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Traffic engineering for virtual private networks and random traffic demands in WDM optical core networks

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4 Author(s)
Doumith, E.A. ; Comput. Sci. & Networks, GET/ENST, Paris, France ; Gagnaire, M. ; Audouin, O. ; Puech, N.

Two main classes of traffic demands may be considered in data networks: virtual private networks (VPN) and random traffic requests. In this paper, we investigate traffic engineering for such traffic classes in the context of hybrid WDM optical networks. A hybrid optical network is made of a set of multi-granularity switches, each electrical cross-connect (EXC) of the network being coupled to an optical cross-connect (OXC). Our approach differs from existing approaches by combining global optimization tools with iterative optimization tools to solve the routing and wavelength assignment (RWA) problem. For this reason, a simulated annealing meta-heuristic has been developed to route lightpath demands associated to VPN traffic. On the other hand, random demands are routed sequentially by means of a Dijkstra algorithm. Hence, space-time correlation between demands as well as sub-wavelength traffic grooming have been considered in our RWA strategy.

Published in:

Computer Communications and Networks, 2005. ICCCN 2005. Proceedings. 14th International Conference on

Date of Conference:

17-19 Oct. 2005