Mesh Networking Protocols to Exploit Physical Layer Capabilities∗

Wireless mesh networks are becoming increasingly popular as a low-cost alternative to wired networks for providing high-speed last mile connectivity. A key challenge in mesh networks is the need for sufficient network capacity to meet the requirements of applications, especially when network density increases over time, and newer applications require higher throughputs. In this paper, we consider some approaches for improving network capacity by exploiting various physical layer capabilities. Specifically, we consider the use of multiple wireless channels, and improving utilization of any given channel by introducing “spatial backoff”, for improving network capacity. Through these example scenarios, we highlight the challenges involved and benefits possible by exploiting physical layer capabilities in mesh networks.