JP2638696B2 - Transmission line error monitoring method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention, it of a plurality of signal lines
That the transmission path from the transmitting side through the case of transmitting signals <br/> No. through each receiving side sequentially transfer sending passage is or becomes shorted state, signal transmission circuit provided in a transmission line, signal different transmission path, such as may become impossible to transmit the signal a malfunction such as a receiving circuit
The present invention relates to a transmission line abnormality monitoring method for detecting a normal state.

[0002]

2. Description of the Related Art Conventionally, the following are examples of this type of transmission line abnormality monitoring system. Ji Ekkubitto to pair the signal transmitted via each transmission path generated by the transmitting side sends the receiving side. And Ji Ekkubitto that has been fed from the feeding outlet side to the receiving side in the receiving side, by comparing the switch Ekkubitto generated in the receiving side detects an abnormal state of the transmission path, the abnormality detection signal by the detection of the abnormal state the back to the side out feed from receiving the inlet side.

[0003] The signal that make up each transmission line Te sending out side smell
Input signals of the signal sending circuits that are provided for each line and an output signal by comparing the <br/> detecting an abnormal condition of the transmission path.

[0004]

However, the above-described one has the following problems. To detect an abnormal condition of the transmission path in the receiving inlet side with respect to, feed
Transmission path and, requires at least two transmission lines of the transmission path to send back an abnormality detection signal by the detection of the abnormal state feed outlet side from the receiving inlet side to feed from the delivery side of the feed the outlet side of the switch Ekkubitto the receiving inlet side There is a problem that there is. Further, since it is necessary to provide an abnormality detection circuit for detecting an abnormal condition of the transmission path to receive entry side, in the case of the receiving device of a simple configuration has a problem that it is difficult to apply. Furthermore, since there are many number I found the following receiving inlet side than the feed delivery side in the normal, there is a problem that a considerable cost increase as a whole when the receiving side is provided an abnormality detection circuit, and the like.

[0005] since it is necessary to provide an abnormality detection circuit for detecting an abnormal state with respect to each signal line constituting the heat sending passage regard, there is a problem that the likewise significant cost increase.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and can reduce the cost and the number of transmission paths. It is intended to provide a monitoring method.

[0007]

SUMMARY OF THE INVENTION An abnormality monitoring method for a transmission line according to the present invention has a principle to achieve the above-mentioned object.
Thereof it includes, as shown in FIG. 1, a plurality of signal lines
From the sending side package to the receiving side package via the transmission path 1
In a signal transmission method for transmitting a signal to a cage , (a) the signal is transmitted to a transmission line while being provided on a transmission side.
That sender check bit generating means 2 for generating a switch Ekkubitto signal is provided in an (b) accepting, via the transmission path transfer
3 and the receiving-side check bit generating means for generating a switch Ekkubitto of feed signals, (c) together is provided on the delivery side, check bits and received that is generated by the sender check bit generator
But is characterized in that it comprises an abnormality detecting means 4 for detecting an abnormality of the transmission path by comparing the Ruchi Ekkubitto transmitted from the entry side, specifically, constitutes a large transmission path
Connected to the series for convenient abnormality monitoring
A new anomaly detection for each of the incoming
Output function. That is, the features of the present invention
Will send multiple receive packages to the send package.
Used for signal transmission lines configured to be connected to Leeds
Receiving the signal from the transmission package,
In the receiving package provided with a signal retransmission section,
The receiving package further checks the received signal.
Means for generating a check bit and the check bit generated
Sending end for sending back to the sending package; and
Series generated by other connected packages
Return path for the check bit to the above transmission package
Check bit reception / transmission circuit
Check bits generated in the package
Check bit against transmitted signal generated in page
To monitor the transmission line for abnormalities
You.

[0008]

A plurality of receiving sides are transmitted from the transmitting side via each transmission line 1.
In a signal transmission path that is configured to be connected to a series
Te, when a signal is transmitted, in the transmitting side check bit generating means 2 provided on the delivery side, to generate a Ruchi Ekkubitto that against the signal sent <br/> out to the transmission path. Moreover, against the signal transmitted through the transfer sending passage 1 in the receiving side check bit generating means 3 provided in each receiving side
It generates the Ruchi Ekkubitto, Ji Ekkubitto this is sent back to the sender is transmitted. Thus, the delivery side, and Ji Ekkubitto from sender check bit generator 2 by the abnormality detection means 4 provided on the delivery side, it sent back accepting check bit generator 3
And Ji Ekkubitto abnormality of the transmission line 1 is compared is <br/> detected from.

[0009]

Next, a specific embodiment of the transmission line abnormality monitoring system according to the present invention will be described with reference to the drawings. FIG.
In the transmission apparatus or transmission package 12 in <br/> outlet side feed to the transmission line comprising a plurality of signal lines 11, also receiving apparatus or receiving the package 13 is provided on the receiving inlet side. The transmission package 12 is composed of a large-scale integrated circuit LSI 14, and an LSI signal transmission circuit 15 as an output driver of the LSI 14 is provided for each signal line 11 inside the LSI 14.

In the LSI 14, an LSI signal transmitting circuit which is a signal transmitting side to the LSI signal transmitting circuit 15 is provided.
On the input side of the first fifteen, a first redundant parity bit for generating a parity check for a signal transmitted from the transmitting side to the receiving side via the transmission line including the plurality of signal lines 11 is generated. A parity generation circuit 16 is provided. The combined redundant bits generated in the first parity generation circuit 16 are:
Similarly, it is given to a comparison circuit 17 provided inside the LSI 14.

By the way, L in the transmission package 12
Transmission package corresponding to each signal line 11 outside SI14
A package signal sending circuit 18 as 12 output drivers is provided. Outside the LSI 14 and on the input side of the package signal transmission circuit 18, in other words, on the output side of the LSI signal transmission circuit 15, which is the signal reception side for the LSI signal transmission circuit 15, a plurality of signal lines 11 are connected.
A second parity generation circuit 19 is provided for generating a composite redundant bit for parity check with respect to a signal transmitted from a transmission side via a transmission line . This second
The composite redundant bit generated in the parity generation circuit 19 is supplied to the comparison circuit 17 described above.

[0012] Thus, in the comparison circuit 17 is composed of a plurality of signal lines 11 including LSI signal transmission circuit 15 when they do not match by comparing the redundant bits from the first and second parity generating circuit 16, 19 An alarm signal is output on the assumption that an abnormality is detected in the transmission path. Reference numeral 20 denotes a package signal receiving circuit provided corresponding to each signal line 11 in the receiving package 13.

[0013] For abnormality of the transmission line consisting of a plurality of signal lines 11 is detected by Invite feed exit side accordance with the present embodiment, a plurality of signals in a transmission package 12 by replacing the conventional ones in this embodiment Abnormality of the transmission line composed of the line 11 can be monitored. In order that detects an abnormality by comparing the synthetic redundant bits, abnormal small comparison circuit 17 than the number of signal lines 11 is not necessary to provide a comparator circuit 17 for each signal line 11
Detection it is, fewer number of input pins for uptake of synthesis redundant bits from the second parity generating circuit 19 to the inside LSI 14, the abnormality of the signal line 11 to the inside LSI 14
It is easy to provide a processing circuit including a comparison circuit 17 for the detection of.

Next, modified examples of the present embodiment will be described sequentially with reference to the drawings. The same reference numerals in the present embodiment denote the same contents, and a duplicate description will be omitted. i) First modified example (see FIG. 3) The output side of a package signal receiving circuit 20 in which a second parity generating circuit 19 is provided corresponding to a transmission line including a plurality of signal lines 11 in a receiving device or a receiving package 13 '. It is a case where it is provided in. In this case the receiving package 13 '
In the transmission package 12, the redundant redundancy signal from the second parity generation circuit 19 is transmitted through the signal line 23 provided with the redundancy bit signal reception circuit 22 in the transmission package 12. The comparison circuit 17 is provided. In addition, receiving package
After 13 ', a reception package similar to the reception package 13 of the present embodiment may follow.

Ii) Second Modification (See FIG. 4) Another transmission device or reception package is provided between the transmission package 12 and the reception package 13 'in the first modification with respect to the transmission line composed of a plurality of signal lines 11. 13 "is provided, and the other is the same as the first modification. In addition, reference numeral 20 'denotes a package signal receiving circuit, reference numeral 21' denotes a redundant bit signal transmitting circuit, and reference numeral 22 'denotes a redundant bit signal receiving circuit. Circuit.

Iii) Third Modified Example (See FIG. 5) A plurality of receiving devices are connected to a transmission line composed of a plurality of signal lines 11.
Or receiving package 13 ', 13 "' is connected to the series
Signal is transmitted on a signal transmission path
Therefore, the second parity generation circuits 19, 19 '
Or the receiving package 13 ', 13 "'
Synthetic redundancy generated by the receiving device or receiving package 13 '
Redundant bit signal transmission circuit 21 'serving as a long bit return path
And a redundant bit signal receiving circuit 22 '.
In each receiving device or receiving package 13 ', 13 "',
Generated by the second parity generation circuits 19 and 19 ', respectively.
The combined redundant bits are transmitted through the respective signal lines 23.
Given to the comparison circuit 17 in the LSI 14 in the package 12
You. In this case, the receiving device or receiving package
13 '''generated by the receiving device or receiving package 13 "'
A return path is provided for the redundant bits, and the
Redundant bit in the comparison circuit 17 of the transmission device or the transmission package 12
Will be returned. The comparison circuit 17 includes a receiving device or a receiving package.
Prepared corresponding to cages 13 ', 13 "' and send package 12
The configuration redundancy generated by the first parity generation circuit 16 in
Which receiver or receiver
An error occurred in the transmission path between the communication package 13 'and 13 "'
Can be detected.

Iv) Fourth Modified Example (see FIGS. 6A, 6B, and 6C) In the case where there are many signal lines 11 to be monitored, the first and second parity generation circuits 16, 16 'are used. , 19,19 'and even OR
Circuits 24, 24 ', 24 " etc. are combined.

According to the above modification, the receiving package 13 ',
Abnormality of the transmission line composed of the plurality of signal lines 11 including 13 ", 13"'can be detected, and in the case of the second and third modified examples, the receiving package 13 ", 13"' has a missing package. Abnormality can be detected.

In this modification, the second parity generating circuit 19 is provided on the output side of the package signal receiving circuit 20 in the receiving packages 13 'and 13 "', but it goes without saying that it may be provided on the input side. .

The transmission line 1 according to the present invention is connected to the signal line 11 including the LSI signal transmitting circuit 15 and the like in the present embodiment and the modification .
Rinari, sender check bit generating means 2 in the present invention corresponds to the first parity generating circuit 16, 16 'in the present embodiment and the modified example, the receiving-side check bit generating means 3 in the present invention in this embodiment and Corresponding to the second parity generation circuits 19 and 19 'in the modified example, the abnormality detecting means 4 in the present invention is a comparison circuit 17 in the present embodiment and the modified example.
And so on.

[0021]

As described above, according to the present invention, the transmission side transmits a plurality of signal lines through a transmission line including a plurality of signal lines.
Signal transmission in the form of a number of receivers connected to a series
In sending passage, when the signal is transmitted, via the signal transmission path and Ruchi Ekkubitto that against the signal sent to the transmission path and the return passage provided in the receiving side in the transmitting side of the heat transfer
Abnormality of the transmission path is compared with the check bits against the transmission signal is is detected. Therefore, it is not necessary to provide an abnormality detection unit in the receiving side, also with attained cost reduction because there is no need to provide an abnormality detection means for each transmission path, via the hand Den sending passage upon abnormality detection transmission
By Ruchi Ekkubitto that against the signal attained a reduction in the transmission path from the good if there is only transmission paths back to the sender from the receiving side.

Further, since the abnormality detecting means is provided on the sending side and does not need to be provided on the receiving side, it can be applied to a receiving device having a simple structure. Further, if the sending side is L
In the case where the LSI is used, it is possible to incorporate the transmission-side check bit generation means and the abnormality detection means inside this LSI, and by incorporating such, it is possible to reduce the number of input / output pins of the LSI. it can.

[Brief description of the drawings]

FIG. 1 is a principle block diagram for explaining a principle configuration of a transmission line abnormality monitoring method according to the present invention.

FIG. 2 is a block circuit diagram of a specific embodiment of a transmission line abnormality monitoring method according to the present invention.

FIG. 3 is a block circuit diagram of a first modified example.

FIG. 4 is a block circuit diagram of a second modified example.

FIG. 5 is a block circuit diagram of a third modified example.

FIG. 6 is a block circuit diagram of a fourth modified example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Transmission path 2 Transmission side check bit generation means 3 Acceptance side check bit generation means 4 Abnormality detection means 11,23 Signal line 12 Transmission package 13,13 ', 13 ", 13"' Receiving package 14 LSI 15 LSI signal transmission circuit 16 , 16 'First parity generation circuit 17 Comparison circuit 18 Package signal transmission circuit 19,19' Second parity generation circuit 20,20 ', 20 "Package signal reception circuit 21,21', 21" Redundancy bit signal transmission circuit 22,22 ', 22 "redundant bit signal receiving circuit 24,24', 24" OR circuit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsuyoshi Tsuhara 1-4-4 Hakata Ekimae, Hakata-ku, Fukuoka, Fukuoka Prefecture Inside Fujitsu Kyushu Communication System Co., Ltd. (56) References JP-A-3-74946 (JP, A)

Claims (1)

(57) [Claims] A plurality of receiving packages are provided for a transmitting package.
Signal transmission line configured by connecting cages in series
For receiving a signal from the transmission package
And the receiving package provided with a re-transmission unit for the signal.
In addition, the receiving package further controls the received signal.
Means for generating a check bit for
Sending end for sending the check bit back to the sending package
And other receiving packages connected in series.
Return the generated check bit to the above sending package
A check bit reception / transmission circuit serving as a path
Check bit generated in each receiving package
Check the transmission signal generated by the transmission package
Abnormality of the above transmission line can be monitored by comparing with bits
An abnormal line monitoring method for transmission lines.