JP2707584B2 - Multiplexer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used in the field of data communication.

The present invention relates to a multiplexing device, and more particularly, to a multiplexing device that propagates an error generated in a lower-order group of a transmitting unit to an output of a lower-order group of a receiving unit.

〔Overview〕

The present invention provides a multiplexing device that multiplexes a transmission unit low-order group input signal in a transmission unit and outputs the multiplexed signal, and separates the multiplexed signal in a reception unit and outputs the multiplexed signal as a reception unit low-order group output signal. The error detected on the transmitting unit low order group side is multiplexed with a predetermined first pattern signal in place of the transmitting unit low order group input signal and output as the multiplexed signal, and the receiving unit separates the multiplexed signal. Then, the first pattern signal is detected, the detected error is derived therefrom, and this error is inserted into a predetermined second pattern signal, and the received signal is received in place of the separated receiving unit low-order group output signal. By outputting the signal as a lower-order group output signal, errors generated in the lower-order group of the transmitting unit can be propagated to the output of the lower-order group of the receiving unit, and line switching of the connected device is possible. It was done.

[Conventional technology]

Conventionally, this type of multiplexing apparatus has a method in which an error generated and detected on the lower order group side of the transmitting unit does not propagate to the output of the lower order group side of the receiving unit.

[Problems to be solved by the invention]

In the above-described conventional multiplexing apparatus, the error generated and detected on the transmitting unit lower-order group side is not propagated to the receiving unit lower-order group side output. Cannot be detected by a device which is connected to the device and has means for switching the line when an error is detected by the receiving unit. For this reason, such a device has a disadvantage that the line cannot be switched to the spare side.

The object of the present invention is to eliminate the disadvantages mentioned above,
It is an object of the present invention to provide a multiplexer capable of propagating an error generated in a lower-order group of a transmitting unit to an output of a lower-order group of a receiving unit facing the same.

[Means for solving the problem]

The present invention includes a transmitting unit having a multiplexing unit that multiplexes a transmitting unit low-order group input signal and outputs a multiplexed signal, and a separating unit that separates the multiplexed signal and outputs a receiving unit low-order group output signal. A multiplexing apparatus including a receiving unit, wherein the transmitting unit detects an error of the transmitting unit low-order group input signal, and outputs a first error signal when detecting an error equal to or more than a predetermined error count value; A first pattern signal generation unit that generates and outputs a first pattern signal corresponding to the detected first error signal, and the transmission unit low-order group to the multiplexing unit by the first error signal A first selector for selecting whether to output an input signal or to output the first pattern signal, wherein the receiver detects the first pattern signal and detects the first pattern signal. The error count transmitted by A pattern signal detection unit that outputs a second error signal to be generated, a second pattern signal generation unit that generates and outputs a second pattern signal having a predetermined pattern that satisfies the coding rule of the low-order group signal, An error insertion unit that inserts the second error signal into the second pattern signal, and the second error signal replaces the error insertion signal with the reception unit low-order group instead of the reception unit low-order group output signal. And a second selector for selectively outputting as a group output signal.

[Action]

The error detection unit counts errors of the transmission unit low-order group input signal and outputs a first error signal. The first pattern signal generator generates and outputs a predetermined first pattern signal corresponding to the first error signal. For example, when the error count value is equal to or more than a predetermined value by the first error signal, the first pattern signal is transmitted to the multiplexing unit instead of the transmitting unit low-order group input signal. Output. The multiplexing unit multiplexes the first pattern signal and outputs the multiplexed signal.

The multiplexed signal is separated by a separation unit. The pattern signal detection unit detects the first pattern signal separated by the separation unit, and outputs a second error signal according to the error count value inserted by the transmission unit. The error insertion unit outputs an error insertion signal obtained by inserting the second error signal into a second pattern signal having a predetermined pattern generated by the pattern signal generation unit. When the second error signal is input, the second selection unit selects the error insertion signal, and when the second error signal is not input, outputs the reception unit low-order group output signal from the separation unit. And outputs the selected signal as a lower-order group output signal of the receiver.

Therefore, an error that has occurred on the low-order side of the transmitting unit can be propagated to the low-order side output of the receiving unit. This also enables line switching in the receiving unit of the connected device.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

 FIG. 2 is a block diagram showing an embodiment of the present invention.

This embodiment includes a transmitting unit 10 and a receiving unit 20.
The transmission unit 10 receives the transmission unit low-order group input signal 101, counts errors thereof and outputs a first error signal 102, and an error detection unit 11 that receives the first error signal 102 and outputs a first error signal 102. A first pattern signal generating unit 12 for generating and outputting one pattern signal 103; and a second unit for selectively outputting one of the transmitting unit low-order group input signal 101 and the first pattern signal 103 according to the first error signal 102. One selector 13 and selector 13
And a multiplexing unit 105 that multiplexes the output signal 104 of FIG.

The receiving unit 20 receives the multiplexed signal 105 output from the transmitting unit 10.
, A separation unit 21 that inputs and separates, a pattern signal detection unit 24 that detects the separated first pattern signal 103 and outputs a second error signal 109, and a second pattern signal 107 having a predetermined pattern. A second pattern signal generation unit 22 that generates and outputs a second error signal; an error insertion unit 23 that inserts a second error signal 109 into the output second pattern signal 107 and outputs an error insertion signal 108; Separation unit 21 by signal 109
And a second selection unit 25 that selects the error insertion signal 108 instead of the reception unit low-order group output signal and outputs the selected signal as the reception unit low-order group output signal 110.

The feature of the present invention, in the figure, in the transmission unit 10, provided an error detection unit 11, a pattern signal generation unit 12 and a selection unit 13,
In the receiving unit 20, a pattern signal generating unit 22, an error inserting unit 23,
That is, the pattern signal detecting section 24 and the selecting section 25 are provided.

 Next, the operation of this embodiment will be described.

In the transmission unit 10, the transmission unit low-order group input signal 101
And input to the error detection unit 11. Error detector 11
Counts errors of the transmission unit low-order group input signal 101,
The count result is output to the pattern signal generator 12 and the selector 13 as a first error signal 102, respectively.
The pattern signal generator 12 outputs a first pattern signal 103 corresponding to the error count result of the first error signal 102 to the selector 13. The selecting unit 13 selects the first pattern signal 103 when the first error signal 102 is equal to or more than a predetermined error count value, and when the first error signal 102 is smaller than the predetermined error count value, the transmitting unit low-order group input. The signal 101 is selected and output as the output signal 104. The output signal 104 of the selector 13 is multiplexed by the multiplexer 14.

In the receiving unit 20, the demultiplexing unit 21 receiving the multiplexed signal 105
Separated by The separated output signal 106 of the separation unit 21
Is input to the selection unit 25 and the pattern signal detection unit
Entered in 24. When detecting the separated first pattern signal 103, the pattern signal detection unit 24 returns the error count value corresponding to the pattern inserted by the transmission unit 10 from the detected pattern, and inserts the second error signal 109 into an error. Output to the unit 23 and the selection unit 25. The pattern signal generator 22 generates a second pattern signal 107 that satisfies the coding rule of the low-order group output signal. The error insertion unit 23 outputs an error insertion signal 108 obtained by inserting an error into the second pattern signal 107 in accordance with the error count value of the second error signal 109. When the second error signal 109 is input, the selection unit 25 selects the error insertion signal 108 instead of the reception unit low-order group output signal, and outputs it as the reception unit low-order group output signal 110.

〔The invention's effect〕

As described above, the present invention provides
There is an effect that an error detected on the low-order group side of the transmission unit of the multiplexer can be propagated to the output of the low-order group side of the reception unit.

Therefore, in a device which is connected to the lower-order group side of the multiplexing device and detects and switches an error occurring in the line at the receiving unit, line switching becomes possible, and the effect is great.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. 10 transmission section, 11 error detection section, 12, 22 pattern signal generation section, 13, 25 selection section, 14 multiplexing section, 20
...... Reception unit, 21 ... Separation unit, 23 ... Error insertion unit, 24 ...
... Pattern detection unit, 101 ... Transmission unit low-order group input signal, 10
2, 109 ... error signal, 103, 107 ... pattern signal, 10
4 output signal (of the selector 13), 106 (output of the separator 21)
Output signal, 108... Error insertion signal, 110...

Claims (1)

(57) [Claims] A transmitting section having a multiplexing section for multiplexing a low-order group input signal of the transmitting section and outputting a multiplexed signal;
A receiving section (20) having a separating section (21) for separating the multiplexed signal and outputting a receiving section low-order group output signal, wherein the transmitting section comprises: An error detection unit (11) for detecting a signal error and outputting a first error signal when detecting a predetermined error count value or more, and generating and outputting a first pattern signal corresponding to the detected first error signal A first pattern signal generating unit (12) to perform, and whether to output the low-order group input signal of the transmitting unit or the first pattern signal to the multiplexing unit based on the first error signal. A receiving unit, which detects the first pattern signal and outputs a second error signal corresponding to the error count value transmitted in the first pattern signal. Pattern signal detector (24) Second pattern signal generator for the second generation and output a pattern signal having a predetermined pattern satisfying the coding rule of the group signals (2
2), an error insertion unit (23) that inserts the second error signal into the output second pattern signal, and the second error signal replaces the reception unit low-order group output signal with the second error signal. A second selection unit (25) for selectively outputting an error insertion signal as the reception unit low-order group output signal.