JPH02220530A - Optical communication system - Google Patents

Abstract

PURPOSE:To form an efficient optical communication system by reducing power consumption as the entire system and allowing a master station to identify a slave station when an optional slave station sends a data to the master station. CONSTITUTION:A detection means 6 detects a reference voltage included in a data from an optional slave station 11, and when the voltage is within a 1st voltage range, the means 6 supplies a signal representing the reception mode receiving the data to a controller 5, and the controller 5 controls a power supply device 4 to send a power voltage to the reception section 2 only. On the other hand, the detection means 6 detects the reference voltage as to which 2nd voltage range in the 2nd voltage ranges equal to number of slave stations belongs to identify the slave station 11. A reference voltage generator 14 of each slave station 11 sends a reference voltage within the 2nd voltage range different from slave stations 11 in the transmission mode. Since power voltage is supplied to the transmission section only in the transmission mode in the master station and supplied to the reception section only in the reception mode, the power consumption as the entire optical communication system is reduced and the slave station being a source is identified in the reception mode.

Description

[Detailed Description of the Invention] (Required II) Regarding an optical communication system that performs optical communication between a master station and a plurality of slave stations, it is possible to reduce the power consumption of the optical communication system as a whole, and to av4 when sending data to the station
In an optical communication system comprising a master station having a receiving section, a transmitting section and a power supply means, and a plurality of slave stations having a receiving section and a transmitting section. , the master station supplies power supply voltage only to the transmitting section in the transmission mode in which data is transmitted to any slave station! The receiving unit is configured by supplying a signal indicating a reception mode for detecting a reference voltage from an arbitrary slave station and receiving data when the reference voltage is within the first N pressure range to the 61119 means. control the power supply means so as to supply the power supply voltage only to the slave stations, and detect which of the second voltage ranges the number of which is equal to the number of slave stations the reference voltage falls within. Each slave station has a reference voltage generating means for transmitting a reference voltage that is within a second voltage range that is different from that of other slave stations in the sending r mode, The range is set and configured to include all the second voltage ranges.

[Industrial application field]

The present invention relates to an optical communication system, and particularly to an optical communication system that performs optical communication between a master station and a plurality of slave stations.

[Prior art] In a conventional optical communication system, when performing optical communication between a master station and any one of a plurality of slave stations, when transmitting data from the master station to any slave station, the master station's At the same time as the power is turned on, the receiving section of any slave station is turned on from the master station. Thereby, the power consumption of the optical communication system as a whole can be minimized. Also, when transmitting data from any slave station to the master station, the power of the master station is turned on. here,
The state in which the power of the master station is on refers to the state in which the power to the transmitting section and the receiving section of the master station are on.

For example, when transmitting data from any slave station to 12 stations,
The receiving section of the master station must be powered on, but
The power of the transmitter of the master station is turned on even though it does not need to be turned on.

For this reason, the power consumption of the optical communication system as a whole is relatively large because the power to parts that are not actually used is also turned on.

In addition, when transmitting data from any slave station to the master station, 1
In the two stations, it is not possible to identify from which slave station the received data was transmitted.

[Problem to be solved by the invention]

Therefore, in conventional optical communication systems, the power consumption of the system as a whole is relatively large, and when data is transmitted from any slave station to the master station, the received data is There was also the problem that it was not possible to identify from which slave station the message was transmitted.

The present invention aims to provide an optical communication system that can reduce the power consumption of the optical communication system as a whole and also make it possible to identify a slave station in 112 stations when transmitting data from any slave station to a master station. purpose.

[Means to solve the problem]

FIG. 1 is a diagram explaining the principle of the present invention. In the figure, 1 is a master station, and a receiving unit 2. Transmission unit 3. It has one power supply stage 4.1111 means 5 and detection means 6. 11 is a slave station, which includes a receiving section 12. The transmitting section 13 and the reference voltage generating means 14 are shown on the right.

[Effect]

The control means 5 controls the power supply means so as to supply the power supply voltage only to the transmitter 3 in a transmission mode in which data is transmitted to an arbitrary slave station 11. The detection means 6 detects the reference voltage from any slave station 11, and when the reference voltage is within the first voltage range, it supplies the control means 5 with a signal representing a reception mode in which data is received. 'R1Q voltage is supplied to the power supply means 4, and by detecting which second voltage range the reference voltage falls within, which is the number of second voltage ranges equal to the number of slave stations. Identify station 11. Base 11 of each slave station 1! Voltage generating means 14
In the transmission mode, transmits a reference voltage within a second voltage range that is different from that of other slave stations 1.

The first voltage range is set to include all the second voltage ranges.

As a result, in the master station, the electrical voltage is supplied only to the transmitting section in the transmitting mode, and only to the receiving section in the receiving mode, reducing the power consumption of the optical communication system as a whole. A slave station can be identified.

〔Example〕

FIG. 2 shows a schematic configuration of an embodiment of the present invention, FIG. 3 shows an embodiment of a master station, and FIG. 4 shows an embodiment of a slave station.

In FIG. 2, the master station 1 is connected to an optical branching device 21 via an optical fiber cable 23, and the optical branching device 21 is connected to the slave stations 111 to 11 . is connected to. Also, children 8111-11. G is connected to an optical coupler 22 via an optical fiber cable 26, and the optical coupler 22 is connected to the master station 1 via an optical fiber cable 24. As a result, the parent Ell and 'F station 11. ~1
1. Optical communication can be carried out between

In FIG. 3, the master station 1 includes an optical branching device 31. connected to an optical fiber cable 24. Optical-electrical converter 30° comparison section 460~
460. Receiving unit 371 display device 381-3B, ,'
IAmtADB device 39. Comparison section 47° terminal 43. It consists of a transmitter 44 and an electro-photometer 45 connected to the optical fiber cable 23.

Comparison unit 46 (l-1 to n) is optical-electrical converter 32
1. Amplifier 339. Comparator 34. ．． 35. and AND circuit 36. Consisting of The comparator 47 includes a first and a fourth comparator consisting of a quantifier 40, 41 and an AND circuit 42.
In the figure, slave station 11. ~11n are shown as slave stations 11 because they have the same configuration.

Is the slave station 11 optical? , an optical splitter 51 . connected to the fiber cable 25 . Optical to electrical converters 52, 53, electrical to optical converters 54 connected to fiber optic cable 26. Receiving section 5
5. Transmission unit 56. Intensifier 57° Comparator 58, 59, 6
3.64, AND circuit 60゜62, power supply controlled iIl device!
f61, and a terminal 65.

First, tA! :41 to any slave station 11 will be described. Since the terminal 43 of this platform and the master station 1 outputs the reference voltage p voltage vp such that v < v < Vb, the AND circuit 42 outputs the signal v1
is output. Thunder [ti111! lR[39c, signal v
When 1 is supplied, only the power to the transmitter 44 is turned on, so that the master station 1, which is the source, is set to a state in which data can be transmitted (transmission mode). In this state, the receiver 3
Motosuzu against 7 is off and Natsu. Thereby, the reference voltage V' from the transmitter 44 is supplied to each slave station 111 to 11o via the electro-optical converter 45, the optical fiber cable 23, and the optical coupler 21.

Here, for convenience of explanation, suppose that data is transmitted to the slave station 11 shown in FIG.
The output voltage of the amplifier 57 v1. is V, < V p, <
It is set to be V tb. .

As a result, the AND circuit 60 outputs the signal vR, and 1! The source control device 61 responds to the signal vR by transmitting the signal to the receiving section 55.
Turn on only the power to the In this state, the power to the transmitter 56 is turned off. As a result, the destination child 811 is now able to receive data transmitted from station a 1! (reception mode).

Note that the above 'IIi pressure v01 is determined by the comparator 585 of another slave station.
Since it is outside the range defined by the two reference voltages supplied to the comparators corresponding to 9 and 9, the reception ff1 mode is not set for slave station numbers other than the destination.

Next, the operation when transmitting data from any slave station 11 to the master station 1 will be explained. For convenience of explanation, suppose that data is transmitted from the slave station 811 shown in FIG.
The terminal 65 of is at the reference voltage V, which is vd x v, x ■. Output. Therefore, the signal vu is output from the AND circuit 62 and supplied to the power supply control device 39. Power control device 39
turns on only the power to the transmitter 56 in response to the signal vu, so the source l811 is set to transmit mode. In this state, the power to the receiving section 55 is turned off. As a result, the base tI! from the transmitter 56 is transmitted.
Voltage ■. ' is supplied to the IIA station 1 via an electrical-optical switch 54, an optical branch 22, and an optical fiber cable 24.

The above reference voltages v, t are tI when the output voltage V of the m-width amplifier 33o of the slave station 1 is v . , <V, set cl
1. As a result, the AND circuit 36G outputs the signal V, and the power supply control device 39 turns on only the power to the receiving section 37 in response to the signal V. In this state, the power to the transmitter 44 is turned off.

As a result, the master station 1 is set to receive mode. Note that the reference voltage from all slave stations 11° to 11o to master station 1 is V.
l, V.

Therefore, if the master station 1 is the destination, the power to the receiving unit 37 is turned on and the receiving unit 37 is automatically set to receive (-mode).

In this embodiment, the slave station 11. The reference voltage from v −■
Within the range of , the reference voltage la 1b from the slave station 811□ is within the range of v2a~■2-... from the slave station 11o! 3
The quasi voltage is V. , ~vnb, and these mutually different ranges v1. ~v1b, v2. ~v2b...
・vo.

~V is all set within the range of V, ~■o. Therefore, if the source is the slave station 111, for example, the AND circuit 361 outputs the signal S1, and the display device 38 displays that the source is the JJ3111. In other words, the comparators 461 to 46o have sources that are slave stations 111 to 1, respectively.
1o or not.

FIG. m5 and FIG. 6 each show an embodiment of the power supply control device 39. Note that since the power supply control device 61 may have the same configuration as the power supply control device 39, illustration and description thereof will be omitted.

In FIG. 5, the power source from a single power source 72 is the signal v
When the signal v is input, it is supplied to the transmitter 44 through the switch 71, and when the signal v is input, it is supplied to the receiver 1 through the switch 71.
1537.

In FIG. 6, two power supplies 74 and 75 are provided,
The control unit 73 turns on only the power supply 74 for the transmitting unit 44 when the signal v1 is received, and turns on only the power supply 75 for the receiving unit 37 when the signal V is received.

Although the present invention has been described above using examples, the present invention can be modified in various ways according to the gist of the present invention, and these are not excluded from the present invention.

C Effects of the Invention] According to the present invention, since the reference voltage is used to control the power on/off of the destination station, only the necessary power is turned on, reducing the power consumption of the optical communication system as a whole. In addition, when data is transmitted from any slave station to the master station, the master station can identify the source slave station, which is extremely useful in practice.

[Brief explanation of the drawing]

Fig. 1 is a diagram illustrating the principle of the present invention, Fig. 2 is a block system diagram showing a schematic configuration of an embodiment of the invention, Fig. 3 is a diagram showing an embodiment of a master station, and Fig. 4 is a slave station. FIG. 5 and FIG. 6 are diagrams each showing an embodiment of the power supply control device. In the figure, 1 is a parent bird, 2.12 is a receiving section, 3.13 is a transmitting section, 4 is one stage of power supply, 5 is 1IlIIID means, 6 is a detection means, 11.1i1 to 11o are slave stations, 14 is a reference voltage Generating means, 21 is an optical branching device, 22 is an optical coupler, 23 to 26 are optical fiber cables, 37.55 is a receiving section, 44.56 is a transmitting section, 39.61 is a power supply control device, 43.65 is a terminal , 460-46n, 47 is a comparison section, 381-38. 71 is a display device, 71 is a switch, 72, 74, 75 is a power supply, and 73 is a control unit.

Claims (1)

[Claims] A master station (1) having a receiving section (2), a transmitting section (3) and a power supply means (4), and a slave station having a receiving section (12) and a transmitting section (13). (11
), the master station (1)
includes a control means (5) for controlling the power supply means (4) so as to supply power supply voltage only to the transmitter (3) in a transmission mode for transmitting data to an arbitrary slave station (11); By detecting the reference voltage from the slave station (11) and supplying to the control means a signal representing a reception mode in which data is received when the reference voltage is within the first voltage range, the power supply voltage is applied only to the reception unit (2). The slave station is identified by controlling the power supply means so as to supply the slave station, and detecting which second voltage range the reference voltage falls within among a number of second voltage ranges equal to the number of slave stations. each slave station has a reference voltage generating means (14) for transmitting a reference voltage within a second voltage range that is different from that of other slave stations in the transmission mode; An optical communication system characterized in that the first voltage range is set to include all the second voltage ranges.