Cross-Layering in Future Wireless Networks: From Compact Full-duplex Radios to City-Scale Experimentation
Future wireless networks will feature the technology "sweet spot" of high bandwidth, low latency, and powerful edge computing, thereby enabling a broad new class of applications such as augmented reality, autonomous vehicles, and smart cities. Realizing this vision requires theoretical and experimental research efforts focusing on emerging communication technologies (e.g., full-duplex wireless, beamforming, millimeter-wave, and fiber-optics) and their interactions with the higher layers in the network stack.
Full-duplex wireless - simultaneous transmission and reception at the same frequency - is one of the emerging technologies that has the potential to increase spectrum efficiency and reduce communication latency. In this talk, I will first describe our design and optimization of compact single-antenna full-duplex radios which are suitable for hand-held devices. Our customized full-duplex radios achieve wideband self-interference cancellation using the technique of frequency-domain equalization (FDE), and are experimentally evaluated at the node-, link-, and network-level. I will then present a novel approach to enable full-duplex operation in multi-antenna systems by repurposing beamforming degrees of freedom to achieve both wideband self-interference cancellation and improved data rate gain. I will also review our results on throughput-optimal distributed scheduling in heterogeneous networks with both half- and full-duplex users.