A SDN-Assisted Energy Saving Scheme for Cooperative Edge Computing Networks
Ali Abdulnaser Alnoman, Alagan Anpalagan · 2019
In this paper, an edge device sleeping mechanism is proposed to save energy in cooperative edge computing networks. Energy saving in the proposed scheme is obtained by implementing a software- defined networking (SDN)-assisted interactive On/Off operation on edge devices taking into account the quality of service (QoS) experienced by end-users. First, an optimization problem is formulated to reduce the number of active edge devices under the queueing probability constraint. Herein, edge devices are modeled as M/M/k queueing systems, whereas the square-root staffing rule is used to maintain the queueing probability below desired levels. Then, a load balancing mechanism is carried out to reduce the variations in resource utilization among edge devices. To this end, a discrete-time Markov chain (DTMC)-based algorithm is implemented to achieve the intended load balancing. Results show the effectiveness of the proposed scheme in achieving energy saving and maintaining the queueing delay at controlled levels.