Line Monitoring for SDH signals

Details Line Monitoring for SDH signals Line Monitoring for SDH signals

1994-02-03

1995-07-11

Canney, Vincent P.

Excavating

371 204, 371 51, G06F 1100

Patent

active

054327962

ABSTRACT:
Regenerator sections in known regenerators, which comply with CCITT-Recommendation G.958, are supervised by monitoring the transmission error probability of SDH (synchronous digital hierarchy) signals, through determination of the parity. This requires the breakdown and restoration of the SDH signal. This requires special signal processing installations, not required for regenerating transmission signals, such as multiplexer and demultiplexer, which cause considerable loss of output. The regenerator (RE) according to the invention determines the transmission error probability by comparing a known word in the head part of an STM-N signal with a reference word. The transmission error probability is derived from the result of the comparison, and transmitted to a central unit via an error line (FL). For example, to transmit the transmission error probability in an STM-N signal, the service channel of a regenerator that complies with CCITT-Recommendation G.958 may be used.

REFERENCES:
patent: 5095482 (1992-03-01), Grallert
patent: 5151902 (1992-09-01), Grallert
patent: 5177742 (1993-01-01), Herzberger
Evolution of ISDN Towards Broadband ISDN by Rainer Handel, IEEE Network, Jan. 1989, pp. 7-13.
Commutation Et Transmission Bd. 11, Nr. 2, Feb. 1989, Paris Fr Seiten 85-96. J. M. Beaufils et al. "Nouvelle Generation de Multiplexeurs Numeriques de 2 A 140 Mbits/s".
Patent Abstracts Of Japan, vol. 0]], No. 073 (E-486) 5. Mar. 1987 & JP-A-61 230 451 (NEC Corp.) *Zusammenfassug*.
IEEE/IECE Global Telecommunications conference 1987; 15.-18. Nov. 1987; Tokyo, JP; Band 2; Seiten 895-902; A. Miles "Digital Performance Monitoring System".
Telecom Report. Bd. 12, Nr. 6, Nov. 1989, Munchen de Seiten 200-203-D. Seidel "Hohere Ubertaragungsqualitat durch leistungsfahige Uberwachung".

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