Network-adaptive and energy-efficient multi-user video communication over QOS enabled WLAN

This paper addresses energy efficient packet scheduling for the transmission of multiple video streams over a wireless LAN. By exploiting the temporal scalability present in the prediction dependencies among video frames, a centralized cross-layer optimization solution is proposed, which is built on the HCF Controlled Channel Access (HCCA) of the IEEE 802.11e standard. Our performance study shows that the proposed solution saves energy under good channel conditions, and achieves quality gains more than 4.5dB on bad channels or under heavily loaded network conditions.