Energy-Efficient Sleep Mode Adjustment Considering GoP Structure

In order to reduce power consumption of GO in Wi-Fi direct which act as traditional Wi-Fi AP, the Wi-Fi alliance proposed two power saving method called Opportunistic power save and NOA power save method. However, both scheme result in different energy efficiency performance according to traffic pattern, also the specification does not define how GO adjust the parameters(CTWindow, ratio of absent/present interval). In this paper, we proposed a new power saving method based on NOA power save mode to improve energy efficiency. We obtain energy gain by dynamically adjusting the GO awake interval depending on the estimated size of video frame which arrive the next beacon period. Additionally, based on frame inter-dependency define frame importance order, then using that processing frame transmission which high priority frame take high transmission probability.