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Traffic grooming schemes have attracted a lot of research attention for addressing the bandwidth mismatch between low data-rate user connection requests and a high capacity lightpath. Survivability of individual user connections is also highly important. The problem of survivable traffic grooming is known to be NP-Complete. In this paper we suggest heuristics to solve the problem in WDM mesh networks...
This paper presents a comparative study between the dynamic survivability approaches in WDM mesh networks. The paper focuses on the diverse routing and the p-cycle approaches to protect mesh networks against single span failure under dynamic traffic. The computational complexity and the blocking performances of both approaches are analyzed and compared. Simulation results suggest that the p-cycle...
Dynamic grooming deals with requests for wavelength allocation based on a dynamic pattern of arrivals in contrast to the situation of static grooming in which the pattern of arrivals must be previously known. Solutions for dynamic grooming typically involve the construction of an auxiliary graph for deciding on the routing and wavelength assignment. An auxiliary graph can represent the network partially...
The amount of spare capacity for restoration is usually calculated using network design tools. This task depends on the detailed information about the network topology and traffic model. In order to allow a preliminary evaluation of the networks, we propose an approximation to estimate the spare capacity required to a mesh network recover from any single link failure. The expression is based on statistical...
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