Expandable universal network

Details Expandable universal network Expandable universal network

2002-12-11

2008-11-11

Li, Shi K (Department: 2613)

Optical communications

Multiplex

Optical switching

C398S050000, C398S075000, C370S351000

Reexamination Certificate

active

07450845

ABSTRACT:
A wide-coverage high-capacity network that scales to multiples of petabits per second is disclosed. The network comprises numerous universal edge nodes interconnected by numerous disjoint optical core connectors of moderate sizes so that a route set for any edge-node-pair includes routes each of which has a bounded number of hops. A core connector can be a passive connector, such as an AWG (arrayed wave-guide grating) device, or an active connector such as an optical channel switch or an optical time-shared channel switch. The core capacity is shared. Thus, failure of a proportion of core connectors reduces network connectivity but does not result in a major service discontinuity. The network uses a source routing scheme where a set of candidate routes for each node pair is determined from the network topology and the candidate routes for a node pair are sorted according to their differential propagation delays. A method of measuring the differential propagation delay is also disclosed.

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patent: 2002/0024690 (2002-02-01), Iwaki et al.
patent: 2003/0185205 (2003-10-01), Beshai
patent: 2007/0171900 (2007-07-01), Beshai et al.

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