JP3322721B2 - Power-on control method and control device for LAN automatic power control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses an OSI protocol as a LAN protocol, and transmits a message via a LAN (including any relay means such as a WAN-LAN and a message transmitted via a protocol). The present invention relates to a power-on control method and a control device of a LAN automatic power control device for powering on (remote power-on) a LAN processing device.

[0002]

2. Description of the Related Art FIGS. 18 to 20 are views showing a conventional example. In FIGS.
AN communication adapter (LAN control device), 3 is a LAN automatic power control device, 4 is a transceiver, 5 and 10 are communication control units, 6 and 12 are MPU (MicroProcessor Unit), 7 is a LAN transmission and reception control unit, and 8 and 16 are LAN transceiver circuit, 1
1 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, and 17 is L
AN reception control unit, 18 is a received message analysis unit, 19 is MAC
Indicates a memory for an address (Media Access Control Address).

The terms used in the following description are as follows. LAN: Local Area Network, OSI: OpenSystem Interconnec
tion (open system interconnection), WAN: Wide Erea
Network (Wide Area Network), MAC: Media Access Control
(Medium access control), NSAP: Network Service Ac
cess Point (address: network service access point), ESH: End System Hello (End System Hello), ISH: Intermediate System Hello (Intermediate System Hello), PDU: Protocol Da
ta Unit (protocol data unit), DT-NPDU:
Data-NetworkProtcol Data Unit, ES-IS: End System
-Intermediate System (end system-intermediate system).

§1: Description of the system—see FIG. 18 FIG. 18 is an explanatory diagram of a conventional system (A: Example 1, B: Example 2, C: Example 3). Hereinafter, the system on the LAN
This will be described with reference to FIG.

Conventionally, various LAN processing apparatuses (eg, workstations, personal computers, etc.) 1 have been connected to the LAN. When connecting these LAN processing devices 1 to a LAN transmission path, as shown in FIG. 18A, the transceiver 4 and the LAN communication adapter (LAN control device)
2 was connected.

In this case, for example, the LAN communication adapter 2
And the LAN processing device 1 are 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.

Conventionally, as shown in FIG. 18B, a LAN automatic power control device 3 is provided between the transceiver 4 and the LAN communication adapter 2 or in the LAN communication adapter 2 as shown in FIG. 18C. The system was known.

In this system, a LAN automatic power control device 3 is connected to a LAN transmission path and a LAN processing device 1,
The LAN processor 1 can be powered on (remote power on) from a distance by a message via the AN.

§2: Description of system configuration ... FIG.
FIG. 19 is a system configuration diagram of a conventional example. Hereinafter, LAN
An example of a system connected to the system will be described with reference to FIG.

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

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, received message analysis unit 18, MAC address memory 1
9 and the like are provided.

The functions and the like of each of the above sections 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 performs various controls and the like in the LAN communication adapter 2 (processor). (3): The LAN transmission / reception circuit 8 is a circuit that is connected to the LAN transmission path and transmits and receives various information (such as electronic messages).

(4): LAN transmission / reception control unit 7
The communication adapter 2 performs transmission and reception control (for example, a control program). (5): The communication control unit 10 communicates with the LAN processing device 1 and the LAN.
It controls communication between the automatic power control devices 3.

(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 performs various controls in the LAN automatic power control device 3 (processor).

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

(9) The power-on circuit 14 is a circuit for turning on the power of the LAN processing apparatus 1 (turning on the power). (10): The power-on circuit control unit 15 performs various controls on the power-on circuit 14.

(11): The LAN transmission / reception circuit 16
N is a circuit connected to the N transmission lines, and is a circuit for transmitting and receiving various information (telegrams and the like). (12): The LAN reception controller 17 controls various types of LAN reception.

(13): The received message analysis unit 18 is a LAN
The transmission / reception circuit 16 analyzes the message received. (14): The MAC address memory 19 stores the M
This is a memory for storing AC addresses.

The automatic LAN power supply control device 3 configured as described above is always powered on by the power supply 13 and is always operating. The power supply of the LAN processing apparatus 1 can be manually turned on / off by an operator or the like. In addition, the LAN automatic power control apparatus 3 can be used to remotely power on (remote power ON) is possible.

In this example, the LAN processing device 1
, The LAN communication adapter 2 and the LAN automatic power control device 3 constitute a system on the LAN.

§3: Description of Processing of Conventional Example—See FIG. 20 FIG. 20 is a processing flowchart of the conventional example (processing of the LAN automatic power control device). Hereinafter, the processing of the LAN automatic power control device will be described based on the processing flowchart of FIG. In addition, S1 to S6 indicate each processing number.

(1) Processing when the LAN processing apparatus is powered off from a state in which the LAN processing apparatus is operating in the power on state Now, the power supply of the LAN processing apparatus 1 is in the power on state,
It is assumed that the LAN processing device 1 is operating. At this time, own M
AC address (MAC address of own system) is 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 stored in 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.
In this state, when the power of the LAN processing apparatus 1 is turned off, the power on / off detection circuit 11 detects the power off of the LAN processing apparatus 1 (S1) and notifies the power on circuit control unit 15 of the power off. Power-on circuit control unit 15
Notifies the LAN reception control unit 17 that the LAN processing device 1 is powered off.

The LAN reception controller 17 receiving this notification
Reads out its own MAC address from the MAC address memory 19, sets it in the LAN transmission / reception circuit 16, and puts the LAN transmission / reception circuit 16 into an operating state.

Thereafter, the LAN transmitting / receiving circuit 16
A message addressed to the C address is made receivable (S2). (2): Processing when the LAN Processing Apparatus is Powered On from the Message Receivable State In the above-described message receivable state (S2), the power-on / off detection circuit 11 uses the power of the power supply of the LAN processing apparatus 1 The on / off state is detected, and the LAN transmission / reception circuit 16 is waiting for reception of an external message.

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

The power-on circuit control unit 15 notifies the LAN reception control unit 17 of the power-on state of the LAN processing device 1. LAN reception control unit 17 receiving this notification
Puts the LAN transmission / reception circuit 16 into an operation stop state to make it impossible to receive a message (S6).

(3) Processing when a message addressed to the 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 the own MAC address has been received (S4).

In this case, when the LAN transmission / reception circuit 16 receives the message, it notifies the LAN reception control unit 17. L
When receiving the message from the LAN transmission / reception circuit 16, the AN reception control unit 17 requests the received message analysis unit 18 to analyze the message.

The received message analyzer 18 analyzes the received message. In this analysis, it is confirmed that the message is not a broadcast message but is addressed to itself. As a result, when it is confirmed that the received message is addressed to the own MAC address, the power-on circuit control unit 15 is notified to that effect.

When the power-on circuit control unit 15 receives this notification, the power-on circuit 14
Power on. The power-on circuit 14 immediately powers on (powers on) the LAN processing device 1 (S5).

As described above, when the LAN processor 1 is powered on, the power-on / off detection circuit 11 detects the power-on state and notifies the power-on circuit controller 15 of that.

The power-on circuit control unit 15 notifies the LAN reception control unit 17 of the power-on state of the LAN processing device 1. Upon receiving this notification, the LAN reception control unit 17
The operation of the AN transmission / reception circuit is stopped, and reception of a message is disabled (S6).

As described above, when the LAN processing device 1 is powered on, the LAN communication adapter 2 is also powered on from the LAN processing device 1 and operates. Thereafter, the LAN communication adapter 2 controls the LAN.

[0036]

The above-mentioned conventional apparatus has the following problems. OSI ES
-In a protocol such as the IS protocol in which the MAC address of the partner is unknown and the MAC address of the partner is confirmed by exchanging broadcast messages, the message does not reach the partner.

Therefore, as the LAN protocol, the OS
If I is used, a message (WAN-
The power of the LAN processing apparatus cannot be remotely turned on by an arbitrary relay means such as via a LAN or a message transmitted via a protocol).

The present invention solves such a conventional problem. When the own system is an ES, the ESH message is written as:
In the case of IS, an ISH message is transmitted at predetermined intervals,
By notifying other systems on the LAN of the correspondence between the MAC address of the own system and the NSAP address, O
LAN configured by SI ES-IS protocol
It is another object of the present invention to enable remote power-on even in a (or LAN-WAN) system.

[0039]

FIG. 1 is a view for explaining the principle of the present invention. In FIG. 1, the same components as those shown in FIGS. 18 to 20 are denoted by the same reference numerals. Further, CM indicates a transmission / reception unit, PN indicates a power-on control unit, ME indicates a memory, 23 indicates an interval timer control unit, and 25 indicates an interval timer.

The present invention has the following configuration in order to solve the above-mentioned problems. : LA includes at least a transmission / reception unit CM for controlling transmission / reception of a message via a LAN and a power-on control unit PN for controlling power-on (power-on) of the LAN processing apparatus 1;
In a LAN automatic power control device capable of powering on the LAN processing device 1 by a message via N, when the LAN processing device 1 is in a power off (power off) state, a predetermined IS is set at predetermined intervals. E to group address
Send SH message (ESH PDU), and then
When the DT-NPDU message (OSI data message) addressed to the AC address is received, the LAN processing device 1 is powered on by the power-on control unit PN.

In the above configuration, furthermore, the address is set to a preset ES group address and to a preset NS group address.
The power-on control unit PN powers on the LAN processing device 1 when a DT-NPDU message (OSI data message) addressed to the AP address is received.

In the above configuration, furthermore, a destination is set to a preset ES group address and a preset NS is set.
When a DT-NPDU message (OSI data message) addressed to the AP address is received, an ESH message (ESH PD message) is sent to the source MAC address of the DT-NPDU message.
U), and thereafter, the LAN processing device 1 is powered on by the power-on control unit PN.

At least, a transmission / reception unit CM for controlling transmission / reception of a message via the LAN and a power-on control unit PN for controlling power-on (power-on) of the LAN processing apparatus 1 are provided. In a LAN automatic power control device capable of powering on the processing device 1,
When the power of the LAN processing apparatus 1 is in a power-off (power-off) state, an ISH message (ISH PDU) addressed to a predetermined ES group address is transmitted at a predetermined interval, and then addressed to its own MAC address. When the DT-NPDU message (OSI data message) is received, the LAN processing device 1 is powered on by the power-on control unit PN. : For a processing device connected to the transmission path and performing communication processing
In the control device for controlling the power supply, the processing device
In the power-off state, a preset interval
Means for transmitting ESH message addressed to IS group address
Received an OSI message addressed to the MAC address of the processing device.
Communication means, and the processing based on the received OSI message.
Power-on control means for turning on the power of the
Equipped. : For a processing device connected to the transmission path and performing communication processing
In the control device for controlling the power supply, the processing device
In the power-off state, a preset interval
Means for transmitting an ISH message addressed to the ES group address
Received an OSI message addressed to the MAC address of the processing device.
Communication means, and the processing based on the received OSI message.
Power-on control means for turning on the power of the
Equipped.

[0044]

The operation of the present invention based on the above configuration will be described with reference to FIG. (1): When the power supply of the LAN processing apparatus 1 is in a power-on state, “own MAC address”, “own NSAP address (network entity title)”, “IS group address”, “ES group address”, “ESH transmission interval” , And "ISH transmission interval", the data required by the own system (depending on whether the own system is ES or IS) is stored in the memory ME.

In this state, when the LAN processor 1 is powered off, the power-on control unit PN detects the power-off and notifies the transmitting / receiving unit CM. The transmission / reception unit CM that has received the notification sets the transmission / reception unit CM to an operation state and a message receivable state.

At this time, the interval timer control unit 23
Is the specified interval (ESH transmission interval, or I
At the SH transmission interval), data is set in the interval timer 25 so that an interrupt occurs, and the interval timer 25 is started.

(2): From the interval timer 25 started as described above, the interval timer controller 23
When an interrupt occurs, the interval timer control unit 23 notifies the transmission / reception unit CM of an interval request.

In this case, if the own system is ES, the transmitting / receiving unit CM creates an ESH message from the own NSAP address, own MAC address, and IS group address stored in the memory ME, and sends it to the IS group address. Of the ESH is transmitted.

If the own system is an IS, the transmitting / receiving unit CM creates an ISH message from the own MAC address, the ES group address, and the network entity title stored in the memory ME, and sends the ISH message to the ES group address. Send the ISH message.

The ESH or ISH telegram is composed of the E
Transmission is performed at regular intervals according to the SH transmission interval or the ISH transmission interval. By this message transmission, the correspondence between the MAC address of the own system and the NSAP address can be notified to other systems on the LAN.

(3): When the LAN processing device 1 changes from the power-off state to the power-on state, the transmission / reception unit CM sets the state in which the message cannot be received. At this time, in response to a request from the transmission / reception unit CM, the interval timer control unit 23 sets the interval timer 25 to stop operating. Thereafter, the interval timer stops operating.

(4): When the transmission / reception unit CM receives a message in the above-mentioned message receivable state, the received message is analyzed and its contents are confirmed, and control is performed as follows. (4) -1: The transmission / reception unit CM transmits the D to the own MAC address.
When the T-NPDU message is received, the LAN processing device 1 is powered on by the power-on control unit PN after confirming that the message is not a broadcast message but a message addressed to itself (addressed to its own MAC address). .

(4) -2: When the transmission / reception unit CM receives a DT-NPDU message addressed to the own ES group address, the message is a broadcast message and the message is addressed to the own ES group address. After confirming that there are three points, that the message is of the correct OSI protocol, and that the destination NSAP address in the message is equal to the own NSAP address (if the message cannot be confirmed, the message is discarded) The LAN controller 1 is powered on by the ON controller PN.

(4) -3: Also, after confirming in the processing of (4) -2, the ESH message (ESHP) is sent to the source MAC address of the DT-NPDU message.
DU), and then the LAN processing device 1 is powered on by the power-on control unit PN.

As described above, when the own system is ES, the ESH message is transmitted.
Is sent at regular intervals and sent to other systems on the LAN.
By notifying the correspondence between the MAC address of its own system and the NSAP address, it is possible to enable remote power-on even in a LAN (or LAN-WAN) system configured by the OS-ES-IS protocol.

[0056]

Embodiments of the present invention will be described below with reference to the drawings. (Explanation of First Embodiment) FIGS. 2 to 7 show a first embodiment of the present invention. In FIGS. 2 to 7, the same parts as those in FIGS. 1 and 18 to 20 are the same. This is indicated by a reference numeral. Also, 21
Is a LAN transmission / reception control unit, 22 is an ESH transmission interval memory, 24 is an IS group address memory, and 26 is NS
2 shows an AP address memory.

In the first embodiment, the own system is ES and LA
This is an example in which an IS exists on N. §1: Description of connection state of system ... see FIG. 2 FIG. 2 is a system connection diagram of the first embodiment. In this example, each system (ES and IS) is connected as shown in FIG.

As shown in the figure, a plurality of ESs and a plurality of ISs are connected to a LAN.
There is also an ES connected to S. In the present embodiment, it is sufficient that at least one IS connected to the LAN exists. Further, any one of the ESs connected to the LAN may be the own system, and the ES to be the own system may be connected to any position as long as the ES is connected to the LAN. .

§2: Description of system control sequence
FIG. 3 shows a control sequence of the system of the first embodiment. Hereinafter, a control sequence of the system shown in FIG. 2 will be described based on FIG.

In the system shown in FIG. 2, it is assumed that any one ES is its own system. In this case, the own system (ES) sets the MAC address to “γ”, NSAP
Let the address be “ε”.

(1) It is assumed that the own system (ES) is in a power-off (power-off) state and a remote power-on standby state. At this time, the own system (ES) monitors the time with an interval timer (described later),
An ESH telegram (ESH-PDU) is transmitted at regular intervals. In this case, the destination is the IS group address (I
S Gr address).

Since the ESH message (ESH-PDU) is addressed to the IS group address, it is received by another system (IS). Other systems (IS)
In the ESH message (ESH-PDU), the MAC
Addresses can be associated with NSAP addresses.

Therefore, in the other system (IS) that has received the ESH message, the data corresponding to the MAC address and the NSAP address is stored in the memory (memory in the LAN communication adapter), and the subsequent processing is performed. Use.

(2): It is assumed that a message is transmitted from another system (ES) to the NSAP address ε. In addition, a message from the other system (ES) (NSAP address ε
After being received by the other system (IS), the destination γ (MA of the own system) is further received from the other system (IS).
C address), the DT-NPDU message (OSI
Is transmitted (relayed).

In this case, the correspondence between the NSAP address ε and the destination γ is possible by the data stored in the memory of the other system (IS). Thereafter, the own system (ES) that has received the message of the DT-NPDU (destination γ) from the other system (IS) turns on the LAN processing device.

Before the self-system (ES) completely returns to the operation state, when the self-system (ES) does not return a response to the DT-NPDU, the DT-N has a predetermined number of times defined in the system. The NPDU is retransmitted from another system (IS or ES).

§3: Description of the System—See FIG. 4 FIG. 4 is a system configuration diagram of the first embodiment. Hereinafter, an example of the own system (ES) will be described with reference to FIG.

The self system (ES) is, for example, LA
An N processing device 1, a LAN communication adapter 2, a LAN automatic power control device 3, and the like. A LAN communication adapter 2 and a LAN automatic power control device 3 are connected between the LAN processing device 1 and the LAN transmission path.

The LAN communication adapter 2 includes a communication control unit 5, an MPU 6, a LAN transmission / reception control unit 7, a LAN transmission / reception circuit 8, and the like. In addition, the LAN automatic power control device 3 includes a communication control unit 10, a power on / off detection circuit 1
1, MPU 12, power supply 13, power-on circuit 14, power-on circuit control unit 15, LAN transmission / reception circuit 16, received message analysis unit 18, MAC address memory 19, LAN transmission / reception control unit 21, ESH transmission interval memory 22, interval A timer control unit 23, an IS group address memory 24, an interval timer 25, an NSAP address memory 26, and the like are provided.

The functions and the like of each of the above sections 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 performs various controls and the like in the LAN communication adapter 2 (processor). (3): The LAN transmission / reception circuit 8 is a circuit that is connected to the transmission line of the LAN and performs transmission and reception of various information (telegrams and the like).

(4): The LAN transmission / reception control unit 7
The communication adapter 2 controls transmission and reception. (5): The communication control unit 10 communicates with the LAN processing device 1 and the LAN.
It controls communication between the automatic power control devices 3.

(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 performs various controls in the LAN automatic power control device 3 (processor).

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

(9) The power-on circuit 14 is a circuit for turning on the power of the LAN processing apparatus 1 (turning on the power). (10): The power-on circuit control unit 15 performs various controls on the power-on circuit 14.

(11): The LAN transmission / reception circuit 16
This is a circuit connected to the N transmission lines, and is a circuit for transmitting and receiving various information (telegrams and the like). (12): The received message analysis unit 18 is the LAN transmission / reception circuit 1
The message received in step 6 is analyzed.

(13): MAC address memory 19
Is a memory for storing the MAC address of the own device. (14) The LAN transmission / reception control unit 21 is connected to the LAN transmission path, and performs various controls at the time of transmission and reception at the LAN transmission / reception circuit 16.

(15): ESH transmission interval memory 22
Is a memory for storing ESH transmission interval data. (16): The IS group address memory 24 stores the IS
This is a memory for storing group addresses.

(17): The interval timer 25 sends the interval timer control unit 23 at regular intervals based on the set data (ESH transmission interval data).
This is a timer that generates an interrupt.

(18): NSAP address memory 26
Is a memory for storing the NSAP address. The LAN automatic power control device 3 configured as described above,
The power is always turned on by the internal power supply 13 and is always operating.

The power supply of the LAN processing apparatus 1 can be turned on / off manually by an operator or the like. In addition, remote power-on can be performed by a message via the LAN.

Further, the power supply of the LAN communication adapter 2 is L
The LAN communication adapter 2 operates by being supplied with power from the AN processing device 1, and performs LAN communication control only while the LAN processing device 1 is operating.

The other system (IS) and the other system (ES) may have the same configuration as that of the own system (ES), or may have a different configuration. The transmission / reception unit CM shown in FIG.
N corresponding to the N transmission / reception control unit 21, the received message analysis unit 18, etc.
The power-on control unit PN corresponds to the power-on circuit 14, the power-on circuit control unit 15, the power-on / off detection circuit 11, and the like.

§4: Description of the processing of the LAN automatic power supply control device ... refer to FIGS. 5 to 7. FIG. 5 is a processing flowchart 1 (power on → power off → ESH transmission) of the first embodiment, and FIG. FIG. 7 is a processing flowchart 2 (power off → own M) of the first embodiment.
AC-address-addressed message reception).

Hereinafter, the processing of the LAN automatic power control device provided in the own system (ES) will be described with reference to the processing flowcharts of FIGS. Note that S11 to S36
Indicates each processing number.

(1): Processing when the LAN processing apparatus is turned off from the power-on state--see FIG. 5 Now, the power supply of the LAN processing apparatus 1 is in the power-on state.
It is assumed that it is running. At this time, the "own MAC address"
, The “own NSAP address”, the “IS group address”, and the “ESH transmission interval” are notified from the LAN processing device 1 to the communication control unit 10 of the LAN automatic power control device 3.

Thereafter, the “own MAC address”
"Local NSAP address" and "IS group address"
And each data of the “ESH transmission interval” is transmitted to the communication control unit 10.
Is passed to the LAN transmission / reception control unit 21, and the LAN transmission / reception control unit 21 stores the data in each memory (S11).

That is, the “own MAC address” is the MAC
The "own NSAP address" is stored in the NSAP address memory 26, and the "IS
"Group address" is IS group address memory 2.
4 and the “ESH transmission interval” is stored in the ESH transmission interval memory 22.

In this state, when the power of the LAN processing device 1 is turned off (power is turned off), the power on / off detection circuit 11 detects the power off of the LAN processing device 1 (S1).
2) Notify the power-on circuit control unit 15.

The power-on circuit control unit 15 notifies the LAN transmission / reception control unit 21 that the LAN processing device 1 has been turned off. The LAN transmission / reception control unit 21 that has received the notification reads the MAC address from the MAC address memory 19, sets the MAC address in the LAN transmission / reception circuit 16, and sets the LAN transmission / reception circuit 16 to the operating state.

Thereafter, the LAN transmission / reception circuit 16
A message addressed to the AC address can be received (S1
3). At this time, the LAN transmission / reception control unit 21 makes an interval notification request to the interval timer control unit 23. As an interval value of this request, the interval timer control unit 23 stores the ESH transmission interval memory 2
The ESH transmission interval (data) read out from No. 2 is passed.

Upon receiving the interval notification request, the interval timer control unit 23 sets the interval timer 2 so that an interrupt occurs at the designated interval.
5, the data (ESH transmission interval) is set, and the interval timer 25 is started (S14).

Thereafter, the interval timer control unit 23
Wait for an interrupt from the interval timer 25. (2): An interrupt is generated from the interval timer and E
Processing when SH message is transmitted: see FIG. 5 When an interrupt occurs from the interval timer 25 started as described above to the interval timer control unit 23 (S15), the interval timer control unit 23
Notifies the LAN transmission / reception control unit 21 of an interval request.

In this case, the interval timer 25 generates an interrupt to the interval timer control unit 23 at a constant interval unless the stop setting is performed. Thereafter, upon receiving the interval request, the LAN transmission / reception control unit 21 uses the own NSAP address, own MAC address, and IS group address stored in the memory
An SH telegram is created and transmitted from the LAN transmission / reception circuit 16 (S16).

(3): Processing when the power of the LAN processing apparatus is changed from power off to power on: see FIG. 6 When the LAN processing apparatus 1 changes from the power off state to the power on state, this state is reached. Is detected by the power-on / off detection circuit 11 (S21) and notified to the power-on circuit control unit 15. The power-on circuit control unit 15 notifies the LAN transmission / reception control unit 21 that the LAN processing device 1 has been turned on.

The LAN transmission / reception control unit 21 receiving this notification
Sets the LAN transmission / reception circuit 16 to the operation stop state (S2
2). Thereafter, the LAN transmission / reception circuit 16 does not receive a message from the LAN transmission path.

At this time, the LAN transmission / reception control unit 21
An interval timer stop request is issued to the interval timer control unit 23. Upon receiving the interval timer stop request, the interval timer control unit 23 sets the interval timer 25 to stop the operation (S2).
3). Thereafter, the interval timer stops operating.

(4): Processing when a message addressed to the own MAC address is received after power-off--see FIG. 7 When the LAN transmission / reception circuit 16 receives a message in the above-mentioned message receivable state (S31), the message is sent. LA received
Notify the N transmission / reception control unit 21.

The LAN transmission / reception control unit 21 receiving this notification
Receives the message received from the LAN transmission / reception circuit 16 and passes it to the received message analysis unit 18. Received message analyzer 18
Analyzes the received message (S32) and checks the following items.

The message is not a broadcast message but a message addressed to itself (addressed to its own MAC address). : Message of correct OSI protocol.

The destination NSAP address in the message is
Be equal to own NSAP address. When the above items are confirmed (S33), the received message analysis unit 18 instructs the power-on circuit control unit 15 to power on the LAN processing device 1.

In the above-mentioned confirmation items, the OS
It is a strict check of the I protocol, and it is better not to perform the check in order to enable power-on with other protocols.

In response to the power-on instruction, the power-on circuit control unit 15 instructs the power-on circuit
The power-on of the N processing device 1 is instructed. Thereafter, the power-on circuit 14 powers on the LAN processor 1 (S34).

Thereafter, when the LAN processor 1 enters the power-on state, the power-on / off detection circuit 11 detects power-on and notifies the power-on circuit control unit 15. The power-on circuit control unit 15 having received the notification notifies the LAN transmission / reception control unit 21 that the LAN processing device 1 has been turned on.

The LAN transmission / reception controller 21 receiving this notification
Then, the operation of the LAN transmitting / receiving circuit 16 is stopped. Thereafter, the LAN transmission / reception circuit 16 does not receive a message from the transmission path (S35).

At this time, the LAN transmission / reception control unit 21
Issues an interval timer stop request to the interval timer control unit 23. Upon receiving the interval timer stop request, the interval timer control unit 23 sets the operation of the interval timer 25 to stop (S3).
6). Thereafter, the operation of the interval timer stops.

(Explanation of Second Embodiment) FIGS. 8 to 13 are views showing a second embodiment of the present invention.
1 to 7 and FIGS. 18 to 20 are denoted by the same reference numerals. Reference numeral 28 denotes an ES group address memory.

In the second embodiment, the own system is ES and LA
This is an example in which IS does not exist on N. §1: Description of connection state of system ... see FIG. 8 FIG. 8 is a system connection diagram of the second embodiment. In this example, a plurality of ESs are connected on the LAN, but no IS exists.

That is, in this example, ES on the LAN
Is intended for networks where only exists. In addition,
The ES that is the own system is the ES connected to the LAN.
Then, it may be connected to any position.

§2: Description of system control sequence
FIG. 9 shows a control sequence 1 of the system of the second embodiment.
Hereinafter, the control sequence of the system shown in FIG.
It will be described based on.

In this example, in the system shown in FIG. 8, one of the ESs is its own system and the other ESs
Becomes another system. In this case, the MAC address of the own system (ES) is set to “γ”, and the M
The AC address is “δ”.

(1): Now, for example, the own system (ES)
However, it is assumed that the power is off (power off) and remote power on is on standby. At this time, the own system (E
In S), the time is monitored by the interval timer, and an ESH message is transmitted at regular intervals. In this case, the destination is an IS group address (IS Gr address).

The reason why the ESH message is transmitted to the IS group address is because it is not known whether the IS exists on the LAN or not. However, in this example, LAN
Since there is no IS above, the message is discarded.

(2): It is assumed that a message is transmitted from another system (ES) in response to a communication request (for communication). In this case, a message of the DT-NPDU whose destination is the ES group address (ESGr address) is transmitted (because the destination γ is not known).

When the own system (ES) receives a message addressed to the own ES group address, it analyzes the message. As a result, if the NSAP address, which is the destination of the received DT-NPDU message, is its own NSAP address (details will be described later), the ESH message (destination:
δ) is returned.

Thereafter, in the own system (ES), the LAN
The power of the LAN processing device is turned on by the automatic power supply control device. In the other system (ES) that has received the returned ESH message, the MAC address and the NSAP address can be associated with the ESH message, so that the transmission message (DT-NPDU) is transmitted to the own system (ES). You can confirm that it was received. After that, other systems (E
S) transmits a message of DT-NPDU (destination γ).

Before the self-system (ES) does not return a response to the DT-NPDU before the self-system (ES) completely enters the operation state, the above-described number of times defined in the system in advance is used. DT-NPDU is compatible with other systems (E
Retransmitted from S).

§3: Description of System—See FIG. 10 FIG. 10 is a system configuration diagram of the second embodiment. Hereinafter, an example of the own system (ES) will be described with reference to FIG.

The own system (ES) is, for example, LA
An N processing device 1, a LAN communication adapter 2, a LAN automatic power control device 3, and the like. A LAN communication adapter 2 and a LAN automatic power control device 3 are connected between the LAN processing device 1 and the LAN transmission path.

The LAN communication adapter 2 includes a communication control unit 5, an MPU 6, a LAN transmission / reception control unit 7, a LAN transmission / reception circuit 8, and the like. In addition, the LAN automatic power control device 3 includes a communication control unit 10, a power on / off detection circuit 1
1, MPU 12, power supply 13, power-on circuit 14, power-on circuit control unit 15, LAN transmission / reception circuit 16, received message analysis unit 18, MAC address memory 19, LAN transmission / reception control unit 21, ESH transmission interval memory 22, interval A timer control unit 23, an IS group address memory 24, an interval timer 25, an NSAP address memory 26, and an ES group address memory 28 are provided.

The ES group address memory 28
Is a memory for storing an ES group address. The configuration other than the ES group address memory 28 is as follows.
The description is omitted because it is the same as the first embodiment.

§4: Description of the processing of the LAN automatic power supply control device ... refer to FIGS. 11 and 12. FIG. 11 is a processing flowchart 1 (power on → power off → ESH transmission) of the second embodiment, and FIG. It is a processing flowchart 2 (power off → power on) of the second embodiment.

Hereinafter, the L provided in the own system (ES) will be described.
The processing of the AN automatic power control device will be described. Note that the same processing flowchart as in the first embodiment is omitted. In addition, S41 to S57 indicate each processing number.

(1): Processing when the LAN processing apparatus is powered off from the power-on state--see FIG. 11 Now, the power supply of the LAN processing apparatus 1 is in the power-on state
It is assumed that it is running. At this time, the "own MAC address"
, The “own NSAP address”, the “IS group address”, the “ES group address”, and the “ESH transmission interval” are notified from the LAN processing device 1 to the communication control unit 10 of the LAN automatic power control device 3. Is done.

Thereafter, the "own MAC address"
"Local NSAP address" and "IS group address"
, “ES group address”, and “ESH transmission interval”
Are transmitted from the communication control unit 10 to the LAN transmission / reception control unit 21, and the LAN transmission / reception control unit 21 stores the data in each memory (S41).

That is, the “own MAC address” is the MAC
The "own NSAP address" is stored in the NSAP address memory 26, and the "IS
Group address "IS group address memory 24
The “ES group address” is stored in the ES group address memory 28, and the “ESH transmission interval” is
It is stored in the SH transmission interval memory 22.

In this state, when the power of the LAN processing apparatus 1 is turned off (power is turned off), the power on / off detection circuit 11 detects the power off (S42) and notifies the power on circuit control unit 15.

The power-on circuit control section 15 notifies the LAN transmission / reception control section 21 that the LAN processor 1 has been powered off. The LAN transmission / reception control unit 21 that has received the notification reads the MAC address from the MAC address memory 19, sets the MAC address in the LAN transmission / reception circuit 16, and sets the LAN transmission / reception circuit 16 to the operating state. Thereafter, a message addressed to the MAC address can be received (S43).

At this time, the LAN transmission / reception control unit 21
An interval notification request is made to the interval timer control unit 23. The interval timer control unit 23 passes the ESH transmission interval (data) read from the ESH transmission interval memory 22 as the value of the interval of this request.

Upon receiving the interval notification request, the interval timer control unit 23 sets the interval timer 2 so that an interrupt occurs at the designated interval.
5, the data (ESH transmission interval) is set, and the interval timer 25 is started (S44).

Thereafter, the interval timer control unit 23
Wait for an interrupt from the interval timer 25. (2): An interrupt is generated from the interval timer and E
Processing when transmitting SH telegram—See FIG. 11 When an interrupt occurs from the interval timer 25 to the interval timer control unit 23 (S45),
The interval timer control unit 23 notifies the LAN transmission / reception control unit 21 of an interval request.

In this case, the interval timer 25 generates an interrupt to the interval timer control unit 23 at fixed intervals unless the stop setting is performed.
Thereafter, the LAN transmission / reception control unit 21 receiving the interval request creates an ESH message from the own NSAP address, the own MAC address, and the IS group address stored in the memory, and transmits the ESH message from the LAN transmission / reception circuit 16 (S
46).

(3): Processing when the power supply of the LAN processing device is changed from power off to power on When the LAN processing device 1 changes from the power off state to the power on state, this state becomes the power on / off state. The detection circuit 11 detects and notifies the power-on circuit control unit 15.

The power-on circuit control section 15 notifies the LAN transmission / reception control section 21 that the LAN processor 1 has been turned on. The LAN transmission / reception control unit 21 that has received the notification puts the LAN transmission / reception circuit 16 into an operation stop state. Thereafter, the LAN transmission / reception circuit 16 does not receive a message from the LAN transmission path.

At this time, the LAN transmission / reception control unit 21
An interval timer stop request is issued to the interval timer control unit 23. Upon receiving the interval timer stop request, the interval timer control unit 23 sets the interval timer 25 to stop operating. Thereafter, the interval timer stops operating.

(4) Processing when a message addressed to its own MAC address is received When the LAN transmission / reception circuit 16 receives a message in the above-mentioned message receivable state, the LAN transmission / reception control unit 21 is notified that the message has been received. I do.

The LAN transmission / reception control unit 21 receiving this notification
Receives the message received from the LAN transmission / reception circuit 16 and passes it to the received message analysis unit 18. Received message analyzer 18
Analyzes the received message and confirms the following items.

The message is not a broadcast message but a message addressed to itself (addressed to its own MAC address). : Message of correct OSI protocol.

The destination NSAP address in the message is
Be equal to own NSAP address. When the above items are confirmed, the received message analyzing unit 18
Instructs the power-on circuit control unit 15 to power on the LAN processor 1.

[0140] Note that, among the items to be confirmed, the OS
It is a strict check of the I protocol, and it is better not to perform the check in order to enable power-on with other protocols.

In response to the power-on instruction, the power-on circuit control unit 15 sends the power-on circuit 14
The power-on of the N processing device 1 is instructed. Thereafter, the power-on circuit 14 powers on the LAN processor 1.

Thereafter, when the LAN processor 1 enters the power-on state, the power-on / off detection circuit 11 detects the power-on and notifies the power-on circuit control unit 15. The power-on circuit control unit 15 having received the notification notifies the LAN transmission / reception control unit 21 that the LAN processing device 1 has been turned on.

The LAN transmission / reception control unit 21 receiving this notification
Then, the operation of the LAN transmitting / receiving circuit 16 is stopped. Thereafter, the LAN transmission / reception circuit 16 does not receive a message from the transmission path.

At this time, the LAN transmission / reception control unit 21
Issues an interval timer stop request to the interval timer control unit 23. Upon receiving the interval timer stop request, the interval timer control unit 23 sets the interval timer 25 to stop operating. Thereafter, the operation of the interval timer stops.

(5): Processing when a message addressed to the own ES group is received: see FIG. 12 When a message addressed to the own ES group is received in a state in which the message can be received, the following is performed. Perform the processing.

When the LAN transmission / reception circuit 16 receives a message (S51), it notifies the LAN transmission / reception control unit 21 that the message has been received. The LAN transmission / reception control unit 21 receiving this notification receives the message received from the LAN transmission / reception circuit 16 and passes the message to the received message analysis unit 18.

The received message analyzer 18 analyzes the received message (S52) and checks the following items. : The message is a broadcast message and a message addressed to the own ES group.

: Message of correct OSI protocol (DT
-NPDU). : The destination NSAP address in the message is equal to the own NSAP address. The received message analysis unit 18 checks the above items and if any of the checks fails, discards the message.

If all of the above are passed (S53), the sender's M
The AC address (δ) is extracted, and an ESH message is transmitted to the MAC address δ (returned to another system) (S5).
4).

After that, the received message analyzer 18 instructs the power-on circuit controller 15 to power on the LAN processor 1. In response to this power-on instruction, the power-on circuit control unit 15 sends L
The power on of the AN processor 1 is instructed. Thereafter, the power-on circuit 14 powers on the LAN processing device 1 (S55).

When the LAN processor 1 enters the power-on state, the power-on / off detection circuit 11 detects power-on and notifies the power-on circuit control unit 15 of the power-on / off detection. The power-on circuit control unit 15 having received the notification notifies the LAN transmission / reception control unit 21 that the LAN processing device 1 has been turned on.

The LAN transmission / reception control unit 21 receiving this notification
Then, the operation of the LAN transmitting / receiving circuit 16 is stopped. Thereafter, the LAN transmission / reception circuit 16 does not receive the message from the transmission path (S56).

At this time, the LAN transmission / reception control unit 21
Issues an interval timer stop request to the interval timer control unit 23. Upon receiving the interval timer stop request, the interval timer control unit 23 sets the interval timer 25 to stop operating. Thereafter, the operation of the interval timer stops (S57).

§5: Processing example in which a message addressed to own ES groove is received and ESH is not returned (modification)
Description: See FIG. 13 FIG. 13 shows a control sequence 2 of the second embodiment. Less than,
In the above processing of the second embodiment, a processing example in which a message addressed to the own ES groove is received and the ESH is not returned is described below.
This will be described with reference to FIG.

(1): Now, for example, the own system (ES)
However, it is assumed that the remote power-on (power-off) state is on standby for remote power-on. At this time, the own system (E
In S), the time is monitored by the interval timer, and an ESH message is transmitted at regular intervals. In this case, the destination is an IS group address (IS Gr address).

After that, it is assumed that a message is transmitted from another system (ES) in response to a communication request (for communication).
In this case, the destination is the ES group address (ES Gr
Address) DT-NPDU.

When the own system (ES) receives a message addressed to the own ES group address, it analyzes the message. As a result, if the NSAP address, which is the destination of the message of the received DT-NPDU, is the own NSAP address, the LAN automatic power control device turns on the LAN processing device (in this case, FIG. 9). MA
The ESH message is not returned to the C address δ).

Before the self-system (ES) completely returns to the operation state, when the self-system (ES) does not return a response to the DT-NPDU, the above-described number of times defined in the system is used. The DT-NPDU (destination: ES group address) is retransmitted from another system (ES).

(2) In the above control, the LAN automatic power control device of the own system (ES) performs the following processing. When the LAN transmitting / receiving circuit 16 receives the message,
The reception of the message is notified to the LAN transmission / reception control unit 21. Upon receiving this notification, the LAN transmission / reception control unit 21
The message received from the AN transmission / reception circuit 16 is received and passed to the received message analysis unit 18.

The received message analyzer 18 analyzes the received message and confirms the following items. : The message is a broadcast message and addressed to the own ES groove. : Message of correct OSI protocol (DT-NPDU)
That.

: The destination NSAP address in the message is
Be equal to own NSAP address. The received message analysis unit 18 checks the above items and if any of the checks fails, discards the message.

If the check passes all of the above, the received message analyzer 18 instructs the power-on circuit controller 15 to power on the LAN processor 1.

In response to the power-on instruction, the power-on circuit control unit 15 sends the power-on circuit 14 an LA
The power-on of the N processing device 1 is instructed. Thereafter, the power-on circuit 14 powers on the LAN processor 1.

When the LAN processor 1 enters the power-on state, the power-on / off detection circuit 11 detects power-on and notifies the power-on circuit controller 15 of the power-on / off detection. The power-on circuit control unit 15 having received the notification notifies the LAN transmission / reception control unit 21 that the LAN processing device 1 has been turned on.

The LAN transmission / reception control unit 21 receiving this notification
Then, the operation of the LAN transmitting / receiving circuit 16 is stopped. Thereafter, the LAN transmission / reception circuit 16 does not receive a message from the transmission path.

At this time, the LAN transmission / reception control unit 21
Issues an interval timer stop request to the interval timer control unit 23. Upon receiving the interval timer stop request, the interval timer control unit 23 sets the interval timer 25 to stop operating. Thereafter, the operation of the interval timer stops.

In this case, since the DT-NPDU is retransmitted, traffic on the LAN increases.
The configuration of the AN transmission / reception control unit 21 can be somewhat simplified.

(Explanation of the Third Embodiment) FIGS.
FIG. 14 is a view showing a third embodiment of the present invention, and FIGS.
The same parts in FIGS. 1 to 13 and FIGS. 18 to 20 are denoted by the same reference numerals. Reference numeral 29 denotes an ISH transmission interval memory.

The third embodiment is an example in which the own system is an IS. §1: Description of connection state of system ... see FIG. 14 FIG. 14 is a system connection diagram of the third embodiment. In this example, each system (ES and IS) is connected as shown in FIG.

As shown in the figure, a plurality of ESs and a plurality of ISs are connected to the LAN.
There is also an ES connected to S. In the present embodiment, any one of the ISs connected to the LAN is used.
Should be its own system.
As long as the IS is connected to the LAN, it may be connected to any position.

In this case, for example, the own system is an IS, but this own IS may be an ES at the same time. That is, in addition to relaying as an IS, a message may be transmitted as an ES. If the own system is not a relay-only machine, the IS is often also the ES at the same time.

In such a case, the L of the own system (IS)
In the AN automatic power control device, the L of the first and second embodiments is used.
The configuration of the AN automatic power control device may be the same as the configuration of the third embodiment described below.

§2: Description of system control sequence
FIG. 15 shows a control sequence of the system according to the third embodiment.
Hereinafter, the control sequence of the system shown in FIG.
5 will be described.

In the system shown in FIG. 14, it is assumed that any one IS is its own system. In this case, the own system (IS) sets the MAC address to “γ”, and the other system (ES) sets the MAC address to “δ”.

(1): It is assumed that the own system (IS) is in a power-off (power-off) state and a remote power-on standby state. At this time, the own system (IS) monitors the time with an interval timer and transmits an ISH message (ISH-PDU) at regular intervals. In this case, the destination is the ES group address (ES Gr address).

Since the ISH message (ISH-PDU) is addressed to the ES group address, it is received by the other system (ES). Other systems (ES)
Then, the MAC address (γ) of the IS can be known from the ISH message (ISH-PDU).

(2): Assume that a message is transmitted from another system (ES) in response to a communication request. The message at this time is a message of DT-NPDU (destination: γ).
After that, the own system (IS) that has received the message of the DT-NPDU (destination γ) from the other system (ES),
The LAN processing device is powered on by the AN automatic power control device. After this power-on, the own system (IS)
Then, start the relay.

Before the self-system (IS) completely returns to the operation state, when the self-system (IS) does not return a response to the DT-NPDU, the number of times defined by the system in advance is equal to the number of DT-NPDUs. The NPDU is retransmitted from another system (ES).

§3: Description of the System—See FIG. 16 FIG. 16 is a system configuration diagram of the third embodiment. Hereinafter, an example of the self system (IS) will be described with reference to FIG.

The own system (IS) is, for example, LA
An N processing device 1, a LAN communication adapter 2, a LAN automatic power control device 3, and the like. A LAN communication adapter 2 and a LAN automatic power control device 3 are connected between the LAN processing device 1 and the LAN transmission path.

The LAN communication adapter 2 includes a communication control unit 5, an MPU 6, a LAN transmission / reception control unit 7, a LAN transmission / reception circuit 8, and the like. In addition, the LAN automatic power control device 3 includes a communication control unit 10, a power on / off detection circuit 1
1, MPU 12, power supply 13, power-on circuit 14, power-on circuit control unit 15, LAN transmission / reception circuit 16, received message analysis unit 18, MAC address memory 19, LAN transmission / reception control unit 21, interval timer control unit 23, interval timer 25, an NSAP address (network entity title) memory 26, an ES group address memory 28, an ISH transmission interval memory 29, and the like.

The ISH transmission interval memory 29 stores the IS
This is a memory for storing the transmission interval of H. The configuration other than the ISH transmission interval memory 29 is the same as that of the first embodiment and the second embodiment, and the description is omitted.

§4: Description of the processing of the LAN automatic power supply control device--see FIG. 17 FIG. 17 is a processing flowchart (power on → power off → ISH transmission) of the third embodiment. Hereinafter, the processing of the LAN automatic power control device provided in the own system (IS) will be described.

The same processing flowchart as in the first and second embodiments is omitted. In addition, S61 to S66 indicate each processing number. (1): Processing when the LAN processing apparatus is turned off from the power-on state ... see FIG. 17 Now, the power supply of the LAN processing apparatus 1 is in the power-on state.
It is assumed that it is running. At this time, the "own MAC address"
, “ES group address”, “own NSAP address (network entity title)”, and “IS
"H transmission interval" is notified from the LAN processing device 1 to the communication control unit 10 of the LAN automatic power control device 3.

Thereafter, the "own MAC address"
“ES group address”, “own NSAP address (network entity title)”, and “ISH”
Each data of the “transmission interval” is transmitted from the communication control unit 10 to the LAN.
The data is passed to the transmission / reception control unit 21, and the LAN transmission / reception control unit 21 stores the data in each memory (S61).

That is, “own MAC address” is MAC
The “ES group address” is stored in the ES group address memory 28,
The “own NSAP address (network entity title)” is stored in the own NSAP address (network entity title) memory 26, and the “ISH transmission interval” is stored in the ISH transmission interval memory 29.

In this state, when the power of the LAN processing device 1 is turned off (power is turned off), the power on / off detection circuit 11 detects the power off of the LAN processing device 1 (S6).
2) Notify the power-on circuit control unit 15.

The power-on circuit control section 15 notifies the LAN transmission / reception control section 21 that the LAN processor 1 has been powered off. The LAN transmission / reception control unit 21 that has received the notification reads the MAC address from the MAC address memory 19, sets the MAC address in the LAN transmission / reception circuit 16, and sets the LAN transmission / reception circuit 16 to the operating state.

Subsequently, the LAN transmission / reception circuit 16
A message addressed to the AC address can be received (S6
3). At this time, the LAN transmission / reception control unit 21 makes an interval notification request to the interval timer control unit 23. As an interval value of this request, the interval timer control unit 23 stores the ISH transmission interval memory 2
The ISH transmission interval (data) read from step 9 is passed.

Upon receiving the interval notification request, the interval timer control unit 23 sets the interval timer 2 so that an interrupt occurs at the designated interval.
5, the data (ISH transmission interval) is set, and the interval timer 25 is started (S64).

Thereafter, the interval timer control unit 23
Wait for an interrupt from the interval timer 25. (2): An interrupt is generated from the interval timer and I
Processing for transmitting SH telegram—See FIG. 17 When the interval timer 25 started as described above causes an interrupt to the interval timer control unit 23 (S65), the interval timer control unit 23
Notifies the LAN transmission / reception control unit 21 of an interval request.

In this case, the interval timer 25 generates an interrupt to the interval timer control unit 23 at fixed intervals unless a stop setting is performed. Thereafter, upon receiving the interval request, the LAN transmission / reception control unit 21 stores its own MAC address stored in the memory,
An ISH message is created from the ES group address and the own NSAP address (network entity title), and transmitted from the LAN transmission / reception circuit 16 (S66).

(3) Processing when the power of the LAN processing device is changed from power-off to power-on When the LAN processing device 1 changes from the power-off state to the power-on state, the power-on / off state occurs. The detection circuit 11 detects and notifies the power-on circuit control unit 15.

The power-on circuit control section 15 notifies the LAN transmission / reception control section 21 that the LAN processor 1 has been turned on. The LAN transmission / reception control unit 21 that has received the notification puts the LAN transmission / reception circuit 16 into an operation stop state. Thereafter, the LAN transmission / reception circuit 16 does not receive a message from the LAN transmission path.

At this time, the LAN transmission / reception control unit 21
An interval timer stop request is issued to the interval timer control unit 23. Upon receiving the interval timer stop request, the interval timer control unit 23 sets the interval timer 25 to stop operating. Thereafter, the interval timer 25 stops operating.

(4): Processing when a message addressed to its own MAC address is received When the LAN transmission / reception circuit 16 receives a message in the above-described message receivable state, the LAN transmission / reception control unit 21 is notified that the message has been received. I do.

The LAN transmission / reception control unit 21 receiving this notification
Receives the message received from the LAN transmission / reception circuit 16 and passes it to the received message analysis unit 18. Received message analyzer 18
Analyzes the received message and confirms the following items.

The message is not a broadcast message but a message addressed to itself (addressed to its own MAC address). : Message of correct OSI protocol (DT-NPDU)
That.

When the above items are confirmed, the received message analysis unit 18 sends the power-on circuit control unit 15
The power on of the AN processor 1 is instructed. Note that, among the items to be confirmed, a strict check of the OSI protocol is performed, and it is better not to perform the check in order to enable power-on with another protocol.

In response to the power-on instruction, the power-on circuit control unit 15 sends the power-on circuit 14
The power-on of the N processing device 1 is instructed. Thereafter, the power-on circuit 14 powers on the LAN processor 1.

Thereafter, when the LAN processor 1 enters the power-on state, the power-on / off detection circuit 11 detects the power-on, and notifies the power-on circuit control unit 15. The power-on circuit control unit 15 having received the notification notifies the LAN transmission / reception control unit 21 that the LAN processing device 1 has been turned on.

The LAN transmission / reception control unit 21 receiving this notification
Then, the operation of the LAN transmitting / receiving circuit 16 is stopped. Thereafter, the LAN transmission / reception circuit 16 does not receive a message from the transmission path.

At this time, the LAN transmission / reception control unit 21
Issues an interval timer stop request to the interval timer control unit 23. Upon receiving the interval timer stop request, the interval timer control unit 23 sets the interval timer 25 to stop operating. Thereafter, the operation of the interval timer stops.

[0204]

As described above, the present invention has the following effects. That is, by transmitting an ESH message at a predetermined interval when the own system is ES and an ISH message when the own system is IS, the correspondence between the MAC address of the own system and the NSAP address can be notified to other systems. .

As a result, even in a LAN system configured by the ES-IS protocol of OSI, a message via the LAN (including an arbitrary relay means such as via a WAN-LAN and a message transmitted via a protocol) is transmitted to the LAN system.
Remote power-on of the processing device becomes possible.

[Brief description of the drawings]

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

FIG. 2 is a system connection diagram of the first embodiment.

FIG. 3 is a control sequence of the system of the first embodiment.

FIG. 4 is a system configuration diagram of the first embodiment.

FIG. 5 is a processing flowchart 1 (power on → power off → ESH transmission) of the first embodiment.

FIG. 6 is a processing flowchart 2 (power off → power on) of the first embodiment.

FIG. 7 is a process flowchart 3 (power-off → reception of a message addressed to its own MAC address) of the first embodiment.

FIG. 8 is a system connection diagram of the second embodiment.

FIG. 9 is a control sequence 1 of the system of the second embodiment.

FIG. 10 is a system configuration diagram of a second embodiment.

FIG. 11 is a process flowchart 1 (power on → power off → ESH transmission) of the second embodiment.

FIG. 12 is a process flowchart 2 (power-off → reception of a message addressed to the own ES group address) of the second embodiment.

FIG. 13 shows a control sequence 2 of the second embodiment.

FIG. 14 is a system connection diagram of the third embodiment.

FIG. 15 is a control sequence of the system according to the third embodiment.

FIG. 16 is a system configuration diagram of a third embodiment.

FIG. 17 is a processing flowchart of the third embodiment (power on → power off → ISH transmission).

FIG. 18 is an explanatory diagram of a conventional system.

FIG. 19 is a system configuration diagram of a conventional example.

FIG. 20 is a processing flowchart of a conventional example (processing of a LAN automatic power control device).

[Explanation of symbols]

 Reference Signs List 1 LAN processing device 2 LAN communication adapter 3 LAN automatic power control device 23 Interval timer control unit 25 Interval timer PN power-on control unit CM transmission / reception unit ME memory

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masahiro Kazumi 1015 Kamikodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (56) References JP-A-62-24743 (JP, A) JP-A-54-92129 (JP, A) JP-A-53-83428 (JP, A) JP-A-62-31232 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04L 29/00 H04L 12 / 28 H04L 12/46

Claims (6)

(57) [Claims] At least a transmission / reception unit for controlling transmission / reception of a message via a LAN, and a power-on control unit for controlling power-on of the LAN processing device, wherein the power-on of the LAN processing device is controlled by the message via the LAN. In a possible LAN automatic power control device, when a LAN processing device is in a power-off state , an E- address addressed to a predetermined IS group address is set at a predetermined interval.
And transmitting an SH message, and then receiving a DT-NPDU message addressed to its own MAC address , the power-on control unit powers on the LAN processing device. A power-on control method for the control device. 2. The power-on control method for a LAN automatic power control device according to claim 1, further comprising: a DT-NPDU message addressed to a preset ES group address and addressed to a preset NSAP address.
A power-on control method for a LAN automatic power control apparatus, wherein the power-on control section powers on the LAN processing apparatus when a power-on control signal is received. 3. The automatic LAN power control according to claim 1.
In the power-on control method for the device, the method further comprises:
DT-NPDU addressed to the set NSAP addressTelegram
ToWhen received, the source MAC of this DT-NPDU messageTo address
In the ESHTelegramAnd then, by the power-on control unit, the LAN processing device
LAN automatic power control characterized by powering on LAN
A power-on control method for the device. And a power-on control unit for controlling power-on of the LAN processing apparatus. The power-on control unit controls power-on of the LAN processing apparatus. In a possible LAN automatic power control device, when the power of the LAN processing device is in a power-off state , an ISH message addressed to a predetermined ES group address is transmitted at a predetermined interval, and then addressed to its own MAC address. A power-on control method for a LAN automatic power control device, characterized in that the power-on control unit powers on a LAN processing device when a DT-NPDU message is received. 5. A process for performing communication processing by being connected to a transmission path.
In a control device for performing power control on the device, when the processing device is in a power-off state, a preset interval
ESH message addressed to the IS group address set in advance
And an OSI message addressed to the MAC address of the processing device.
Means for powering the processing device based on the received OSI message.
And a power-on control unit for turning on the power . 6. A process for performing communication processing by being connected to a transmission path.
In a control device for performing power control on the device, when the processing device is in a power-off state, a preset interval
Then, an ISH message addressed to the preset ES group address
And an OSI message addressed to the MAC address of the processing device.
Means for powering the processing device based on the received OSI message.
And a power-on control unit for turning on the power .