Distributed global clock system

Details Distributed global clock system Distributed global clock system

1995-05-05

1998-10-13

Bocure, Tesfaldet

Pulse or digital communications

Repeaters

Testing

375371, 375386, H04L 702

Patent

active

058223819

ABSTRACT:
A clock system for a distributed multiprocessor system includes a plurality of local clock circuits and a distribution network. The distribution network includes a plurality of interconnected routers. Each local clock circuit is associated with a processing node of the multiprocessor system. Each local clock circuit generates a global clock source signal, provides the global clock source signal to the distribution network, receives a global clock signal back from the distribution network, and generates a global time value based on a local clock signal and the global clock signal. The router is part of the distribution network of the multiprocessor system. The router receives the global clock source signals from each of the local clock circuits, selects one of the global clock source signals as the global clock signal and provides the global clock signal to the distribution network for distribution to each of the local clock circuits.

REFERENCES:
patent: 5361277 (1994-11-01), Grover
patent: 5361398 (1994-11-01), Christian et al.
patent: 5406559 (1995-04-01), Edem et al.
patent: 5416808 (1995-05-01), Witsaman et al.
patent: 5432823 (1995-07-01), Gasbarro et al.
Ofek, Yoram, "Generating a Fault Tolerant Global Clock in a High Speed Distributed System", Distributed Computing Systems, 1989 International Conference.

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