Rate adaptation and base station reconfiguration for battery efficient video download

With increasing usage of mobile devices to watch mobile video, the battery consumption of mobile devices will be dominated by video delivery and playback. In this paper, we develop battery efficient video delivery techniques that vary video transmission rate dynamically depending on battery and buffer levels of the mobile device, the channel conditions experienced, and video quality requirements while maximizing battery life and ensuring user experience. The proposed dynamic video rate adaptation techniques enable the base station to adapt the Multi Input Multi Output (MIMO) transceiver configurations to reduce battery current required by MIMO components on the mobile device. The proposed techniques also make the base station stop video transmission opportunistically, thereby eliminating the battery load imposed by the mobile MIMO components. Experiments conducted under various network conditions for various video download profiles show that more than 50% improvement in battery lifetime is possible in comparison to conventional video download techniques not aware of battery.