JPS6224743A - Network system - Google Patents

Abstract

PURPOSE:To apply power by providing a detection means detecting a transmission frame addressed to the own equipment sent via a communication medium and a power application means started by the detection of reception of the transmission frame addressed to the own device by the said detection means and applying the main power of the own device to control only a normal data transmission. CONSTITUTION:When power from a main power circuit 12 is supplied, the processing mode is changed, a detection time measuring circuit 13 is started to supervise the elapse of a prescribed time. Then an own address detection circuit 10 supervises whether or not a destination address in a transmission frame on a transmission line 1 is a set value of an address setting circuit 16. When the transmission frame addressed to the own device is received, a detection signal is outputted to the detection time measuring circuit 13. When the own address detection circuit 10 detects no transmission frame addressed to the own device, whether or not timeout is generated is checked and when timeout is generated, a timeout signal is outputted to a power OFF control circuit 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a network system that is composed of a plurality of transmission devices connected by a communication medium and that performs data transmission using a transmission frame having a destination address.

[Prior Art] A local area network system is connected to a file server, a print server, and the like that are used for sharing with other devices connected to the system.

This type of device is assumed to be commonly accessed and shared by other devices (various terminal devices) connected to the local area network, so even one of these terminal devices is operating. There is a possibility that it may be accessed.

Therefore, it is necessary to keep the shared device powered on at all times while the system is in operation.

[Problems to be solved by the invention] However, conventionally, the power supply of these devices is 0N10FF￥J.
The operator must go directly to the installation location of the device to perform control, and if the terminal device and these shared devices are installed in different locations, even one terminal device is in operation. An operator was also on standby on the shared device side, and the power had to be turned off after processing was completed. This was very inconvenient.

It is also possible to provide a sequence that turns off the power of the device by sending and receiving specific control data over the network, but a corresponding special program must be created and maintained on the terminal device side. , it lacked versatility.

Means for Solving Problem L] The present invention was made in view of the drawbacks of the above-mentioned prior art, and as a means for solving this problem, for example, a specific transmission device is constantly supplied with power and the communication medium is The apparatus includes a detection means for detecting a transmission frame addressed to the apparatus itself sent through the apparatus, and a power-on means for turning on the main power of the apparatus activated when the detection means detects reception of the transmission frame addressed to the apparatus itself.

[Function] In this configuration, power can be turned on simply by executing normal data transmission control.

[Example] Hereinafter, an example according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a transmission device including a disk device as a file server connected to a local area network system (hereinafter referred to as LAN) according to an embodiment of the present invention.

゛In Fig. 1, 1 is a transmission line of a LAN which is a communication medium, 5 is a driver circuit that transmits (sends) data to be transmitted to the transmission line 1, and 6 is a communication unit that controls transmission and reception of data transmission with the LAN. A control unit, 7 is a processor unit that controls the entire device, 8 is an external magnetic storage device (hereinafter referred to as the disk unit) that stores a large amount of data that is a shared file of various LANs, and 9 is a processor unit that controls the entire device, 9 is a storage unit that stores data from a transmission line l, IO is a self-address detection circuit that detects whether the destination address included in the transmission frame received by the receiver circuit 9 matches the self-device address set in the address setting circuit 16; 11 is a 1rL source ON control circuit that is activated by detection of a transmission frame addressed to the device itself from the own address detection circuit 1O and turns on the main power supply circuit 12; 12 is a main power supply circuit that converts commercial AC power into internal use voltage and supplies it; This is a power supply circuit. Reference numeral 13 denotes a detection time measuring circuit that measures whether or not a next transmission frame addressed to the apparatus is detected before a predetermined period of time elapses after the detection of the transmission frame addressed to the apparatus by the own address detection circuit 10; 14 is a detection circuit; A power OFF function that turns off the main power circuit 12 when the time measurement circuit 13 does not confirm reception of transmission frames addressed to the device within a predetermined period of time.
F control circuit.

Reference numeral 15 denotes an auxiliary power supply circuit that is always turned on.
Power is supplied to each of the power ON control circuit 11, the detection time measurement circuit 13, and the power OFF control circuit 14, and these circuits are kept in an operable state at all times. Further, 16 is an address setting circuit configured by, for example, a DIP switch, and sets the own device address.

Note that among the above-mentioned circuits, the detection time measurement circuit 13 and the power supply OFF control circuit 14 may be supplied with power from the main power supply circuit 12.

The above configuration is not limited to shared devices, but by providing the same configuration to all devices that make up the network, all devices can only perform normal transmission control without incorporating a new special power supply 0N10FF control procedure. This allows 0N10FF control of the power supply for transmission equipment, etc.

FIG. 2 shows a configuration diagram of a LAN configured by a transmission device having the above configuration.

In FIG. 2, l is the same LAN transmission line as in FIG.
is a workstation (hereinafter referred to as Ws), 3 is a LAN
The FS3 is a file server (hereinafter referred to as FS) which is a shared device of the FS3, and the FS3 has the configuration shown in FIG. 1, for example.

Further, 4 is a print server (hereinafter referred to as ps) which is a LAN sharing device.

This embodiment shows a representative example of a small-scale network configuration, and three WS2 are FS3. and FS4 are shared.

Here, when the WS2 accesses a file in the FSS, the WS2 sends an access command to the FS3, and controls the FS3 to read/write the corresponding file data. For this reason, each WS2 may be powered on only when the user actually operates it, and may be turned off in other cases.
can also be done relatively easily.

On the other hand, the shared device needs to be remotely controlled from WS2, and it is almost impossible for the operator to turn on the power to the shared device every time WS3 is operated.For this reason, in this embodiment, , the power of this shared device is turned ON10FF under the control shown below.

Hereinafter, the power supply control of this embodiment will be explained using the FS3 shown in FIG. 1 as an example, with reference also to the flowchart in FIG. 3.

As long as the power plug 17 is connected to the commercial power supply, the receiver circuit 9 is always connected to the auxiliary power circuit 15.

Own address detection circuit 10 and power ON control circuit 11
Power is supplied to the circuits, etc., and each of these circuits is maintained in an active state.

When data is transmitted on the transmission path l, the data is sequentially received by the receiver circuit 9 and output to the own address detection circuit 10. In step St, the own address detection circuit IO monitors whether the destination address in the received data is the own device address set by the address setting circuit 16, that is, whether there is a device requesting use of the own device. When transmission data having the own device address value as the destination address is detected, the process proceeds to step S2, where a detection signal is output to the power-on control circuit 11, and the power-on control circuit 11 is activated.

The power ON control circuit 11 activated by the detection signal energizes the main power supply circuit 12 in step S3 to supply main power to other parts.

As a result, power is also supplied to the processor section 7, disk section 8, communication control section 6, and driver circuit 5, and from then on, normal processing operations are executed as shown in step S4.

At this time, from the auxiliary power supply circuit 15, the detection time measurement circuit 13,
In the case of a configuration in which power is not supplied to the power OFF control circuit 14, power is supplied to both circuits here.

When the power is turned on from the main power supply circuit 12, the processing mode is changed, and in step S5, the detection time measurement circuit 13 is activated, and thereafter, the elapse of a predetermined time is monitored. Then, the second address detection circuit 10 monitors whether the destination address in the transmission frame on the transmission line 1 is the set value of the address setting circuit 16 in step S6. If a transmission frame addressed to the device itself is received, a detection signal is output to the detection time measuring circuit 13. When the detection time measurement circuit 13 receives the signal, it resets the time measurement in step S7, and then returns to step S6 to prepare for reception of the next transmission frame addressed to its own device.

If the own address detection circuit 1O does not detect a transmission frame addressed to the own device in step S6, the process proceeds to step S8, and it is checked whether the set time of the detection time measuring circuit 13 has elapsed and a timeout has occurred. If no timeout has occurred, the process returns to step S6, and if a timeout has occurred, a timeout signal is output from the detection time measurement circuit 13 to the power OFF control circuit 14, and the process proceeds to step SIO.

Power OFF control circuit 14 that received the timeout signal
Then, in step SIO, it is checked whether the processor unit 7 is executing a process. This is determined based on a processing signal from the processor section 7 indicating whether or not processing is being executed. If the process is being executed, the process returns to step S6. This is a case where it takes a long time to process an access request from WS2, etc. Even in such a case, turning off the power immediately would be a serious problem, so turning off the power is prevented. be.

If the processor section 7 is not executing the process in step 510 and has completed the process, the power OFF control circuit 14 proceeds to step Sll and de-energizes the main power circuit 12, and the main power circuit 12 supplies power in step S12. Cut off the power. Then, the process returns to step S1 to prepare for access from WS2 and the like.

Even during the execution of the processing from step 35 to step SlO among the above processes, the processor section 7, the communication line section 6
, the disk unit 8, etc., operate completely separately and independently from these series of processes, and execute various processes in response to access requests, command requests, etc. from the WS 2, etc.

As explained above, self-address detection circuit 10° power ON
By providing the control circuit 11, the detection time measurement circuit 13, the power OFF control circuit 14, and the auxiliary power supply circuit 15 in a shared device, for example, an operator who wants to use the network can start the network by simply turning on the power of the device he or she is operating. By simply accessing the other shared device, for example, the accessed shared device is automatically powered on, started up, and can be used freely. Furthermore, when the use of the shared device is finished and access is discontinued, it is sufficient to simply turn off the power of the own device.

If no device accesses the shared device, the power is automatically turned off after a predetermined period of time and the shared device enters a standby state.

Therefore, by installing a simple additional circuit, it is possible to obtain the great effect of being able to use the shared device without having to manage things such as turning on the power, and without having to perform any other operations. .

In addition, by providing this configuration to other transmission equipment, it is possible to control the power supply of all devices on the network to 0N10FF without requiring any special commands or changing the normal protocol. .

[Effects of the Invention] As explained above, according to the present invention, ON10FF control of the power supply of the transmission devices constituting the network can be performed only by normal transmission control procedures without using any special commands. We can provide a network system that is easy to use, easy to use, and efficient.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a transmission device constituting a network system according to an embodiment of the present invention. FIG. 2 is a network system configuration diagram of an embodiment according to the present invention, and FIG. 3 is a power supply control flowchart of the transmission device of the embodiment. In the figure, 1...transmission line, 2...workstation,
3...File server, 4...Print server, 5
...Dry 8 circuits, 6.Communication control section, 7.Processor section, 8.Disk section, 9.Receiver circuit, 10.Self address detection circuit, 11.Power supply O
N control circuit, 12... Main power supply circuit, 13... Detection time measurement circuit, 14... Power OFF control circuit, 15...
- Auxiliary power supply circuit, 16...Address setting circuit. 1st N 2nd figure

Claims (4)

[Claims] (1) In a network system that is composed of a plurality of transmission devices connected by a communication medium and transmits data using a transmission frame having a destination address, power is always supplied to the specified transmission device and the data is sent via the communication medium. A network characterized by comprising: a detection means for detecting a transmission frame addressed to the own device, and a power-on means for turning on the main power of the own device when activated by the detection of reception of the transmission frame addressed to the own device by the detection means. system. (2) monitoring means for monitoring whether or not the detection means detects a transmission frame addressed to the device within a predetermined time after the main power is turned on by the power supply means; 2. The network system according to claim 1, further comprising power cutoff means for cutting off the main power of the device when frame reception is not detected. (3) The network system according to claim 1, wherein the network system performs CSMA/CD transmission control. (4) Claim 1 or 2, characterized in that the specific transmission device is a shared device of a network system.
The network system described in Section.