Dynamic Multicast Protection Algorithms for Reducing Residual Links in WDM Mesh Networks

In this work, we investigate the problem of protecting dynamic multicast sessions in mesh WDM networks against single link failures. We propose two efficient multicast session protecting algorithms, called optimal path pair based removing residual links (OPPRRL) and source leaf path based avoiding residual links (SLPARL), which try to reduce the usage of network resource by removing or avoiding residual links in the topology consists of "light-tree " and its backup paths. We compare the proposed algorithms with existing algorithms through simulation. Simulation results indicate that the two proposed algorithms have better performance than other existing algorithms in terms of wavelength links required and network blocking probability.