A Traffic-Aware Adaptive Sleep Mode Operation for IEEE 802.16e Based WiMAX

To enhance the energy efficiency of broadband wireless access devices based on battery power, a traffic-aware based adaptive sleep mode operation was proposed for IEEE 802.16e power saving mechanism. By analyzing the behaviors of a mobile station working in the sleep mode operation with a Markov chain model, we explore the relationship among traffic, energy consumption and delay. Based on the analytical results, we propose a heuristic algorithm to adapt the parameters of sleep mechanism to the subscriber station traffic and the delay requirement. Extensive simulation results show that the proposed algorithm outperforms the traditional power saving mechanisms in both the power consumption and the mean delay.