JP3301900B2 - Data processing system having power control function and power control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing system and a power supply control method which enable a power supply control of a data processing system installed in a remote place in a computer system via a network.

[0002]

2. Description of the Related Art A system for turning on / off a power supply of a data processing system installed in a remote place through communication or the like, that is, a remote power supply control system has been put to practical use. Conventional remote power control is performed by an electric call. For example, when the power is turned on by communication via a telephone exchange network using a modem or the like, for example, a call signal (16
(Hz or 1,300 Hz). As a result, the power of the data processing system is turned on even in the case of a wrong telephone call. In addition, this method uses 10 BAS
It cannot be applied to a system using a network in which a signal such as a link test pulse is always transmitted on a transmission line, such as ET.

[0003]

In order to solve such a problem, a method of turning on / off the power by interpreting a received message in accordance with a communication protocol stored in the RAM is also conceivable. However, in this case, the power is cut off,
When the communication adapter is reset due to a failure, the communication protocol on the RAM is lost and communication becomes impossible. Although it is possible to store the communication protocol in the ROM, it is difficult to update the program and upgrade the version.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a data processing system and a power supply control method capable of reliably turning on power from a remote place regardless of occurrence of a failure such as a power failure. And

[0005]

To achieve the above object, a data processing system according to a first aspect of the present invention comprises a main unit having a power supply control unit, and turning on / off a main power supply of the main unit. and a communication device with the power regardless of the supplied, the communication device includes receiving means for receiving a message comprising data indicating the source and the power is turned on via a network, received by the receiving means After interpreting the message and instructing the power supply control unit of the main unit to turn on the power, and after instructing by the first turn-on instruction unit, the main unit was monitored to confirm that the power was turned on. At this time, a notification means for notifying the transmission source of the fact and a second power-on for instructing power-on to the power-supply control unit of the main unit after detecting power-off and detecting power-off. Indicating means; After powering on the main device, the communication device includes means for downloading a communication protocol supplied from the main device, and notifying means for notifying the main device of the reason for turning on the power. Or a means for turning on the main power of the main unit in accordance with an instruction from the second input instruction means, wherein the main unit supplies a communication protocol to the communication device when the power is turned on, The communication device further comprises means for inquiring of the communication device about the power-on reason, and means for executing a process corresponding to the power-on reason supplied from the communication device.

According to such a configuration, the power-on is instructed using the transmission source address and the power-on-instruction message, so that a situation in which the power is accidentally turned on due to a wrong telephone call or the like can be prevented. . Further, power control can be performed regardless of the type of communication path. Further, when a power failure or the like occurs, the communication protocol is downloaded from the main unit to the communication device at the time of recovery, so that subsequent communication can be performed even if the communication protocol is stored in the volatile memory.

A remote power control method according to a second aspect of the present invention is a method of transmitting a message from a host system to a communication device via a network and turning on the main power of the controlled terminal by the communication device. Transmitting a message from the host system to the controlled terminal, and turning on the main power of the controlled terminal by interpreting the message in the communication device.After turning on the main power, the communication protocol is transmitted from the controlled terminal. downloaded to the communication device, after downloading a communication protocol, wherein the communication device notifies the start reason the controlled terminal executes a process corresponding to the start reason in the controlled terminal, and wherein the.

[0010] According to such a configuration, since the power-on is instructed by using a telegram, it is possible to prevent a situation in which the power is erroneously turned on due to a wrong telephone call or the like. In addition, power control can be performed regardless of the type of network.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A data processing system and method according to an embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, this remote power control system includes a data processing system 11 to be controlled, a host system 13 for remotely controlling the power of the data processing system 11, and a telephone exchange for connecting the two. Net 12
It is composed of

The data processing system 11 comprises a main unit 21, a communication adapter (communication device) 31, and a power adapter 41. The main device 21 includes a CPU 101,
ROM 102, RAM 103, auxiliary storage device 104
, A display device 105, a bus I / F 106, an internal bus 107, and a power supply control unit 108 for supplying power to these components.

The CPU 101 has a ROM 102 and a RAM 1
Data processing is performed in accordance with the program stored in the program 03. The ROM 102 stores a program that defines an initial operation at power-on (for example, an operation of loading an operating system into the RAM 103) and the like. RAM103
Is a volatile memory for storing an operating system and the like. The auxiliary storage device 104 includes a hard disk device and the like, and stores an operating system, a communication protocol, and the like. The display device 105 displays arbitrary data including the activation reason and the like.

The bus I / F (interface) 106
It is connected to the internal bus 107 and to the communication adapter 31 via the extension bus 211. The internal bus 107 includes a power supply line and interconnects internal circuits. The power control unit 108 includes a power control I / F (interface) 212
And turns on / off the supply of power to the internal circuit according to the notification supplied from the communication adapter 31 via the power control I / F 212.

On the other hand, the communication adapter 31
, ROM 202, RAM 203, battery backup memory (BBM) 204, communication control unit 205
, Power-on signal generation circuit 206, bus I / F 207
, An internal bus 208, and a power supply monitoring circuit 209.

The CPU 201 comprises a ROM 202, a RAM 2
The processing is performed according to a program stored in, for example, “03”. R
The OM 202 stores a processing operation program when the power of the communication adapter 31 is turned on. The RAM 203 stores a communication protocol, a destination NSAP address described later, a source NSAP address, and the like. The BBM 204 includes a RAM backed up by a battery or the like, and stores various control flags.

The communication control unit 205 is connected to the host system 13 via the telephone exchange network 12 and
3 is communicated. The power-on signal generation circuit 206 outputs a power-on signal to the power control unit 108 under the control of the CPU 201. The power supply monitoring circuit 209 is connected to the bus I / F 20
7. The status of the power supply of the main unit is monitored via the expansion bus 211 and the bus I / F 106, and the status is notified to the CPU 201 via the internal bus 208. The bus I / F 207 is connected to the bus I / F 106 of the main unit 21 via the extension bus 211.
, And controls communication between the main device 21 and the communication adapter 31.

The power supply adapter 41 receives power from an external power supply (in the figure, a commercial 100 V power supply) and
Power is supplied to the communication adapter 31 regardless of whether the power is turned on or off.

Next, (1) remote power control operation and (2) recovery operation from a power failure of the remote power control system having the above configuration will be described. (1) First, the remote power control operation will be described with reference to FIGS. When the main unit 21 is turned off, the CPU 10
1 is a bus 107 and a bus I / F 10 for setting the communication adapter 31 to a remote power-on instruction message waiting state.
6. A remote power-on instruction wait setting command is issued to the communication adapter 31 via the expansion bus 211 (step S1).

The remote power-on instruction wait setting command is:
The data is stored in the RAM 203 via the bus I / F 207 and the bus 208. The CPU 201 interprets the command stored in the RAM 203 and stores the command in the battery backup memory (B
A remote power-on flag indicating that the remote power-on instruction wait state is set in the BM) 204, and the system enters a state of waiting for reception of a message instructing power-on (step S2).

Subsequently, the CPU 201 sets the bus I / F 20
7. Issue a reception completion command for the remote power-on instruction wait setting command to the main unit 21 via the expansion bus 211 (step S3). The CPU 101 issues an off command to the power control unit 108 in response to the reception completion command. The power supply control unit 108 stops the power supply operation in response to the off command, and turns off the main power supply of the main device 21 (step S4). Note that the main power supply of the main device 21 may be turned off by manual operation.

The procedure for turning on the power of the data processing system 11 from the host system 13 is as follows. First, the host system 13 makes a physical connection to the data processing system 11, and then transmits a remote power-on instruction message (step S11). This message is
SAP address (address of communication adapter 31) and source N
Includes a SAP address (address of the host system 13) and a message instructing power-on. In this example, since the network is constituted by the telephone switching network 12,
Transmit the CR-NPUD frame.

This message is temporarily stored in the RAM 203 via the telephone exchange network 12, the communication control unit 205, and the bus 208. The CPU 201 interprets the received message, and when power-on is instructed, the destination NSAP address and the source NSAP address registered in the RAM 203 in advance and the destination NSAP address and the source NSAP included in the received message. Compare addresses.

If these match, the received message is regarded as a legitimate remote power-on instruction message and the BBM 20
4 to determine whether the remote power-on flag is set (step S12). If the remote power-on instruction waiting flag is set, the CPU 201
IO-writes the power-on signal to the output port of the power-on signal generation circuit 206 (step S13). The power-on signal is supplied to the power control unit 108 via the power control I / F 212 (step S14). The power control unit 108
The power supply to each internal circuit is started in response to the power-on signal (step S15).

After the CPU 201 generates the power-on signal, the power-supply monitoring circuit 209, the bus I / F 207, and the extension bus 211
The state of the main power supply of the main unit 21 is monitored by monitoring the voltage of the power supply line on the internal bus 107 via the. When it is detected that the voltage of the power supply line on the internal bus 107 has stabilized and the main unit 21 has started (step S1).
6) The CPU 201 rejects the establishment of the connection (communication path) to the host system 13 and transmits a message notifying that the remote power-on instruction has been received to the host system 13 (step S17).
Here, since the network is constituted by the telephone line network 12, the physical line is disconnected after transmitting the CQ-NPDU frame. The host system 13 confirms that the power of the main unit 21 is turned on based on the message, and thereafter communicates with the data processing system 11 via the telephone exchange network 12 as necessary.

In the main unit 21, when the main power is turned on,
A reset signal is output from a power reset circuit as shown in FIG. 4, and the CPU 101 is reset. With this reset, the CPU 101 executes a predetermined program stored in the ROM 102 and performs predetermined initial processing such as loading an operating system (OS) from the auxiliary storage device 104 into the RAM 103 (step S18).

When the loading of the OS is completed, the CPU 101 reads the communication protocol stored in the auxiliary storage device 104, and reads out the bus I / F 106, the expansion bus 211, and the bus I / F.
/ F 207 and transfer (download) to the RAM 203 via the bus 208 (step S19). Subsequently, a command for inquiring about the power-on reason is issued through the same route (step S20). This command is used for bus I /
F106, expansion bus 211, bus I / F 207, bus 2
08, stored in the RAM 203, and interpreted by the CPU 201. In response to this command, the CPU 201 determines whether the remote power-on flag is set in the BBM 204 (step S21).

When it is confirmed that the remote power on flag is set, the CPU 201
, The power-on according to the message is notified (step S22), and the remote power-on flag in the BBM 204 is cleared (step S23). This notification is sent to the bus I / F 207, the extension bus 211, the bus I
The data is stored in the RAM 103 via / F106. CPU
The interpreter 102 interprets this notification, displays the power-on reason, that is, the power-on according to the instruction from the host system 13 on the display device 105, and furthermore, processes registered in advance corresponding to this reason (process A ) (Step S2)
4).

In this way, the power of the main unit 21 is turned on by the message supplied from the host system 13. Since this message contains the destination NSAP address and the originating NSAP address, it is possible to prevent a situation in which the power of the main unit 21 is accidentally turned on due to a wrong telephone call or the like.

(2) Next, a recovery method when the communication protocol in the communication adapter 31 is lost due to a power failure or the like will be described with reference to FIGS. The procedure for setting the main device 21 and the communication adapter 31 in the remote power-on instruction message waiting state is the same as described above. In the remote power-on instruction message waiting state, the power supply from the power adapter 41 is cut off due to, for example, a power failure and the RAM is turned off.
It is assumed that the communication protocol, control program, and the like stored in 203 have been lost (step T1).

Here, when the power supply from the power supply adapter 41 is restored due to the elimination of the power failure, the communication adapter 3
A reset signal is output from the power reset circuit on
The CPU 201 is reset (step T1). CP
U201 executes the recovery program stored in the ROM 202 and starts the recovery processing. First, the CPU 201
Initializes an input / output port (IO) in the communication adapter 31 (step T2), and subsequently checks whether or not a remote power-on flag in the BBM 204 is set (step T3).

The contents recorded in the BBM memory 204 are as follows:
The remote power-on flag is set because the power is not lost even when the power of the power adapter 41 is turned off or the reset signal inside the communication adapter 31 is lost. After confirming that the remote power-on flag is set, the CPU 201 writes a power-on signal in the power-on signal generation circuit 206 (step T4), and sets a power-off flag in the BBM 204 (step T5).

The remote power-on signal written in step T4 is supplied to the power control unit 1 via the power control I / F 212.
08 (step T6). Power control unit 108
Starts supplying power to the internal circuit in response to the power-on signal (step T7).

In response to the start of power supply, a reset signal is output from the power reset circuit, and the CPU 101 is reset. By resetting, the CPU 101
02 according to the program stored in the auxiliary storage device 10.
4 to load the OS into the RAM 103 (step T
8). When the loading of the OS is completed, the CPU 101 reads the communication protocol from the auxiliary storage device 104 and downloads the communication protocol to the RAM 202 of the communication adapter 31 (step T9). Then, on the same route, the communication adapter 3
A command for inquiring about the activation reason (power-on reason) is issued to the device 1 (step T10). In response to this command, the CPU 201 determines the flag set in the BBM 204, and confirms that the power-on flag and the power-off flag are set (step T11).

When the CPU 201 confirms the remote power-on flag and the power-off flag, the CPU 201 resets the power-off flag (step T12). Further, the reason why the main unit 21 is activated is that the power of the communication adapter 31 is turned off. Is notified (step T13). Thereafter, the communication adapter 31 enters a remote power-on instruction message waiting state.

The CPU 10 receiving the power-on reason
1 performs a shutdown process according to a program on the RAM 103 (step T14), and
8 to turn off the main power supply (step T15).

With the above processing, after the power is restored, the communication protocol on the RAM 203 of the communication adapter 31 is restored, and the remote power control from the host system 13 becomes possible.

In the above description, remote power control using the telephone exchange network 12 has been described, but the type of network connecting the host system 13 and the communication adapter 31 is arbitrary. Here, when the network is composed of an ISDN network, “CR-NPDU” in the telephone switching network is used.
By replacing "frame" and "CQ-NPDU frame" with "SEUP message" and "REL COMP message", respectively, and replacing "destination NSAP address" and "originating NSAP address" with "terminating subaddress" and "originating subaddress", respectively. realizable.

In a local area network using TCP / IP, for example, a frame in which specific user data is written from the host system 13 to a specific UDP destination port is transmitted from the host system 13 to the communication adapter 31. The CPU 201 of the communication adapter 31 regards this as a power-on instruction message and outputs a power-on instruction signal to the main unit 21. Further, upon detecting that the main power supply of the main unit 21 is turned on, the CPU 201 uses a frame in which specific user data is written to a specific UDP destination port as a power-on instruction accept message.
Send to 3. The network is not limited to a wired system, but may be a wireless system.

The main unit 21 and the communication adapter 31
And the configuration of the power reset circuit can be arbitrarily changed.

[0040]

As described above, according to the present invention, it is possible to reliably turn on the power of a data processing system at a remote location regardless of the type of communication line. Further, even when the communication protocol in the communication adapter is lost due to a power failure or the like, the communication protocol is restored, and normal power control becomes possible.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an embodiment of a remote power supply control system.

FIG. 2 is a diagram showing a sequence of a remote power-on process.

FIG. 3 is a diagram showing a sequence of a power failure recovery process.

FIG. 4 is a diagram illustrating a configuration example of a power reset circuit.

[Explanation of symbols]

 11 Data Processing System 12 Telephone Switching Network 13 Host System 21 Main Unit 31 Communication Adapter 41 Power Adapter

Continuation of front page (56) References JP-A-60-125041 (JP, A) JP-A-63-63258 (JP, A) JP-A-2-143666 (JP, A) JP-A-4-317199 (JP) , A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04M 11/00-11/10 G06F 1/26 H04Q 9/00-9/16

Claims (5)

(57) [Claims] 1. A communication system comprising: a main unit having a power control unit; and a communication device to which power is supplied regardless of whether main power of the main unit is turned on or off. receiving means for receiving via the network a message containing data indicating the interprets the received message by the receiving means, a first on instruction means for instructing the power-on to the power control unit of the main device After the instruction by the first input instruction means, the main unit is monitored, and when it is confirmed that the power is turned on, a notification means for notifying the transmission source of the fact, and that the supplied power is shut off. A second power-on instruction means for instructing the power supply control unit of the main unit to turn on the power after the power is restored, and a method of downloading a communication protocol supplied from the main unit after the power of the main unit is turned on. And notifying means for notifying the main unit of the reason for turning on the power. The power control unit includes means for turning on the main power of the main unit in accordance with an instruction from the first or second turning on instruction means. The main unit includes: a unit that supplies a communication protocol to the communication device when the main power is turned on; a unit that inquires a reason for powering on the communication device; and a power supply that is supplied from the communication device. And a means for executing a process corresponding to the reason (1), comprising: a data processing system having a power control function. 2. The apparatus according to claim 1, wherein said main unit includes means for transmitting a power-on instruction wait setting command to said communication device when power is turned off. Means for setting a remote power-on flag to the first power-on flag, wherein the first power-on instruction means instructs the power control unit to power on only when the remote power-on flag is set, and the notifying means comprises: Checking the remote power-on flag, when the remote power-on flag is set, notifying the main unit that the activation reason is a telegram, and further resetting the remote power-on flag. The data processing system according to claim 1, wherein: 3. The second power-on instruction means includes means for setting a power-off flag in the non-volatile memory, and the second power-on instruction means is provided only when the remote power-on flag is set. The power control unit is instructed to turn on the power, the notifying unit checks the remote power-on flag and the power-off flag, and when both flags are set, the activation reason is due to the power-off. The data processing system according to claim 2, wherein the main unit is notified of the fact, and the power-off flag is reset. 4. A method of sending a message from a host system to a communication device via a network and turning on the main power of the controlled terminal by the communication device, wherein the host system sends the message to the controlled terminal. The communication device interprets the message and turns on the main power of the controlled terminal. After turning on the main power, downloads the communication protocol from the controlled terminal to the communication device. Before
Serial notifies the start reason the controlled terminal executes a process corresponding to the start reason in the controlled terminal, the power control method characterized by. 5. The communication device detects the interruption of power supply, turns on the main power of the controlled terminal after restoration of the power failure, downloads the communication protocol to the communication device after turning on the main power, and downloads the communication protocol. 5. The power supply control method according to claim 4, further comprising: notifying the main device of the activation reason, and executing a process corresponding to the activation reason in the controlled terminal.