Network Virtualization Over Wdm Networks

Network virtualization can eradicate the ossification of the Internet and stimulate innovation of new architectures and applications. Optical networks are ideal substrates for provisioning high-bandwidth virtual-network services. We investigate the problem of network virtualization over WDM networks by formulating a mixed integer linear program (MILP). Two heuristics, MaxMapping and MinMapping, are developed to solve the problem quickly but suboptimally. Numerical examples show that MinMapping consumes fewer wavelengths than MaxMapping and performs close to the optimal results of the MILP, by exploring the opportunities of traffic grooming.