Video-Aware Multicast Opportunistic Routing Over 802.11 Two-Hop Mesh Networks

Abstract

Opportunistic routing benefits from the broadcast nature of wireless communication and outperforms the packet losses occurring in a wireless environment, especially in the case of multicast. In this work, we present and evaluate the performance of an innovative video-aware multicast opportunistic routing algorithm in 802.11 two-hop mesh networks. We enhance a state-of-the-art opportunistic routing scheme, namely MORE, that offers multicast but is not efficiently applicable to video streaming applications. Our scheme is able to support real-time applications with time constraints. We improve the received video quality by classifying/prioritizing the video traffic and efficiently orchestrating the multiple transmitters involved in multicast routing. The presented scheme, namely ViMOR, is evaluated through extended experimentation in the wireless testbed of NITOS. ViMOR succeeds in increasing the perceived video quality by up to 270% in a few scenarios or up to 175% in average, compared to MORE.