JPH01179532A - Period signal transmission system - Google Patents

Abstract

PURPOSE:To transmit a period signal without separate provision of a transmission line for a substantial signal by adding a 2-bit consecutive bipolar violation periodically at the sender side and detecting 2-bit consecutive bipolar violation at the reception side. CONSTITUTION:A B3ZS decoder 9 decodes a converted unipolar signal and outputs the result to a '11' pattern elimination circuit 12. Thus, the '11' pattern elimination circuit 12 deletes a '11' pattern inserted once per 204 bits of the decoded data, converts it into the original signal speed and a substantial signal is outputted from an output terminal 13. On the other hand, a 2-bit consecutive bipolar violation detection circuit 10 detects the 2-bit consecutive bipolar violation caused once per 5712 bits and the signal with the same period as the period signal sent from the sender side is extracted from the output terminal 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital transmission system, and particularly to a periodic signal transmission system that transmits periodic signals using bipolar violation.

[Conventional technology]

Conventionally, this type of periodic signal transmission system has provided a transmission path for transmitting the periodic signal, separate from a transmission path for transmitting the original signal.

[Problem to be solved by the invention]

The above-mentioned conventional periodic signal transmission method has a drawback in that a separate transmission path must be provided in addition to the transmission path for transmitting the original signal.

[Means to solve the problem]

The periodic signal transmission method of this invention is based on the period (TXN) to be transmitted at a specific multiple (to) of the period (1) of two consecutive bits of digital data "11" inserted into the digital data to be originally transmitted on the transmitting side. A bipolar violation is applied to two consecutive bits, and the receiving side receives this cycle (TXN
), a periodic signal is transmitted by detecting two consecutive bits of bipolar violation received at

[Effect]

The present invention can eliminate the need to provide a transmission path separate from the transmission path for transmitting the original signal.

〔Example〕

The figure is a block diagram showing an embodiment of the periodic signal transmission method according to the present invention. In the figure, 1 is a signal input terminal into which the original signal to be transmitted is input on the transmitting side; 2
For example, the period is 5712 bits (28 times 204 bits)
3 is the input terminal to which the transmission synchronization signal of 1 is input, and 3 is the 11 which converts the speed of the original signal input to signal input terminal 1 and inserts the 11 pattern at a rate of once every 204 bits.
'' pattern insertion circuit, 4 is a B3ZS encoder that adds bipolar violations for the B3ZS code, 5 is a bipolar violation of ``11'' multiplied once every 95712 bits by the input of the transmission synchronization signal. 2
A bit continuous bipolar violation addition circuit, 6 a unipolar-bipolar conversion circuit for converting into a bipolar signal, I a transmission line, 8 a bipolar-unipolar conversion circuit for converting the bipolar signal sent from the transmission line 7 into a unipolar signal, 9 is a B3ZS decoder that decodes this unipolar signal, 10 occurs once every 5712 bits 2
A 2-bit continuous bipolar violation detection circuit detects bipolar violation of continuous bits and outputs from an output terminal 11 a signal with the same period as the periodic signal sent out on the transmitting side; It is inserted once every 204 bits.
This is a "11" pattern deletion circuit that deletes the "11" pattern, converts it to the original signal speed, and outputs the original signal from the output terminal 12.

Next, the operation of the periodic signal transmission method with the above configuration will be explained. First, the "11" pattern insertion circuit 3 converts the speed of the original signal input to the signal input terminal 1 and inserts the "11" pattern once every 204 bits. Then, the B3ZS encoder 4 adds a bipolar violation for the B3ZS code to this signal. The 2-bit continuous bipolar violation addition circuit 5 is 571
By inputting a 2-bit transmission cycle signal! Multiply +5712 bits by a bipolar violation of "11" at a rate of once. Then, the unipolar-bipolar conversion circuit 6 converts this signal into a bipolar signal and sends it to the transmission line 7. On the other hand, on the receiving side, the bipolar signal sent from this transmission line 7 is processed by a bipolar-unipolar conversion circuit 8.
are input into B3ZS, converted to unipolar signals, and converted to unipolar signals.
The signal is input to a decoder 9 and a 2-bit continuous bipolar violation detection circuit 10. Therefore, the B3ZS decoder 9 decodes the converted unipolar signal into "11".
It is output to the pattern deletion circuit 12. For this reason, this “1
The "1" pattern deletion circuit 12 deletes the "11" pattern inserted once every 204 bits of this decoded data, converts it to the original signal speed, and outputs the original signal from the output terminal 13. Output a signal. On the other hand, the 2-bit continuous bipolar violation detection circuit 10 detects a 2-bit continuous bipolar violation that occurs once every 5712 bits, and outputs a signal with the same period as the periodic signal sent out on the transmitting side to the output terminal 11. It can be taken out from.

kThe above explanation deals with the case where a 5712-bit periodic signal is transmitted by inserting an "11" pattern once every 204 bits in digital transmission using a B3ZS code, but the invention is not limited to this. Of course.

〔Effect of the invention〕

As explained in detail above, according to the periodic signal transmission method according to the present invention, a 2-bit continuous bipolar violation is periodically added on the transmitting side, and the 2-bit continuous bipolar violation is detected on the receiving side. By doing so, the periodic signal can be transmitted without providing a transmission path separate from that for the original signal.

[Brief explanation of the drawing]

The figure is a block diagram showing an embodiment of the periodic signal transmission method according to the present invention. 1... Signal input terminal, 2... Transmission synchronization signal, 3
..."11" pattern insertion circuit, 4...B3Z
S encoder, 5... 2-bit continuous Ibora violation addition circuit, 6... Unipolar to bipolar conversion circuit, T... Transmission line, 8... Bipolar to unipolar conversion circuit, 9・Contest・B3ZS decoder, 10@
-... 2-bit continuous bipolar violation detection circuit, 11... Output terminal, 12... "11" pattern deletion circuit. Patent applicant Nippon Electric Co., Ltd.

Claims (1)

[Claims] A means for inserting 2-bit digital data "11" into the digital data that should originally be transmitted to the transmitting side;
means for multiplying bipolar violation by bit digital data "11"; means for detecting bipolar violation of the two consecutive bits on the receiving side; bipolar encoding of the digital signal and transmission; A periodic signal transmission method characterized by: