SDH-based ATM network survivability escalation strategies and resource sharing pool (RSP)

This paper investigates the survivability escalation strategies in multi-layer transport networks such as ATM/SDH/WDM networks, and presents oriented-failures and oriented-traffic escalation mechanisms. Furthermore, a new survivability escalation strategy for SDH-based ATM transport networks, which addresses resources sharing pool (RSP) among different layers restoration mechanisms and can be easily extended for other types of multi-layer networks, such as WDM-based ATM networks or WDM-based SDH networks.