Institute of Electrical & Electronic Engineers
Traditional routing metrics designed for wireless networks are application agnostic. In this paper, the authors consider a wireless network where the application flows consist of video traffic. From a user-perspective, reducing the level of video distortion is critical. They ask the question "Should the routing policies change if the end-to-end video distortion is to be minimized?" Popular link-quality based routing metrics (such as ETX) do not account for dependence (in terms of congestion) across the links of a path; as a result, they can cause video flows to converge onto a few paths and thus, cause high video distortion.