3D Beam-steering For 60 GHZ Wireless Network:method Research And System Implementation

With the development of wireless communication technology,requirements for wireless network bitrate is also increasingly rapidly.60 GHz millimeter-wave technology has gradually become a new research hotspot because of its multi-Gbps bitrate.To increase the signal transmission distance,60 GHz uses directional beams to communicate.In the real 3D space,the user's motion is complex and changeable.The combination of location and orientation dynamics leads to exponential growth of beam searching complexity,which substantially hinders the rapid recovery of the link and seriously affects the performance of the 60 GHz wireless network.In this paper,we first conduct an extensive measurement to analyze the impact of 3D motion on 60 GHz link performance,in the context of VR and Miracast applications.We find that 3D motion exhibits inherent non-predictability,so conventional beam steering solutions,which targets 2D scenarios with lower search space and short-term motion coherence,fail in practical.And then we propose an efficient 3D beam-steering called Orthogonal Scanner(OScan)by studying the interaction between 3D beamforming and 60 GHz signal propagation.OScan reduces the overhead of beam-steering by an order of magnitude through the smart compression of the 3D beam search space.Further more,we designed and implemented a 3D millimeter wave beam-steering system to test OScan.The experimental results show that compared with the most commonly used technologies,OScan significantly reduces the overhead of beam steering and brings significant throughput gains.