Partial Multicast Protection in WDM Networks

In this paper, the concept of partial multicast protection is explored to decrease the blocking probability of establishing a multicast connection. The link(s) which carry traffic for multiple destination nodes will be the candidates for protection in a multicast tree. Only one destination node will not receive the data from the source node when the single failed link is not protected by the proposed partial multicast protection schemes. But the affected destination node can dynamically rejoin its multicast session. In this way, the blocking probability can be reduced due to the saving of backup resources. The survivability for multicast service in the WDM networks can also be guaranteed in a high degree. Extended simulation is performed to study the performance of the proposed partial multicast protection schemes.