New self-healing scheme that realizes differentiated bandwidth requirementon ATM networks

This paper proposes a new self-healing scheme that differentiates the bandw idth requirement for each network service on ATM networks. First, we show t he necessity of our proposed scheme. In the future network, we must satisfy two demands, rapid restoration from failure and differentiated bandwidth r equirements. The conventional restoration scheme, called the self-healing s cheme, realizes rapid restoration, but does not support bandwidth different iation; the new self-healing scheme proposed herein does. We also show that the proposed scheme reduces the spare resources required for backup. The s cheme can be realized as a simple extension of the conventional self-healin g scheme. Finally, simulations show that the proposed scheme requires fewer spare resources while offerings comparable restoration time to the convent ional approach against any demand pattern.