A new preplanned self-healing scheme for multicast ATM network

We study several backup path building schemes for multicast tree in self-healing ATM networks. Point-to-point link and path protection schemes are extended and modified for point-to-multipoint connection in ATM networks. A new scheme that modified from link protection and taking the advantage of the special structure of multicast tree is proposed. To minimize the spare capacity usage, several integer linear programming formulations are formulated and solved. After evaluating several test cases, we conclude that the new proposed theme has a good efficiency in the spare capacity usage and a fast restoration time