JP6460346B2 - Electronic equipment and power control program - Google Patents

Description

  The present invention relates to an electronic device and a power control program that intermittently repeats temporary return of power supply to a specific processing apparatus in a power saving state.

  Conventionally, an image forming apparatus including a first processing device capable of executing processing according to received data and a second processing device capable of executing processing according to received data not supported by the first processing device Is known (for example, see Patent Document 1). The power state of the image forming apparatus described in Patent Document 1 includes at least a temporary state in which processing according to received data can be executed by the second processing device and power supply to the second processing device at least temporarily. And a power saving state in which processing according to received data can be executed by the first processing device. In the image forming apparatus described in Patent Document 1, the temporary return of the supply of power to the second processing apparatus is intermittently repeated in the power saving state.

JP 2014-231175 A

  However, the conventional image forming apparatus does not consider the operation when a packet of “protocol that does not perform delivery confirmation” is received during the temporary return in the power saving state. The transmission of the response packet toward the communication partner that has transmitted the packet "is delayed by the stop of the supply of power to the second processing device, thereby giving the communication partner the misrecognition that the response packet is not transmitted. There is a possibility.

  In view of the above, an object of the present invention is to provide an electronic device and a power control program that can reduce the possibility of giving a communication partner a misrecognition that a response packet is not transmitted due to a delay in the transmission of the response packet. And

  The electronic apparatus according to the present invention includes a first processing device capable of executing processing according to received data, and a second processing capable of executing processing according to the received data not supported by the first processing device. A power state control means for controlling a power state of the electronic device, wherein the second processing device can execute processing according to the received data in the power state A normal state and a power saving state in which the supply of power to the second processing device is at least temporarily stopped and the processing according to the received data can be executed by the first processing device. In the power saving state, the power state control means, when the temporary return of the supply of power to the second processing apparatus is repeated intermittently, Do not confirm delivery When the packet of “protocol” is included, the temporary return of this time is compared with the case where the packet of “protocol without delivery confirmation” is not included in the received data during the temporary return of this time It is characterized by extending the time.

  With this configuration, the electronic device according to the present invention allows the temporary data in the power saving state to be temporarily received when the received data during the temporary restoration in the power saving state includes a packet of “protocol not performing delivery confirmation”. The temporary recovery is completed before sending a response packet to the “Protocol for which no delivery confirmation is performed” packet of the temporary recovery that is in the power saving state. The possibility of doing it can be suppressed. Therefore, the electronic device according to the present invention suppresses delay in transmission of the response packet toward the communication partner that has transmitted the packet of “protocol that does not perform delivery confirmation”, so that the erroneous recognition that the response packet is not transmitted is performed. The possibility of giving a response packet to a communication partner due to a delay in transmission of the response packet can be reduced.

  In the electronic device according to the present invention, the power state control means includes the extended time when the received data during the extended time during the temporary recovery includes a packet of “protocol not performing delivery confirmation”. The temporary restoration time this time may be further extended as compared to the case where the received data in the packet does not include a “protocol for which delivery confirmation is not performed”.

  With this configuration, the electronic device of the present invention is in the power saving state when the received data during the extended time during the current temporary restoration in the power saving state includes a “protocol that does not perform delivery confirmation” packets. Since the temporary recovery time will be further extended, before the response packet is sent to the “Protocol for which delivery confirmation is not performed” of the received data during the extended time during the temporary recovery in the power saving state. The possibility that the temporary return of this time will be terminated can be suppressed. Therefore, the electronic device according to the present invention suppresses delay in transmission of the response packet toward the communication partner that has transmitted the packet of “protocol that does not perform delivery confirmation”, so that the erroneous recognition that the response packet is not transmitted is performed. The possibility of giving a response packet to a communication partner due to a delay in transmission of the response packet can be reduced.

  The power control program of the present invention includes a first processing device capable of executing processing according to received data, and a second processing device capable of executing processing according to the received data not supported by the first processing device. The electronic device is executed by an electronic device including a processing device and functions as a power state control unit that controls a power state of the electronic device, and the power state is determined according to the received data by the second processing device. A normal state in which the processing can be executed, and a power saving state in which the first processing device can execute the processing according to the received data by at least temporarily stopping the supply of power to the second processing device And the power state control means performs the current temporary recovery when the temporary return of power supply to the second processing device is intermittently repeated in the power saving state. When a packet of “Protocol for which no delivery confirmation is performed” is included in the received data in the above, and a packet of “Protocol for which no delivery confirmation is performed” is not included in the received data during the temporary return this time Compared to the above, the temporary restoration time of this time is extended.

  With this configuration, the electronic device that executes the power control program of the present invention saves power when a packet of “protocol that does not perform delivery confirmation” is included in the reception data that is temporarily restored in the power saving state. This will extend the time for this temporary return in the state, so before sending the response packet for the “Protocol for which no delivery confirmation” packet is received out of the temporary return data in the power saving state this time The possibility that the temporary return ends can be suppressed. Therefore, the electronic device that executes the power control program of the present invention suppresses delay in transmission of the response packet toward the communication partner that has transmitted the packet of “protocol that does not perform delivery confirmation”. It is possible to reduce the possibility of giving an erroneous recognition that it is not done to the communication partner due to a delay in transmission of the response packet.

  The electronic device and the power control program according to the present invention can reduce the possibility of giving a false recognition that the response packet is not transmitted to the communication partner due to the delay of the response packet transmission.

1 is a block diagram of an MFP according to an embodiment of the present invention. FIG. 2 is a block diagram of the MFP shown in FIG. 1 in a normal state. FIG. 2 is a block diagram of the MFP shown in FIG. 1 in a power saving state. FIG. 2 is a diagram illustrating an example of a time change in power consumption of the MFP illustrated in FIG. 1. FIG. 2 is a diagram illustrating an example of a temporal change in power consumption of the MFP illustrated in FIG. It is a flowchart of operation | movement of the timer processing means shown in FIG. 1 during temporary return. It is a flowchart of operation | movement of the electric power state control means shown in FIG. 1 during temporary return. (A) It is a figure which shows an example of the time of temporary return before extended by the operation | movement shown in FIG. (B) It is a figure which shows an example of the time of the temporary return after extending by the operation | movement shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  First, the configuration of an MFP (Multifunction Peripheral) as an electronic apparatus according to the present embodiment will be described.

  FIG. 1 is a block diagram of MFP 10 according to the present embodiment.

  As illustrated in FIG. 1, the MFP 10 includes an operation unit 11 that is an input device such as buttons for inputting various operations, and a display unit 12 that is a display device such as an LCD (Liquid Crystal Display) that displays various information. And a scanner 13 that reads an image from a document, a printer 14 that performs printing on a recording medium such as paper, and an external facsimile apparatus (not shown) and a communication line such as a public telephone line A fax communication unit 15 that is a fax device that performs fax communication, a PHY 16 that is a network communication device that communicates with an external device via a network such as a LAN (Local Area Network), a semiconductor memory that stores various information, HDD (Hard Di The storage unit 17 that is a non-volatile storage device such as “sk Drive”, the main controller (MAIN Controller) 18 that is a device that can execute processing according to the received data of all protocols supported by the MFP 10, and the MFP 10 supports The sub-controller (SUB Controller) 19 which is a device capable of executing processing according to received data of only a part of all the protocols to be performed, and transmission / reception of network packets to either the main controller 18 or the sub-controller 19 And a switcher 20 that is a switching device.

  The storage unit 17 stores a power control program 17 a for controlling the power of the MFP 10. The power control program 17a may be installed in the MFP 10 at the manufacturing stage of the MFP 10, or may be additionally installed in the MFP 10 from an external storage medium such as an SD card or a USB (Universal Serial Bus) memory, It may be additionally installed in the MFP 10 from above.

  The storage unit 17 can store a plurality of received data 17b by the PHY 16.

  The storage unit 17 can store a timer processing interval 17c indicating a time interval of timer processing described later for each type of timer processing.

  The storage unit 17 can store a temporary return time initial value 17d indicating an initial value of a temporary return time, which will be described later, and a temporary return time addition value 17e indicating an added amount of the temporary return time. The temporary return time addition value 17e is, for example, 1 second.

  The main controller 18 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory) storing programs and various data, and a RAM (Random Access Memory) used as a work area of the CPU of the main controller 18 itself. ). The CPU of the main controller 18 executes a program stored in the storage unit 17 or the ROM of the main controller 18.

  Similarly, the sub-controller 19 includes, for example, a CPU, a ROM that stores programs and various data, and a RAM that is used as a work area for the CPU of the sub-controller 19 itself. The CPU of the sub controller 19 executes a program stored in the ROM of the sub controller 19.

  The main controller 18 can execute processing according to received data of a protocol not supported by the sub-controller 19. For example, the main controller 18 can execute a printing process by the printer 14 in accordance with received data of a printing protocol such as an LPR (Line Printer Daemon protocol) or a Raw protocol. However, the sub-controller 19 cannot execute the printing process by the printer 14 according to the received data of the printing protocol. That is, the main controller 18 and the sub controller 19 constitute a second processing device and a first processing device of the present invention, respectively.

  Further, the main controller 18 can request the DHCP server to update the lease period of the IP (Internet Protocol) address of the MFP 10 as a DHCP (Dynamic Host Configuration Protocol) client before the end of the lease period. On the other hand, the sub-controller 19 cannot update the lease period of the IP address of the MFP 10 in terms of performance.

  Further, the main controller 18 indicates a report mail as an e-mail for notifying various states in the MFP 10 such as the remaining amount of toner in the printer 14 and the value of the print counter at a timer processing interval 17c such as every minute. It is possible to transmit at every time interval. On the other hand, the sub-controller 19 cannot execute the transmission of the report mail in terms of performance.

  The sub-controller 19 can execute processing according to received data of a protocol that is frequently transmitted and received in the network, such as ARP (Address Resolution Protocol).

  As described above, the sub-controller 19 has fewer types of processes that can be executed than the main controller 18. Therefore, the performance of the sub controller 19 may be lower than that of the main controller 18. For example, the CPU of the sub controller 19 may have a lower processing capacity than the CPU of the main controller 18. Further, the RAM of the sub-controller 19 may have a smaller storage capacity than the RAM of the main controller 18. When the performance of the sub-controller 19 is low compared to the performance of the main controller 18, the power consumed by the sub-controller 19 is less than the power consumed by the main controller 18.

  The main controller 18 is connected to the operation unit 11, display unit 12, scanner 13, printer 14, fax communication unit 15, storage unit 17, sub-controller 19, and switcher 20. The main controller 18 is also connected to the PHY 16 via the switcher 20.

  The sub controller 19 is connected to the operation unit 11, the fax communication unit 15, the storage unit 17, the main controller 18, and the switcher 20. The sub-controller 19 is also connected to the PHY 16 via the switcher 20.

  The switcher 20 continues to count the number of packets of a specific protocol included in the data received by the PHY 16. Here, the specific protocol is a “protocol that does not perform delivery confirmation” such as a simple network management protocol (SNMP) or a UDP (User Datagram Protocol) protocol such as a DNS (Domain Name System) protocol, and is a sub-controller. 19 is a protocol that cannot be responded by. The specific protocol does not include a “protocol for performing delivery confirmation” such as a TCP (Transmission Control Protocol) protocol.

  The main controller 18 executes a power control program 17a stored in the storage unit 17 to execute a power state control unit 18a for controlling the power state of the MFP 10 and a specific process (hereinafter referred to as “timer”) by the main controller 18 itself. It functions as a timer processing means 18b that repeats "processing") intermittently according to time.

  Here, the timer process includes the update of the lease period of the IP address of the MFP 10 described above and the transmission of the report mail described above. Note that the time interval for repeating the timer process can be set by the administrator of the MFP 10.

  FIG. 2 is a block diagram of the MFP 10 in a normal state.

  In FIG. 2, the device for which the supply of power is stopped is drawn with black and white reversed. That is, in FIG. 2, the sub controller 19 is stopped from supplying power. Of the components of the MFP 10 shown in FIG. 2, power is supplied to the components other than the sub-controller 19.

  In the normal state, the switcher 20 switches transmission / reception of network packets to the main controller 18 among the main controller 18 and the sub-controller 19. Therefore, in the normal state, processing according to the received data by the PHY 16 is executed by the main controller 18.

  As described above, when the power consumed by the sub-controller 19 is small compared to the power consumed by the main controller 18, even if power is supplied to the sub-controller 19, the power consumed by the sub-controller 19 is It is thought that it is slight. Therefore, power may be supplied to the sub-controller 19 in the normal state. Of the processes according to the received data by the PHY 16, the processes that can be executed by the sub-controller 19 are executed by the sub-controller 19 instead of the main controller 18 even in the normal state. 19 needs to be supplied with electric power. Even when the main controller 18 is configured to receive data received by the PHY 16 via the sub-controller 19, it is necessary to supply power to the sub-controller 19 in a normal state.

  FIG. 3 is a block diagram of the MFP 10 in the power saving state.

  In FIG. 3, the device for which power supply is stopped is drawn with black and white reversed. That is, compared with the normal state shown in FIG. 2, in FIG. 3, the supply of power to the main controller 18 is stopped and the power is supplied to the sub-controller 19. In the power saving state, supply of power to at least one of various devices connected to the main controller 18 such as the printer 14 in addition to the main controller 18 may be stopped.

  In the power saving state, the switcher 20 switches transmission / reception of network packets to the sub controller 19 among the main controller 18 and the sub controller 19. Therefore, in the power saving state, processing according to the received data by the PHY 16 is executed by the sub-controller 19.

  FIG. 4 is a diagram illustrating an example of a temporal change in power consumption of the MFP 10.

  In FIG. 4, W1 is the power consumption when the power state of the MFP 10 is the normal state. W2 is the power consumption when the power state of the MFP 10 is the power saving state.

  As shown in FIG. 4, the power state control unit 18 a can switch the power state of the MFP 10 from the normal state to a power saving state in which power consumption is smaller than that in the normal state. For example, in the normal state, the power state control unit 18a performs an operation through a portion other than the button for shifting to the power saving state (hereinafter referred to as “Sleep button”) in the operation unit 11, print data, or the like. When there is no specific reception data via the PHY 16 for a specific time or more, the power state of the MFP 10 can be switched to the power saving state. In addition, the power state control unit 18a can switch the power state of the MFP 10 to the power saving state when there is an operation through the Sleep button in the normal state.

  Even when the MFP 10 is in a power saving state, the sub controller 19 can perform a basic network response, so that the network connectivity can be guaranteed.

  The sub-controller 19 can switch the power state of the MFP 10 from the power saving state to a normal state where the power consumption is larger than the power saving state. For example, the sub controller 19 can switch the power state of the MFP 10 to the normal state when there is an operation via the operation unit 11 in the power saving state. In addition, the sub controller 19 can switch the power state of the MFP 10 to the normal state when there is specific received data via the PHY 16 such as print data in the power saving state. When the sub-controller 19 receives specific received data to be processed by the main controller 18 via the PHY 16 in the power saving state, the sub-controller 19 stores the received data in the storage unit 17 as the received data 17b, thereby returning the main data after restoration. The received data 17b can be transferred to the controller 18 via the storage unit 17.

  If the received data is data that cannot be processed by the sub-controller 19 when the power state is the power saving state, the MFP 10 returns the main controller 18 by switching the power state from the power saving state to the normal state, and returns. Since the response is made by the main controller 18 later, the network connectivity can be maintained.

  Note that the power consumption in the power saving state is W2 mainly as shown in FIG. However, in actuality, the temporary return of power supply to the main controller 18 in the power saving state (hereinafter referred to as “temporary return”) is repeated intermittently, so that it is not always W2.

  FIG. 5 is a diagram illustrating an example of a temporal change in power consumption of the MFP 10 in the power saving state.

  In FIG. 5, W3 is the power consumption in the temporary return state. W3 is equal to or less than W1 in FIG. When the power supply state to the various devices in the MFP 10 is the same in the normal state and the temporary return state, W3 is equal to W1. On the other hand, when the supply of power to a device such as the printer 14 to which power is supplied in the normal state is stopped in a temporary return state, W3 is smaller than W1.

  As shown in FIG. 5, the sub-controller 19 repeats temporary return intermittently in the power saving state. Here, the time interval t1 from the start to the end of the temporary return indicated by the temporary return time initial value 17d is usually extremely short compared to the time interval t2 from the end of the temporary return to the start of the next temporary return. . For example, the time interval t1 is about 100 to 200 milliseconds, but the time interval t2 is often about 3 to 30 seconds.

  Next, the operation of the MFP 10 will be described.

  FIG. 6 is a flowchart of the operation of the timer processing means 18b during the temporary return.

  As shown in FIG. 6, the timer processing means 18b corrects the clock by the CPU of the main controller 18 by a real time clock (not shown) by temporary return (S51).

  Next, the timer processing means 18b determines whether or not the time interval indicated by the timer processing interval 17c has elapsed since the previous execution of the timer processing based on the clock by the CPU of the main controller 18 (S52). .

  If the timer processing means 18b determines in S52 that the time has elapsed, it executes timer processing (S53) and ends the operation shown in FIG. On the other hand, if it is determined in S52 that the timer processing unit 18b has not elapsed, the timer processing unit 18b ends the operation shown in FIG. 6 without executing the timer processing.

  The timer processing means 18b repeats the processing of S52 and S53 for each type of timer processing.

  For example, the timer processing unit 18b requests the DHCP server to update the lease period of the IP address of the MFP 10 at the time interval indicated by the timer processing interval 17c, such as when half of the lease period of the IP address of the MFP 10 has elapsed. .

  In addition, the timer processing unit 18b transmits a report mail at a time interval indicated by the timer processing interval 17c, such as every minute.

  FIG. 7 is a flowchart of the operation of the power state control means 18a during the temporary return.

  The power state control means 18a starts the operation shown in FIG. 7 when the temporary return is started.

  As shown in FIG. 7, the power state control means 18a checks the number of packets of a specific protocol counted by the switcher 20 (S61).

  Next, the power state control unit 18a determines whether or not the temporary return is finished until it is determined that the temporary return is finished (S62). Here, the power state control means 18a determines the time point at which the time indicated by the temporary return time initial value 17d reaches the time point until the temporary return is completed until the time of the temporary return is extended in S65 described later. On the other hand, after the time for temporary return is extended in S65, which will be described later, the power state control means 18a determines the time when the extended time is reached as the time when the temporary return ends.

  When the power state control means 18a determines in S62 that the temporary return is completed, the power state control means 18a checks the number of packets of a specific protocol counted by the switcher 20 (S63).

  Next, the power state control unit 18a determines whether or not a packet of a specific protocol has been received (S64). Here, the power state control unit 18a determines that the packet of the specific protocol is not received when the number confirmed in S61 is not different from the number confirmed in S63. On the other hand, when the number confirmed in S61 is different from the number confirmed in S63, the power state control unit 18a determines that a packet of a specific protocol has been received.

  When determining in S64 that the packet of the specific protocol has been received, the power state control means 18a extends the current temporary return time by the time indicated by the temporary return time addition value 17e (S65). In other words, the power state control unit 18a extends the time interval t1 of the current temporary return.

  In addition, the main controller 18 transmits a response packet for a packet of a specific protocol among the received data during the temporary return this time in the time extended in S65.

  The power state control unit 18a executes the process of S61 after the process of S65.

  If the power state control unit 18a determines in S64 that a packet of a specific protocol has not been received, the power state control unit 18a starts a process of stopping the supply of power to the main controller 18 (S66) and ends the operation shown in FIG. To do. When the supply of power to the sub-controller 19 is stopped during the temporary return, the power state control unit 18a, before starting the process of stopping the supply of power to the main controller 18 in S66, The power is supplied to the sub controller 19. When stopping the supply of power to the main controller 18 is executed by the sub-controller 19, starting the process of stopping the supply of power to the main controller 18 in S66 means supplying power to the main controller 18 Is to request the sub-controller 19 to stop. When the supply of power to the main controller 18 is stopped, the temporary return state ends.

  Therefore, the time interval t1 of this temporary return is the initial value of the temporary return time as shown in FIG. 8A when a packet of a specific protocol is not received during the current temporary return (NO in S64). When a packet of a specific protocol is received during the current temporary return (YES in S64), the time interval is extended as shown in FIG. 8B.

  As described above, when the received data during the temporary return in the power saving state includes a “protocol not to confirm delivery” packet (YES in S64), the MFP 10 determines that the current data in the power saving state is Since the time for temporary return is extended (S65), the current temporary return ends before transmission of a response packet for a packet of “protocol for which delivery confirmation is not performed” among the received data during the current temporary return in the power saving state. The possibility can be suppressed. Therefore, the MFP 10 suppresses delay in transmission of the response packet toward the communication partner that has transmitted the “protocol that does not perform delivery confirmation” packet. Therefore, the MFP 10 recognizes that the response packet is not transmitted. It is possible to reduce the possibility of giving to the communication partner due to the delay of. That is, the MFP 10 can maintain network connectivity.

  Further, when the received data during the extended time during the current temporary return in the power saving state includes a packet of “protocol not performing delivery confirmation” (after S65, YES in S64), the MFP 10 saves the power saving state. Since the time of the temporary return at this time is further extended (S65), before the response packet is transmitted to the packet of “Protocol for which delivery confirmation is not performed” among the received data during the extended time during the current temporary return in the power saving state The possibility that the temporary return of this time will end can be suppressed. Therefore, the MFP 10 suppresses delay in transmission of the response packet toward the communication partner that has transmitted the “protocol that does not perform delivery confirmation” packet. Therefore, the MFP 10 recognizes that the response packet is not transmitted. It is possible to reduce the possibility of giving to the communication partner due to the delay of.

  In addition, when the received data during the current temporary return in the power saving state includes a packet of “protocol for delivery confirmation”, among the received data during the current temporary return in the power saving state, “confirm delivery” Even if this temporary return is completed before the transmission of the response packet to the protocol packet, a delivery confirmation is received from the communication partner. Therefore, when the delivery confirmation arrives during the time interval t2 from the end of the current temporary return to the start of the next temporary return in the power saving state, the MFP 10 executes the next temporary return when the delivery confirmation arrives. Thus, transmission of the response packet by the main controller 18 can be executed.

  The electronic apparatus of the present invention is an MFP in this embodiment, but may be an image forming apparatus other than an MFP, such as a copy-only machine, a printer-only machine, a FAX-only machine, or a scanner-only machine, or a PC (Personal) Electronic devices other than the image forming apparatus such as a computer may be used.

10 MFP (electronic equipment)
17a Power control program 17b Received data 18 Main controller (second processing device)
18a Power state control means 19 Sub-controller (first processing device)

Claims (3)

A first processing device capable of executing processing according to received data;
An electronic device comprising: a second processing device capable of executing processing according to the received data that is not supported by the first processing device;
Comprising power state control means for controlling the power state of the electronic device,
The power state includes
A normal state in which processing according to the received data can be executed by the second processing device;
A power saving state in which the supply of power to the second processing device is at least temporarily stopped and the first processing device can execute processing according to the received data,
In the power saving state, the power state control means adds the received data during the temporary restoration to the current data when the temporary restoration of the supply of power to the second processing apparatus is repeated intermittently. when that contain packets "no acknowledgment protocol", compared to when no include packets of said received data in time of the temporary return "no acknowledgment protocol", Extend the temporary return time this time,
The power state control means, when the received data currently being temporarily restored does not include a packet of the “protocol for which delivery confirmation is not performed”, the received data currently being temporarily restored. to even include packet "protocol for acknowledgment", without extending the time of the current of the temporary restoration,
The power state control means receives the delivery confirmation when the delivery confirmation arrives during a time interval from the end of the temporary return this time in the power saving state to the start of the next temporary return. The next temporary return is performed,
When the delivery confirmation arrives during the time interval from the end of the current temporary return in the power saving state to the start of the next temporary return in the power saving state, the second processing apparatus confirms the delivery confirmation. An electronic apparatus, wherein a response packet is transmitted during the next temporary return, which is executed by the power state control means when it arrives.   The power state control means, when the received data during the extended time during the temporary recovery this time includes a packet of the “protocol not performing delivery confirmation”, the received data during the extended time 2. The electronic device according to claim 1, wherein the temporary restoration time is further extended as compared with a case where a packet of the “protocol not performing delivery confirmation” is not included. A first processing device capable of executing processing according to received data;
Executed by an electronic device including a second processing device capable of executing processing according to the received data that is not supported by the first processing device;
Causing the electronic device to function as power state control means for controlling the power state of the electronic device;
The power state includes
A normal state in which processing according to the received data can be executed by the second processing device;
A power saving state in which the supply of power to the second processing device is at least temporarily stopped and the first processing device can execute processing according to the received data,
In the power saving state, the power state control means adds the received data during the temporary restoration to the current data when the temporary restoration of the supply of power to the second processing apparatus is repeated intermittently. when that contain packets "no acknowledgment protocol", compared to when no include packets of said received data in time of the temporary return "no acknowledgment protocol", Extend the temporary return time this time,
The power state control means, when the received data currently being temporarily restored does not include a packet of the “protocol for which delivery confirmation is not performed”, the received data currently being temporarily restored to even include packet "protocol for acknowledgment", without extending the time of the current of the temporary restoration,
The power state control means receives the delivery confirmation when the delivery confirmation arrives during a time interval from the end of the temporary return this time in the power saving state to the start of the next temporary return. The next temporary return is performed,
When the delivery confirmation arrives during the time interval from the end of the current temporary return in the power saving state to the start of the next temporary return in the power saving state, the second processing apparatus confirms the delivery confirmation. A power control program for executing transmission of a response packet during the next temporary return, which is executed by the power state control means when it arrives.

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