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Communication device and control method thereof

A technology of a communication device and a control unit, which is applied in the directions of wireless communication, image communication, wireless communication service, etc., can solve the problems such as the inability of the device to change the power-off mode, the inability to detect the connection, and the inability to detect the network connection.

Active Publication Date: 2019-08-23
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as described above, in the deep sleep mode, no power is supplied to components other than the circuit for detecting an incoming call.
This poses the following problem: In deep sleep mode, no connection to the network can be detected
Therefore, even if the device is disconnected from the network in deep sleep mode, the device cannot transition to power-off mode since the connection to the network cannot be detected in deep sleep mode

Method used

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  • Communication device and control method thereof
  • Communication device and control method thereof
  • Communication device and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0040] figure 1 is a block diagram for explaining the arrangement of the image forming apparatus 100 according to the first embodiment of the present invention.

[0041] A system on chip (SOC) 101 includes a CPU 200 , and controls the overall operation of the image forming apparatus 100 . The memory 140 is connected to the SOC 101, serves as a main storage device accessible to the CPU 200, and is used as a work memory of the CPU 200 as well as a memory for storing control programs. The memory 140 is also used as a memory for temporarily storing image data and various information at the time of facsimile transmission or reception, and is also used to store information set by the user. The SDAA program 202 is a program to be executed by the DSP 205 of the modem 102 , and is transferred to the modem 102 , loaded into the RAM 204 , and then executed by the DSP 205 .

[0042] An operation panel 118 , a reading unit 121 , a recording unit 122 , and an I / F unit 123 are connected t...

no. 2 example

[0078] Next, a second embodiment of the present invention will be described. In the second embodiment, if a circuit belonging to the second power system circuit 4002 or the third power system circuit 4003 is connected to the network, only the second power system circuit 4002 is activated to determine connection to the network belonging to the power system. The connection to the network belonging to the third power supply system circuit 4003 is not determined so that it is not necessary to activate the third power supply system circuit 4003, which suppresses power consumption.

[0079] The state of supplying electric power to all the first power system circuits 4001, the second power system circuits 4002, and the third power system circuits 4003 corresponds to the reference Figure 5 Describes the standby mode 1. The state of supplying power only to the first power system circuit 4001 and the second power system circuit 4002 corresponds to the reference Figure 5 Describe the...

no. 3 example

[0090] Next, a third embodiment of the present invention will be described. In the third embodiment, a case will be described in which it is possible to always detect whether or not a link between the LAN 240 and the network I / F 127 (belonging to the first power supply system circuit 4001 ) is established. Note that the arrangement of the image forming apparatus 100 according to the third embodiment is the same as that according to the first embodiment described above, and a description thereof will be omitted here.

[0091] Figure 9A and 9B is a flowchart for explaining the processing of the image forming apparatus 100 according to the third embodiment. Figure 9A shows the processing performed by the CPU 200, and Figure 9B Processing performed by the I / F unit 123 is shown.

[0092] Figure 9A The processing in steps S901 to S906 is the same as Image 6 The steps S601 to S606 are the same, and the description thereof will be omitted here. If the CPU 200 determines in...

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Abstract

The invention provides a communication device and a control method thereof. The communication device is capable of connecting to a plurality of lines for communication, and transitions to the sleep mode when a condition for transition to the sleep mode is satisfied, and measures a time for which the sleep mode continues. When the measured time reaches a predetermined time, the communication device returns from the sleep mode, and determines whether itself is connected to at least one of the plurality of lines. The communication device is not powered down if it is determined that the communication device is connected to at least one of the plurality of lines.

Description

technical field [0001] The invention relates to a communication device and a control method thereof. Background technique [0002] In recent years, communication devices are expected to further reduce their power consumption. In order to further reduce the power consumption of the communication device, in addition to cutting standby power, the power consumption is also drastically reduced when the communication device is not connected to a network via a LAN or a telephone line and is not used for a given time. For example, Japanese Patent Application Laid-Open No. 2006-254384 describes a technique in which an image forming apparatus connected to a network detects a connection state with the network, and powers on / off a network function based on the detection result. [0003] Such power management is considered mandatory in the European Environmental Directive (Lot 26) and will be mandated by law in the near future. Lot 26 stipulates that when all wireless network ports are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/00H04W52/02H04W76/10
CPCH04W52/0225H04N1/00H04N1/00002H04L12/12H04L43/0817Y02D30/50
Inventor 福岛道雄大原荣治须贺大介
Owner CANON KK
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