Heuristic Approaches for Optimized Regenerator Placement with Hybrid Fiber Amplification (HFA) in Optical Networks

Abstract

Exponential increase in the requirements of resources from internet users causes proliferation in the internet tra c. In this regard, the optical network o ers data transmission between sender and receiver through optical bers which is faster and reliable than any other network i.e. wireless network and copper wired network. Due to such e ciency optical network is known as backbone of the internet. Although, optical networks are very optimistic solution to ful ll demands of internet tra c but there are some optical layer constraints and physical impairments which should be taken under consideration to cope with increasing demands. Some of these impairments are signal degradation, inappropriate modulation scheme and ine cient algorithm scheme etc. When signal propagates over a link from sender to receiver, this signal degrades with the time and distance covered. erefore, to reach on its nal destination that signal must be regenerated. Optical signal can be regenerated by placing optical regenerator on the optical link where the signal starts to degrade. However, adding these regenerators in the network is not a very e cient approach. So it is required to upgrade the network. In this thesis, the optical network is enhanced by selectively upgrading the optical line amplifiers. e outcome shows that this approach can provide a great reduction in number of regenerators which are placed in the network topologies and makes network more transparent and efficient.