JPS6142463B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for remotely powering on a port in an optical dataway system using an optical fiber cable as a transmission line.

As shown in Fig. 1, the data way system connects processing units CPU1 and CPU2 such as electronic computers and ports P1 to P5 that accommodate multiple terminals Tij (where i and j are arbitrary integers) in a loop. It allows data to be exchanged between a processing device and a terminal or between terminals, and port P
The transmission lines _l1 to _l5 between P1 to P5 are several hundred meters to several kilometers. Therefore, when starting up the system, especially when turning on the power, it is required to be able to turn on the power remotely.

Traditionally, the remote port of a dataway system was powered on by an operator who went to a remote location, or it was powered on separately from the dataway system's transmission line.
The solution was to install a power-on signal line and use this to turn on the power remotely. The former method is out of the question because remote input cannot be achieved through central control, and the latter method requires a signal line separate from the transmission line of the data way system for the number of ports composing the system + α.
The problem is that it is economically expensive, and this tendency becomes even stronger when optical fiber cables are used as data transmission paths.

The present invention has been made to obviate the drawbacks of the prior art as described above, and it is therefore an object of the present invention to provide an economically inexpensive remote power-up method for ports in optical dataway systems. There is a particular thing.

The main point of the configuration of the present invention is that, in an optical data way system, a power-on code pulse having a pulse width larger than the data pulse is sent to the central port, regardless of the data pulse transmitted in a frame configuration on the transmission line. The remote port includes a CMOS pulse generator that consumes less power as a discriminator for the power-on code pulse than a receive discriminator for the data pulse transmitted in a frame configuration. In addition to providing a power-on sign pulse discriminator consisting of an element, an auxiliary power source having a smaller capacity than the main power source is provided in addition to the main power source as an auxiliary power source for driving at least the optical/electrical converter and the pulse discriminator. The auxiliary power supply is always on, and a power-on code pulse is sent from the central port to the remote port using the transmission line of the optical dataway system to turn on the main power at the remote port. The point is in the composition.

Next, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram showing one embodiment of the present invention, in which a central port P2 and an adjacent remote port P3 are extracted from an optical dataway system as an example. In Figure 2, 1
is a transmitting side code converter for sending data to the transmission line, 2 is an electrical to optical converter (E/O converter) for sending an optical signal to the optical transmission line 5, and 3 is a code pulse for powering on. The power-up code pulse generator that generates, 4, is the main power supply for the central port.
6 of the remote port P3 is an optical-to-electrical converter (O/E converter) that converts the received optical signal into an electrical signal, 7
8 is a receiving side code decoder as a reception discriminator that receives and discriminates the transmitted code signal and restores it to data; 8 is a power-on code pulse discriminator; 9 is an O/E converter 6 and a power-on code pulse discriminator. Vessel 8
, an auxiliary power supply supplying power to the remote port; 10 is the main power supply for the remote port;

Based on FIG. 2, the operation of turning on the main power of the adjacent remote port P3 from the central port P2 will be explained. At the central port P2, when the operator operates the power-on switch of the remote port P3 (not shown), the power-on code pulse generator 3 shown in FIG.
is activated, and the pulse signal shown in FIG. and is transmitted to the power-on sign pulse discriminator 8 through the O/E converter 6 of the remote port P3. The operation of the power-on sign pulse discriminator 8 will be described in detail later.
Here, when the own port number and the number of pulse signals match, a power-on signal is issued to the main power supply 10, and the main power supply 10 of the remote port P3 is turned on.

A specific example of the power-on sign pulse discriminator 8 is shown in FIG. In FIG. 4, 81 is a buffer amplifier, 82 and 83 are pulse width discriminators, and 8
2 indicates a pulse width of (T ₁ - β) or more, and 83 indicates a pulse width of (T ₂
- Logic “1” when a pulse width greater than or equal to β) is discriminated.
When both inputs become "0", the output immediately becomes "0". This pulse width discriminator is composed of an open collector IC, an RC integrator, and a comparator COM, an example of which is shown in the frame 82 in FIG. That is, the capacitor C is constantly charged via the resistor R and is at a nearly charged level, but when a signal with a certain pulse width is input to the open collector IC, it is discharged during that time and the potential decreases. This discharge level and a certain reference potential Vref are connected to a comparator COM.
When compared, when the former is lower than the latter,
If the comparator COM has a circuit configuration that outputs logic "0", it is possible to discriminate any pulse width by appropriately selecting the reference potential Vref and other circuit constants. 84 is a counting counter, 8
5 is a port number setter, 86 is a circuit for detecting coincidence between the output of the counter 84 and the output of the port number setter 85, and 87 is a flip-flop for holding a power-on signal. The operation shown in FIG. 4 will be explained based on the time chart of the power-on code pulse shown in FIG. When a pulse with a pulse width T ₁ is input to the pulse width discriminators 82 and 83 via the buffer amplifier 81,
The discriminator 82 has an output, but the discriminator 83 has no output. When the output of the pulse width discriminator 82 becomes "0", the counter 84 operates and the output becomes "1". A similar operation occurs with pulses, etc., and the output of the counter 84 becomes "n". In this case, since the port number setter 85 is set to "n", the output of the coincidence detection circuit 86 is "1" after the pulse is turned off. At this time, when the pulse comes, the output of the pulse width discriminator 83 also becomes "1", and the flip-flop 87 operates at the timing when this pulse turns off, and the power-on signal, which is the output of the flip-flop, becomes "1". As described above, this power-on signal becomes a signal for turning on the main power supply 10 in FIG. 2, and turns on the power to the remote port P3.

The above explanation is about how to power up adjacent remote ports from a central port.
The following describes how to power on remote ports that are not adjacent to each other. The first method is to transmit a data frame from the central port to a port that has already been powered on using the method described above, instructing the power-on of an adjacent remote port, and the port that receives this instruction transmits a data frame to the port that has already been powered on using the method described above. is to perform power-on. By executing this in sequence, you can power on all ports. The second method is to turn on power to all ports at once using a global power-on command, which will be described later.

FIG. 5 shows the overall configuration of the transmission circuit section of the remote port. 101 is an O/E converter, 102 is an E/O converter, 103 is a power-on sign pulse discriminator, 10
4 is a power supply for 101, 102, and 103, 105 is a bypass relay that directly connects the output of O/E converter 101 to E/O converter 102 when main power supply 108 of the port is off, and 106 is a receiving side code decoder. vessel, 1
07 is a transmitting side code converter, and 108 is a main power source of the port. When the main power to all ports is off, such as when starting up a system, the bypass relay 105 is located on the bypass side for all ports as shown in Figure 5, so the power-on signal is pulsed at the center port. It can be seen that when a signal is sent, it is transmitted to all ports and then returned to the central port. The operation according to the global power-on command in this state will be explained.

FIG. 6 shows a block diagram of the power-on sign pulse discriminator for each port, which is configured to be able to receive global commands. Figure 6 shows the 4th
Almost the same as the figure, there is a global number setter 85-2 in parallel with the port number setter 85-1, and the outputs of the coincidence detectors 86-1 and 86-2 between these setters and the output of the counter 84. The only difference is that is inputted to the power-on signal holding flip-flop 87 via an OR circuit 88.

The global power-on command is one that consists of, for example, X _T1 width pulses in FIG. Naturally, "X" is set in the global number setter 85-2 of each port. When a global power-on command is issued from the central port, the output of the coincidence detector 86-2 becomes "1" when "X" _T1 width pulses have been emitted and turned off. After this, when a _T2 width pulse is output, the output of the pulse width discriminator 83 becomes "1". At the time when this becomes "0", that is, when the _T2 width pulse is turned off, the power-on signal holding flip-flop 87 becomes "1". As explained above, this turns on the main power of the ports, so it can be seen that the main power of all ports connected to the system is turned on at the same time.

Note that the power supply 9 in Figure 2 and the power supply 104 in Figure 5 must be on whether the main power supply of the remote port is on or off, so the power supply to the main power supply of the remote port is active. When it is down, it is powered by this power supply, and when it is down, it is powered by a backup power supply from the central port or a remote port.

Furthermore, although this is not a requirement of the present invention, power-off of a port can be achieved by transmitting a data frame instructing the port to turn off the power, and resetting the power-on signal holding flip-flop 87 in FIG.

According to this invention, the power supply for the O/E converter and the power-on sign pulse discriminator is provided separately from the main power supply of the port, and since the power-on sign pulse discriminator does not operate with a normal data frame signal, it is Since only the power-on code pulse of the remote port is responded to, all remote ports can be powered up via the transmission line itself of the dataway system. Furthermore, if the power-on code pulse discriminator is provided with a global number identification function, it is possible to turn on the power to all ports at the same time.

The dedicated power-on sign pulse can have a much wider pulse width than the normal data frame pulse, so the power-on sign pulse discriminator circuit is
Since low power consumption elements such as CMOS can be used, the power supply capacity for the power-on sign pulse discriminator, which is always on, can be made sufficiently smaller than that of the main power supply.

Although the present invention is applicable to all data transmission devices using electrical transmission circuits, it is most effective when applied to optical data way systems.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the data way system, FIG. 2 is a block diagram showing an embodiment of the present invention, FIG. 3 is a waveform diagram of the power-on code pulse, and FIG. A block diagram showing a configuration example of a power-on sign pulse discriminator used in the invention,
FIG. 5 is a block diagram showing the overall configuration of the transmission circuit section of the remote port, and FIG. 6 is a block diagram showing another example of the configuration of the power-on sign pulse discriminator used in the present invention. Description of symbols, P1 to P5...port, Tij...terminal device, _l1 to _l5 ...transmission line, 1...transmission side code converter, 2...electrical to optical converter, 3...power-on code Pulse generator, 4... Power supply, 5... Transmission line, 6... Optical to electrical converter, 7... Receiving side code decoder, 8... Power-on code pulse discriminator, 9...
...Power supply, 10...Main power supply, 81...Buffer amplifier, 82...Pulse width discriminator, 83...Pulse width discriminator, 84...Counter, 85...Port number setter, 86...Coincidence detection circuit , 87...Power-on signal holding flip-flop, 101...Optical to electrical converter, 102... Electrical to optical converter, 10
3... Power-on code pulse discriminator, 104... Power source, 105... Bypass relay, 106... Receiving side code decoder, 107... Transmitting side code converter, 108... Main power source.

Claims (1)

[Claims] 1. A remote power-on method for a port in an optical dataway system in which a central port and a remote port are coupled via an optical transmission line, wherein the central port has data transmitted in a frame configuration over the transmission line. A pulse generator capable of generating a power-up code pulse having a pulse width larger than the data pulse independently of the pulse is provided, and the remote port has a frame configuration as a discriminator for the power-up code pulse. The power consumption is lower than that of the reception discriminator for the data pulses transmitted by the
It is equipped with a power-on sign pulse discriminator made of a CMOS element, and an auxiliary power supply with a smaller capacity than the main power supply is used in addition to the main power supply as an auxiliary power supply for driving at least the optical/electrical converter and the pulse discriminator. The pulse discriminator at the remote port generates a power-on pulse by receiving and discriminating the power-on code pulse sent from the pulse generator at the central port via the optical transmission line to the remote port. A remote power-on method for a port in an optical dataway system, characterized in that the main power of the port is turned on.