An Aggregated Multicast Fault-Tolerant Approach Based on Sibling Node Backup in MPLS

In order to provide the fault-tolerant capability of multicast communications, several multicast recovery schemes have been proposed at present. These schemes can be divided into two classes: reactive and pro-active. Reactive scheme can take longer recovery time. In result, it does not fit some real applications. In this paper, we focus on pro-active multicast recovery scheme, for example, the "dual-tree" fault-tolerant scheme; it cannot deal with the node failure. In this paper, we propose SBAMM (sibling-based backup aggregated multicast in MPLS) fault-tolerant approach, on the one hand, it can deal with single link and node failure in a quick and nice way, and on the other hand, it can enlarge the protecting area. Finally, it can optimize the cost of maintaining backup tree. In addition, the SBAMM scheme has the excellence of MPLS. By analysis, the SBAMM scheme has better protecting rate, reducing cost of the multicast deliver tree, and so on.