Interference alignment for multihop wireless networks: challenges and research directions

IA has been widely regarded as a promising technique to handle mutual interference in wireless networks. Although there have been many studies on IA, most of the results are limited to the single-hop scenario. To date, research on IA in the networking community remains scarce. This stagnation underscores both the technical barrier in this area and the critical need to fill in this gap. This article offers a tutorial on three different forms of IA - spatial, temporal, and frequency - with a focus on their respective challenges, recent advances, and open problems in multi-hop wireless networks. We hope this article can bring state-of-the-art knowledge on IA to the wireless networking community.