Energy aware survivable routing approaches for Next Generation Networks

With the significant growing of multi-service traffic demands in Next Generation Networks (NGNs), there is a need for reducing the overall energy consumption due to the environmental impact and potential economic benefits. While most existing green networking approaches take no or less consideration on the service resilience aspect. There is an inherent contradiction involved in accommodating both service resilience by overprovision of backup network resources such as nodes and links, as well as minimizing the energy consumption by switching off the unnecessary network elements simultaneously. In this paper, we propose three energy aware survivable routing approaches to enforce the routing algorithm to work out a trade-off solution between fault tolerance and energy efficiency requirements. Simulation results have confirmed that Energy Aware Shared Backup Protection (EASBP) could be a promising approach to resolve the above trade-off problem. It consumes much less capacity by sacrificing a small increase in energy expenditure compared with two other proposed approaches. It is especially effective for the large volume of traffic demands under NGNs environment.