JP2016012200A - Image forming apparatus and communication method therefor, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming apparatus that can easily perform radio communication with a portable terminal carried by a user in the vicinity of the image forming apparatus.SOLUTION: When an image forming apparatus 100 detects a user in the vicinity of the image forming apparatus 100 with a human sensor 160, creates an ID for establishing radio connection with a portable terminal 300 carried by the user and displays the created ID on an operation part 150. The image forming apparatus 100 performs authentication on the basis of an ID received from the portable terminal 300 of the user via a radio LAN controller 116, receives a job from the successfully authenticated portable terminal 300, and executes the job.

Description

  The present invention relates to an image forming apparatus, a communication method thereof, and a program, and more particularly, to a wireless communication technique of an image forming apparatus with an information processing apparatus.

  In recent years, due to the evolution of wireless LAN communication technology, not only mobile terminals such as smartphones and tablet PCs, but many devices such as cameras, game machines, and copiers have a wireless communication function. For example, a copying machine equipped with wireless communication means can receive and print images taken with a smartphone or camera via a wireless LAN.

  When establishing wireless communication between apparatuses, for example, it is necessary to input the SSID and encryption key of the wireless LAN of the connection destination on the wireless LAN setting screen of the portable terminal. In addition, an image pattern obtained by converting connection information such as an SSID or an encryption key is displayed on the display of the high-definition receiver, and the displayed image pattern is photographed with a camera having a communication function and re-converted into connection information. There exists a method (for example, refer patent document 1).

JP 2008-211507 A

  For example, when data stored in a portable terminal is wirelessly transmitted to an image forming apparatus installed in an office or a convenience store for printing, the user is not specified, so wireless communication between apparatuses is continuously established. There is no need to establish communication temporarily when necessary.

  The present invention has been made in view of the above problems, and provides a technique that allows a user near the image forming apparatus to easily perform wireless communication with a portable terminal possessed by the user. To do.

  In order to achieve the above object, an image forming apparatus according to the present invention includes a human detection unit that detects a user in the vicinity of the image forming apparatus, and a human detection unit that includes a wireless communication unit. When the user is detected by the above, a generating unit that generates an ID for establishing a wireless connection with the mobile terminal possessed by the user, a display unit that displays the ID generated by the generating unit, An authentication unit that performs authentication based on an ID received from the portable terminal via the wireless communication unit, and a job execution unit that receives and executes a job from the portable terminal that has been successfully authenticated by the authentication unit. And

  According to the present invention, when data is transmitted by wireless communication of a portable terminal and printing is performed from the image forming apparatus, a user in the vicinity of the image forming apparatus easily establishes wireless communication between the portable terminal and the image forming apparatus. be able to.

1 is a diagram illustrating an example of a communication environment in which an image forming apparatus according to a first embodiment of the present invention is installed. FIG. 2 is a block diagram illustrating an example of a hardware configuration of the image forming apparatus in FIG. 1. It is a block diagram which shows the hardware constitutions and connection relationship of the power supply part in FIG. It is a block diagram which shows the hardware constitutions of the portable terminal in FIG. 6 is a flowchart illustrating print job execution processing of the image forming apparatus according to the first exemplary embodiment of the present invention. FIG. 6 is a sequence diagram illustrating data exchange between the image forming apparatus and the mobile terminal. 4A and 4B are diagrams illustrating an example of a screen displayed on an operation unit of the image forming apparatus, which is (a) a wireless LAN connection setting screen and (b) a main menu screen. FIG. 10 is a diagram illustrating an example of a screen displayed on an operation unit of the image forming apparatus according to the second embodiment, which is another example of (a) a wireless LAN connection setting screen and (b) a wireless LAN connection setting screen. 12 is a flowchart illustrating print job execution processing of an image forming apparatus according to a third embodiment of the present invention.

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

[First Embodiment]
FIG. 1 is a diagram illustrating an example of a communication environment in which an image forming apparatus according to a first embodiment of the present invention is installed.

  In FIG. 1, an image forming apparatus 100 is a multifunction device having a plurality of functions such as a copy function, a print function, and a communication function. The image forming apparatus 100 can be connected to a wireless LAN access point (wireless LAN_AP) 500 via the wireless LAN 200 by a communication function.

  The mobile terminal 300 is a smartphone, a tablet PC, or the like, and can be connected to the wireless LAN_AP 500 via the wireless LAN 200. As a result, the portable terminal 300 can transmit image data to the image forming apparatus 100 via the wireless LAN 200 and the wireless LAN_AP 500 using application software or the like, and execute printing of the image data. Further, the portable terminal 300 can acquire and display image data read from the original by the image forming apparatus 100 via the wireless LAN 200 and the wireless LAN_AP 500.

  The wireless LAN_AP 500 is a radio wave relay that relays between terminals conforming to the IEEE standard such as the image forming apparatus 100 and the portable terminal 300. The wireless LAN_AP 500 may be connected to a public network such as the Internet (not shown) or a LAN.

  In this embodiment, a case where an IEEE standard wireless communication technology is used for the wireless LAN 200 will be described, but other wireless communication technology such as Bluetooth (registered trademark) may be used.

  FIG. 2 is a block diagram illustrating an example of a hardware configuration of the image forming apparatus 100 in FIG.

  The image forming apparatus 100 includes a controller 110 that controls the entire apparatus, a power supply unit 130, an operation unit 150, a human sensor 160, a scanner unit 170, and a printer unit 180.

  The power supply unit 130 supplies power to each unit in the apparatus. Details of the power supply unit 130 will be described later.

  The operation unit 150 is a user interface (UI) for the user to operate the image forming apparatus 100. The operation unit 150 includes a touch panel LCD (not shown) and hardware keys, and functions as a display unit and an operation unit.

  The scanner unit 170 optically reads an original image, converts it into image data, performs image correction, resolution conversion, and the like according to the specifications of the printer unit 180, and then sends it to the controller 110 via the scanner I / F 120. send.

  The printer unit 180 receives image data from the controller 110 via the printer I / F 121, prints the image data as a visible image on a sheet, and discharges the image data outside the apparatus.

  The human sensor 160 is a human body detection sensor configured by, for example, a pyroelectric sensor or a reflection sensor. The human sensor 160 detects a human body existing in the vicinity of the apparatus in order to operate the image forming apparatus 100. Note that any method may be used as long as it can detect the presence of a human body or a person using the apparatus in the vicinity of the image forming apparatus 100.

  Next, the configuration of the controller 110 will be described.

  In the controller 110, a CPU 111, a RAM 112, a ROM 113, and a storage 114 are connected to the system bus. Further, an operation unit I / F 115, a wireless LAN controller 116, a human sensor control / determination unit 117, a return detection unit 118, a power supply control unit 119, a scanner I / F 120, and a printer I / F 121 are also connected via a system bus. Yes.

  The CPU 111 is a central processing unit that controls the entire image forming apparatus.

  The RAM 112 is used as a memory for the CPU 111 to load and execute a program in the ROM 113. The RAM 112 is also used as a work memory for temporarily storing data used by the CPU 111 for calculation.

  The ROM 113 stores a program used for starting up the image forming apparatus 100.

  The storage 114 is a memory configured by a hard disk drive (storage) that stores software related to control of the image forming apparatus 100, various setting information, image data, and the like.

  The operation unit I / F 115 is an interface (I / F) to the operation unit 150 and relays input / output data to the operation unit 150. The CPU 111 receives key information input by the user through the operation unit 150 and coordinate information on the touch panel via the operation unit I / F 115 and controls the image forming apparatus 100 based on the received information.

  The wireless LAN controller 116 performs wireless communication with an external device via the wireless LAN 200.

  The power supply control unit 119 is connected to the power supply unit 130 and controls the power supplied from the power supply unit 130 into the apparatus. For example, the image forming apparatus 100 shifts to the power saving mode by controlling the power supply unit 130 according to an instruction from the power supply control unit 119. Further, the CPU 111 instructs the power supply control unit 119 when detecting a state in which no operation from the user is received for a certain period of time or a state in which a print job is not received for a certain period of time. To stop power supply to unnecessary parts.

  The return detection unit 118 detects a return factor from the power saving mode (a factor necessary for shifting from the power saving mode to a standby state in which the image forming apparatus can operate). Factors for returning from the power saving mode include detection of a person by a human sensor, pressing of the power saving key 151 of the operation unit 150, and the like. When the return detection unit 118 detects a return factor from the power saving mode, it notifies the power supply control unit 119 to that effect. In response to this notification, the power control unit 119 controls the power supply unit 130 to supply power to each unit, thereby returning the image forming apparatus from the power saving mode.

  When the power of the image forming apparatus 100 is turned off, the CPU 111 instructs the power supply control unit 119 to stop the power supply and controls the power supply unit 130.

  The scanner I / F 120 is an interface for connecting the scanner unit 170. A printer I / F 201 is an interface connected to the printer unit 180.

  FIG. 3 is a block diagram showing the hardware configuration and connection relationship of the power supply unit 130 in FIG.

  The power supply unit 130 includes switches 132, 133, 135, 137, a first power supply unit 134, and a second power supply unit 136.

  The AC power supply 131 is connected to the first power supply unit 134 via the switches 132 and 133 in the power supply unit 130 and is connected to the second power supply unit 136 via the switch 135.

  The switch 132 is a switch for the user to turn on or off the power of the image forming apparatus 100.

  The operation of the switch 132 is detected by the power control unit 119, and when the switch 132 is turned on, power is supplied from the AC power supply 131 to the first power supply unit 134. On the other hand, when the switch 132 is turned off, the power supply to the first power supply unit 134 is stopped.

  The first power supply unit 134 converts AC power from the AC power supply 131 into DC power, and supplies the DC power to the power control unit 119 and the like. The first power supply unit 134 is a power supply that continues to supply power even when the image forming apparatus 100 is in the power saving state (in the power saving mode).

  The second power supply unit 136 supplies power to the CPU 111, the ROM 113, and the storage 114 in accordance with a control signal from the power supply control unit 119. The second power supply unit 136 also supplies power to the operation unit 150, the scanner unit 170, and the printer unit 180 via a switch 137 configured by a relay switch, FET, or the like.

  The switch 137 is controlled by the power control unit 119, and individually controls power supply to the operation unit 150, the scanner unit 170, and the printer unit 180 by a control signal from the power control unit 119. When the image forming apparatus 100 is restored or started, the switches 135 and 137 are turned on, and power is supplied to the entire apparatus.

  The switch 133 is configured by a relay switch, an FET, or the like. The switch 133 is a switch controlled by the power supply control unit 119 and is controlled to be turned on or off by a control signal from the power supply control unit 119. The switch 132 is arranged in parallel with the switch 132 in order to continue power supply to the subsequent stage even if the switch 132 is turned off during the operation of the image forming apparatus 100.

  The switch 135 is configured by a relay switch, an FET, or the like. The switch 135 is a switch controlled by the power control unit 119 and is controlled to be turned on or off by a control signal from the power control unit 119. The switch 135 is controlled to be turned off when the image forming apparatus 100 is in the power saving mode.

  The first power supply unit 134 supplies power to the power supply control unit 119, the operation unit 150, the wireless LAN controller 116, the human sensor 160, the human sensor control / determination unit 117, the RAM 112, and the return detection unit 118.

  When the image forming apparatus 100 is in the power saving mode, power is supplied to the RAM 112 as a main storage device (main memory), and only the setting information of the CPU 111, the main program, and necessary data are stored in the RAM 112. ing.

  When any of the operation unit 150, the wireless LAN controller 116, and the human sensor control / determination unit 117 detects a return factor from the power saving state, the return detection unit 118 is notified. The return detection unit 118 determines a return factor and notifies the power supply control unit 119 according to the return factor. The power control unit 119 controls the switches 135 and 137 to start supplying power to the image forming apparatus 100.

  FIG. 4 is a block diagram illustrating a hardware configuration of the mobile terminal 300 in FIG.

  The CPU 301 is a central processing unit that controls the entire mobile terminal 300.

  The RAM 302 is used as a memory for the CPU 301 to load and execute a program in the flash ROM 303, and as a work memory for temporarily storing data used by the CPU 301 for calculation.

  The flash ROM 303 is a memory for storing programs used by the CPU 301 and various data.

  The operation unit 304 is a UI for a user to operate the mobile terminal 300, and includes a touch panel LCD (not shown) or the like.

  The wireless LAN_I / F 306 is a wireless communication interface that transmits / receives data to / from an external device via the wireless LAN 200. The wireless LAN_I / F 306 corresponds to both indirect connection wirelessly connected to the image forming apparatus 100 via the wireless LAN_AP 500 and direct connection wirelessly connected to the image forming apparatus 100 not via the wireless LAN_AP 500.

  The CPU 301, RAM 302, flash ROM 303, operation unit 304, and wireless LAN_I / F 306 are connected via a system bus 309 and exchange data with each other. Each of these units is supplied with power from a rechargeable battery (not shown).

  Next, an operation of the image forming apparatus 100 when a print job is transmitted from the portable terminal 300 to the image forming apparatus 100 and executed is described.

  FIG. 5 is a flowchart showing print job execution processing of the image forming apparatus 100 according to the first embodiment of the present invention. Each step shown in the figure is realized by the CPU 111 in the controller 110 shown in FIG. 2 loading a control program stored in the ROM 113 into the RAM 112 and controlling the entire image forming apparatus 100.

  Assume that the image forming apparatus 100 is in a power saving state (power saving mode).

  In step S501, a user present in the vicinity of the image forming apparatus 100 is detected. Specifically, when the human sensor 160 detects a person, a control signal is transmitted from the human sensor control / determination unit 117 that has received the detection result of the human sensor 160 to the return detection unit 118.

  In step S501, it may be determined whether pressing of the power saving key 151 of the operation unit 150 is detected. In that case, a control signal is transmitted from the operation unit 150 to the return detection unit 118. Further, when the human sensor 160 detects a plurality of people, the processing after step S502 may be executed in response to pressing of the power saving key 151.

  Next, in step S <b> 502, the return detection unit 118 notifies the power supply control unit 119, the power supply control unit 119 turns on the switches 135 and 137, and power is supplied from the second power supply unit 136 to each unit. Then, the CPU 111 that has received power supply executes the control program in the ROM 113 or RAM 112 to restore the image forming apparatus 100. As a result, the image forming apparatus 100 returns from the power saving state to the normal state (normal mode).

  Next, in step S <b> 503, the CPU 111 that has returned in step S <b> 502 temporarily generates an ID for establishing a wireless connection between the image forming apparatus 100 and the portable terminal 300. The ID is preferably generated every time the return detection unit 118 detects a return factor. However, each time an ID is used, a new ID may be generated by the CPU 111 and stored in the RAM 112 or the storage 114, and the CPU 111 may read the ID stored in the RAM 112 or the storage 114 when returning.

  Next, in step S504, the CPU 111 displays the ID generated in step S503 on the operation unit 150. An example of ID display is shown in FIG.

  In FIG. 7A, the wireless LAN connection setting screen 700 displays the IP address 701 of the image forming apparatus 100 to which the mobile terminal 300 is connected and the authentication ID 702. When the button 703 to the main menu on the wireless LAN connection setting screen 700 is pressed, the wireless LAN connection setting screen 700 is switched to a main menu screen 710 shown in FIG.

  In FIG. 7B, the main menu screen 710 displays a copy button 711, a send button 712, a box button 713, a wireless print button 714, and a setting button 715. A copy button 711 is a button for calling a copy function. A send button 712 is a button for performing e-mail transmission or the like. A box button 713 is a button for saving image data in the storage 114 or printing data saved in the storage 114. A wireless print button 714 is a button for performing printing by wireless LAN. A setting button 715 is a button for performing various settings of the image forming apparatus 100.

  When the wireless print button 714 on the main menu screen 710 is pressed, the screen is switched to the wireless LAN connection setting screen 700 of FIG.

  Returning to FIG. 5, in step S <b> 505, the CPU 111 determines whether the wireless LAN controller 116 has received an ID from the portable terminal 300 via the wireless LAN 200. If the ID is received, the process proceeds to step S506. On the other hand, if the ID is not received for a predetermined time, the communication with the portable terminal 300 is disconnected (step S510), and the process ends.

  In step S <b> 506, the CPU 111 determines whether the ID received from the mobile terminal 300 is the same as the ID displayed on the operation unit 150. At this time, it may be configured to additionally determine whether or not a user existing in the vicinity of the image forming apparatus 100 is continuously detected by the human sensor 160. In this case, it is determined that the authentication is successful if both the received ID matches the displayed ID and the user is in the vicinity of the image forming apparatus. If the authentication is successful, the print job received from the portable terminal 300 can be executed. Note that, when the authentication is not successful, it is preferable that a notification that the authentication is not successful is transmitted from the image forming apparatus 100 to the portable terminal 300.

  In step S <b> 507, the CPU 111 causes the printer unit 180 to execute the print job received by the wireless LAN controller 116 from the portable terminal 300. After executing the job, the CPU 111 notifies the end of the print job from the wireless LAN controller 116 to the portable terminal 300 via the wireless LAN 200.

  In step S <b> 508, the CPU 111 determines whether the wireless LAN controller 116 has received a communication disconnection notification from the mobile terminal 300. If there is a communication disconnection notification, the process proceeds to step S510, and communication with the mobile terminal 300 is disconnected. On the other hand, even if there is no communication disconnection notification (NO in step S508) and a predetermined time has elapsed (YES in step S509), the process proceeds to step S510 and communication is disconnected. This predetermined time is a predetermined time after the end of execution of the print job when a print job execution instruction is issued from the mobile terminal 300. On the other hand, when there is no print job execution instruction, it is a predetermined time after the authentication success notification is transmitted to the mobile terminal 300 after successful authentication.

  FIG. 6 is a sequence diagram illustrating data exchange between the image forming apparatus 100 and the mobile terminal 300 described with reference to FIG. Note that the steps described in FIG. 5 are denoted by the same reference numerals and description thereof is omitted.

  Each step from step S701 to step S705 is realized by the CPU 301 shown in FIG. 4 loading a control program stored in the flash ROM 303 into the RAM 302 to control the entire portable terminal 300.

  In step S <b> 702, when the user approaches the image forming apparatus 100 with the portable terminal 300, the CPU 301 displays a list of devices that can be wirelessly connected to the operation unit 304 and accepts device instructions.

  In step S <b> 703, the CPU 301 starts communication with the image forming apparatus 100 via the wireless LAN 200 via the wireless LAN_I / F 306, and accepts input of an ID displayed on the operation unit 150 of the image forming apparatus 100.

  In step S704, the CPU 301 transmits the ID input by the user in step S703 to the image forming apparatus 100 via the wireless LAN 200 by the wireless LAN_I / F 306.

  In step S <b> 705, upon receiving a notification of successful authentication from the image forming apparatus 100, the CPU 301 receives a print job execution instruction from the user.

  In step S <b> 706, upon receiving a job end notification from the image forming apparatus 100, the CPU 301 transmits a communication disconnection notification to the image forming apparatus 100 in accordance with an instruction from the user, and then communicates with the image forming apparatus 100. Disconnect communication.

  According to the first embodiment, when the human sensor 160 detects a user in the vicinity of the image forming apparatus 100, an ID for establishing a wireless connection with the mobile terminal 300 possessed by the user is obtained. The generated ID is displayed on the operation unit 150. Authentication is performed based on the ID received from the user's mobile terminal 300 via the wireless LAN controller 116, and a job is received from the mobile terminal 300 that has been successfully authenticated and executed. Thereby, it is possible to easily perform wireless communication with the mobile terminal possessed by the user for the user near the image forming apparatus.

[Second Embodiment]
In the first embodiment, the case where the image forming apparatus 100 and the portable terminal 300 perform wireless LAN communication via an access point has been described. However, in the second embodiment of the present invention, the image forming apparatus 100 and the portable terminal 300 are portable. A case where the terminal 300 performs direct wireless LAN communication will be described.

  In the second embodiment of the present invention, the configuration shown in FIGS. 1 to 4 is the same as that in the first embodiment, and the same reference numerals are used for the same parts as in the first embodiment. The description is omitted. Only differences from the first embodiment will be described below.

  FIG. 8A is a diagram illustrating an example of a wireless LAN connection setting screen displayed on the operation unit 150 of the image forming apparatus according to the second embodiment.

  In FIG. 8A, the wireless LAN connection setting screen 800 displays an SSID 801 and an encryption key 802 for wireless LAN communication. This embodiment is different in that an SSID and an encryption key are newly generated in step S503 of FIG. When a user having the mobile terminal 300 inputs the SSID and encryption key displayed on the wireless LAN connection setting screen 800 to the mobile terminal 300, direct wireless LAN between the mobile terminal 300 and the image forming apparatus 100 is obtained. Connection is started.

  FIG. 8B is a diagram illustrating another example of the wireless LAN connection setting screen displayed on the operation unit 150 of the image forming apparatus according to the second embodiment.

  In FIG. 8B, the wireless LAN connection setting screen 805 displays the wireless LAN communication SSID, encryption key, and temporary ID. In this case, the SSID and the encryption key are fixed values, and a difference is that a temporary ID is newly generated in step S503 in FIG. ID authentication is performed by transmitting the SSID, encryption key, and temporary ID as a set from the portable terminal 300 to the image forming apparatus 100.

  According to the second embodiment, the same effect as in the first embodiment can be obtained. Furthermore, the image forming apparatus 100 and the portable terminal 300 can directly perform wireless communication without using the wireless LAN_AP 500 or the public network.

[Third Embodiment]
In the third embodiment of the present invention, a function of detecting the radio wave intensity of the wireless LAN is added to the first embodiment or the second embodiment.

  FIG. 9 is a flowchart showing print job execution processing of the image forming apparatus 100 according to the third embodiment of the present invention. In this processing, step S501 shown in FIG. 5 is changed to step S901, and the same step number is assigned to the same step as each step shown in FIG.

  In step S901, as in step S501 of FIG. 5, a user existing in the vicinity of the image forming apparatus 100 is detected. Further, in step S901, the wireless LAN controller 116 detects the radio wave intensity of a wireless LAN such as a portable terminal existing around the apparatus. Then, based on the human detection result and the wireless LAN radio wave intensity detection result, it is determined whether the user who owns the portable terminal 300 or the like is in the vicinity of the image forming apparatus 100. That is, before and after the human detection, if the wireless LAN radio field intensity is a predetermined value or more, or if the radio LAN radio field intensity is increasing, the user who owns the portable terminal 300 or the like Judged to be in the vicinity. On the other hand, if a person is detected, but the radio LAN radio field intensity is less than a predetermined value or the radio LAN radio field intensity is low, the processes in and after step S503 are not executed. Note that the same applies to the case where the human sensor 160 detects a plurality of people in step S901.

  According to the third embodiment, the same effect as in the first embodiment can be obtained. Furthermore, when only the user who possesses the portable terminal is detected, wireless communication between the image forming apparatus 100 and the portable terminal 300 becomes possible, so that it is possible to reduce useless restoration processing of the image forming apparatus.

  In the first to third embodiments, the case of returning from the power saving state to the normal state has been described. However, even in the normal state, the same processing is executed only by omitting the return processing.

  5 and 9, the human sensor 160 always detects a user in the vicinity of the apparatus, and when the user (human body) cannot be detected by the human sensor 160 after the communication is started, the communication is disconnected. Then, it may be configured to return to the initial state.

  The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

100 Image forming apparatus 111 CPU
118 Return detection unit 130 Power supply unit 150 Operation unit 160 Human sensor 200 Wireless LAN
300 Mobile terminal 400 Wireless LAN access point

Claims (10)

In an image forming apparatus including a wireless communication unit,
Human detection means for detecting a user in the vicinity of the image forming apparatus;
When the user is detected by the human detection means, a generating means for generating an ID for establishing a wireless connection with a mobile terminal possessed by the user;
Display means for displaying the ID generated by the generating means;
Authentication means for performing authentication based on an ID received from the portable terminal via the wireless communication means;
An image forming apparatus comprising: a job execution unit that receives and executes a job from a portable terminal that has been successfully authenticated by the authentication unit.   The image forming apparatus according to claim 1, wherein the wireless communication unit performs wireless communication with the portable terminal directly or via a radio relay device.   3. The authentication unit according to claim 1, wherein the authentication unit determines that the authentication is successful when an ID displayed on the display unit matches an ID received via the wireless communication unit. Image forming apparatus.   The authentication means authenticates when the ID displayed on the display means matches the ID received via the wireless communication means, and the user is continuously detected by the human detection means. The image forming apparatus according to claim 1, wherein the image forming apparatus is determined to be successful.   When a communication disconnection notification is received from the mobile terminal after a job is executed by the job means or when a predetermined time has elapsed, the wireless communication means disconnects wireless communication with the mobile terminal. The image forming apparatus according to any one of claims 1 to 4.   6. The image forming apparatus according to claim 1, further comprising a return unit that returns from a power saving state to a normal state when a user is detected by the human detection unit.   The image forming apparatus according to claim 6, wherein the generation unit generates an ID for each return by the return unit. Radio wave intensity detecting means for detecting radio wave intensity of the wireless communication means,
The generation means establishes a wireless connection with the mobile terminal when the human detection means detects the user and the radio wave intensity detection means detects a mobile terminal having a radio field intensity equal to or higher than a predetermined value. The image forming apparatus according to claim 1, wherein an ID for generating the image is generated. In a communication method of an image forming apparatus including a wireless communication unit,
A human detection process for detecting a user in the vicinity of the image forming apparatus;
When a user is detected in the human detection process, a generation process for generating an ID for establishing a wireless connection with a mobile terminal possessed by the user;
A display step for displaying the ID generated in the generation step;
An authentication step of performing authentication based on an ID received from the portable terminal via the wireless communication means;
And a job execution step of receiving and executing a job from the portable terminal that has been successfully authenticated in the authentication step. A computer-readable program for causing an image forming apparatus to execute the communication method according to claim 9.

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