JPH01216634A - Transmission system - Google Patents

Abstract

PURPOSE:To evade the loss of decorative appearance due to wiring and to simplify the wiring work by constituting a spatial transmission unit for satellite and a spatial transmission unit for terminal. CONSTITUTION:The system consists of a transmission section 4 provided with an optical transmission section 2 and an optical reception section 3 corresponding to a spatial transmission units for satellite 11, 12,... and relay transmission sections 7a, 7b provided with a relay transmission section 5 and a relay respectively section 6 corresponding to the other spatial transmission units for satellite 11, 12,... arranged at both sides of the transmission section 4. A transmission signal from a work station at the sender side is sent to a work station connecting to the relevant transmission line through the transmission line at the ground side and sent to the spatial transmission units for terminal. The signal is received by the relay reception section of the spatial transmission units for satellite and converted into an optical pulse signal by the optical transmission section again and sent to the spatial transmission units for terminal at the ground side corresponding thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Applications 1] The present invention relates to a transmission system that configures a LAN using personal computers and the like.

[Prior art] Conventionally, in the case of a LAN using a personal computer as a workstation controller, a wired transmission system was used, so the transmission line was wired between two nearby work stages using floor wiring or desk wiring, and a wired transmission line was installed between nearby work stages using floor wiring or desktop wiring. Work stay 2
Wiring between 32 and another 7A Ahe is achieved by ceiling X wiring, which is done by raising and lowering the wiring to the ceiling there were.

Therefore, the present inventors used optical space transmission to eliminate the need for up-down wiring and down-down wiring between the floor or desk on the ground side and the ceiling We have already proposed building a transmission system as shown in the figure.

This transmission system includes an optical transmitter that converts the transmission signal from the transmission line to of the wired transmission system installed on the back side of the ceiling an optical receiver that demodulates the signal into a transmission signal of the wired transmission system and sends it to the transmission line 10 of the wired transmission system;
A space transmission unit for satellites consisting of an interface means for electrically connecting between 1. ．． 12. ...
are provided on the ceiling X surface side, and a plurality of work stage tongues 211 to 213, 22. are provided on the ground side. ~221. ...
Transmission line 1Il121 of the wired transmission system that connects...
a transmission line 1 of the wired transmission system, which receives the optical pulse signal from the optical space transmission system and demodulates it into a transmission signal of the wired transmission system;
．． ．． 1. . . . and the transmission lines 11t, 12t, and the wired transmission system.
A terminal space transmission unit 31, 32, and an interface means for electrically connecting between...
... as the above satellite spatial transmission unit 1. .

12, . . , on the ground side in a one-to-one correspondence.

[Problem to be solved by the invention] However, in this transmission system, transmission signals between the satellite space transmission units (Lwlz*) are sent and received through the transmission line 10, so the problem is that the simplification of wiring work cannot be taken advantage of. was there.

The present invention has been made in view of the above-mentioned problems, and eliminates the need for rising and falling wiring between the floor or desk top and ceiling on the ground side, thereby saving the labor of wiring work and reducing the aesthetic appearance. The purpose of this invention is to provide a transmission system that does not require wiring work behind the ceiling while ensuring the characteristics of optical space transmission that is not available before.

[Means for Solving the Problems 1] The present invention consists of a space transmission unit for satellites arranged on the ceiling side, and a space transmission unit for terminals arranged on the ground side corresponding to the space transmission unit for satellites on the ceiling side. , the satellite space transmission unit includes an optical transmitter that converts a transmission signal into an optical pulse signal and sends it to the corresponding terminal space transmission unit, and a light pulse signal that receives the optical pulse signal from the corresponding terminal space transmission unit. An optical receiving section that demodulates the transmission signal, a relay transmitting section that converts the transmission signal into an optical pulse signal and sends this optical pulse signal to the corresponding adjacent satellite spatial transmission unit, and a corresponding adjacent spatial transmission unit for the satellite. A relay receiving section is provided which receives the optical pulse signal of the optical pulse signal and receives the transmission signal, and uses the transmission signal received and demodulated by the optical receiving section or the relay receiving section as the transmission signal taken into the relay transmitting section. The transmission signal received and demodulated by the relay reception unit is used as the transmission input to the transmission unit, and each terminal space transmission unit receives the transmission signal from the transmission line of the wired transmission system that connects multiple work stage tongues arranged on the ground side. The optical transmission unit converts the transmission signal into an optical pulse signal and sends it to the corresponding satellite spatial transmission unit, and the wired transmission system receives the optical pulse signal from the optical transmission unit of the corresponding satellite spatial transmission unit. It includes an optical receiver that demodulates the transmission signal and sends it to the transmission line of the wired transmission system, and an interface means that electrically connects the optical transmitter and the optical receiver to the transmission line of the wired transmission system. It is something.

[Operation] When transmitting data, a certain work stage 1
When performing bidirectional transmission between one of the work stage wheels to which a group belongs and the remaining work stations in the group and the work stage wheels of other work stage tongue groups, follow the steps below. It will be done. In other words, the transmission signal from the work stage tongue on the transmission side is transmitted by the transmission line on the ground side to the work stage tongue connected to the transmission line, and is also transmitted to the terminal space transmission unit. The transmission signal transmitted to the terminal space transmission unit is converted into an optical pulse signal by the optical transmitter of this terminal space transmission unit, and is transmitted to the corresponding satellite space transmission unit on the ceiling side by optical space transmission. The optical receiver of this satellite spatial transmission unit receives the transmitted optical pulse signal, and the received signal extracted by this optical receiver is transmitted as an optical pulse signal to the adjacent satellite spatial transmission unit by the relay transmitter. be done. After this optical pulse signal is received by the relay reception section of the satellite space transmission unit, it is again converted into an optical pulse signal by the optical transmission section and transmitted to the corresponding terminal space transmission unit on the ground side. The optical receiver of the space transmission unit for the terminal converts the transmitted optical pulse signal back into a transmission signal for the wired transmission system on the ground side, transmits it, and sends it to the corresponding work stage via the line. Similarly, the reception signal of the above-mentioned relay reception unit is converted into an optical pulse signal by the relay transmission unit, and is further relayed to another spatial transmission unit for satellite.

[Example] The present invention will be explained below with reference to Examples.

FIG. 1 shows an embodiment of the present invention, in which space transmission for satellites (22)1. ．． 1. ... is a terminal space transmission unit as shown in Figure 2)1. ．． A transmission section 4 equipped with an optical transmission section 2 and an optical reception section 3 corresponding to 1□..., and other satellite space transmission units placed on both sides of the transmission section 4) It is composed of a relay transmitting section 7a*7b having a corresponding relay transmitting section 5 and a relay receiving section 6.

On the ground side, each transmission line is 11° and 12° as in the conventional example.
Work stages 2z-2, 213, . . . , each consisting of a plurality of personal computers, are connected to 9 . . . , respectively. Also, each transmission line 1. ．． b... is the above-mentioned satellite space transmission unit) 1. ．． 1. A space transmission unit for a terminal whose light transmitting and receiving directions correspond to the transmitting section 4 of...)3. ．． 3. ...is connected.

Figure 3 shows the circuit configuration of the terminal space transmission unit 3, which includes an optical transmitter 8 that converts a transmission signal such as the NZRI code into an optical pulse signal and transmits it, and an optical transmitter 8 that converts the received optical pulse signal into a transmission signal. A transmission signal consisting of an NZRI signal transmitted via the transmission line 1 is provided as an electrical interface means between the optical transmission section 8 and the optical reception section 9 and the transmission line 1. A line receiver 10 for R8-422, for example, constitutes a reception date for passing or blocking the signal to the optical transmitter 8, and a transmission date, for example, for passing or blocking the received and demodulated transmission signal through the transmission line l. R3-
422 line driver 11, a line driver/receiver switching circuit 12 that switches between the line receiver 10 and the line driver 11, a transmission signal detection circuit 13 that detects a transmission signal for switching, and a reception signal detection circuit 13 that detects a transmission signal for switching. It also includes a received signal detection circuit 14 that detects signals. The workstations 211 to 213°... are equipped with a line receiver (not shown) that takes in the transmission signal, a line driver (not shown) that sends out the transmission signal, and a signal processing circuit (not shown) that processes the signal. (not shown).

On the other hand, as shown in FIG. 4, the transmission section 5 of the spatial transmission unit for satellite 1+*1z..., as shown in FIG. Line driver 11, line driver/
It is equipped with a receiver switching circuit 12, a transmission signal detection circuit 13, and a reception signal detection circuit 14, and has relay transmission sections 7a, 7.
It is connected to b via a line. In addition, each relay transmission section 7
m, 7b is equipped with a relay transmitter 5 which has a similar configuration and operates in the same manner as the optical transmitter 8, and a relay receiver 6 which has a similar configuration and operates in the same manner as the optical receiver 9. Receiver 10, line driver 11, line driver/receiver switching circuit 12, transmission signal detection circuit 13
, a received signal detection circuit 14.

As shown in FIG. 1, for example, when a transmission signal is transmitted from the work stages 1 and 2, the transmitted signal is sent to the terminal space transmission unit 3 through the transmission line 11 on the ground side. Transmission line along with being conveyed to! , to workstation 2.21213 connected to . and terminal space transmission unit 3. The transmission signal is detected by the transmission signal detection circuit 13, and the driver/receiver switching circuit 12 sends the transmitted transmission signal to the optical transmitter 8 based on this detection, and the optical transmitter 8 converts the transmission signal into an optical pulse signal. It is converted and transmitted to the corresponding satellite space transmission unit 1 on the ceiling X side by optical space transmission.

Here, data transmission is performed in half duplex, so the transmission section 4
In the spatial transmission unit 11 which receives the optical pulse signal at the optical receiver 9, the received signal is demodulated into a transmission signal by the optical receiver 9, and this demodulated transmission signal is sent to the driver/receiver by the detection output of the reception signal detection circuit 14. s of cutting circuit 12
! & is sent to the line receiver 11, sent out on the line, and sent to each relay transmission section 7 at Tb. Here, these relay transmission units 7 at Tb are spatial transmission units 3. The relay transmitter 5 converts the transmission signal into an optical pulse signal again by operating in the same manner as described above, and the relay transmitter 7b transmits it to the adjacent relay transmitter 7& of the satellite spatial transmission unit 1□ by optical space transmission. The relay transmission section 7a of the satellite space transmission unit 12 is the above-mentioned space transmission unit 1. The same unit 12 demodulates the received signal in the same manner as
The signal is sent to the relay transmission section 7b and the transmission section 4, which are provided at the same time, through a line.

In the transmission section 4, the above-mentioned terminal space transmission unit 3. It works in the same manner as above, and transmits the transmission signal as an optical pulse signal to the terminal space transmission unit 32 on the ground side by optical space transmission. Similarly, each satellite spatial transmission unit 1. ...The transmission signal is converted into an optical pulse signal by the function of the relay transmission sections 7a and 7b, and is sequentially relayed to each satellite space transmission unit, and is similarly transmitted to the corresponding terminal space transmission unit by optical space transmission. It is sent.

The space transmission units for each terminal (32-33) work in the same way as the space transmission unit II for the satellite, and convert the received optical pulse signal into a transmission signal for the wired transmission system again, and each transmission line ff12t... * to each workstation 221... In other words, the data sent from workstation 211 has been transmitted to all workstations.

[Effects of the Invention 1] Since the present invention constitutes a space transmission unit for a satellite and a space transmission unit for a terminal as described in Part 1,
There is no need to run a transmission line from the ground side to the ceiling, or vice versa, as in the past.
In addition, since the relay transmitting section and the relay receiving section transmit signals between the satellite space transmission units using optical space transmission, there is no need for transmission line wiring in the ceiling, which simplifies the wiring work and improves the aesthetic appearance of the wiring. It also has the effect of solving the problem.

[Brief explanation of the drawing]

Figure 1 is a circuit configuration diagram of an embodiment of the present invention, PpJ2 is a configuration diagram of the satellite space transmission unit used in the above, Figure 3 is a circuit diagram of the terminal space transmission unit used in the above, and Figure 4 is FIG. 5 is a circuit configuration diagram of the satellite space transmission unit used in the above, and FIG. 5 is a configuration diagram of a conventional example. 1, ... is a space transmission unit for satellite, 21°.
... is a workstation, 3.1... is a terminal space transmission unit, 4 is a transmission section, 5 is a relay transmission section, 6
7a and 7b are relay receiving sections, 8 is an optical transmitting section, 9 is an optical receiving section, e+tlz*, etc. are transmission lines, and X is a ceiling. Agent Patent Attorney Ishi 1) Chief 711... is the satellite spatial transmission unit 2.1...
Work stage 1 3 □ . . . Terminal space transmission unit 4, transmission section 5, relay transmission fs section 6, relay reception section 7m, 7b, relay transmission section 8, optical transmission section 9, optical reception section 1, ．． 12.13... is the transmission line, X is the ceiling Figure 1 s2 Figure 3 Council Figure 4 Figure 5 View

Claims (1)

[Claims] (1) Consists of a satellite spatial transmission unit installed on the ceiling side, and a terminal spatial transmission unit installed on the ground side corresponding to the satellite spatial transmission unit on the ceiling side. an optical transmitter that converts a transmission signal into an optical pulse signal and transmits it to a corresponding spatial transmission unit for a terminal; and an optical receiver that receives an optical pulse signal from a corresponding spatial transmission unit for a terminal and demodulates the transmission signal. , a relay transmitter that converts the transmission signal into an optical pulse signal and sends this optical pulse signal to the corresponding adjacent spatial transmission unit for satellite, and a relay transmitter that receives and transmits the optical pulse signal from the corresponding adjacent spatial transmission unit for satellite. A relay receiving section that demodulates the signal is provided, and uses the transmission signal received and demodulated by the optical receiving section or the relay receiving section as a transmission signal taken into the relay transmission section, and as a transmission signal taken into the optical transmission section. Using the transmission signal received and demodulated by the terminal, the space transmission unit for each terminal converts the transmission signal from the transmission line of the wired transmission system that connects multiple workstations installed on the ground side into an optical pulse signal. An optical transmitter sends out to the spatial transmission unit for a satellite, and receives an optical pulse signal from the optical transmitter of the corresponding spatial transmission unit for a satellite, demodulates it into a transmission signal for a wired transmission system, and sends it to the transmission line of the wired transmission system. What is claimed is: 1. A transmission system comprising: an optical receiving section that transmits signals to the optical receiver; and an interface means that electrically connects the optical transmitting section and the optical receiving section to a transmission line of a wired transmission system.