A novel high performance multicast scheme on virtual ring-based 2D Torus Topology in DWDM networks

Wavelength Division Multiplexing (WDM) not only can increase the bandwidth of backbone transmission network significantly, but can also decrease the network cost and make the controlling and maintaining of transmission easy. The applications of multipoint-to-multipoint multicast communication, such as Video on demand and video conference, are important on Internet. The characteristics of multipoint-to-multipoint multicast communication are massive data, the transmission from different sources in the same multicast session and real-time. A novel high performance algorithm, virtual 2D Torus Topology Conversion-Two-hop virtual rings routing-EAC wavelength assignment algorithm (TTCA-TVRR-EAC) for multicast, is proposed in this paper. The TTCATVRR-EAC includes (1) the TTCA algorithm is employed to convert the real networks into torus networks; (2) the TVRR algorithm is utilized for routing; and (3) EAC algorithm is used for wavelength assignment. The simulation results show that the proposed algorithm outperforms RTRWA and SMT algorithm in terms of call blocking probability, different user capacity and channel utilization.