JPH04358430A - Transmission system for transmission quality information on pcm multiple converter - Google Patents

Abstract

PURPOSE:To attain the transmission of the code error information without using an external device which converts the form of data into the one suited for transmission no using a O-order group transmission line of a PCM multiple transmission line or an external transmission line. CONSTITUTION:An error arithmetic circuit 17 counts the code errors detected by an error detecting circuit and outputs the transmission quality information. A transmission quality information inserting circuit 18 inserts the transmission quality information received from the circuit 17 into an inter-multiframe station data link bit string of a primary group 24 and sends the information to a transmission quality information processor. A transmission quality information inserting circuit 21 inserts the transmission quality information received from the circuit 17 into the preceding bit string and then transmits the information to another station via a transmission line.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission quality information transmission method for a PCM multiplex conversion device, and more particularly to a transmission quality information transmission method for a PCM multiplex conversion device detected by a code error checking method.

0002

2. Description of the Related Art Conventionally, a transmission quality information transmission system for a PCM multiplex converter collects code errors detected by the PCM multiplex converter using an external device, converts them into a data format suitable for transmission, and then collects code errors detected by the PCM multiplex converter. Transmission was performed using the next PCM multiplex transmission line or an external transmission line.

0003

[Problem to be solved by the invention] The above-mentioned conventional PCM
In the transmission quality information transmission method of multiplex converter, code errors detected by PCM multiplex converter are collected by an external device,
Furthermore, it has the disadvantage that it must be converted into a data format suitable for transmission, and that it must use a zero-order PCM multiplex transmission path or an external transmission path.

[0004] An object of the present invention is to collect code errors detected by a PCM multiplex converter externally and to convert them into a data format suitable for transmission without the need for an external device.
In addition, PCM can transmit code error information without using a zero-order PCM multiplex transmission path or an external transmission path.
An object of the present invention is to provide a transmission quality information transmission method for a multiplex conversion device.

[0005]

[Means for Solving the Problems] The transmission quality information transmission system of the PCM multiplex converter of the present invention is connected to other stations via a transmission line to perform PCM multiplex transmission, and is equipped with an error detection circuit on the transmission line. In a transmission quality information transmission system of a PCM multiplex converter that detects and outputs code errors, (A) an error calculation circuit that counts code errors detected by the error detection circuit and outputs transmission quality information; (B) the error a first transmission quality information insertion circuit that inserts the transmission quality information outputted by the calculation circuit into a primary group 24 multiframe inter-office data link bit string and sends it to the transmission quality information processing device; (C) the error calculation circuit; A second step inserts the transmission quality information outputted by
The transmission quality information insertion circuit is configured to include a transmission quality information insertion circuit.

[0006]

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

FIG. 1 is a block diagram showing an embodiment of a transmission quality information transmission system of a PCM multiplex conversion apparatus according to the present invention.

The transmission quality information transmission system of the PCM multiplex converter of the present embodiment shown in FIG. , a frame separation circuit 14 that separates a frame signal from the unipolar pulse train 2 and outputs only the inter-office data link bit string 3 of the primary group 24 multiframes, a frame synchronization circuit 15 that synchronizes the converted unipolar pulse train 2, and a synchronization an error detection circuit 16 that detects code errors from the unipolar pulse train taken and outputs an error signal 6; an error calculation circuit 17 that counts code errors detected by the error detection circuit 16 and outputs transmission quality information 7; A transmission quality information insertion circuit (first transmission quality information insertion circuit) inserts the transmission quality information 7 outputted by the circuit 17 into the primary group 24 multi-frame inter-office data link bit string 3 and sends it out to the transmission quality information processing device. ) 18, 1 output from the transmission quality information insertion circuit 18
Next group 24 multi-frame inter-station data link bit string 4
A code conversion circuit 19 converts the bipolar pulse train 5 into a bipolar pulse train 5 and sends it to the transmission quality information processing device and other PCM multiplex converters of the local station, and converts the bipolar pulse train 8 received from other PCM multiplex converters of the local station into a primary group. Code conversion circuit 2 for converting into 24 multi-frame inter-office data link bit string 9
0, a transmission quality information insertion circuit (a second transmission quality information insertion circuit) 21, a code conversion circuit that converts the primary group 24 multi-frame inter-station data link bit string 10 output from the transmission quality information insertion circuit 21 into a bipolar pulse string 11 and sends it to other stations via the transmission path. It consists of 22.

Next, the operation will be explained.

In FIG. 1, a primary group bipolar pulse train 1 received from another station via a transmission path is transmitted to a code conversion circuit 1.
3 into a unipolar pulse train 2. The unipolar pulse train 2 is sent to a frame separation circuit 14 and a frame synchronization circuit 15. The frame separation circuit 14 separates a frame signal from the unipolar pulse train 2, and outputs only the inter-office data link bit string 3 of the primary group 24 multiframes to the transmission quality information insertion circuit 18. In addition, the frame synchronization circuit 15 also controls the converted unipolar pulse train 2.
are synchronized and output to the error detection circuit 16.

Next, the error detection circuit 16 detects code errors from the synchronized unipolar pulse train and generates an error signal 6.
is output to the error calculation circuit 17. The arithmetic circuit 17 counts the code errors detected by the error detection circuit 16 and outputs transmission quality information 7. The transmission quality information 7 outputted by the error calculation circuit 17 is then transmitted to the transmission quality information insertion circuit 1.
8 is inserted into the primary group 24 multiframe inter-office data link bit string and sent to the transmission quality information processing device. The primary group 24 multi-frame inter-office data link bit string 4 output from the transmission quality information insertion circuit 18 is as follows:
The signal is converted into a bipolar pulse train 5 by the code conversion circuit 19 and sent to the transmission quality information processing device and other PCM multiplex conversion devices of the local station. The transmission quality information processing device extracts transmission quality information 7 from the received bipolar pulse train 5 and processes it. Further, the bipolar pulse train 5 sent to another PCM multiplex conversion device of the local station is further sent to another station by the PCM multiplex conversion device.

On the other hand, the bipolar pulse train 8 received from another PCM multiplex converter of the own station is converted by the code conversion circuit 20 into a bit sequence 9 for a primary group 24 multi-frame inter-office data link. Then, the transmission quality information 7 outputted by the error calculation circuit 17 is transmitted to the transmission quality information insertion circuit 2.
1, the primary group 24 output from the code conversion circuit 20
It is inserted into the multi-frame inter-office data link bit string 9. Next, the primary group 24 multi-frame inter-office data link bit string 10 outputted from the transmission quality information insertion circuit 21 is converted into a bipolar pulse string 1 by the code conversion circuit 22.
1 and sent to other stations via the transmission path.

As described above, by providing the PCM multiplex conversion device with a circuit for counting detected code errors and a circuit for inserting transmission quality information into the inter-office data link bits of the primary group 24 multiframes, the transmission speed can be improved. It does not require any external equipment to convert the data into a format suitable for PCM.
Code error information can be transmitted without using a zero-order group transmission path of multiplex transmission paths or an external transmission path.

[0014]

As explained above, the transmission quality information transmission system of the PCM multiplex converter of the present invention includes a circuit for counting detected code errors and a circuit for counting detected code errors, and transmits the transmission quality information to the primary group 24. By providing a circuit that is inserted into the inter-office data link bit of the multiframe, there is no need for an external device to convert the data into a data format suitable for transmission. This has the advantage that code error information can be transmitted without using any transmission path.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a transmission quality information transmission method of a PCM multiplex conversion apparatus according to the present invention.

[Explanation of symbols]

13 Code conversion circuit 14 Frame separation circuit 15 Frame synchronization circuit 16 Error detection circuit 17 Error calculation circuit 18 Transmission quality information insertion circuit 19 Code conversion circuit 20 Code conversion circuit 21 Transmission quality information insertion circuit 22 Code conversion circuit

Claims (1)

[Claims] [Claim 1] A PCM connected to other stations via a transmission path.
In a transmission quality information transmission system for a PCM multiplex conversion device that performs multiplex transmission and is equipped with an error detection circuit to detect and output code errors on the transmission path, (A) the code errors detected by the error detection circuit are counted; (B) an error calculation circuit that outputs transmission quality information; (B) a circuit that inserts the transmission quality information outputted by the error calculation circuit into a bit string for a primary group 24 multiframe inter-office data link and sends it to a transmission quality information processing device; 1 transmission quality information insertion circuit, (C) the transmission quality information outputted by the error calculation circuit 2
4. A transmission quality information transmission system for a PCM multiplex converter, comprising: a second transmission quality information insertion circuit that inserts the bit string into a four-frame inter-office data link bit string and sends it to another station via the transmission path. .