Power Management in IEEE 802.11 WLAN using Proxy-Assisted WLAN Controller
Hand-held devices consume significant amount of energy while downloading large files or while streaming multimedia over a WLAN. IEEE 802.11 for WLANs provides PSM mechanism to reduce the energy consumption of a wireless device by allowing the wireless interface to go into sleep mode whenever possible. It is found that as STAtions (STAs) share the wireless channel at the packet level, wireless devices do not get enough opportunity to enter into the 'Doze' state, making PSM ineffective. In this paper, the authors' present implementation and experimental evaluation of an energy saving scheme implemented over a home-grown centralized WLAN performance enhancing device, ADWISER assisted by a proxy server.