JPS6041900B2 - Transmission multiplexing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission multiplexing method in a communication system.

In the conventional transmission multiplexing system, as shown in Fig. 1, transmission lines 2 are individually connected between two transmitters 1 and 4 and two receivers 3 and 6.
, 5, and send information 8, 9 with the same content as shown in FIG.
were transmitted in parallel, and the output of one of the receivers was selected by a selector switch 7 and taken out.

Therefore, in a multiplexing system with such a configuration,
This is effective when the failure rates of transmitters 1 and 4, transmission lines 2 and 5, and receivers 3 and 5 are about the same, but if they are uneven, for example, the failure rate of the transmitter is , transmission line, and receiver, it is not optimal redundancy allocation to provide redundancy to the transmission line and receiver. An object of the present invention is to eliminate unnecessary redundancy, which is a drawback of the prior art described above, and to provide redundancy only to areas where the failure rate is especially high.

In other words, by multiplexing only the transmitters and using the redundancy of transmission codes to allocate part of the redundant codes to one transmitter, from the perspective of the receiving side, even if one transmitter becomes a failure, , the original code can be created by code redundancy.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described in detail below. The present invention provides at least two transmitters 1 as shown in FIG.
, 4 are connected to one transmission line 2, and the signals are sent to one receiver 3 through this transmission line 2.

The transmitters 1 and 4 receive the original signal code string 12 shown in FIG.
On the other hand, as a means for dividing the pulse, the code strings 13 and 14 are time-divided by logically multiplying the original signal and two clocks obtained by shifting the well-known 112 pulse width clock by 1 bit. The transmission information is shared and outputted via the encoder 10 that converts the information into the data. The output of the receiver 3 is a code restorer which restores the code strings 13 and 14 to the code string 12 with the original pulse width by taking a known majority vote or summation, which is also a means of integrating a plurality of pulses. code string 13, which is the transmission output from transmitters 1 and 4 via 11;
14 is restored to the original code string 12 and received. In the above process, even if the transmitter 4 fails and the code string 14 is no longer sent, the receiver 3 can receive the code string 13, so the original code string 12 can be encoded based on this code string. It can be decoded by the decoder 11. As described above, by utilizing code redundancy, the original code can be regenerated even if one transmitter completely fails.

In the example, transmitters are duplicated and the simplest redundant code is used, but it is also possible to use n-fold transmitters and use a more sophisticated redundant code. In this case, it is also possible to identify a faulty transmitter on the receiver side. For transmission lines and receivers that do not have redundancy, only one series is required;
Since the operating time of the transmitter is at least 112 seconds, the heat dissipation means can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an example of a conventional multiplex communication system, Fig. 2 is a waveform diagram showing an example of codes transmitted at that time, and Fig. 3 is a block diagram showing an embodiment of the multiplexing system of the present invention. 4 are waveform diagrams showing an example of the codes transmitted at that time. 1, 4... Transmitter, 2... Transmission line, 3... Receiver, 10... Code converter, 11... Code decoder.

Claims (1)

[Claims] 1 At least two or more transmitters, one transmission line and one
In a digital communication device consisting of two receivers, each transmitter transmits a transmission signal by giving a transmission time equal to the number of redundant transmitters in a time division manner, and the receiver transmits the transmission signal in a time division manner. A transmission multiplexing system characterized in that the original transmission signal is decoded by decoding the incoming transmission signal and taking the sum of the signals.