Traffic Grooming in Wdm Networks

Fiber optic communication technology has brought a revolution since 1970s. This technology has rapidly replaced the copper wires, starting from the core backbone networks then gradually to the metro and now finally towards the access networks. WDM networks present concurrency by multiplexing more than one wavelength and transmit them simultaneously within the same fiber. A lightpath is an optical association, from a source to a destination over a wavelength on each intermediate link. These end to end all-optical circuits tender bandwidths equivalent to the bandwidth provided by single wavelength. Such optical networks are referred to as the wavelength division multiplexing networks We have chosen HEGONS (Heterogeneous Grooming Optical Network Simulator) as the tool for network simulations A Heterogeneous Grooming Optical Network Simulator (HEGON Supporting mixed routing & wavelength assignment algorithms and optional wavelength conversions capability on each node. Disparate many other simulators, the goal in developing. Hegons is NOT to simulate the OSI model layers as they are. These simulators mimic the behavior of say TCP/IP or GMPLS in order to provide a virtual platform for learners, developers and testers. Hegons on the other hand, targets at one thing and only one thing: The evaluation of different dynamic (RWA)Routing and Wavelength Assignment algorithms in WDM optical networks in terms of several measures such as: call jamming probability, Fairness (Variance in blocking probability), call setup time, etc.