Demo: routing overlay for reliable communication in networks with blockage

This work addresses the challenge in providing reliable communication in mobile networks with intermittent, on/off links through the use of a routing overlay designed to deal with these channel impairments. Link blockage is a predominant feature of mobile networks operating at 10+ GHz frequencies, and current techniques are ill-suited to address this problem. We present an approach comprised of multiple-path routing with end-to-end coding, queue-length-based congestion control, and a negative acknowledgement (NACK) loss-recovery scheme; these are implemented in an IP-overlay. The demonstrated scenario consists of two clusters of mobile ground vehicles operating in an ``urban canyon'' environment. Blockage occurs on satellite links connecting the clusters. Through the use of interactive displays, demo participants gain an understanding of routing behavior.