Abstract:

In optical network, heterogeneous destination nodes make throughput of multicast traffic decrease and resource utilization decline. A method for determining optimal layered multicast rate is proposed to maximize the network throughput. Based on the heuristic algorithm, the optimal layer multicast rate is optimized to maximize the network total throughput. Meanwhile, the link share degree is calculated for the multicast tree link. In order to minimize the wavelength bandwidth consumption, the network coding technology is put forward to transmit the packet for the high share degree link. The layered multicast rate and wavelength bandwidth allocation are jointly optimized to resolve the throughput maximal problem for heterogeneous multi-rate network. Furthermore, the proposed method can improve the wavelength bandwidth utilization

Key words: optical network, layered multicast, network coding, throughput, wavelength utilization