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2010
IEEE

Routing and Spectrum Allocation in OFDM-Based Optical Networks with Elastic Bandwidth Allocation

8 years 9 months ago
Routing and Spectrum Allocation in OFDM-Based Optical Networks with Elastic Bandwidth Allocation
Orthogonal Frequency Division Multiplexing (OFDM) has been recently proposed as a modulation technique for optical networks, due to its good spectral efficiency and impairment tolerance. Optical OFDM is much more flexible compared to traditional WDM systems, enabling elastic bandwidth transmissions. We consider the planning problem of an OFDMbased optical network where we are given a traffic matrix that includes the requested transmission rates of the connections to be served. Connections are provisioned for their requested rate by elastically allocating spectrum using a variable number of OFDM subcarriers. We introduce the Routing and Spectrum Allocation (RSA) problem, as opposed to the typical Routing and Wavelength Assignment (RWA) problem of traditional WDM networks, and present various algorithms to solve the RSA. We start by presenting an optimal ILP RSA algorithm that minimizes the spectrum used to serve the traffic matrix, and also present a decomposition method that breaks RSA...
Kostas Christodoulopoulos, Ioannis Tomkos, Emmanou
Added 11 Feb 2011
Updated 11 Feb 2011
Type Journal
Year 2010
Where GLOBECOM
Authors Kostas Christodoulopoulos, Ioannis Tomkos, Emmanouel A. Varvarigos
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