Abstract:
The rapid change in optical networking is the result of progressive growth
in IP tra c volume, its diversity and bandwidth hungry applications. In
this connection, Elastic Optical Network (EON) is emerging as a promising
solution, due to its adaptable characteristics and adjustable data rate
accommodation to support heterogeneity of tra c demands. Routing and
Spectrum Allocation (RSA) is a spectrum management problem in EON
and NP hard. Clearly the e cient utilization of network resources, mainly
bank on the applied ordering strategy. In this thesis, we propose a novel
heuristic algorithm Minimum Hops with Least Slot Spectrum (MHLS) to
accommodate maximum tra c requests with better spectrum utilization.
The objective of the proposed algorithm is to minimize the total number
of Blocked Requests (BR), Blocked Bit-rates (BB) in Gb/s and Slots Used
(SU) in the network. The performance is evaluated on random optical network
of 20 nodes along with two di erent real size optical networks such as
PAN EU and USA network. Network performances are evaluated in terms of
BR, BB and SU through simulation. Results depict that propose technique
is e ective in minimizing the number of rejected tra c demands, bit-rates
(Gb/s) and considerable spectrum savings can be achieved as compared to
other considered benchmark techniques.
