Traffic Grooming based on Light-trail in Wavelength Routed Optical Network

Abstract

Abstract-In wavelength routed optical networks, the number of wavelength channels is limited due to technological limitation and each wavelength channel as well as each lightpath support traffic in the Gbps range. In reality, we observe that the majority of individual connection request require a bandwidth in the Mbps range. Therefore, to utilize the network resources like bandwidth, transceivers effectively, we need to be efficiently groomed or multiplexed several low speed traffic requests into a high speed/capacity lightpath. The entire wavelength channel of this lightpath is used exclusively by the source-destination node pair. Data cannot be transmitted or received by the intermediate nodes along the lightpath. Therefore, the wavelength capacity again may be underutilized. To overcome this drawback a novel technique known as light-trail came into existence. The light-trail is a generalized version of the lightpath to avoid the inability of intermediate nodes to use a wavelength connection. In this work, we have investigated the static traffic grooming problem for wavelength routed optical networks. The work proposed a traffic grooming algorithm to maximize the network throughput for wavelength routed mesh optical networks using static light-trail. The effectiveness of the proposed approach has been established through extensive extensive simulation on different sets of traffic demands with different bandwidth granularities for different network topologies and compared the approach with existing algorithms.