Fractional Lambda/Time Driven Switching

Abstract

This paper introduces the principle of fractional lambda switching and evaluates its potential in the future internet. And, find out the tradeoff between link utilization and time-frame mismatch delays and probability of call blocking. In a fractional lambda switching network (F λ N), pipeline forwarding is implemented to control the forwarding of packets which makes use of Common Time Reference (CTR ) which provides phase synchronization. There are some advantages when fractional lambda switching is deployed. Wavelength division multiplying (WDM) with high capacity switches (λ switches) can address the need of the growing amounts of internet activity. However, switching of whole lambdas is very inefficient and costly for some reasons. [2] For example, the problems of grooming and degrooming of data units, bandwidth mismatch and N2 problem. With help of fractional lambda switching, the issues caused by WDM with whole lambda switching can be solved by switching fractional of lambda. [2]