It Can Drain Out Your Energy An Energy Energy-Saving Saving Mechanism Against Packet Overhearing in High Traffic Wireless LANs
Abstract: Energy efficiency is a critical issue of wireless devices. As the packets are broadcast to the devices in the wireless transmission media, all active neighboring devices have to spend their energy receiving the packets though the packets are not addressed to them, which is called as the packet overhearing problem. The real-world world traffic trace analysis reveals that the energy cost on the packet overhearing accounts for the majority of the devices' energy inefficiency in high traffic wireless local area netwo networks rks (WLANs). In this paper, we propose a novel sample-address sample-duration duration (SASD) scheme to solve the energy inefficiency of the packet overhearing problem. By adding a new SASD header, which contains the critical information, in front of the data packe packett at the physical layer, the SASD enables the devices to discern the required information in the energy-saving energy downclocking mode. Consequently, the non non-destination destination devices of the packet can switch to the sleeping mode to avoid the packet overhearing problem. proble We demonstrate the feasibility of the SASD through hardware experiments and evaluate its energy-saving saving performance through ns ns-2 2 simulations. The results show that the SASD can greatly outperform the existing approaches in the high traffic WLAN scenario.