Abstract
In an optical burst switching (OBS) network, some contention resolution
schemes at a core router have been proposed. However, in terms of the optical device
technology, it is difficult to implement the contention resolution schemes such as
optical buffers at a core router. In this paper, we propose the scheme that reduces
the probability of burst contention by controlling the route at an edge router
without resolving burst contention at a core router. Each edge router learns a
suitable route to the destination edge router autonomously by using newly employed
feedback packets and search packets. Due to the self-learning at each edge router,
the traffic load is distributed in an OBS network. Therefore, our proposed scheme
can reduce the probability of burst contention. According to computer simulations,
under nonuniform traffic, our proposed scheme can reduce approximately one decade
smaller burst loss probability compared with the conventional shortest path routing
method.
© 2005 Optical Society of America
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