High demands in data delivery latency and communication reliability encourage the use of fault-tolerance-enhanced all-optical WDM networks. Low latency is satisfied by setting up a direct lightpath between any communication pair to enable one-shot transmission. High reliability is met by establishing multiple disjoint lightpaths from the source to the destination. In this paper, we explore the fault-tolerance potential in circulant graphs, which offer good flexibility in the number of supported nodes and network connectivity. We propose a circulant-graph-based all-optical network architecture together with a fault-tolerant routing algorithm. Network resource utilization is analytically calculated and results show that increasing network connectivity helps reduce the required number of wavelengths for simultaneous all-node communications. A connection reliability model is developed combining both node and link failure effects. The reliability benefit obtained from the proposed algorithm grows almost linearly with network connectivity increase in a logarithmic scale.
[1]
Janise McNair,et al.
A Fault-Tolerant Backbone Network Architecture Targeting Time-Critical Communication for Avionic WDM LANs
,
2009,
2009 IEEE International Conference on Communications.
[2]
Yonggang Wen,et al.
Ultra-reliable communication over unreliable optical networks via lightpath diversity: system characterization and optimization
,
2003,
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).
[3]
A. A. Farrag.
Algorithm for constructing fault-tolerant solutions of the circulant graph configuration
,
1995,
Proceedings Frontiers '95. The Fifth Symposium on the Frontiers of Massively Parallel Computation.
[4]
Muriel Médard,et al.
High-reliability topological architectures for networks under stress
,
2004,
IEEE Journal on Selected Areas in Communications.
[5]
D. Frank Hsu,et al.
Fault-tolerant routing in circulant networks and cycle prefix networks
,
1998
.