Hitless clock recovery in ATM networks

Details Hitless clock recovery in ATM networks Hitless clock recovery in ATM networks

1997-08-25

2000-11-07

Kizou, Hassan

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

370395, 375362, 375376, H04J 306, H04L 1256, H04L 704

Patent

active

061446742

ABSTRACT:
A method of generating timing signals for constant bit rate data received over an asynchronous data network carrying, comprises recovering clock signals from at least two separate sources, selecting one of the sources to drive a phase-locked loop generating a high speed output signal locked to the selected source, dividing the high speed output signal to provide the required timing signals for said constant bit rate data, and continually monitoring the selected source. In the event of failure of the selected source, the phase-locked loop is allowed to free run in a hold-over mode while it is switched over to the other source.

REFERENCES:
patent: 4972442 (1990-11-01), Steierman
patent: 5184350 (1993-02-01), Dara
patent: 5249206 (1993-09-01), Applelbaum et al.
patent: 5260978 (1993-11-01), Fleischer et al.
patent: 5260979 (1993-11-01), Parket et al.
patent: 5572167 (1996-11-01), Alder et al.
patent: 5596300 (1997-01-01), Dietrich
patent: 5694397 (1997-12-01), Burton
patent: 5822383 (1998-10-01), Muntz et al.
Lau R C et al: Synchronous Techniques for Timing Recovery in Bison IEEE Transactions On Communications, vol. 43, No. 2/04, Part 03, Feb. 1, 1995, pp. 1810-1818. XP000505653 p. 1810, Col. 2, Line 25, p. 1811, col. 1, line 11; p. 1811, col. 2, alinea IV; p. 1817, col. 2, line 28; p. 1818, col. 1, line 3.
Kazuo Yamaguchi et al: Asynchronous Transfer Mode (ATM) Transport Systems Based on High-Speed Optical Transmission Technologies Fujitsu-Scientific And Technical Journal, vol. 30, No. 2, Dec. 1, 1994, pp. 203-212, XP000504492; p. 204, col. 2, alinea 2.2; p. 205, col. 2.
JAPIO abstract of Japanese Patent specification JP 9064732 (Toshiba) Jul. 3, 1997 see abstract.
JAPIO abstract of Japanese Patent specification JP 5083238 (FUJITSU) Feb. 4, 1993 see Abstract.

Affiliated with

Also associated with

Rating

Hitless clock recovery in ATM networks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hitless clock recovery in ATM networks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hitless clock recovery in ATM networks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1648719