layer of the OSI reference model. The protocol stack 38 includes a P2P (Peer to Peer) program, an R / W program, and a CE program. The P2P program is a program for executing processing according to the NFC standard P2P mode. The R / W program is a program for executing processing according to the NFC standard Reader / Writer mode. The CE program is a program for executing processing according to the NFC standard CE (abbreviation for Card Emulation) mode. These programs are programs for executing processing compliant with the NFC standard defined by the NFC Forum.

  The memory 34 further stores a transmission flag, a continuation flag, a command table 40, a cutting method table 42, and an operation control table 44.

  The transmission flag is a flag indicating whether the MFP 10 should transmit the target data to be communicated using NFC communication. That is, in a situation where the MFP 10 should transmit the target data, the transmission flag is set to “1”. In a situation where the MFP 10 should not transmit the target data, the transmission flag is set to “0”.

  The continuation flag is a flag indicating whether or not the communication (transmission or reception) of the target data is to be executed continuously. As will be described in detail later, communication of one or more target data is sequentially executed between the MFP 10 and the portable terminal 50. For example, after the first target data is transmitted from the portable terminal 50 to the MFP 10, the second target data is transmitted from the MFP 10 to the portable terminal 50, and a series of communications may end. In this example, at the stage where the communication of the first target data is executed, the continuation flag is set to “1” because the communication of the second target data should be continued. In addition, at the stage where the communication of the second target data is executed, the continuation flag is set because the communication of the target data should not be continued, that is, the communication of all the target data is finished. Set to “0”.

  The command table 40 indicates each command that can be included in each target data that the MFP 10 should transmit or receive using NFC communication. For example, as shown in pattern A, when the MFP 10 receives an A1 command (more precisely, one target data including the A1 command), the MFP 10 transmits an A2 command and then receives an A3 command. Then, an A4 command is transmitted. Since such a command table 40 is stored in the memory 24, for example, when the control unit 30 receives one target data including an A1 command, the control unit 30 transmits one target data including an A2 command. You can know that the situation should be. For example, when the control unit 30 transmits one target data including an A4 command, the A4 command is the last command, that is, a series of communication of a plurality of target data is completed. Can know.

  In the present embodiment, it is assumed that the MFP 10 does not transmit the first target data but receives the first target data in a series of communication of a plurality of target data. Accordingly, the command table 40 describes that the MFP 10 receives the first command (that is, A1, B1).

(Contents of cutting method table 42; FIG. 2)
As illustrated in FIG. 2, the cutting method table 42 is a table in which “situation”, “OS information”, “mode”, and “cutting method” are associated with each other. As will be described in detail later, the MFP 10 refers to the disconnection method table 42 and selects a disconnection method for disconnecting the NFC communication link (see S38 in FIG. 4).

  The “situation” means a situation in which the NFC communication link should be disconnected, and is classified into poll continuation, listen continuation, poll end, and listen end. The “Poll continuation” means a situation in which, when the MFP 10, which is a Poll device described later, executes communication of target data, the communication of the next target data should be continued. “Listen continuation” refers to a situation in which when the MFP 10, which will be described later, performs communication of target data, communication of the next target data should be continued. The end of the poll means a situation where the MFP 10 that is a poll device should not continue to execute communication of the next target data when the communication of the target data is executed. “Listen end” means a situation in which when the MFP 10 which is a Listen device executes communication of target data, communication of the next target data should not be continued.

  “OS information” is a combination of type information indicating the type of an OS (Operating System) program and version information indicating the version of the OS program. The type information T1 is, for example, Android (registered trademark), and the type information T2 is, for example, Windows 8 (registered trademark). The version information V1 and V2 is version information of the OS program (for example, Android (registered trademark)) specified by the type information T1. The version information V1 is a newer version than the version information V2. For example, the version information V1 is Android (registered trademark) version 4.0.0 and a newer version, and the version information V2 is Android (registered trademark) version 2.3.4. The version information V3 is version information of an OS program (for example, Windows 8 (registered trademark)) specified by the type information T2. The version information V3 is, for example, the version SP1 of Windows 8 (registered trademark). Note that “any” described in the “OS information” column means that any OS information may be used, that is, the disconnection method is selected without depending on the OS information.

  “Mode” means a mode used in the NFC standard, and is classified into a P2P mode, a Reader mode, a Writer mode, and a CE mode. In the following, devices (MFP 10, portable terminal 50, etc.) capable of executing NFC communication are referred to as “NFC devices”. Hereinafter, the reader mode and the writer mode may be simply described as “R / W mode”.

  Some NFC devices can use all three modes of P2P mode, R / W mode, and CE mode, and only one or two of the above three modes can be used. There are also devices that can be used. In this embodiment, the MFP 10 is a device that can use all of the above three modes. However, the portable terminal 50 may be a device that can use all of the above three modes, and can use only two modes of the R / W mode and the CE mode among the above three modes. There may be.

The P2P mode is a mode for executing bidirectional communication between a pair of NFC devices.
For example, assume a situation where both the first NFC device and the second NFC device operate according to the P2P mode. In this case, a communication link for executing communication according to the P2P mode is established between the first NFC device and the second NFC device. For example, the first NFC device transmits the first target data to the second NFC device using the communication link. Thereafter, the second NFC device normally transmits the second target data to the first NFC device using the same communication link. Thereby, bidirectional communication is realized. An NFC device that is Type A of ISO / IEC 1443 and an NFC device that is Type F of ISO / IEC 18092 defined by the NFC Forum can operate according to the P2P mode, but an NFC device that is Type B of ISO / IEC 1443 Cannot operate according to the P2P mode.

  The R / W mode and the CE mode are modes for executing unidirectional communication between a pair of NFC devices. The CE mode is a mode for the NFC device to operate as a “card” that is a format defined by the NFC forum. Any of the Type A NFC device, the Type F NFC device, and the Type B NFC device can operate according to the CE mode. The Reader mode is a mode for reading data from an NFC device operating as a card in the CE mode. The writer mode is a mode for writing data to an NFC device operating as a card in the CE mode. In the Reader mode, data can also be read from an NFC standard card. In the writer mode, data can also be written to an NFC standard card.

  For example, a situation is assumed in which the first NFC device operates according to the Reader mode and the second NFC device operates according to the CE mode. In this case, a communication link for executing communication according to the Reader mode and the CE mode is established between the first NFC device and the second NFC device. The first NFC device can receive the target data from the second NFC device by executing an operation for reading the target data from the pseudo card in the second NFC device.

  Further, for example, a situation is assumed in which the first NFC device operates in accordance with the writer mode and the second NFC device operates in accordance with the CE mode. In this case, a communication link for executing communication according to the writer mode and the CE mode is established between the first NFC device and the second NFC device. The first NFC device can transmit the target data to the second NFC device by executing an operation for writing the target data to a pseudo card in the second NFC device.

  As described above, in order for a pair of NFC devices to perform NFC communication, various mode combinations are possible. For example, as combinations of modes of the MFP 10 and the portable terminal 50, the following five patterns are used: “P2P mode, P2P mode”, “Reader mode, CE mode”, “Writer mode, CE mode”, “CE mode, Reader "Mode", "CE mode, Writer mode" can be considered.

  “Disconnection method” means a method for disconnecting an NFC communication link, and includes a first hard disconnection, a second hard disconnection, a first soft disconnection, a second soft disconnection, and a soft + hardware. Classified as cutting. In the cutting method table 42, the column in which the cutting method is not described is a column corresponding to a combination of “situation” and “mode” that is not normally possible. For example, since a Poll device described later cannot operate according to the CE mode, a cutting method is described in each column corresponding to “Poll continuation” or “Poll end” and “CE”. Absent.

  The first hard disconnection is a method for disconnecting the communication link by stopping the operation of the NFC I / F 22 for 200 ms. Specifically, in the first hard disconnection, for example, the control unit 30 transmits a stop instruction for stopping the operation of the NFC I / F 22 to the NFC I / F 22. Thereby, the NFC I / F 22 temporarily stops all operations including reception of signals from the outside, transmission of signals to the outside, a poll operation described later, a listen operation described later, and the like. The control unit 30 transmits a restart instruction for restarting the operation of the NFC I / F 22 to the NFC I / F 22 after a standby period of 200 ms. As a result, the NFC I / F 22 resumes operation. As a result, the operation of the NFC I / F 22 can be stopped for 200 ms. The NFC I / F 22 that has resumed the operation returns to a state in which a Poll operation and a Listen operation described later can be performed.

  Note that the first hard disconnection is not limited to the method of transmitting the stop instruction and the restart instruction to the NFC I / F 22 as described above. For example, the control unit 30 may stop the power supply to the NFC I / F 22 for 200 ms. Even in this method, the operation of the NFC I / F 22 can be stopped for 200 ms. Any of the second hard disconnection, soft + hard disconnection, first hardware control (see FIG. 3), and second hardware control (see FIG. 3), which will be described later, sends a stop instruction and a restart instruction to the NFC I / F 22. May be used, or may be a method of stopping the power supply to the NFC I / F 22.

  The second hard disconnection is a method for disconnecting the communication link by stopping the operation of the NFC I / F 22 for 300 ms. The second hard disconnection is the same as the first hard disconnection except that the period (300 ms) during which the operation of the NFC I / F 22 is stopped is different from the first hard disconnection (200 ms).

  The first soft disconnection is a technique for disconnecting a communication link by transmitting a Deactivation command that is a command for disconnecting the communication link and receiving an OK command. The second soft disconnection is a technique for disconnecting a communication link by receiving a Deactivation command and transmitting an OK command. Soft + hardware disconnection is a technique for disconnecting a communication link by transmitting a Deactivation command, receiving an OK command, and then stopping the operation of the NFC I / F 22 for 10 ms.

  The first soft cutting and the second soft cutting are general cutting methods defined by the NFC Forum. Therefore, a general NFC device normally disconnects the communication link by using the first soft disconnection and the second soft disconnection. In contrast, the first hard cutting, the second hard cutting, and the soft + hard cutting are not general cutting methods, but are cutting methods specific to the MFP 10 of the present embodiment. As will be described in detail later, the MFP 10 refers to the cutting method table 42 and selects “situation”, “OS information”, and “mode” from a plurality of cutting methods (in this embodiment, five cutting methods). The communication link is disconnected by selecting a disconnection method according to the above. The reason why the selected cutting method changes according to the “situation” and the like will be described later in detail (described in the specific cases of FIGS. 8 to 12).

(Contents of operation control table 44; FIG. 3)
As illustrated in FIG. 3, the operation control table 44 is a table in which “situation”, “OS information”, “mode”, and “operation control method” are associated with each other. The “situation”, “OS information”, and “mode” are as described above. The “operation control method” means a method for controlling the operation of the NFC I / F 22 after the communication link is disconnected, and is classified into a first hardware control and a second hardware control. In the operation control table 44, a column in which no operation control method is described means that the operation control of the NFC I / F 22 is not executed after the communication link is disconnected.

  The first hardware control is a method of controlling the operation of the NFC I / F 22 by stopping the operation of the NFC I / F 22 for 200 ms, similarly to the first hard disconnection in FIG. The second hardware control is a method of controlling the operation of the NFC I / F 22 by stopping the operation of the NFC I / F 22 for 300 ms, similarly to the second hard disconnection in FIG.

  A general NFC device normally does not execute the first and second hardware controls. That is, the first and second hardware controls are methods unique to the MFP 10 of the present embodiment. The reason why the first and second hardware controls are executed will be described later in detail (described in the flowcharts of FIGS. 5 and 7).

(Configuration of mobile terminal 50)
The portable terminal 50 is a portable terminal such as a mobile phone (for example, a smartphone), a PDA, a notebook PC, a tablet PC, a portable music playback device, a portable video playback device, and the like. The portable terminal 50 includes a network I / F for connecting to a wireless network and an NFC I / F. Therefore, the portable terminal 50 can execute wireless communication with the MFP 10 via the network I / F and can execute wireless communication with the MFP 10 using the NFC I / F.

  The portable terminal 50 includes an application program (hereinafter referred to as “MFP application”) for causing the MFP 10 to execute various functions (for example, a print function, a scan function, etc.). Note that the MFP application may be installed on the portable terminal 50 from a server provided by the vendor of the MFP 10 or may be installed on the portable terminal 50 from a medium shipped with the MFP 10.

(Target data for communication)
Next, an example of target data that is a target of NFC communication executed between the MFP 10 and the portable terminal 50 is listed below.

(First example)
Assume a situation in which the MFP 10 receives print data from the portable terminal 50 and should execute a print function according to the print data. The user of the portable terminal 50 activates the MFP application of the portable terminal 50 and inputs an instruction for causing the MFP 10 to execute the printing function to the portable terminal 50. In this case, the portable terminal 50 transmits the first target data including the print execution command to the MFP 10 using NFC communication. Note that the first target data does not include print data.

  The MFP 10 receives the first target data from the portable terminal 50 via the NFC I / F 22. As described above, the communication speed of NFC communication is slower than the communication speed of network wireless communication. For this reason, if NFC communication is used as communication of print data from the portable terminal 50 to the MFP 10, it may take a long time for communication of print data. Therefore, in this example, a configuration is adopted in which the MFP 10 receives print data from the portable terminal 50 using network wireless communication. In order to employ such a configuration, the portable terminal 50 needs to know the wireless setting for executing network wireless communication with the MFP 10. Accordingly, when the MFP 10 receives the first target data including the print execution command from the portable terminal 50, the MFP 10 instructs the portable terminal 50 to use the wireless setting and the wireless setting via the NFC I / F 22. The second target data including the instruction command to be transmitted is transmitted to the portable terminal 50.

  Accordingly, the MFP 10 and the portable terminal 50 can communicate print data by executing network wireless communication instead of NFC communication. Therefore, the MFP 10 can execute the printing function.

(Second example)
Assume a situation in which the MFP 10 executes a scan, generates scan data, and executes a scan function of transmitting the scan data to the portable terminal 50. The user of the portable terminal 50 activates the MFP application of the portable terminal 50 and inputs an instruction for causing the MFP 10 to execute the scan function to the portable terminal 50. In this case, the portable terminal 50 transmits the first target data including the scan execution command to the MFP 10 using NFC communication.

  The MFP 10 receives the first target data from the portable terminal 50 via the NFC I / F 22. If NFC communication is used as scan data communication from the MFP 10 to the portable terminal 50, the scan data communication may take a long time. Therefore, in this example, a configuration is employed in which the MFP 10 transmits scan data to the portable terminal 50 using network wireless communication. Therefore, when the MFP 10 receives the first target data including the scan execution command from the portable terminal 50, the MFP 10 instructs the portable terminal 50 to use the wireless setting and the wireless setting via the NFC I / F 22. The second target data including the instruction command to be transmitted is transmitted to the portable terminal 50.

  Thereby, the MFP 10 and the portable terminal 50 can communicate scan data by executing network wireless communication instead of NFC communication. Therefore, the MFP 10 can execute the scan function.

(Third example)
A situation is assumed in which the portable terminal 50 should transmit setting information to be used by the MFP 10 to the MFP 10. As the setting information, for example, print setting information (for example, print resolution, paper size, etc.) for the MFP 10 to execute the print function, scan setting information (for example, scan resolution, etc.) for the MFP 10 to execute the scan function, etc. Communication setting information (for example, IP address, subnet mask, gateway address, etc.) for the MFP 10 to execute a communication function can be listed.

  The user of the portable terminal 50 activates the MFP application of the portable terminal 50 and inputs setting information to be used by the MFP 10 to the portable terminal 50. In this case, the portable terminal 50 transmits the first target data including setting information and a setting command for causing the MFP 10 to set the setting information to the MFP 10 using NFC communication.

  The MFP 10 receives the first target data from the portable terminal 50 via the NFC I / F 22. The MFP 10 stores the setting information included in the first target data in the memory 34 as setting information to be used by the MFP 10. Thereby, the MFP 10 can execute various functions using the setting information. When the MFP 10 receives the first target data from the mobile terminal 50, the MFP 10 transmits the second target data including a response command indicating that the first target data has been received via the NFC I / F 22. 50.

(Fourth example)
Assume a situation in which the mobile terminal 50 should transmit address information included in the address book currently used by the mobile terminal 50 to the MFP 10. The user of the portable terminal 50 activates the MFP application of the portable terminal 50 and inputs an instruction for transmitting address information to the MFP 10 to the portable terminal 50. In this case, the portable terminal 50 transmits the first target data including the address information and a setting command for causing the MFP 10 to set the address information to the MFP 10 using NFC communication.

  The MFP 10 receives the first target data from the portable terminal 50 via the NFC I / F 22. The MFP 10 adds the address information included in the first target data to the address book currently used by the MFP 10 (that is, the address book in the memory 34). Thereby, the MFP 10 can execute the communication function using the address information. When the MFP 10 receives the first target data from the mobile terminal 50, the MFP 10 transmits the second target data including a response command indicating that the first target data has been received via the NFC I / F 22. 50.

(Fifth example)
In the first example described above, a configuration is employed in which the MFP 10 transmits print data to the portable terminal 50 using network wireless communication. Instead of this, for example, the MFP 10 may receive first target data including print data and a print execution command from the mobile terminal 50 via the NFC I / F 22. In this case, the MFP 10 may transmit second target data including a response command indicating that the first target data has been received to the portable terminal 50 via the NFC I / F 22.

  Although various examples of the target data have been described, the combination of the “first target data” and the “second target data” is not limited to the above first to fifth examples, and other combinations may be used. Good. That is, the “first target data” may be any type of data as long as the MFP 10 receives data using NFC communication, and the “second target data” Any type of data may be used as long as it is data generated by processing a command included in one target data (that is, data different from the first target data).

  In the first to fifth examples, when the MFP 10 receives the first target data and transmits the second target data, a series of communication of the plurality of target data is completed. Therefore, in the above first to fifth examples, for example, as shown in the pattern B in the command table 40 of FIG. 1, the command included in the first target data corresponds to the “B1 command”. When the command included in the two target data corresponds to the “B2 command” and communication of these two commands is completed, a series of communication of the plurality of target data is completed.

  However, as shown in the pattern A in the command table 40 of FIG. 1, three or more target data may be communicated. For example, in the third example described above, the MFP 10 receives from the portable terminal 50 the first target data including (1) a part of setting information and a setting command (for example, “A1 command”). (2) Next, the second target data including a response command (for example, “A2 command”) is transmitted to the portable terminal 50. (3) Next, the remaining information of the setting information and the setting command ( For example, the third target data including “A3 command”) is received from the portable terminal 50. (4) Next, the fourth target data including the response command (for example, “A4 command”) is transmitted to the portable terminal 50. May be.

(Poll operation and Listen operation)
Next, the poll operation and listen operation executed by the NFC device will be described. For example, in the MFP 10, the CPU 32 does not execute the poll operation and listen operation according to the programs 36 and 38, but the NFC I / F 22 executes the poll operation and listen operation. The poll operation is an operation for transmitting a polling signal and receiving a response signal for the polling signal. The Listen operation is an operation that receives a polling signal and transmits a response signal to the polling signal.

  The NFC I / F 22 of the MFP 10 performs a poll mode for executing the poll operation, a listen mode for executing the listen operation, a mode in which neither the poll operation nor the listen operation is executed (hereinafter referred to as “non-execution mode”). Can be operated in any one of the modes. The NFC I / F 22 sequentially operates in a poll mode, a listen mode, and a non-execution mode. For example, the NFC I / F 22 performs a set of operations that operate in the poll mode, then operate in the listen mode, and then operate in the non-execution mode. The NFC I / F 22 repeatedly executes the above one set of operations.

  In the poll mode, the NFC I / F 22 transmits a polling signal and monitors whether a response signal is received. Specifically, the NFC I / F 22 transmits a polling signal (that is, a polling signal corresponding to Type A) that can be responded to by the Type A NFC device, and monitors the reception of the response signal for a predetermined time. 2) If a response signal is not received, a Type B NFC device transmits a polling signal that can be responded (that is, a polling signal corresponding to Type B), monitors reception of the response signal for a predetermined time, and (3) If not received, the operation of transmitting a polling signal (that is, a polling signal corresponding to Type F) that can be answered by the Type F NFC device and monitoring the reception of the response signal for a predetermined time is repeated. When the NFC I / F 22 receives a response signal from the NFC device within a predetermined time, it can be said that the NFC device is a Type NFC device corresponding to the polling signal received immediately before the response signal is transmitted. When the NFC I / F 22 receives a response signal, the NFC I / F 22 further transmits to the NFC device an inquiry signal inquiring in which mode the NFC device that is the transmission source of the response signal can operate. As a result, the NFC I / F 22 receives the operable mode signal from the NFC device. The operable mode signal indicates that the NFC device can operate in either the P2P mode or the CE mode, or indicates that the NFC device can operate only in the CE mode.

  In the Listen mode, the NFC I / F 22 monitors reception of a polling signal and transmits a response signal when receiving the polling signal. The NFC I / F 22 transmits a response signal to the NFC device that is the source of the polling signal only when receiving the type polling signal corresponding to the NFC I / F 22. When transmitting a response signal to the NFC device, the NFC I / F 22 receives an inquiry signal from the NFC device and transmits an operable mode signal to the NFC device.

  In the non-execution mode, the NFC I / F 22 does not transmit a polling signal, and does not transmit a response signal even when the polling signal is received.

  The portable terminal 50 also repeatedly executes the above one set of operations. Therefore, for example, the distance between the MFP 10 and the portable terminal 50 is less than 10 cm, and the period in which the NFC I / F 22 of the MFP 10 operates in the poll mode and the period in which the portable terminal 50 operates in the listen mode are If they match, the NFC I / F 22 transmits a polling signal to the portable terminal 50 and executes a poll operation for receiving a response signal from the portable terminal 50. For example, if the distance between the MFP 10 and the portable terminal 50 is less than 10 cm and the period during which the NFC I / F 22 operates in the Listen mode and the period during which the portable terminal 50 operates in the Poll mode match, The I / F 22 receives a polling signal from the mobile terminal 50 and executes a Listen operation for transmitting a response signal to the mobile terminal 50.

  In the NFC standard, an NFC device that has performed a poll operation (hereinafter referred to as a “Poll device”) can operate in the P2P mode or the R / W mode, but cannot operate in the CE mode. Therefore, when the MFP 10 is a poll device, the CPU 32 first determines that the MFP 10 should operate in the P2P mode or the R / W mode. In the NFC standard, an NFC device that has performed the Listen operation (hereinafter referred to as “Listen device”) can operate in the P2P mode or the CE mode, but cannot operate in the R / W mode. Therefore, as described above, when the MFP 10 is a Poll device, the CPU 32 determines that the MFP 10 should operate in the P2P mode or the CE mode.

  When the NFC I / F 22 executes the poll operation, each process for subsequent communication is taken over by the CPU 32. Specifically, information indicating which mode of operation the portable terminal 50 can execute (that is, information indicated by the received operable mode signal) is transferred from the NFC I / F 22 to the CPU 32. The CPU 32 determines in which mode the MFP 10 should operate based on the information delivered from the NFC I / F 22. For example, when the MFP 10 is operable in all modes and the received operable mode signal indicates that the MFP 10 can operate in the P2P mode and the CE mode, the CPU 32 operates the MFP 10 in the P2P mode. Decide what to do. In this case, the CPU 32 transmits an activation command corresponding to the P2P mode to the portable terminal 50 (S112 in FIG. 6). The Activation command is a command adopted in the NFC standard, and is a command for establishing an NFC communication link between the MFP 10 and the portable terminal 50. Further, for example, when the MFP 10 is operable in all modes and the received operable mode signal indicates that it is operable only in the CE mode, the CPU 32 determines that the MFP 10 is in the R / W mode. Decide what to do. In this case, the CPU 32 transmits an activation command corresponding to the R / W mode to the portable terminal 50 (S160 in FIG. 7).

  Further, when the NFC I / F 22 executes the Listen operation, each process for subsequent communication is taken over by the CPU 32. Specifically, the CPU 32 receives an activation command corresponding to the mode in which the portable terminal 50 should operate from the portable terminal 50 (see S10 in FIG. 4). When receiving an activation command corresponding to the P2P mode, the CPU 32 determines that the MFP 10 should operate in the P2P mode, and when receiving an activation command corresponding to the R / W mode, the MFP 10 operates in the CE mode. Decide what to do.

  As described above, when the NFC I / F 22 performs the poll operation or the listen operation, the CPU 32 can know that the portable terminal 50 exists in the vicinity of the MFP 10, and in which mode the MFP 10 should operate. Each process for subsequent communication (see FIGS. 4 to 7 described later) is executed.

(Processes executed by the MFP 10; FIGS. 4 to 7)
Next, processing executed by the MFP 10 will be described with reference to FIGS. The CPU 32 executes the processes shown in FIGS. 4 to 7 according to the programs 36 and 38 in the memory 34. In the following, first, when the NFC I / F 22 executes the Listen operation (that is, when the MFP 10 is a Listen device), the process executed by the CPU 32 (FIGS. 4 and 5; hereinafter referred to as “MFP Listen process”). ) Is explained. Next, when the NFC I / F 22 executes the poll operation (that is, when the MFP 10 is a poll device), the contents of the processing executed by the CPU 32 (FIGS. 6 and 7; hereinafter referred to as “MFP poll processing”). Will be explained.

  The application program 36 includes a code that instructs the CPU 32 to start the Listen process according to the protocol stack 38 using the API of the protocol stack. In a state where the CPU 32 is operating in accordance with the application program 36, the CPU 32 starts the Listen process according to the protocol stack 38 when receiving an instruction to start the Listen process according to the protocol stack 38. The application program 36 further includes code for instructing the CPU 32 to start poll processing according to the protocol stack 38 using the API of the protocol stack 38. In a state where the CPU 32 is operating according to the application program 36, the CPU 32 starts the poll processing according to the protocol stack 38 when receiving a command for starting the poll processing according to the protocol stack 38.

(Listen processing of MFP; FIGS. 4 and 5)
As described above, when the NFC I / F 22 performs the Listen operation (that is, when the mobile terminal 50 executes the Poll operation), the mobile terminal 50 activates the activation command corresponding to the mode in which the mobile terminal 50 should operate. Is transmitted to the MFP 10. In S <b> 10, the CPU 32 receives an activation command from the portable terminal 50 via the NFC I / F 22.

  Next, in S12, the CPU 32 determines whether the MFP 10 should operate in the P2P mode or the CE mode. When receiving the activation command corresponding to the P2P mode, the CPU 32 determines that the MFP 10 should operate in the P2P mode (YES in S12), and proceeds to S14. On the other hand, when the CPU 32 receives the activation command corresponding to the R / W mode, the CPU 32 determines that the MFP 10 should operate in the CE mode (NO in S12), and proceeds to S62 in FIG. Note that the CPU 32 cannot receive an activation command corresponding to the CE mode. As described above, the Poll device (that is, the portable terminal 50) can operate in the P2P mode or the R / W mode, but cannot operate in the CE mode.

(Listen processing of MFP; P2P mode)
In S <b> 14, the CPU 32 transmits a response command (that is, an OK command) to the activation command to the portable terminal 50 via the NFC I / F 22. As a result, an NFC communication link is established between the MFP 10 and the portable terminal 50. That is, the CPU 32 can appropriately establish a communication link by receiving the activation command and transmitting the OK command.

  In the Listen process of the MFP, the activation command cannot be transmitted from the MFP 10 to the portable terminal 50. This is because the Poll device (that is, the portable terminal 50) can transmit the Activation command, but the Listen device (that is, the MFP 10) cannot transmit the Activation command.

  Next, in S16, the CPU 32 starts a confirmation command response process. The confirmation command is a command transmitted from the Poll device to the Listen device, and is a command for confirming whether or not to maintain the communication link. As described above, at present, the MFP 10 is a Listen device, and the portable terminal 50 is a Poll device. Accordingly, in the confirmation command response process, the CPU 32 receives the confirmation command from the portable terminal 50 via the NFC I / F 22 and sends a response command (that is, an OK command) to the confirmation command via the NFC I / F 22. To the mobile terminal 50.

  Although not shown in the flowchart, when starting the confirmation command response process in S16, the CPU 32 continuously executes the confirmation command response process until S40 described later is executed. The CPU 32 executes the processes of S10 to S16 according to the protocol stack 38.

  The protocol stack 38 includes code for instructing the CPU 32 to output data indicating the occurrence of a confirmation command reception event. When receiving the first confirmation command in S16, the CPU 32 outputs data indicating the occurrence of the confirmation command reception event. The application program 36 includes a code that instructs the CPU 32 to execute S18 when data indicating the occurrence of the confirmation command reception event is output. Accordingly, when receiving the first confirmation command in S16, the CPU 32 executes S18 in accordance with the application program 36.

  In S <b> 18, the CPU 32 determines whether or not the transmission flag in the memory 34 is “1”. The transmission flag is set to “0” or “1” in S28, S36, or S37 described later. If the transmission flag in the memory 34 is “1”, the CPU 32 determines YES in S18 and proceeds to S30. On the other hand, when the transmission flag in the memory 34 is “0”, the CPU 32 determines NO in S18 and proceeds to S20. If YES or NO in S18, the CPU 32 sets data indicating that it operates as a client communicating according to SNEP (abbreviation of Simple NDEF Exchange Protocol) using the API of the protocol stack 38. NDEF is an abbreviation for NFC Data Exchange Format. The protocol stack 38 includes code for instructing the CPU 32 to execute negotiation for operating as a client in accordance with the setting using the API. Therefore, after finishing S18, the CPU 32 executes the process of S20 or S30 according to the protocol stack 38.

  In S <b> 20, the CPU 32 performs negotiation with the portable terminal 50 via the NFC I / F 22. Specifically, the CPU 32 first determines that the MFP 10 operates as a SNEP client. Next, the CPU 32 executes communication according to the SNEP so that the MFP 10 operates as a client and the portable terminal 50 operates as a SNEP server. Accordingly, the portable terminal 50 operates as a server that executes processing in response to a request from the client (that is, the MFP 10).

  In S <b> 20, the CPU 32 further notifies the portable terminal 50 that the MFP 10 executes data reception (that is, the portable terminal 50 executes data transmission). Thereby, the portable terminal 50 can know that the target data should be transmitted to the MFP 10, and transmits the target data to the MFP 10.

  Next, in S22, the CPU 32 receives the target data from the portable terminal 50 via the NFC I / F 22 using the communication link established in S14 according to the protocol stack 38. The target data received in S22 includes a command to be processed by the CPU 32. For example, in the first, second, or fifth example, the first target data received in S22 includes a print execution command or a scan execution command. In the third or fourth example, The first target data received in S22 includes a setting command. Further, the target data received in S22 includes OS information related to the OS program installed in the portable terminal 50. The OS information includes type information (for example, “T1”) indicating the type of the OS program and version information (for example, “V1”) indicating the version of the OS program.

  The protocol stack 38 includes code for instructing the CPU 32 to output data indicating the occurrence of the reception event of the target data. When receiving the target data in S22, the CPU 32 outputs data indicating the occurrence of the target data reception event. The application program 36 includes code for instructing the CPU 32 to execute S24 when data indicating the occurrence of the reception event of the target data is output from the protocol stack 38. Accordingly, when receiving the target data in S22, the CPU 32 executes S24 according to the application program 36.

  In S24, the CPU 32 processes the target data received in S22 according to the application program 36. For example, in the first or second example described above, the CPU 32 uses the wireless setting and the wireless setting according to the print execution command or the scan execution command included in the first target data received in S22. Second target data including an instruction command for instructing the portable terminal 50 is generated. Further, for example, in the third example, the CPU 32 stores the setting information included in the first target data in the memory 34 in accordance with the setting command included in the data in the first target received in S22. Second target data including a response command indicating that the setting information has been received is generated. Further, for example, in the above fourth example, the CPU 32 stores the address information included in the first target data in the address book in the memory 34 in accordance with the setting command included in the first target data received in S22. In addition, second target data including a response command indicating that the address information has been received is generated. Further, for example, in the fifth example, the CPU 32 executes a print function using the print data included in the first target data in accordance with the print execution command included in the first target data received in S22. Then, second target data including a response command indicating that the print data has been received is generated.

  Next, in S26, the CPU 32 refers to the command table 40 in the memory 34 according to the application program 36, and determines whether or not the command included in the target data received in S22 is the last command. For example, when the command included in the target data received in S22 is “A1 command”, “B1 command”, or “B3 command” in the command table 40, communication such as “A2 command” is performed. Since it should be continuously executed, the CPU 32 determines that it is not the last command (NO in S26), and proceeds to S28.

  In S28, according to the application program 36, the CPU 32 sets the transmission flag in the memory 34 to “1” and sets the continuation flag in the memory 34 to “1”. Since the transmission flag is set to “1”, the CPU 32 can transmit the target data to the portable terminal 50 when the next communication link is established. Further, since the continuation flag is set to “1”, in S38 described later, the CPU 32 can know that the current status of the MFP 10 is “Listen continuation”. When S28 ends, the process proceeds to S38.

  On the other hand, if the CPU 32 determines that it is the last command (YES in S26), it proceeds to S37. In S37, the CPU 32 sets the transmission flag in the memory 34 to “0” and sets the continuation flag in the memory 34 to “0” according to the application program 36. Since the transmission flag is set to “0”, the CPU 32 can receive the target data from the portable terminal 50 when the next communication link is established. Further, since the continuation flag is set to “0”, in S38 described later, the CPU 32 can know that the current status of the MFP 10 is “Listen end”. When S37 ends, the process proceeds to S38.

  If YES in S18 (that is, if the transmission flag is “1”), in S30, the CPU 32 operates as a client in the P2P mode according to the protocol stack 38, as in S20, and the portable terminal 50 is Negotiation is performed to operate as a server in P2P mode. In S <b> 30, the CPU 32 further notifies the portable terminal 50 that the MFP 10 executes data transmission (that is, the portable terminal 50 executes data reception). Thereby, the portable terminal 50 stands by until the target data is received from the MFP 10.

  Next, in S32, the CPU 32 transmits the target data to the mobile terminal 50 via the NFC I / F 22 using the communication link established in S14 using the API of the protocol stack 38 according to the application program 36. To do. For example, in the above first to fifth examples, the CPU 32 is included in the first target data in S24 of the previous MFP listen process or S124 of the previous MFP poll process (FIG. 6), for example. The second target data is generated by processing the command. In this case, in S <b> 32, the CPU 32 transmits the generated second target data to the portable terminal 50.

  Next, in S34, the CPU 32 refers to the command table 40 in the memory 34 according to the application program 36, and determines whether or not the command included in the target data transmitted in S32 is the last command. For example, when the command included in the target data transmitted in S32 is “A2 command” in the command table 40, communication such as “A3 command” should be continuously executed. The CPU 32 determines that it is not the last command (NO in S34), and proceeds to S36. In S36, according to the application program 36, the CPU 32 sets the transmission flag in the memory 34 to “0” and sets the continuation flag in the memory 34 to “1”. When S36 ends, the process proceeds to S38.

  On the other hand, for example, when the command included in the target data transmitted in S32 is the “B2 command” in the command table 40, the CPU 32 determines that it is the last command (YES in S34). , Go to S37. In S37, the CPU 32 sets the transmission flag in the memory 34 to “0” and sets the continuation flag in the memory 34 to “0” according to the application program 36. When S37 ends, the process proceeds to S38.

  In S38, the CPU 32 refers to the disconnection method table 42 in the memory 34, the value of the continuation flag in the memory 34, and the OS information of the portable terminal 50 according to the application program 36, and uses a plurality of disconnection methods. From among them, a disconnection method for disconnecting the communication link established in S14 is selected. Since the printer 10 is a listen device at the time of S38, the current status of the printer 10 is either “listen continuation” or “listen end”. When the continuation flag is “1”, the current status of the printer 10 is “Listen continuation”. When the continuation flag is “0”, the current status of the printer 10 is “Listen end”. It is. At the time of S38, the mode of the printer 10 is “P2P”.

  For example, when S38 is executed through S22, the target data received in S22 includes the OS information of the portable terminal 50. Therefore, in S38, the CPU 32 selects a cutting method using the OS information of the mobile terminal 50 included in the target data received in S22.

  Further, for example, when S38 is executed via S32, S22 is not executed. However, as described above, in this embodiment, the MFP 10 performs the first target data in a series of communication of a plurality of target data. Is not transmitted to the portable terminal 50, and the first target data is received from the portable terminal 50. Therefore, when S32 is executed, the CPU 32 receives the target data from the portable terminal 50 when the previous communication link of the communication link established in S14 is established. Therefore, in S38, the CPU 32 selects the disconnection method using the OS information of the mobile terminal 50 included in the target data (that is, the target data previously received from the mobile terminal 50).

  For example, when the current status of the printer 10 is “Listen Continue”, in S38, the CPU 32 selects a cutting method according to the OS information of the portable terminal 50. Specifically, when the OS information of the portable terminal 50 includes “T1” and “V1”, the CPU 32 selects the first hard disconnection, and the OS information of the portable terminal 50 indicates “T1” and “V1”. If it includes “V2”, the second hard disconnection is selected. If the OS information of the portable terminal 50 includes “T2” and “V3”, the second hard disconnection is selected (see FIG. 2). . On the other hand, for example, if the current status of the printer 10 is “Listen end”, in S38, the CPU 32 determines the second regardless of the OS information of the portable terminal 50 (see “any” in FIG. 2). Select soft cutting.

  Next, in S40, the CPU 32 disconnects the communication link established in S14 by using the disconnection method selected in S38. For example, if the cutting method selected in S38 is the second soft cutting, in S40, the CPU 32 first uses the API of the protocol stack 38 in accordance with the application program 36, and the confirmation command started in S16. The response process is terminated. That is, even if the CPU 32 receives a confirmation command from the portable terminal 50, the CPU 32 does not transmit a response command (that is, an OK command) to the confirmation command to the portable terminal 50. Thereby, the mobile terminal 50 can know that the MFP 10 does not want to maintain the communication link, and transmits a Deactivation command for disconnecting the communication link to the MFP 10. Therefore, the CPU 32 receives a Deactivation command from the portable terminal 50 via the NFC I / F 22 according to the protocol stack 38. In this case, the CPU 32 transmits a response command (that is, an OK command) to the Deactivation command to the portable terminal 50 via the NFC I / F 22 according to the protocol stack 38. As a result, the communication link established in S14 is disconnected.

  It should be noted that the Deactivation command cannot be transmitted from the MFP 10 to the portable terminal 50 in the listen process of the MFP. This is because the Poll device (that is, the portable terminal 50) can transmit the Deactivation command, but the Listen device (that is, the MFP 10) cannot transmit the Deactivation command.

  For example, when the disconnection method selected in S38 is the first hard disconnection, in S40, the CPU 32 disconnects the power supply of the NFC I / F 22 for 200 ms and reconnects. Thereby, the operation of the NFC I / F 22 is temporarily stopped for 200 ms. For example, when the disconnection method selected in S38 is the second hard disconnection, in S40, the CPU 32 disconnects the power of the NFC I / F 22 for 300 ms and reconnects it. Thereby, the operation of the NFC I / F 22 is temporarily stopped for 300 ms. As a result, the NFC I / F 22 temporarily stops all operations including external signal reception, external signal transmission, poll operation, listen operation, and the like. Therefore, the CPU 32 cannot execute the confirmation command response process started in S16 via the NFC I / F 22.

  If the disconnection method selected in S38 is the first or second hard disconnection, in S40, the CPU 32 inputs the above stop instruction to the NFC I / F 22, and the CPU 32 conforms to the protocol stack 38. After that, the above restart instruction may be input to the NFC I / F 22 to restart the operation of the CPU 32 according to the protocol stack 38. Also in this case, the operation of the NFC I / F 22 (that is, all operations including reception of signals from the outside, transmission of signals to the outside, poll operation, listen operation, etc.) can be temporarily stopped.

  When the first or second hard disconnection is executed, the portable terminal 50 cannot receive a response command (that is, an OK command) for the confirmation command, as in the case of the second soft disconnection. In this case, the portable terminal 50 transmits a Deactivation command for disconnecting the communication link to the MFP 10, but since the operation of the NFC I / F 22 of the MFP 10 is stopped, a response command (that is, an OK command) to the Deactivation command Can not receive. Therefore, the portable terminal 50 determines that a time-out has occurred, and ends the process for maintaining the communication link (that is, the process of transmitting a confirmation command, etc.). As a result, the communication link established in S14 is disconnected. When S40 ends, the listen process of the MFP ends.

  Although not shown in the cutting method table 42 in FIG. 2 and the flowchart in FIG. 4, the OS information of the portable terminal 50 is different from “T1” and “T2” (for example, “T3” indicating iOS). If included, the CPU 32 may execute bidirectional communication of a plurality of target data using the same communication link without executing S38 and S40 (that is, without disconnecting the communication link). .

(Listen processing of MFP; CE mode (FIG. 5))
Next, with reference to FIG. 5, the contents of the process when it is determined NO in S12 of FIG. 4 (that is, when it is determined that the MFP 10 should operate in the CE mode) will be described. S62 is the same as S14 of FIG. Note that when the MFP 10 operates in the CE mode and the portable terminal 50 operates in the R / W mode, the confirmation command response process (see S16 in FIG. 2) is not executed unlike in the P2P mode. This is because it is not necessary to confirm whether or not to maintain a communication link because it is a mode for unidirectional communication (that is, only one communication of target data is performed). .

  Note that S62 is executed according to the protocol stack 38. Further, S64, S68, S70, S72, S76, S78, S82, and S86 are executed according to the application program 36. S66, S74, S80, S84, and S88 are executed using the API of the protocol stack 38 in accordance with the application program 36.

  S64 to S72 are the same as S18 and S22 to S28 in FIG. S74 to S78 are the same as S32 to S36 of FIG. If S72 or S78 is passed, the process proceeds to S80. If YES in S70 or YES in S76, the process proceeds to S86. S86 is the same as S37 of FIG. When S86 ends, the process proceeds to S88.

  In S80 or S88, the CPU 32 first refers to the disconnection method table 42, and selects a disconnection method for disconnecting the communication link established in S62. At the time of S80 or S88, the current status of the MFP 10 is either “Listen Continue” or “Listen End”, and the mode of the MFP 10 is “CE”. Therefore, the CPU 32 selects the second soft disconnection regardless of the OS information of the portable terminal 50 (see FIG. 2). In S80 or S88, the CPU 32 disconnects the communication link established in S62 using the selected second soft disconnection. The contents of the second soft cutting are as described above. When S80 ends, the Listen process of the MFP ends after S82 and S84 are executed. On the other hand, when S88 ends, S82 and S84 are not executed, and the Listen process of the MFP ends.

  In S82, the CPU 32 refers to the operation control table 44 in the memory 34 and the OS information of the portable terminal 50, and selects one operation control method from among a plurality of types of operation control methods. In S <b> 82, the CPU 32 selects an operation control method according to the OS information of the mobile terminal 50. For example, when S82 is executed through S66, in S82, the CPU 32 selects an operation control method using the OS information of the portable terminal 50 included in the target data received in S66. Further, for example, when S82 is executed via S74, in S82, the CPU 32 uses the OS information of the mobile terminal 50 included in the target data received last time from the mobile terminal 50 to perform an operation control method. Select. Specifically, when the OS information of the portable terminal 50 includes “T1” and “V1”, the CPU 32 selects the first hardware control, and the OS information of the portable terminal 50 indicates “T1” and “V1”. If it includes “V2”, the second hardware control is selected, and if the OS information of the portable terminal 50 includes “T2” and “V3”, the second hardware control is selected (see FIG. 3). .

  In S84, the CPU 32 executes an operation control process using the operation control method selected in S82. For example, when the operation control method selected in S82 is the first hardware control, in S84, the CPU 32 temporarily stops the operation of the NFC I / F 22 for 200 ms. For example, when the operation control method selected in S82 is the second hardware control, in S84, the CPU 32 temporarily stops the operation of the NFC I / F 22 for 300 ms.

  When the communication link is disconnected in S80, the mobile terminal 50 sequentially operates again in the poll mode and the listen mode. However, since the operation of the NFC I / F 22 of the MFP 10 is temporarily stopped in S84, the portable terminal 50 does not receive a response signal even if it transmits a polling signal. In addition, the portable terminal 50 does not receive a polling signal from the MFP 10. For this reason, the mobile terminal 50 can detect that the distance between the MFP 10 and the mobile terminal 50 has increased, that is, that the communication partner has moved away.

  The reason why the portable terminal 50 detects the separation of the communication partner (that is, the operation control process of S84 is executed) is as follows. In the communication link corresponding to the CE mode and the R / W mode, it is assumed that only one communication of target data is executed. Therefore, each of the pair of NFC devices normally disconnects the communication link when the target data is communicated according to the CE mode and the R / W mode. After that, if the pair of NFC devices continue to be kept close to each other, the pair of NFC devices executes the poll operation and the listen operation again to re-establish the communication link and execute the communication of the same target data. Can do. That is, when a state where a pair of NFC devices are close to each other is maintained, an event that the same target data is communicated many times may occur.

  Therefore, the NFC device normally does not detect the separation of the communication partner after disconnecting the communication link corresponding to the CE mode and the R / W mode, and even if the Poll operation and the Listen operation are performed again, the communication link Is programmed not to establish again. The NFC device, for example, transmits a polling signal several times, and does not receive a response signal from the communication partner or does not receive a polling signal from the communication partner for a predetermined period. Is detected. When the NFC device detects the separation of the communication partner in this manner, the NFC device can reestablish a communication link with the same communication partner.

  In the present embodiment, the communication of the second target data is executed after the communication of the first target data is executed. Therefore, after the communication link for communication of the first target data is disconnected, even if the state where the MFP 10 and the portable terminal 50 are close to each other is maintained, the new communication for the communication of the second target data is performed. A mechanism to re-establish a reliable communication link is necessary. This mechanism is the operation control process of S84. In other words, if the MFP 10 executes the operation control process of S84, the portable terminal 50 can detect the separation of the MFP 10 even if the state where the MFP 10 and the portable terminal 50 are close to each other is maintained. Thereafter, if the MFP 10 and the portable terminal 50 execute the poll operation and the listen operation, the communication link can be established again between the MFP 10 and the portable terminal 50.

(Poll processing of MFP; FIGS. 6 and 7)
Next, the contents of the poll processing of the MFP will be described with reference to FIGS. As described above, when the NFC I / F 22 executes the poll operation, the MFP 10 operates in one of the P2P mode and the R / W mode according to the received operable mode signal. In S110, the CPU 32 determines whether the MFP 10 should operate in the P2P mode or the R / W mode based on the received operable mode signal. If the CPU 32 determines that the MFP 10 should operate in the P2P mode (YES in S110), the CPU 32 proceeds to S112, and if it determines that the MFP 10 should operate in the R / W mode (NO in S110). The process proceeds to S160 in FIG.

(Poll processing of MFP; P2P mode (FIG. 6))
S110, S112, S114, and S116 are executed according to the protocol stack 38. S118, S124, S126, S128, S134, S136, S137, and S138 are executed according to the application program 36. Further, S120, S122, S130, S132, and S140 are executed using the API of the protocol stack 38 in accordance with the application program 36.

  In S112, the CPU 32 transmits an activation command corresponding to the P2P mode to the portable terminal 50 via the NFC I / F 22. Next, in S <b> 114, the CPU 32 receives a response command (that is, an OK command) for the activation command from the portable terminal 50 via the NFC I / F 22. As a result, an NFC communication link is established between the MFP 10 and the portable terminal 50.

  Next, in S116, the CPU 32 starts a confirmation command transmission process. In the confirmation command transmission process, the CPU 32 transmits a confirmation command to the portable terminal 50 via the NFC I / F 22, and a response command (that is, OK) to the confirmation command from the portable terminal 50 via the NFC I / F 22. Command). When the confirmation command transmission process is started in S116, the CPU 32 continues to execute the confirmation command transmission process until S140 described later is executed.

  S118 to S128 are the same as S18 to S28 of FIG. S130 to S137 are the same as S30 to S37 of FIG.

  In S138, the CPU 32 refers to the disconnection method table 42 in the memory 34, the value of the continuation flag in the memory 34, and the OS information of the portable terminal 50, and from among a plurality of disconnection methods, in S114. Select a disconnect method for disconnecting an established communication link. Since the printer 10 is a poll device at the time of S138, the current status of the printer 10 is either “Poll continuation” or “Poll end”. When the continuation flag is “1”, the current status of the printer 10 is “Poll continuation”. When the continuation flag is “0”, the current status of the printer 10 is “Poll end”. It is. At the time of S138, the mode of the printer 10 is “P2P”.

  For example, when S138 is executed through S122, in S138, the CPU 32 selects a cutting method using the OS information of the portable terminal 50 included in the target data received in S122. Further, for example, when S138 is executed via S132, in S138, the CPU 32 uses the OS information of the mobile terminal 50 included in the target data received from the mobile terminal 50 last time to perform a disconnection method. select.

  For example, when the current status of the printer 10 is “Poll continuation”, in S138, the CPU 32 selects a cutting method according to the OS information of the portable terminal 50. Specifically, when the OS information of the portable terminal 50 includes “T1” and “V1”, the CPU 32 selects the first hard disconnection, and the OS information of the portable terminal 50 indicates “T1” and “V1”. When it includes “V2”, the first soft disconnection is selected, and when the OS information of the portable terminal 50 includes “T2” and “V3”, soft + hard disconnection is selected (see FIG. 2). On the other hand, for example, if the current status of the printer 10 is “Poll end”, in S138, the CPU 32 determines the first regardless of the OS information of the portable terminal 50 (see “any” in FIG. 2). Select soft cutting.

  Next, in S140, the CPU 32 disconnects the communication link established in S114 using the disconnection method selected in S138. For example, when the cutting method selected in S138 is the first soft cutting, in S140, the CPU 32 transmits a Deactivation command to the portable terminal 50 via the NFC I / F 22. Next, the CPU 32 receives a response command (that is, an OK command) for the Deactivation command from the portable terminal 50 via the NFC I / F 22. As a result, the communication link established in S114 is disconnected.

  For example, when the cutting method selected in S138 is the first hard cutting, in S140, the CPU 32 temporarily stops the operation of the NFC I / F 22 for 200 ms. Therefore, the CPU 32 cannot execute the confirmation command transmission process started in S116 via the NFC I / F 22. In this case, the portable terminal 50 determines that a time-out has occurred, ends the processing related to the communication link (that is, monitoring of reception of the confirmation command, etc.), and as a result, the communication link is disconnected.

  For example, when the cutting method selected in S138 is soft + hard cutting, in S140, the CPU 32 first transmits a Deactivation command to the portable terminal 50 via the NFC I / F 22. Next, the CPU 32 receives a response command (that is, an OK command) for the Deactivation command from the portable terminal 50 via the NFC I / F 22. Thereafter, the CPU 32 temporarily stops the operation of the NFC I / F 22 for 10 ms. As a result, the communication link established in S114 is disconnected. When S140 ends, the poll processing of the MFP ends.

  Although not shown in the cutting method table 42 in FIG. 2 and the flowchart in FIG. 6, the OS information of the mobile terminal 50 is different from “T1” and “T2” (for example, “T3” indicating iOS). If included, the CPU 32 may execute bidirectional communication of a plurality of target data using the same communication link without executing S138 and S140 (that is, without disconnecting the communication link). .

(Poll processing of MFP; R / W mode (FIG. 7))
Next, with reference to FIG. 7, the contents of the process when it is determined NO in S110 of FIG. 6 (that is, when it is determined that the MFP 10 should operate in the R / W mode) will be described. Note that S160 and S162 are executed according to the protocol stack 38. Further, S164, S168, S170, S172, S176, S178, S182, and S186 are executed according to the application program 36. S165, S166, S173, S174, S180, S184, and S188 are executed using the API of the protocol stack 38 in accordance with the application program 36.

  S160 to S164 are the same as S112, S114, and S118 of FIG. However, in S160, the CPU 32 transmits an activation command corresponding to the R / W mode.

  If NO in S164 (that is, if the transmission flag is “0”), in S165, the CPU 32 determines that the MFP 10 should operate according to the Reader mode. Thereby, the CPU 32 can read the target data from the pseudo card of the mobile terminal 50, that is, can receive the target data from the mobile terminal 50. Subsequent S166 to S172 are the same as S66 to S72 of FIG.

  On the other hand, if YES in S164 (that is, if the transmission flag is “1”), in S173, the CPU 32 determines that the MFP 10 should operate according to the writer mode. Thereby, the CPU 32 can write the target data to the pseudo card of the mobile terminal 50, that is, can transmit the target data to the mobile terminal 50. Subsequent S174 to S178 are the same as S74 to S78 in FIG.

  If S172 or S178 is passed, the process proceeds to S180. If YES in S170 or YES in S176, the process proceeds to S186. S186 is the same as S86 of FIG. When S186 ends, the process proceeds to S188.

  In S180 or S188, the CPU 32 first refers to the disconnection method table 42 and selects a disconnection method for disconnecting the communication link established in S162. At the time of S180 or S188, the current status of the MFP 10 is either “Poll continuation” or “Poll end”, and the mode of the MFP 10 is “R / W”. The CPU 32 selects the first soft disconnection regardless of the OS information of the portable terminal 50 (see FIG. 2). In S180 or S188, the CPU 32 uses the selected first soft disconnection to disconnect the communication link established in S162. The contents of the first soft cutting are as described above. When S180 ends, the poll processing of the MFP ends after S182 and S184 are executed. On the other hand, when S188 ends, S182 and S184 are not executed, and the poll processing of the MFP ends.

  In S182, the CPU 32 refers to the operation control table 44 in the memory 34 and the OS information of the mobile terminal 50, and selects one operation control method from among a plurality of types of operation control methods. In S <b> 182, the CPU 32 selects an operation control method according to the OS information of the portable terminal 50. For example, when S182 is executed via S166, in S182, the CPU 32 selects an operation control method using the OS information of the portable terminal 50 included in the target data received in S166. Further, for example, when S182 is executed via S174, in S182, the CPU 32 uses the OS information of the mobile terminal 50 included in the target data received last time from the mobile terminal 50 to perform an operation control method. Select. Specifically, when the OS information of the mobile terminal 50 includes “T1” and “V1”, the CPU 32 selects the first hardware control, and the OS information of the mobile terminal 50 indicates “T2” and “ In the case of including “V3”, the second hardware control is selected. When the OS information of the portable terminal 50 includes “T1” and “V2”, the CPU 32 skips the process of S184 without selecting any operation control method (see FIG. 3), and The Poll process is terminated.

  In S184, the CPU 32 executes an operation control process using the operation control method selected in S182. The first and second hardware controls are as described above. The reason for executing the operation control process of S184 is the same as the reason for executing the operation control process of S84 of FIG.

(Specific case)
Subsequently, a specific case realized by this embodiment will be described. The following cases are realized by the MFP 10 executing the processes shown in FIGS. 4 to 7. In each of the following cases, the first target data is transmitted from the portable terminal 50 to the MFP 10 as shown in the pattern B in the command table 40 of FIG. 1, and then the second target is transmitted from the MFP 10 to the portable terminal 50. It is assumed that the target data is transmitted and a series of communication of a plurality of target data ends.

(Case A; Fig. 8)
In case A, the MFP 10 executes the poll operation (that is, the portable terminal 50 executes the listen operation), and the portable terminal 50 can operate according to the P2P mode. The portable terminal 50 includes an OS program having type information “T1” and version information “V1”.

  The MFP 10 transmits an activation command to the portable terminal 50 (S112 in FIG. 6), and receives an OK command from the portable terminal 50 (S114). As a result, the communication link L1 is established between the MFP 10 and the portable terminal 50. In this case, the MFP 10 starts confirmation command transmission processing (S116). That is, the MFP 10 transmits a confirmation command to the portable terminal 50 and receives an OK command from the portable terminal 50.

  At the time when the communication link L1 is established, the transmission flag is “0”. In this case, the MFP 10 determines NO in S118, and then performs negotiation, and notifies the portable terminal 50 that the MFP 10 executes data reception (S120). The MFP 10 receives the first target data from the portable terminal 50 (S122). The first target data includes a command to be processed by the MFP 10 and OS information indicating “T1” and “V1”. The MFP 10 processes the command included in the first target data to generate second target data (S124). In this case, the MFP 10 sets the transmission flag to “1” and sets the continuation flag to “1” (S128).

  The current status of the MFP 10 is “Poll continuation”, the mode of the MFP 10 is “P2P”, and the OS information of the portable terminal 50 includes “T1” and “V1”. Accordingly, the MFP 10 selects the first hard disconnection (S138, see FIG. 2). Next, the MFP 10 stops the operation of the NFC I / F 22 for 200 ms in accordance with the selected first hard disconnection (S140). For this reason, the MFP 10 cannot transmit a confirmation command. As a result, the mobile terminal 50 determines that a timeout has occurred, and as a result, the communication link L1 is disconnected.

  Thereafter, the MFP 10 executes the poll operation again (that is, the portable terminal 50 executes the listen operation again). The MFP 10 transmits an activation command to the portable terminal 50 (S112), and receives an OK command from the portable terminal 50 (S114). As a result, a communication link L2 is established between the MFP 10 and the portable terminal 50.

  The transmission flag is set to “1” when the first target data is communicated. Therefore, the MFP 10 determines YES in S118, and then executes negotiation to notify the portable terminal 50 that the MFP 10 executes data transmission (S130). The MFP 10 transmits the second target data to the portable terminal 50 (S132). In this case, the MFP 10 sets the transmission flag to “0” and sets the continuation flag to “0” (S137).

  The current status of the MFP 10 is “Poll end”, and the mode of the MFP 10 is “P2P”. Therefore, the MFP 10 selects the first soft disconnection (S138, see FIG. 2). Next, in accordance with the selected first soft disconnection, the MFP 10 transmits a Deactivation command to the portable terminal 50 and receives an OK command from the portable terminal 50 (S140). As a result, the communication link L2 is disconnected.

  As described above, the P2P mode is a mode for bidirectional communication. Therefore, the structure which communicates both the 1st and 2nd object data using the same communication link L1 can be considered. However, there is a possibility that the mobile terminal 50 cannot properly execute bidirectional communication according to the P2P mode. For example, when the OS program of the portable terminal 50 has the type information “T1” and the version information “V1”, the OS program uses the communication link L1 to transmit the first target data, The operation of receiving the second target data using the same communication link L1 is not permitted.

  In view of such a situation, in case A, when the MFP 10 receives the first target data from the portable terminal 50 using the communication link L1, the MFP 10 temporarily disconnects the communication link L1. Next, the MFP 10 re-establishes the communication link L2, and transmits the second target data to the portable terminal 50 using the communication link L2. Therefore, even when the portable terminal 50 does not allow the two-way communication in the P2P mode, the MFP 10 can appropriately communicate both the first target data and the second target data with the portable terminal 50 according to the P2P mode. it can.

  A typical poll device normally disconnects the communication link by using the first soft disconnection defined by the NFC forum. However, as described above, in case A, the MFP 10 disconnects the communication link L1 using the first hard disconnection instead of the first soft disconnection. The reason is as follows. That is, in case A, the OS program of the portable terminal 50 has type information “T1” and version information “V1”. In the mobile terminal 50 having such OS information “T1-V1”, if the communication link L1 is disconnected by the first soft disconnection, a fatal error occurs at the P2P protocol stack level of the mobile terminal 50. Can occur. When the error occurs, the mobile terminal 50 recognizes that the second target data is the response data of the first target data even if the second target data is received using the communication link L2. Can not do it. As a result, the portable terminal 50 cannot appropriately execute the process according to the command included in the second target data (for example, “instruction command” in the first example).

  In view of such circumstances, in the present embodiment, as shown in FIG. 2, as a cutting method corresponding to “Poll continuation”, “P2P”, and “T1-V1”, “first hard cutting” Is adopted. Note that the first hard disconnection waiting period (that is, 200 ms) is set to a period during which the portable terminal 50 can detect a timeout. Even if the communication link L1 is disconnected by the first hard disconnection, no error occurs in the portable terminal 50. For this reason, when the mobile terminal 50 receives the second target data using the communication link L2, the mobile terminal 50 can appropriately execute the process according to the command included in the second target data.

  On the other hand, as shown in FIG. 2, the general “first soft disconnection” defined by the NFC Forum is adopted as a disconnection method corresponding to “Poll end” and “P2P”. As described above, when the first soft disconnection is used, an error may occur in the portable terminal 50. When the status of the MFP 10 is “Poll end”, a series of communication of a plurality of target data is performed. Therefore, there is no problem even if an error occurs in the portable terminal 50. Moreover, the first soft disconnection is a disconnection method that can disconnect the communication link more quickly than the first hard disconnection. The first soft disconnection does not require a waiting period of 200 ms unlike the first hard disconnection, and further, the return period from the disconnection of the hardware (that is, NFC I / F 22) to the return unlike the first hard disconnection. Because there is no need. For this reason, the MFP 10 can quickly disconnect the communication link L2 and quickly execute other processing (for example, a poll operation or a listen operation).

(Case B; Fig. 9)
In case B, the MFP 10 performs a poll operation (that is, the portable terminal 50 executes a listen operation), and the portable terminal 50 can operate according to the P2P mode. The portable terminal 50 includes an OS program having type information “T1” and version information “V2”. As in the case A, the portable terminal 50 including the OS program having “T1” and “V2” cannot appropriately execute bidirectional communication according to the P2P mode. Accordingly, even in case B, the MFP 10 disconnects the communication link L1 and reestablishes the communication link L2.

  In Case B, the MFP 10 disconnects the communication link L1 using the first soft disconnection. Only this point is different from Case A. In Case B, the OS program of the portable terminal 50 has type information “T1” and version information “V2”. In the mobile terminal 50 having such OS information “T1-V2”, no error occurs even if the communication link L1 is disconnected by the first soft disconnection.

  In view of such circumstances, in this embodiment, as shown in FIG. 2, the communication link can be quickly disconnected as a disconnection method corresponding to “Poll continuation”, “P2P”, and “T1-V2”. The “first soft cutting” is adopted. Therefore, the MFP 10 can quickly disconnect the communication link L1 and quickly establish the communication link L2.

(Case C; FIG. 10)
In case C, the MFP 10 performs a poll operation (that is, the portable terminal 50 executes a listen operation), and the portable terminal 50 can operate according to the P2P mode. The portable terminal 50 includes an OS program having type information “T2” and version information “V3”. As in the case A, the portable terminal 50 including the OS program having “T2” and “V3” cannot appropriately execute bidirectional communication according to the P2P mode. Accordingly, even in case C, the MFP 10 disconnects the communication link L1 and reestablishes the communication link L2.

  In Case C, the MFP 10 disconnects the communication link L1 using soft + hard disconnect. Only this point is different from Case A. In Case C, the OS program of the portable terminal 50 has type information “T2” and version information “V3”. Even if only the first soft disconnection is executed, the mobile terminal 50 having such OS information “T2-V3” cannot appropriately recognize the disconnection of the communication link L1. If the portable terminal 50 cannot recognize the disconnection of the communication link L1, the communication link L2 cannot be properly established between the MFP 10 and the portable terminal 50.

  In view of such circumstances, in this embodiment, as shown in FIG. 2, “soft + hard cutting” is a cutting method corresponding to “Poll continuation”, “P2P”, and “T2-V3”. It has been adopted. The soft + hard disconnection is a method of stopping the operation of the NFC I / F 22 for 10 ms after the Deactivation command and the OK command communication are executed, as in the first soft disconnection. When the operation of the NFC I / F 22 is stopped, the portable terminal 50 cannot execute NFC communication (for example, polling signal and response signal communication) with the MFP 10 during the stop period. As a result, the mobile terminal 50 can appropriately recognize the disconnection of the communication link L1. For this reason, the communication link L <b> 2 can be appropriately established between the MFP 10 and the portable terminal 50.

(Case D; FIG. 11)
In Case D, the MFP 10 executes the Listen operation (that is, the portable terminal 50 executes the Poll operation), and the portable terminal 50 can operate according to the P2P mode. The portable terminal 50 includes an OS program having type information “T1” and version information “V1”, or an OS program having type information “T1” and version information “V2”.

  The MFP 10 receives the activation command from the portable terminal 50 (S10 in FIG. 4), and transmits an OK command to the portable terminal 50 (S14). As a result, the communication link L1 is established between the MFP 10 and the portable terminal 50. In this case, the MFP 10 starts a confirmation command response process (S16). That is, the MFP 10 receives the confirmation command from the mobile terminal 50 and transmits an OK command to the mobile terminal 50.

  At the time when the communication link L1 is established, the transmission flag is “0”. Therefore, the MFP 10 determines NO in S18, and then executes negotiation to notify the portable terminal 50 that the MFP 10 executes data reception (S20). The MFP 10 receives the first target data from the portable terminal 50 (S22). The first target data includes a command to be processed by the MFP 10 and OS information indicating “T1” and “V1” (or OS information indicating “T1” and “V2”). The MFP 10 processes the command included in the first target data to generate second target data (S24). In this case, the MFP 10 sets the transmission flag to “1” and sets the continuation flag to “1” (S28).

  The current status of the MFP 10 is “Listen Continue”, and the mode of the MFP 10 is “P2P”. For example, when the OS information of the portable terminal 50 includes “T1” and “V1”, the MFP 10 selects the first hard disconnection (S38, see FIG. 2). For example, when the OS information of the portable terminal 50 includes “T1” and “V2”, the MFP 10 selects the second hard disconnection (S38, see FIG. 2). Next, the MFP 10 stops the operation of the NFC I / F 22 for 200 ms or 300 ms in accordance with the selected first hard disconnection or second hard disconnection (S40). For this reason, even if the MFP 10 receives a confirmation command from the portable terminal 50, the MFP 10 does not transmit an OK command. Further, even when the MFP 10 receives the Deactivation command from the portable terminal 50, the MFP 10 does not transmit the OK command. As a result, the mobile terminal 50 determines that a timeout has occurred, and as a result, the communication link L1 is disconnected.

  Thereafter, the MFP 10 executes the Listen operation again (that is, the portable terminal 50 executes the Polling operation again). The MFP 10 receives the activation command from the portable terminal 50 (S10), and transmits an OK command to the portable terminal 50 (S14). As a result, a communication link L2 is established between the MFP 10 and the portable terminal 50.

  The transmission flag is set to “1” when the first target data is communicated. Accordingly, the MFP 10 determines YES in S18, and then executes negotiation to notify the portable terminal 50 that the MFP 10 executes data transmission (S30). The MFP 10 transmits the second target data to the portable terminal 50 (S32). In this case, the MFP 10 sets the transmission flag to “0” and sets the continuation flag to “0” (S37).

  The current status of the MFP 10 is “Listen end”, and the mode of the MFP 10 is “P2P”. Accordingly, the MFP 10 selects the second soft disconnection (S38, see FIG. 2). Next, the MFP 10 receives a Deactivation command from the portable terminal 50 according to the selected second soft disconnection, and transmits an OK command to the portable terminal 50 (S40). As a result, the communication link L2 is disconnected.

  A typical Listen device normally disconnects the communication link using a second soft disconnection established by the NFC Forum. However, as described above, in Case D, the MFP 10 disconnects the communication link L2 by using the first hard disconnection or the second hard disconnection instead of the second soft disconnection. The reason is as follows. That is, in case D, the OS program of the portable terminal 50 has type information “T1” and version information “V1”, or type information “T1” and version information “V2”. In the portable terminal 50 having such OS information “T1-V1” or “T1-V2”, if the communication link L1 is disconnected by the second soft disconnection, an error may occur. As described in case A, when the error occurs, the mobile terminal 50 cannot appropriately execute the process according to the command included in the second target data.

  In view of such a situation, in this embodiment, as shown in FIG. 2, as a cutting method corresponding to “Listen continuation”, “P2P”, and “T1-V1”, “first hard cutting” Is adopted. Further, as shown in FIG. 2, “second hard cutting” is adopted as a cutting method corresponding to “Listen continuation”, “P2P”, and “T1-V2”. The waiting periods for the first and second hard disconnections (that is, 200 ms and 300 ms) are set to periods during which the portable terminal 50 can detect a timeout. The period in which the portable terminal 50 having the OS information “T1-V2” can detect the timeout is longer than the period in which the portable terminal 50 having the OS information “T1-V1” can detect the timeout. Even if the communication link L1 is disconnected by the first hard disconnection or the second hard disconnection, no error occurs in the portable terminal 50. For this reason, when the mobile terminal 50 receives the second target data using the communication link L2, the mobile terminal 50 can appropriately execute the process according to the command included in the second target data.

  On the other hand, as shown in FIG. 2, “second soft disconnection” capable of quickly disconnecting the communication link is adopted as a disconnection method corresponding to “Listen end” and “P2P”. For this reason, the MFP 10 can quickly disconnect the communication link L2 and quickly execute other processing (for example, a poll operation or a listen operation).

  Although not related to the sequence diagrams of FIGS. 8 to 11, the portable terminal 50 having the OS information “T2-V3” appropriately disconnects the communication link L1 if the second soft disconnection is executed. Can not be recognized. Therefore, as shown in FIG. 2, “second hard cutting” is employed as a cutting method corresponding to “Listen continuation”, “P2P”, and “T2-V3”. When the second hard disconnection is executed, the mobile terminal 50 having the OS information “T2-V3” can appropriately recognize the disconnection of the communication link L1. For this reason, the communication link L <b> 2 can be appropriately established between the MFP 10 and the portable terminal 50.

(Case E; FIG. 12)
In Case E, the MFP 10 performs the Listen operation (that is, the portable terminal 50 performs the Poll operation), and the portable terminal 50 is not operable according to the P2P mode (that is, only according to the R / W mode and the CE mode). Is operational). Accordingly, the MFP 10 operates according to the CE mode, and the portable terminal 50 operates according to the R / W mode. The portable terminal 50 includes an OS program having type information “T1” and version information “V1”, or an OS program having type information “T1” and version information “V2”.

  The MFP 10 receives the activation command from the portable terminal 50 (S10 in FIG. 4), and transmits an OK command to the portable terminal 50 (S62 in FIG. 5). As a result, the communication link L1 is established between the MFP 10 and the portable terminal 50.

  At the time when the communication link L1 is established, the transmission flag is “0”. In this case, the MFP 10 determines NO in S64 and receives the first target data from the portable terminal 50 (S66). The first target data includes a command to be processed by the MFP 10 and OS information indicating “T1” and “V1” (or OS information indicating “T1” and “V2”). The MFP 10 processes the command included in the first target data to generate second target data (S68). In this case, the MFP 10 sets the transmission flag to “1” and sets the continuation flag to “1” (S72).

  The current status of the MFP 10 is “Listen Continue”, and the mode of the MFP 10 is “CE”. Therefore, the MFP 10 selects the second soft disconnection regardless of the OS information of the portable terminal 50 (S80, see FIG. 2). Next, in accordance with the selected second soft disconnection, the MFP 10 receives a Deactivation command from the portable terminal 50 and transmits an OK command to the portable terminal 50 (S80). As a result, the communication link L1 is disconnected.

  Next, the MFP 10 selects an operation control method (S82). For example, when the OS information of the portable terminal 50 includes “T1” and “V1”, the MFP 10 selects the first hardware control (S82, see FIG. 3). For example, when the OS information of the portable terminal 50 includes “T1” and “V2”, the MFP 10 selects the second hardware control (S82, see FIG. 3). Next, the MFP 10 stops the operation of the NFC I / F 22 for 200 ms or 300 ms in accordance with the selected first hardware control or second hardware control (S84). That is, even if the MFP 10 receives a polling signal from the portable terminal 50, the MFP 10 does not transmit a response signal (that is, the NFC I / F 22 temporarily does not execute the Listen operation). Further, the MFP 10 does not transmit a polling signal to the portable terminal 50 (that is, the NFC I / F 22 does not temporarily execute the poll operation). Thereby, the portable terminal 50 detects the separation of the MFP 10. As a result, even if the MFP 10 and the portable terminal 50 are kept close to each other, a communication link L2 described later can be appropriately established.

  Thereafter, the MFP 10 executes the Listen operation again (that is, the portable terminal 50 executes the Polling operation again). The MFP 10 receives the activation command from the portable terminal 50 (S10 in FIG. 4), and transmits an OK command to the portable terminal 50 (S62 in FIG. 5). As a result, a communication link L2 is established between the MFP 10 and the portable terminal 50.

  The transmission flag is set to “1” when the first target data is communicated. Accordingly, the MFP 10 determines YES in S64 of FIG. 5 and transmits the second target data to the portable terminal 50 (S74). In this case, the MFP 10 sets the transmission flag to “0” and sets the continuation flag to “0” (S86).

  The current status of the MFP 10 is “Listen end”, and the mode of the MFP 10 is “CE”. Therefore, the MFP 10 selects the second soft disconnection regardless of the OS information of the portable terminal 50 (S88, see FIG. 2). Next, the MFP 10 receives the Deactivation command from the portable terminal 50 according to the selected second soft disconnection, and transmits an OK command to the portable terminal 50 (S88). As a result, the communication link L2 is disconnected.

  As described above, the R / W mode and the CE mode are modes for unidirectional communication. Therefore, it is impossible to communicate both the first and second target data using the same communication link L1. In the present embodiment, as shown in Case E, when the MFP 10 receives the first target data from the mobile terminal 50 using the communication link L1, the MFP 10 disconnects the communication link L1. Next, the MFP 10 re-establishes the communication link L2, and transmits the second target data to the portable terminal 50 using the communication link L2. Therefore, even when the MFP 10 and the portable terminal 50 operate according to the R / W mode and the CE mode, the MFP 10 can appropriately communicate both the first target data and the second target data with the portable terminal 50. . That is, the MFP 10 can realize pseudo two-way communication.

  In this embodiment, as shown in FIG. 2, “second soft disconnection” that can quickly disconnect the communication link is adopted as a disconnection method corresponding to “CE” regardless of the OS information of the mobile terminal 50. Has been. Therefore, the MFP 10 can quickly disconnect the communication link and quickly execute other processing.

  Further, as shown in FIG. 3, “first hardware control” is adopted as an operation control method corresponding to “Listen continuation”, “CE”, and “T1-V1”. Further, as shown in FIG. 3, “second hardware control” is adopted as an operation control method corresponding to “Listen continuation”, “CE”, and “T1-V2”. The first and second hardware control standby periods (that is, 200 ms and 300 ms) are set to periods during which the portable terminal 50 can detect the separation of the communication partner. The period in which the portable terminal 50 having the OS information “T1-V2” can detect the separation of the communication partner is longer than the period in which the portable terminal 50 having the OS information “T1-V1” can detect the separation of the communication partner. As described above, since the first or second hardware control according to the OS information of the portable terminal 50 is executed, the MFP 10 can appropriately cause the portable terminal 50 to detect the separation of the communication partner.

  Although not related to the sequence diagram of FIG. 12, as shown in FIG. 3, as the operation control method corresponding to “Listen continuation”, “CE”, and “T2-V3”, “second hardware control” Is adopted. When the second hardware control is executed, the portable terminal 50 having the OS information “T2-V3” can detect the separation of the communication partner. The MFP 10 can cause the portable terminal 50 to appropriately detect the separation of the communication partner.

  Further, as shown in FIG. 3, the operation control method corresponding to “Listen end” and “CE” is not described. This means that the operation control process is not executed. Since a series of communication of a plurality of target data has been completed, the user of the mobile terminal 50 moves the mobile terminal 50 away from the MFP 10. For this reason, even if the operation control process is not executed, the mobile terminal 50 can detect the separation of the communication partner. Therefore, the MFP 10 does not execute the operation control process. As a result, the MFP 10 can quickly execute other processes.

(Other cases)
Although the sequence diagram is omitted, as shown in FIG. 2, “first soft cutting” is adopted as a cutting method corresponding to “Poll continuation” and “R / W”. Further, “first soft cutting” is adopted as a cutting method corresponding to “Poll end” and “R / W”. Therefore, the MFP 10 can quickly disconnect the communication link and quickly execute other processing.

  Further, as shown in FIG. 3, “first hardware control” is adopted as an operation control method corresponding to “Poll continuation”, “T1-V1”, and “R / W”. Further, “second hardware control” is adopted as an operation control method corresponding to “Poll continuation”, “T2-V3”, and “R / W”. As described above, since the first or second hardware control according to the OS information of the portable terminal 50 is executed, the MFP 10 can appropriately cause the portable terminal 50 to detect the separation of the communication partner. In FIG. 3, the operation control method corresponding to “Poll continuation”, “T1-V2”, and “R / W” is not described. When the communication link is disconnected, the portable terminal 50 having the OS information “T1-V2” can appropriately detect the separation of the communication partner even if the operation control process is not executed. Therefore, the MFP 10 does not execute the operation control process. As a result, the MFP 10 can quickly execute other processes.

  Further, as shown in FIG. 3, the operation control method corresponding to “Poll end” and “R / W” is not described. Since a series of communication of a plurality of target data has been completed, the user of the mobile terminal 50 moves the mobile terminal 50 away from the MFP 10. For this reason, even if the operation control process is not executed, the mobile terminal 50 can detect the separation of the communication partner. Therefore, the MFP 10 does not execute the operation control process. As a result, the MFP 10 can quickly execute other processes.

(Correspondence)
The MFP 10 and the portable terminal 50 are examples of “communication device” and “external device”, respectively. The Activation command is an example of “first establishment command” and “second establishment command”. The Deactivation command is an example of a “disconnect command”. The communication link L1 and the communication link L2 are examples of the “first communication link” and the “second communication link”, respectively. The OS information is an example of “relation information”. The command table 40 in FIG. 1 is an example of “communication continuation information”.

  The OS information “T1-V1”, the OS information “T1-V2”, and the OS information “T2-V3” are respectively “first relation information”, “second relation information”, and “third relation”. It is an example of “information”. First hard cutting selected in case A in FIG. 8, first soft cutting selected in case B in FIG. 9, soft + hard cutting selected in case C in FIG. 10, in case D in FIG. The second hard cutting selected and the second soft cutting selected in case E of FIG. 12 are respectively “first type cutting method”, “second type cutting method”, “third type cutting method”. This is an example of “cutting method”, “fourth type cutting method”, and “fifth type cutting method”. “First soft control” or “second soft control” corresponding to “Po11 end” or “Listen end” in FIG. 2 is an example of a “predetermined type of cutting method”. Further, 200 ms for the first hard disconnection (or first hard control) and 300 ms for the second hard disconnection (or second hard control) are respectively “first period” and “second period”. It is an example.

  S10 and S14 in FIG. 4, S62 in FIG. 5, S112 and S114 in FIG. 6, and S160 and S162 in FIG. 7 are “first establishment step (further first establishment means)” and “second establishment step ( Furthermore, it is an example of “second establishing means”. S22 in FIG. 4, S66 in FIG. 5, S122 in FIG. 6, and S166 in FIG. 7 are examples of the “reception step (reception means)”. S24 in FIG. 4, S68 in FIG. 5, S124 in FIG. 6, and S168 in FIG. 7 are examples of “generating step (further generating means)”. S38 in FIG. 4, S80 and S88 in FIG. 5, S138 in FIG. 6, and S180 and S188 in FIG. 7 are examples of “selection step (further selection means)”. S40 in FIG. 4, S80 and S88 in FIG. 5, S140 in FIG. 6, and S180 and S188 in FIG. 7 are examples of “cutting step (further cutting means)”. S32 in FIG. 4, S74 in FIG. 5, S132 in FIG. 6, and S174 in FIG. 7 are examples of “transmission step (further transmission means)”. S82 and S84 in FIG. 5 and S182 and S184 in FIG. 7 are examples of the “operation control step”. Further, S26 and S34 in FIG. 4, S70 and S76 in FIG. 5, S126 and S134 in FIG. 6, and S170 and S176 in FIG.

  Specific examples of the present invention have been described in detail above, but 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. The modifications of the above embodiment are listed below.

(Modification 1) The “communication device” is not limited to a multi-function device (that is, the MFP 10) that can execute a print function and a scan function, and is a printer that can execute only the print function of the print function and the scan function. Alternatively, it may be a scanner that can execute only the scan function of the print function and the scan function. The “communication device” is a device (for example, a PC, a server, a mobile terminal (a mobile phone, a smartphone, a PDA) that executes a function (for example, an image display function, a data calculation function) different from the print function and the scan function. Etc.)). That is, the “communication apparatus” includes any device that can execute NFC communication.

(Modification 2) “Relational information” is not limited to OS information, and may be any information as long as it is related information related to a communication program for an external device to perform NFC communication. For example, the “related information” may be specific information (for example, the identification number of the protocol stack, the name of the company that provides the protocol stack, etc.) that identifies the protocol stack mounted on the portable terminal 50. For example, the “relation information” may be the vendor name of the mobile terminal 50. In this modification, in the tables 42 and 44 in FIGS. 2 and 3, the above-described specific information column and the above-described vendor name column are provided instead of the OS information column.

(Modification 3) The “plural types of cutting methods” are not limited to the five types of cutting methods described in FIG. 2, and may include other cutting methods according to the OS information of the mobile terminal 50. For example, the “plurality of cutting methods” may include a third hard cutting that temporarily stops the operation of the NFC I / F 22 for a period (for example, 400 ms) different from 200 ms or 300 ms. . In the present modification, the first hard cutting and the third hard cutting are examples of the “first type cutting method” and the “second type cutting method”, respectively. Generally speaking, the first and second cutting methods may be different cutting methods. Similarly, the first and third cutting methods (or the first and fourth cutting methods) may be different cutting methods. Note that the second type, the third type, and the fourth type of cutting method may be different cutting methods or the same cutting method.

(Modification 4) In each of the above embodiments, each process of FIGS. 4 to 7 is realized by software (that is, programs 36 and 38). At least one of the processes of FIGS. It may be realized by hardware such as a circuit.

  The technical elements described in this specification or 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 technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

  2: Communication system, 10: Multi-function device (MFP), 30: Control unit, 32: CPU, 34: Memory, 40: Command table, 42: Cutting method table, 44: Operation control table, 50: Mobile terminal, L1 , L2: Communication link

Claims (14)

A communication device that performs communication of target data to be communicated with an external device in the NFC method, which is a communication method in accordance with the NFC (Near Field Communication) standard,
An NFC interface for executing the NFC communication;
A processor;
And a memory storing a program,
The processor performs the following steps according to the program stored in the memory:
A first establishment command for establishing a first communication link between the communication device and the external device is communicated with the external device via the NFC interface, and the first communication link is established. A first establishing step to establish;
By using the first communication link, and receiving steps via the NFC interface, it receives the first target data from the external device,
After the receiving step is performed, a first cutting step of cutting the pre-Symbol first communication link, after the first communication link is disconnected, the operation to temporarily stop the operation of the NFC interface A first NFC control step comprising: a control step;
After the first NFC control step is executed, a second establishment command for establishing a second communication link between the communication device and the external device is sent via the NFC interface to the external device. A second establishing step of communicating with a device to establish the second communication link;
Transmitting the second target data to the external device via the NFC interface using the second communication link;
A second NFC control step including a second disconnection step of disconnecting the second communication link after the transmission step is performed, and not including the operation control step;
A communication device for executing. Even if the first establishment step is executed, the processor does not execute the first NFC control step and the second establishment step through the NFC interface, unless the first NFC control step and the second establishment step are executed. The communication device according to claim 1 , wherein data is not transmitted to the external device. The operation control step transmits a stop instruction for stopping the operation of the NFC interface to the NFC interface after the first communication link is disconnected, and the operation of the NFC interface is performed after a predetermined period has elapsed. The communication apparatus according to claim 1 , wherein the operation of the NFC interface is temporarily stopped by transmitting a restart instruction for restarting the NFC interface to the NFC interface . The operation control step temporarily stops the operation of the NFC interface by stopping power supply to the NFC interface for a predetermined period after the first communication link is disconnected. The communication apparatus according to 1 or 2 . The processor is
In the state where the communication device operates in accordance with the Reader mode of the NFC standard and the external device operates in accordance with the Card Emulsion mode of the NFC standard, the reception step is executed.
Together with the communication device operates in accordance P2P mode of the NFC standard, in a state in which the external device is operated in accordance P2P mode of the NFC standard, executing the transmitting step, according to any one of claims 1 4 Communication equipment. The first target data includes related information related to a communication program for the external device to execute the NFC communication.
The operation control step includes
In a case where the first target data includes first type information indicating the type of the first communication program, the operation of the NFC interface is performed in the first period after the first communication link is disconnected. Temporarily stopped,
When the first target data includes second type information indicating a type of a second communication program different from the first communication program, the NFC is disconnected after the first communication link is disconnected. The communication device according to claim 5, wherein the operation of the interface is temporarily stopped over a second period different from the first period . The first target data includes related information related to a communication program for the external device to execute the NFC communication.
In the operation control step, the first target data includes first type information indicating a type of a first communication program, first version information indicating a first version of the first communication program, The NFC interface is temporarily stopped after the first communication link is disconnected,
In the processor, the first target data includes a first version information indicating a type of the first communication program and a second version different from the first version of the first communication program. 7. The communication device according to claim 5 , wherein when the first communication link is included, the operation of the NFC interface is not temporarily stopped after the first communication link is disconnected . A computer program for a communication device that performs communication of target data to be communicated with an external device in the NFC method, which is a communication method according to the NFC (Near Field Communication) standard,
The computer program causes the processor of the communication device to perform the following steps:
A first establishment command for establishing a first communication link between the communication device and the external device is communicated with the external device via the NFC interface, and the first communication link is established. A first establishing step to establish;
By using the first communication link, and receiving steps via the NFC interface, it receives the first target data from the external device,
After the receiving step is performed, a first cutting step of cutting the pre-Symbol first communication link, after the first communication link is disconnected, the operation to temporarily stop the operation of the NFC interface A first NFC control step comprising: a control step;
After the first NFC control step is executed, a second establishment command for establishing a second communication link between the communication device and the external device is sent via the NFC interface to the external device. A second establishing step of communicating with a device to establish the second communication link;
Transmitting the second target data to the external device via the NFC interface using the second communication link;
A second NFC control step including a second disconnection step of disconnecting the second communication link after the transmission step is performed, and not including the operation control step;
A computer program that executes. A communication device that performs communication of target data to be communicated with an external device in the NFC method, which is a communication method in accordance with the NFC (Near Field Communication) standard,
An NFC interface for executing the NFC communication;
A processor;
And a memory storing a program,
The processor performs the following steps according to the program stored in the memory:
A step of storing specific information in the memory, wherein the specific information is transmitted as second target data to the external device in response to receiving the first target data from the external device; The storage step, which is information for determining whether or not
Through the pre-Symbol NFC interface, the first establishing step of establishing a first communication link with the external device,
Receiving the first target data from the external device via the NFC interface using the first communication link;
Judging whether or not the second target data should be transmitted to the external device based on the specific information in response to receiving the first target data from the external device Steps,
A first disconnecting step of disconnecting the first communication link using a first type disconnection method when it is determined that the second target data is to be transmitted to the external device ;
After the using the first type of cutting technique first communication link is disconnected, via the NFC interface, a second establishing step of establishing a second communication link with the external device,
Transmitting the second target data to the external device via the NFC interface using the second communication link;
When it is determined that the second target data should not be transmitted to the external device, the first communication link is made using a second type of disconnection method different from the first type of disconnection method. A second cutting step of cutting
A communication device for executing . The first disconnecting step disconnects the first communication link by using one first type disconnection method among a plurality of first type disconnection methods,
The communication device according to claim 9, wherein the second disconnecting step disconnects the first communication link by using the second type of disconnection method which is a predetermined one disconnection method. . The first target data includes related information related to a communication program for the external device to execute the NFC communication.
The processor further includes:
A selection step of selecting the one first type cutting method from the plurality of first type cutting methods when it is determined that the second target data should be transmitted to the external device. Run
The first disconnecting step disconnects the first communication link using the selected one first type disconnection method,
The selection step includes
When the first target data includes first type information indicating the type of the first communication program, the first method of the plurality of first type cutting methods is changed to the one first type. Select as one cutting method,
In the case where the first target data includes second type information indicating a type of a second communication program different from the first communication program, the cutting method among the plurality of first type cutting methods. The communication apparatus according to claim 10 , wherein a second method different from the first method is selected as the one first-type cutting method . The first target data includes related information related to a communication program for the external device to execute the NFC communication.
The processor further includes:
A selection step of selecting the one first type cutting method from the plurality of first type cutting methods when it is determined that the second target data should be transmitted to the external device. Run
The first disconnecting step disconnects the first communication link using the selected one first type disconnection method,
The selection step includes
When the first target data includes first type information indicating a type of the first communication program and first version information indicating a first version of the first communication program, Selecting a third method of the plurality of first-type cutting methods as the one first-type cutting method;
When the first target data includes the first type information and second version information indicating a second version different from the first version of the first communication program, The communication apparatus according to claim 10 or 11, wherein a fourth method different from the third method among a plurality of first type cutting methods is selected as the one first type cutting method. The processor is
The communication device operates in accordance with the NFC standard P2P mode and the external device operates in accordance with the NFC standard P2P mode.
13. The transmission step according to claim 9, wherein the transmission step is executed in a state where the communication device operates in accordance with the P2P mode of the NFC standard and the external device operates in accordance with the P2P mode of the NFC standard. Communication equipment. A computer program for a communication device that performs communication of target data to be communicated with an external device in the NFC method, which is a communication method according to the NFC (Near Field Communication) standard,
The computer program causes the processor of the communication device to perform the following steps:
A step of storing specific information in a memory, wherein the specific information is a second target data to be transmitted to the external device in response to receiving the first target data from the external device; The storage step, which is information for determining whether or not
A first establishing step of establishing a first communication link with the previous Kigaibu device,
By using the first communication link, and receiving steps of the first object data received from said external device,
Judging whether or not the second target data should be transmitted to the external device based on the specific information in response to receiving the first target data from the external device Steps,
A first disconnecting step of disconnecting the first communication link using a first type disconnection method when it is determined that the second target data is to be transmitted to the external device ;
For establishing a second communication link according to the NFC scheme between the communication device and the external device after the first communication link is disconnected using the first type disconnection method a second establishing command, the second establishing step of establishing a second communication link with the external device,
Transmitting the second target data to the external device using the second communication link;
When it is determined that the second target data should not be transmitted to the external device, the first communication link is made using a second type of disconnection method different from the first type of disconnection method. A second cutting step of cutting
A computer program that executes