Logical Topology Design for Eliminating Cycle Attacks in Optical Code Path Networks
- Title :
Logical Topology Design for Eliminating Cycle Attacks in Optical Code Path Networks
- Author :
Y. Katsukawa, S. Huang, and K. Kitayama
- Journal :
to appear in IEE/OSA Journal of Optical Communications and Networking.
- Abstract :
In optical code path networks a cycle attack phenomenon has been reported. Cycle attack is caused by the multi-access interference (MAI) among different OC paths carried by the same wavelength. Previous study proposed a heuristic wavelength assignment scheme to avoid this unintended cycle attack problem. However, the wavelength assignment retry in the previous proposal may impose an overhead on OC path establishment latency and furthermore it was not a complete solution to eliminate cycle attacks. In this paper, we propose a cycle attack free logical topology design to eliminate the unintended cycle attack problem in network planning phase instead of the wavelength assignment. The basic idea is to convert the physical network topology into some tree-based logical topologies in which OC paths are routed. Simulation results show that, a) using the tree-based topologies with smaller average hop count helps to obtain better blocking performance; b) in distributed optical path establishment our proposed approach performs better in terms of blocking and delay performance under relative dynamic traffic condition.
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