JPH06334699A - Automatic lan power source controller and remote power-on control method therefor - Google Patents

Abstract

PURPOSE:To improve reliability by turning on the power of a LAN processor on only at the time of reception in a specified time zone. CONSTITUTION:When a device 1 is capable of message reception, a power-on permission end time is not reached and a LAN transmission/reception circuit 16 receives a message addressed to a self MAC address without detecting the power-on, the circuit 16 informs a LAN reception control part 17 and the control part 17 requests analysis to a reception telegraph analysis part 18 when the message is received. As a result, when it can be confirmed that the received messages is addressed to the self MAC address, the analysis part 18 instructs a power-on circuit control part 15 to turn on the power. The control part 15 instructs the power-on circuit 14 to turn on the power of the device 1 and the circuit 14 turns on the power source of the device 1. The control part 15 informs the control part 17 of the power-on state of the device 1 and the control part 17 stops the operation of the circuit 16 and makes the reception of the message impossible. Thus, the power can be turned on only in the specified time zone, the power is not turned on errneously in a time zone when turning on the power causes a trouble and the reliability of control is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a LAN (Local Area N
The present invention relates to a LAN automatic power control device that powers on (remote power on) a power supply of a LAN processing device by a telegram via etwork) and a remote power-on control method thereof.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional system configuration example (A: Example 1, B: Example 2, C: Example 3), FIG. 5 is a configuration diagram of a conventional LAN communication adapter and a LAN automatic power control device, and FIG. Is LA
It is a processing flowchart of the N automatic power supply control device.

4 to 6, 1 is a LAN processing device, 2 is a LAN communication adapter (LAN control device), 3 is a LAN automatic power supply control device, 4 is a transceiver, 5 and 10 are communication control units, and 6 and 12. Is MPU (Micro Processor Unit), 7
Is a LAN transmission / reception control unit, 8 and 16 are LAN transmission / reception circuits,
11 is a power-on / off detection circuit, 13 is a power supply, 14 is a power-on circuit, 15 is a power-on circuit control unit, 17 is a LAN reception control unit, 18 is a received message analysis unit, 19 is a MA.
Indicates a memory for C address (Media Access Control Address).

§1: Description of system configuration example ... See FIG. 4. Hereinafter, a system configuration example on a LAN (Local Area Network) will be described with reference to FIG.

Conventionally, various LAN processing devices (for example, workstations, personal computers, etc.) 1 have been connected to the LAN. When these LAN processing devices 1 are connected to a LAN transmission line, as shown in FIG. 4A, a transceiver 4 and a LAN communication adapter (LAN control device) 2 are used.
Was connected through.

In this case, for example, the LAN communication adapter 2
The LAN processing device 1 is installed in the same housing, or the LAN communication adapter 2, the LAN processing device 1, and the transceiver 4 are installed in the same housing.

By the way, conventionally, as shown in FIG. 4B,
Between the transceiver 4 and the LAN communication adapter 2, or in the LAN communication adapter 2 as shown in FIG.
A system including the N automatic power supply control device 3 has been known.

In this system, the LAN automatic power control device 3 is connected to the LAN transmission line and the LAN processing device 1, and L
The power of the LAN processing device 1 can be remotely turned on (remote power on) by a telegram transmitted via the AN.

§2: Description of Configurations of LAN Communication Adapter and LAN Automatic Power Supply Control Device ... See FIG. 5 An example of the LAN automatic power supply control device will be described below with reference to FIG.

As shown in the figure, a LAN communication adapter 2 and a LAN automatic power supply control device 3 are connected between the LAN processing device 1 and the transmission path. The LAN communication adapter 2 is provided with a communication control unit 5, MPU 6, LAN transmission / reception control unit 7, LAN transmission / reception circuit 8 and the like.

Further, the LAN automatic power control device 3 includes a communication control unit 10, a power on / off detection circuit 11, and an MPU.
12, power supply 13, power-on circuit 14, power-on circuit control unit 15, LAN transmission / reception circuit 16, LAN reception control unit 17, reception message analysis unit 18, MAC address memory 1
9 etc. are provided.

The functions and the like of the above-mentioned respective parts are as follows. (1): The communication control unit 5 controls communication between the LAN processing device 1 and the LAN communication adapter 2.

(2): The MPU 6 is a unit (processor) that performs various controls in the LAN communication adapter 2. (3): The LAN transmission / reception circuit 8 is a circuit that is connected to a LAN transmission line and transmits and receives various types of information (telegrams, etc.).

(4): The LAN transmission / reception control unit 7 is a LAN
The communication adapter 2 controls transmission and reception. (5): The communication control unit 10 includes the LAN processing device 1 and the LAN.
Communication control between the automatic power supply control devices 3 is performed.

(6): Power on / off detection circuit 11
Is a circuit for detecting the power-on or power-off state of the power supply of the LAN processing device 1. (7): The MPU 12 is a unit (processor) that performs various controls in the LAN automatic power control device 3.

(8): The power supply 13 is a power supply device that constantly supplies power to the LAN automatic power supply control device 3 (LAN
The automatic power supply control device 3 is always in a power-on state by the power supply 13.

(9): The power-on circuit 14 is a circuit for performing power-on (power-on) of the power supply of the LAN processing device 1. (10): The power-on circuit controller 15 performs various controls on the power-on circuit 14.

(11): The LAN transmission / reception circuit 16 is an LA
It is a circuit connected to N transmission paths and is a circuit for transmitting and receiving various information (telegrams, etc.). (12): The LAN reception control unit 17 performs various controls at the time of transmission and reception by the LAN transmission / reception circuit 16.

(13): The received message analyzing unit 18 is the LAN
The transmission / reception circuit 16 analyzes an electronic message received. (14): The MAC address memory 19 is M of its own device.
It is a memory that stores an AC address.

The LAN automatic power supply control device 3 configured as described above is always powered by the power supply 13 and is always operating. Further, the power of the LAN processing device 1 can be turned on / off manually by an operator or the like, but in addition to this, the power on control (remote power on) can be performed from a distance by a telegram via the LAN.

§3: Description of processing of LAN automatic power supply control device--see FIG. 6 Hereinafter, processing of the LAN automatic power supply control device will be described based on the processing flowchart of FIG. Note that S1 to S6
Indicates each processing number.

(1): Processing when the LAN processing device is powered off from the operating state in the power-on state Now, the power source of the LAN processing device 1 is in the power-on state,
It is assumed that the LAN processing device 1 is in operation. At this time, my own M
The AC address (MAC address of the own device) is notified from the LAN processing device 1 to the communication control unit 10 of the LAN automatic power control device 3.

This own MAC address is passed to the LAN reception control unit 17, and the LAN reception control unit 17 stores it in the MAC address memory 19. In this state, when the power source of the LAN processing device 1 is turned off (S1), the power-on / off detection circuit 11 detects the power-off state of the LAN processing device 1 and notifies the power-on circuit control unit 15 of it. .

The power-on circuit controller 15 notifies the LAN reception controller 17 that the LAN processor 1 is powered off. Upon receiving this notification, the LAN reception control unit 17
The own MAC address is read from the address memory 19 and set in the LAN transmission / reception circuit 16, and the LAN
The transmission / reception circuit 16 is put into operation.

Thereafter, the LAN transmission / reception circuit 16 causes the MA
The electronic message addressed to the C address is made ready to be received (S2). (2): Processing when the LAN processing device is powered on from the telegram receivable state In the above-mentioned telegram receivable state (S2), the power on / off detection circuit 11 causes the power supply of the LAN processing device 1 to be powered. The on / off state is detected, and the LAN transmission / reception circuit 16 is waiting for reception of a telegram from the outside.

In this state, for example, no message is received,
When the LAN processing device 1 is in the power-on state (S3), the power-on / off detection circuit 11 detects the power-on state of the LAN processing device 1 and notifies the power-on circuit control unit 15 of it.

The power-on circuit controller 15 notifies the LAN reception controller 17 of the power-on state of the LAN processing device 1. LAN reception control unit 17 that received this notification
Causes the LAN transmission / reception circuit 16 to stop operating so that it cannot receive telegrams (S6).

(3): Processing when a message addressed to its own MAC address is received In the above-mentioned message receivable state (S2), for example, L
Without detecting the power-on of the AN processing device 1 (S3),
It is assumed that a message addressed to its own MAC address is received (S4).

In this case, the LAN transmission / reception circuit 16 notifies the LAN reception control unit 17 of the reception of the electronic message. L
Upon receiving the electronic message from the LAN transmission / reception circuit 16, the AN reception control unit 17 requests the received electronic message analysis unit 18 to analyze the electronic message.

The received electronic message analyzing section 18 analyzes the received electronic message. This analysis confirms that the message is addressed to me, not the broadcast message. As a result, when it is confirmed that the received electronic message is addressed to the own MAC address, the power-on circuit control unit 15 is notified of that fact.

Upon receiving this notification, the power-on circuit control unit 15 informs the power-on circuit 14 of the LAN processing device 1.
Power on. The power-on circuit 14 immediately turns on the power supply of the LAN processing device 1 (S
5).

When the LAN processing device 1 is powered on in this way, the power-on / off detection circuit 11 detects the power-on state and notifies the power-on circuit control section 15 to that effect.

The power-on circuit controller 15 notifies the LAN reception controller 17 of the power-on state of the LAN processing device 1. Upon receiving this notification, the LAN reception controller 17
The operation of the AN transmission / reception circuit is stopped to make it impossible to receive the electronic message (S6).

[0034]

SUMMARY OF THE INVENTION The above-mentioned conventional devices have the following problems. : When powering on a power source of a LAN processing device at a distant place by a telegram via a LAN, an arbitrary telegram is generally used.

By the way, in the LAN processing device, confirmation of the device state of the partner system (for example, confirmation of life or death)
There is something that is done by sending a message at regular intervals. When such a LAN processing device exists on the LAN, for example,
If there is a system waiting for the remote power-on of the next day after finishing the work of the day, the LAN processing device is powered on by the above-mentioned message.

That is, the LAN processing device is powered on at a time when it is difficult to power it on, which causes a problem in using the system. : Power-on state as described above (LAN processing unit is powered on at a time when it is difficult to power on)
In order to prevent this, it was also considered to use a message with a specific content (specific message).

However, when using a message with special contents, a special message is created not only for the system to be remotely powered on, but also for the system requesting remote power-on (the sender of the message). It is necessary to have a mechanism for transmitting the data.

Therefore, such a method is not practical because it is not versatile and the system costs high.
The present invention solves such a conventional problem, enables remote power-on of a LAN processing device only during a designated time period, and is erroneously powered on during a time period in which power-on is a problem. The purpose is to prevent things from happening.

[0039]

FIG. 1 is a diagram for explaining the principle of the present invention. In FIG. 1, the same parts as those in FIGS. 5 and 6 are designated by the same reference numerals. Further, 21 is a power-on permission time memory, 22 is a calendar clock control unit, and 23 is a calendar clock.

In order to solve the above problems, the present invention has the following configuration. (1): At least a means for receiving and processing a message transmitted via the LAN (LAN transmission / reception circuit 16, LAN reception control unit 17)
Etc.) and means for controlling power-on (power-on) of the LAN processing device 1 (power-on circuit 14, power-on circuit controller 15, etc.)
In the LAN automatic power control device capable of remote power-on of the N processing device 1, the calendar clock 23 and LA
N means for setting a time at which power-on of the processing device 1 is permitted (power-on permission time), and means for performing remote power-on control based on the set time and the information from the calendar clock 23 (power-on permission time memory 21, a calendar clock control unit 22 and the like) to allow reception of a message addressed to the own MAC address only in a preset specific time zone, and only when the message is received in this time zone, the LA
The N processing apparatus 1 is configured to be in the power-on state.

(2): In the LAN automatic power control device having the configuration (1), remote power-on is possible regardless of whether the electronic message addressed to its own MAC address is an arbitrary electronic message or a specific electronic message.

(3): In the LAN automatic power supply control device of the configuration (1), the power-on permission time (power-on permission time) is the time notified from the LAN processing device 1, and the power-on permission start time. And the power-on permission end time.

(4): At least means for receiving and processing a message transmitted via the LAN (LAN transmission / reception circuit 16, LAN reception control unit 17, etc.), and means for controlling power-on (power-on) of the LAN processing apparatus 1 (power). A remote power-on control method for a LAN automatic power control device, which comprises an on-circuit 14, a power-on circuit controller 15, etc.) and is capable of remote power-on of the LAN processing device 1 by a telegram via the LAN. Time information such as the power-on permission time (power-on permission start time + power-on permission end time) notified from the processing device 1 is set internally, and when: power-off of the LAN processing device 1 is detected,
It is determined whether or not it is a preset power-on permission time (time zone), and if it is not the power-on permission time, it is set in a state in which it is not possible to receive a message, and at the power-on permission time, a message is transmitted via the LAN. In a receivable state, the LAN processing device 1 is configured to be powered on when a message addressed to its own MAC address is received in the receivable state of the above-mentioned telegram.

[0044]

The operation of the present invention based on the above configuration will be described with reference to FIG. (1): Processing when the LAN processing device 1 is powered off from the power-on state When the LAN processing device 1 is in the power-on state, "own MA
The C address, the “current time”, and the “power-on permission time” are notified from the LAN processing device 1 to the communication control unit 10 of the LAN automatic power control device 3.

The LAN reception control unit 17 stores the "own MAC address" in the MAC address memory 19, and the calendar clock control unit 22 sets the "current time" in the calendar clock 23 and the "power-on permission time". Is set in the power-on permission time memory 21.

When the LAN processing device 1 is powered off,
The power-on / off detection circuit 11 detects the power-off state and notifies the power-on circuit control unit 15 of it. The power-on circuit controller 15 notifies the calendar clock controller 22 of power-off. Upon reception of this notification, the calendar clock control unit 22 first checks whether or not the power-on permitted time zone has already been reached, and if it has reached the time zone, the LAN reception control unit 17 is immediately notified of the remote power. Notify the start. If the time zone has not yet been reached, the calendar clock control unit 22 sets data in the calendar clock 23 so that the calendar clock control unit 22 is interrupted at the power-on permission start time.

After that, when the power-on permission start time comes, the calendar clock control unit 22 receives an interrupt from the calendar clock 23 and notifies the LAN reception control unit 17 of the remote power-on start.

At this time, the calendar clock controller 22
When the power-on permission end time is reached, data is set in the calendar clock 23 so that an interrupt is generated in the calendar clock controller 22.

LA notified of start of remote power-on
The N reception control unit 17 reads its own MAC address from the MAC address memory 19 and sets it in the LAN transmission / reception circuit 16, and sets the LAN transmission / reception circuit 16 in the operating state.

Thereafter, the LAN transmission / reception circuit 16 uses the MA
It is ready to receive the message addressed to C address. (2): Processing when the LAN processing device is powered on from the telegram receivable state After the telegram receivable state, the power-on permission end time is not reached and no telegram addressed to the own MAC address is received. ,
If the LAN processing device 1 is powered on,
The power-on / off detection circuit 11 detects the power-on state of the LAN processing device 1 and notifies the power-on circuit control unit 15 of it.

The power-on circuit controller 15 notifies the LAN reception controller 17 of the power-on state of the LAN processing device 1. LAN reception control unit 17 that received this notification
Causes the LAN transmission / reception circuit 16 to stop operating so that the electronic message cannot be received.

(3): Processing when a message addressed to the own MAC address is received In the above-mentioned message receivable state, the power-on permission end time does not come and the power-on of the LAN processing device 1 is not detected, and LAN transmission / reception is performed. It is assumed that the circuit 16 receives a message addressed to its own MAC address.

In this case, the LAN transmission / reception circuit 16 notifies the LAN reception control unit 17 of the reception of the electronic message. LA
Upon receiving the electronic message, the N reception control unit 17 requests the received electronic message analysis unit 18 to analyze the electronic message.

The received electronic message analyzing section 18 analyzes the received electronic message. As a result, if it is confirmed that the received electronic message is addressed to the own MAC address, the received electronic message analysis unit 18
Then, the power-on circuit controller 15 is instructed to power on.

The power-on circuit controller 15 instructs the power-on circuit 14 to power on the LAN processing device 1. The power-on circuit 14 immediately turns on the power supply of the LAN processing device 1.

When the LAN processing device 1 is powered on in this way, the power-on / off detection circuit 11 detects the power-on state and notifies the power-on circuit control section 15 to that effect.

The power-on circuit controller 15 notifies the LAN reception controller 17 of the power-on state of the LAN processing device 1. Upon receiving this notification, the LAN reception controller 17
The operation of the AN transmission / reception circuit is stopped to make it impossible to receive the electronic message.

(4) Description of processing when the power-on permission end time is reached from the message receivable state After the above message receivable state, the LAN processing device 1
Does not power on, does not receive a message addressed to its own MAC address, and the power-on permission end time comes.

In this case, when the power-on permission end time comes, the calendar clock control unit 22 receives an interrupt from the calendar clock 23, and the LAN reception control unit 17 receives the interrupt.
To the end of remote power-on.

The LAN reception control unit 17 which has received this notification
Causes the LAN transmission / reception circuit 16 to stop operating so that the electronic message cannot be received. In this way, LA
When the N processor is remotely powered on, it can be powered on only during a designated time zone, and will not be accidentally powered on during a time zone when it is difficult to power on.

[0061]

Embodiments of the present invention will be described below with reference to the drawings. 2 and 3 are diagrams showing an embodiment of the present invention, FIG. 2 is a configuration diagram of a LAN communication adapter and a LAN automatic power control device, and FIG. 3 is a processing flowchart of the LAN automatic power control device. 2 to 4, the same parts as those in FIGS. 1, 5 and 6 are designated by the same reference numerals.

§1: Description of LAN communication adapter and LAN automatic power supply control device ... See FIG. 2. The LAN communication adapter and LAN automatic power supply control device of this embodiment will be described below with reference to FIG.

As shown in the figure, the LAN processor 1 and the LA
LAN communication adapter 2 and LA are connected between the N transmission line and
N The automatic power control device 3 is connected. The LAN communication adapter 2 is provided with a communication control unit 5, MPU 6, LAN transmission / reception control unit 7, LAN transmission / reception circuit 8 and the like.

Further, the LAN automatic power control device 3 includes a communication control unit 10, a power on / off detection circuit 11, an MPU.
12, power supply 13, power-on circuit 14, power-on circuit control unit 15, LAN transmission / reception circuit 16, LAN reception control unit 17, reception message analysis unit 18, MAC adris memory 1
9, a power-on permission time memory 21, a calendar clock control unit 22, a calendar clock 23 and the like are provided.

The functions and the like of the above-mentioned respective parts are as follows. (1): The communication control unit 5 controls communication between the LAN processing device 1 and the LAN communication adapter 2.

(2): The MPU 6 is a unit (processor) that performs various controls in the LAN communication adapter 2. (3): The LAN transmission / reception circuit 8 is a circuit that is connected to a LAN transmission line and transmits and receives various types of information (telegrams, etc.).

(4): The LAN transmission / reception control unit 7 uses the LAN
The communication adapter 2 controls transmission and reception. (5): The communication control unit 10 includes the LAN processing device 1 and the LAN.
Communication control between the automatic power supply control devices 3 is performed.

(6): Power on / off detection circuit 11
Is a circuit for detecting the power-on or power-off state of the power supply of the LAN processing device 1. (7): The MPU 12 is a unit (processor) that performs various controls in the LAN automatic power control device 3.

(8): The power source 13 is a power source device that constantly supplies power to the LAN automatic power source control device 3 (LAN
The automatic power supply control device 3 is always in a power-on state by the power supply 13.

(9): The power-on circuit 14 is a circuit for performing power-on (power-on) of the power supply of the LAN processing device 1. (10): The power-on circuit controller 15 performs various controls on the power-on circuit 14.

(11): The LAN transmission / reception circuit 16 is the LA
It is a circuit connected to N transmission paths and is a circuit for transmitting and receiving various information (telegrams, etc.). (12): The LAN reception control unit 17 performs various controls at the time of transmission and reception by the LAN transmission / reception circuit 16.

(13): The received message analyzing unit 18 uses the LAN
The transmission / reception circuit 16 analyzes an electronic message received. (14): The MAC address memory 19 is M of its own device.
It is a memory that stores an AC address.

(15): Power-on permission time memory 2
A memory 1 stores the power-on permission time (power-on permission start time and power-on permission end time) sent from the LAN processing device.

(16): Calendar clock controller 22
Controls the calendar clock 23, and performs control during remote power-on control. (17): The calendar clock 23 is a calendar clock used for controlling remote power-on.

The LAN automatic power supply control device 3 configured as described above is always powered by the power supply 13 and is always operating. Further, the power of the LAN processing device 1 can be turned on / off manually by an operator or the like, but in addition to this, the power on control (remote power on) can be performed from a distance by a telegram via the LAN.

§2: Description of processing of LAN automatic power supply control apparatus--see FIG. 3 Hereinafter, processing of the LAN automatic power supply control apparatus will be described based on the processing flowchart of FIG. Note that S11 to S2
2 shows each processing number.

(1): Processing when the LAN processing device is powered off from the operating state in the power-on state Now, the power source of the LAN processing device 1 is in the power-on state,
Suppose it is in operation. At this time, "own MAC address"
And "current time" and "power-on permission time" are LA
The N processing device 1 notifies the communication control unit 10 of the LAN automatic power control device 3.

This "own MAC address" is passed from the communication control unit 10 to the LAN reception control unit 17, and the LAN reception control unit 17 stores it in the MAC address memory 19.
The “current time” and “power-on permission time” are passed from the communication control unit 10 to the calendar clock control unit 22.

Then, the calendar clock controller 22
The “current time” is set in the calendar clock 23, and the “power-on permission time” is set in the power-on permission time memory 21.

The above "power-on permission time" means
For example, the time zone data has a width of "from XX year XX month XX day XX hour XX minute to YY year YY month YY day YY hour YY minute".

That is, the "power-on permission time" is
"Power-on permission start time" (XX year XX month XX day XX
Hour XX minutes) and "Power-on permission end time" (YY year Y
The data is a pair of (Y, YY, YY, YY minutes).

In this state, when the power source of the LAN processing device 1 is turned off (S11), the power-on / off detection circuit 11 detects the power-off state of the LAN processing device 1 and the power-on circuit control unit 15 To notify.

The power-on circuit controller 15 indicates the power-off state of the LAN processing device 1 by the calendar clock controller 22.
To notify. Upon reception of this notification, the calendar clock control unit 22 first checks whether or not the power-on permitted time zone has already been reached, and if it has reached the time zone, the LAN reception control unit 17 is immediately notified of the remote power. Notify the start. If the time zone has not yet been reached, data is set in the calendar clock 23 so that the calendar clock control unit 22 is interrupted at the power-on permission start time.

If the set power-on permission start time has not come (S12), the calendar clock 2
Since the interrupt from 3 to the calendar clock control unit 22 does not occur, the calendar clock control unit 22 does nothing (waits for the generation of the interrupt).

At this time, however, the power on / off detection circuit 11 continues to detect the power on / off state of the LAN processing device 1 (S19). As a result, if the power-on / off detection circuit 11 detects the power-on state of the LAN processing device 1 (S19), the LAN automatic power supply control device 3 turns off the LAN processing device 1 again (S11). Wait for In this case, the message cannot be received.

After that, when the power-on permission start time comes, the calendar clock control unit 22 receives an interrupt from the calendar clock 23. The calendar clock control unit 22 that has received this interrupt notifies the LAN reception control unit 17
To the remote power-on start.

At this time, the calendar clock controller 22
Sets data in the calendar clock 23 so that an interrupt is generated in the calendar clock control unit 22 at the power-on permission end time.

The LAN reception control unit 17 which has been notified of the start of the remote power-on has the MAC address memory 19
Then, the own MAC address is read out and set in the LAN transmission / reception circuit 16, and the LAN transmission / reception circuit 16 is set in the operating state.

Thereafter, the LAN transmission / reception circuit 16 causes the MA
It is ready to receive a message addressed to C address (S1
3). (2): Processing when the LAN processing device is powered on from the telegram receivable state After the telegram receivable state (S13), the calendar clock control unit 22 waits for the power-on permission end time. (Waiting for notification by the interrupt from the calendar clock 23).

Further, the power on / off detection circuit 11 detects the power on / off state of the power supply of the LAN processing device 1, and the LAN transmission / reception circuit 16 is waiting for reception of a telegram from the outside.

In this state, if the power-on permission end time is not reached (S14), no message addressed to the own MAC address is received (S16), and the LAN processing device 1 is in the power-on state (S15), the power-on is performed. / Off detection circuit 11
Detects the power-on state of the LAN processing device 1 and notifies the power-on circuit control unit 15 of it.

The power-on circuit controller 15 notifies the LAN reception controller 17 of the power-on state of the LAN processing device 1. LAN reception control unit 17 that received this notification
Causes the LAN transmission / reception circuit 16 to stop operating so that it cannot receive a telegram (S18).

(3): Processing when a message addressed to its own MAC address is received In the above-mentioned message receivable state (S13), the power-on permission end time does not come (S14), and the LAN processing device 1
It is assumed that the LAN transmission / reception circuit 16 receives a message addressed to its own MAC address without detecting the power-on of (S15) (S16).

In this case, the LAN transmission / reception circuit 16 notifies the LAN reception control section 17 when the electronic message is received. LA
Upon receiving the electronic message from the LAN transmission / reception circuit 16, the N reception control unit 17 requests the received electronic message analysis unit 18 to analyze the electronic message.

The received message analyzing unit 18 analyzes the received message. In this analysis, it is confirmed that the message is not a broadcast message but a message addressed to itself (a message addressed to the own MAC address).

As a result, when it is confirmed that the received electronic message is addressed to the own MAC address, the received electronic message analysis unit 18
Then, the power-on circuit controller 15 is instructed to power on the LAN processing device 1.

The power-on circuit control unit 1 which has received this instruction
5 instructs the power-on circuit 14 to power on the LAN processing device 1. The power-on circuit 14 immediately turns on the power supply of the LAN processing device 1 (S1).
7).

In this way, when the LAN processing device 1 is powered on, the power-on / off detection circuit 11 detects the power-on state and notifies the power-on circuit control unit 15 to that effect.

The power-on circuit controller 15 notifies the LAN reception controller 17 of the power-on state of the LAN processing device 1. Upon receiving this notification, the LAN reception controller 17
The operation of the AN transmission / reception circuit is stopped to make it impossible to receive a telegram (S18).

(4): Description of processing when the power-on permission end time is reached from the message-reception-enabled state After the message-reception-enabled state (S13), the LAN
The processing device 1 does not power on (S15), and its own MAC
It is assumed that the power-on permission end time has come (S14) without receiving a message addressed to the address (S16).

In this case, when the power-on permission end time comes, the calendar clock control unit 22 receives an interrupt from the calendar clock 23. The calendar clock control unit 22 that has received this interrupt, the LAN reception control unit 1
7 is notified of the end of remote power-on.

The LAN reception control unit 17 which has received this notification
Causes the LAN transmission / reception circuit 16 to stop operating so that it cannot receive a telegram (S18). (Other Embodiments) Although the embodiments have been described above, the present invention can be implemented as follows.

The message via the LAN may be an arbitrary message or a specific message. The LAN processing device can be implemented by any processing device such as a workstation or a personal computer.

[0104]

As described above, the present invention has the following effects. : The reception of the electronic message is permitted only at a previously designated time (time zone), and the LAN processing device is powered on only when the electronic message is received at the permitted time.

Therefore, at a time when it is difficult to turn on the power,
The LAN processing device is never powered on, and the reliability of remote power-on control is improved. : Power-on is allowed only at the specified time.
There is no problem whether the message is an arbitrary message or a specific message.

: Remote power-on time is LAN
Since it can be arbitrarily specified from the processing device, operability is also improved.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a configuration diagram of a LAN communication adapter and a LAN automatic power supply control device according to an embodiment.

FIG. 3 is a processing flowchart of a LAN automatic power control device.

FIG. 4 is an example of a conventional system configuration.

FIG. 5 is a configuration diagram of a conventional LAN communication adapter and a LAN automatic power supply control device.

FIG. 6 is a processing flowchart of a conventional LAN automatic power supply control device.

[Explanation of symbols]

 1 LAN processing device 2 LAN communication adapter (LAN control device) 3 LAN automatic power supply control device 10 communication control unit 16 LAN transmission / reception circuit 17 LAN reception control unit 11 power on / off detection circuit 14 power on circuit 15 power on control unit 17 LAN Reception control unit 18 Reception message analysis unit 19 MAC address memory 21 Power-on permission time memory 22 Calendar clock control unit 23 Calendar clock

Claims (4)

[Claims] 1. A LAN comprising at least means (16, 17) for receiving and processing a telegram transmitted via a LAN and means (14, 15) for controlling power-on (power-on) of the LAN processing device (1). In the LAN automatic power control device capable of remote power-on of the LAN processing device (1) by the electronic message via the calendar clock (23) and the time at which the power-on of the LAN processing device (1) is permitted (power-on permission time). ) Is set, and means (21, 22) for controlling the remote power-on according to the set time and the information from the calendar clock (23) is provided, and only the preset specific time zone is addressed to the own MAC address. LAN which is characterized in that the LAN processing device (1) is turned on only when a message is received during this time period. Dynamic power control unit. 2. The LAN automatic power supply control device according to claim 1, wherein the electronic message addressed to the own MAC address enables remote power-on by either an arbitrary electronic message or a specific electronic message. 3. The power-on permission time (power-on permission time) is a time notified from the LAN processing device (1), and includes a power-on permission start time and a power-on permission end time. LA according to claim 1, characterized in that
N Automatic power control device. 4. A LAN comprising at least means (16, 17) for receiving and processing a message transmitted via a LAN and means (14, 15) for controlling power-on (power-on) of the LAN processing device (1). In the LAN automatic power supply control device capable of remote power-on of the LAN processing device (1) by the electronic message via: Power-on permission time (power-on permission start time + power) previously notified from the LAN processing device (1). Time information such as ON permission end time) is internally set, and: When the power off of the LAN processing device (1) is detected,
It is determined whether or not it is a preset power-on permission time (time zone), and if it is not the power-on permission time, it is set in a state in which it is impossible to receive a message, and when the power-on permission time is reached, a message is transmitted via the LAN. In the receivable state of the above-mentioned telegram, when the telegram addressed to its own MAC address is received, the LAN processing device (1) is powered on. Remote power-on control method.