JPH06152571A - System for monitoring speech path system switching - Google Patents

Abstract

PURPOSE:To detect the system switching abnormalitly at a reception selector fault as soon as possible in the duplicated speech path device with system confounding. CONSTITUTION:At the side of 0-system reception, a system selection signal 20 is generated by an LSEL 305 by means of ACT/SBY signals 12 and 13. A SEL 301 selects one of the 0-system transmission data 10 and 1-system transmission data 11, taking it as 0-system reception internal data 25. CRCCHK 302 and 303 corresponding to the 0- and 1-system CRCGEN 100 and 200 perform CRC check for the internal data 25, and the result is transmitted to an ERRSEL 304 as 0- and 1-system speech path data fault signals 21 and 22. A system selection fault signal 23 is transmitted when a speech path data fault signal of the system shown by a system selection signal 20 is erroneous and a speech path fault signal of the system opposite to the system shown by the signal 20 is normal. A speech path fault signal 24 is transmitted when both speech path data fault signals 21 and 22 are erroneous.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication path switching monitoring system in a dual communication path device having a system confounding function.

[0002]

2. Description of the Related Art Conventionally, such system switching of a duplexed communication path is performed by ACT / SBY received from both systems on the transmitting side.
The system switching is performed by the system selection signal generated by the receiving side by the signal, and the normality of the system switching is guaranteed by monitoring the system switching signal.

[0003]

According to the above-mentioned conventional communication path system switching monitoring system, the normality of system switching is not guaranteed when there is an abnormality in the device that actually selects the received data by the system selection signal. There is a problem.

[0004]

According to the communication path switching monitoring system of the present invention, the transmission side in a communication path device having a communication path having a system confounding and a duplexed communication path has a bit number in both systems for transmission data. CRCs using the same and different generator polynomials are added, and the receiving side of the communication path device switches the system selection of the received data in synchronization with the system selection signal generated by the ACT / SBY signals received from both systems of the transmitting side. CRC check is performed for both systems on the selected received data, and the normality of system switching during system switching and the normality of received data during normal operation are monitored by the CRC check result and the system selection signal. It is characterized by

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a communication path switching monitoring system of the present invention.

0-system CRC generator (hereinafter CRCGE
N) 100 adds a 16-bit CRC, and sends the data to the 0-system receiving side receiver (hereinafter REC) 300 via the 0-system driver (hereinafter DRV) 101. 1-system CR
The CGEN 200 adds a 16-bit CRC using a generator polynomial different from that of the 0-system CRCGEN 100, and sends data to the 0-system REC 300 via the 1-system DRV 201.

On the receiving side of the 0 system, the 0 system ACT / SBY signal 1
A system selection signal generation circuit (hereinafter, LSEL) 305 generates a system selection signal 20 based on the 2 and 1 system ACT / SBY signals 13, and a selector (hereinafter, SEL) is generated by this system selection signal 20.
At 301, one of the 0-system transmission data 10 and the 1-system transmission data 11 is selected as the 0-system reception side internal data 25. CRC checker (hereinafter CRCCHK) 30 corresponding to 0-system CRCGEN100 for 0-system receiving side internal data 25
CRCCHK3 corresponding to 2,1 CRCGEN200
A CRC check is performed at 03, and the results are used as a 0-system speech path data failure signal 21 and a 1-series speech path data failure signal 22 and an error factor identification circuit (hereinafter referred to as ERSEL) 3
Send to 04. ERRSEL 304 is a system selection signal 20
When the call path data failure signal of the system indicated by is an error and the call path failure signal of the system opposite to the system indicated by the system selection signal 20 is normal, the system selection failure signal 23 is transmitted, and the call path data failure signals 21, 22 When both are in error, a speech path obstacle signal 24 is sent out.

In this embodiment, by monitoring the system selection signal 23 and the communication path failure signal 24, it is possible to confirm the normality of the system switching at the time of system switching and the normality of the speech path data at the time of normal operation. .

[0009]

As described above, the communication path system switching monitoring system of the present invention has the effect that the reliability of the entire system can be improved by improving the fault detection capability by system switching.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a communication path switching monitoring system of the present invention.

[Explanation of symbols]

10 0 system call path data 11 1 system call path data 12 0 system ACT / SBY signal 13 1 system ACT / SBY signal 20 system selection signal 21 0 system call path data failure signal 22 1 system call path data failure signal 23 system selection failure Signal 24 Call path obstacle signal 25 0 system receiving side selection data 100, 200 0 system, 1 system CRC generator (C
RCGEN) 101, 201 0 system, 1 system driver (DRV) 300 0 system receiver (RCV) 301 Selector (SEL) 302, 303 0 system, 1 system CRC generator for CRC generator (CRCCCHK) 304 Error factor identification Circuit (ERRSEL) 305 System selection signal generation circuit (LSEL)

Claims (1)

[Claims] 1. A CRC using a generator polynomial having the same number of bits in both systems for transmission data at a transmission side in a communication channel device having system confounding and having a duplexed communication channel.
(Cyclic Redundancy Check
Code) is added, and the receiving side of the communication path device switches the system selection of the reception data in synchronization with the system selection signal generated by the ACT / SBY signal received from both systems of the transmission side, and selects the received data. CRC for both systems
A system for monitoring switching of a communication path system, wherein each check is performed and the normality of system switching during system switching and the normality of received data during normal operation are monitored by the CRC check result and the system selection signal.