  Expanding the reach of the Internet is a topic of widespread interest today.
Google and Facebook, among others, have begun investing substantial research
efforts toward expanding Internet access at the edge. Compared to data center
networks, which are relatively over-engineered, last-mile networks are highly
constrained and end up being ultimately responsible for the performance issues
that impact the user experience.
  The most viable and cost-effective approach for providing last-mile
connectivity has proved to be Wireless ISPs (WISPs), which rely on
point-to-point wireless backhaul infrastructure to provide connectivity using
cheap commodity wireless hardware. However, individual WISP network links are
known to have poor reliability and the networks as a whole are highly cost
constrained.
  Motivated by these observations, we propose Wireless ISPs with Redundancy
(WISPR), which leverages the cost-performance tradeoff inherent in commodity
wireless hardware to move toward a greater number of inexpensive links in WISP
networks thereby lowering costs. To take advantage of this new path diversity,
we introduce a new, general protocol that provides increased performance,
reliability, or a combination of the two.
