Authors: Ish Kumar Jain, Raghav Subbaraman, Dinesh Bharadia
Millimeter-wave communication with high throughput and high reliability is poised to be a gamechanger for V2X and VR applications. However, mmWave links are notorious for low reliability since they suffer from frequent outages due to blockage and user mobility. We build mmReliable, a reliable mmWave system that implements multi-beamforming and user tracking to handle environmental vulnerabilities. It creates constructive multi-beam patterns and optimizes their angle, phase, and amplitude to maximize the signal strength at the receiver. Multi-beam links are reliable since they are resilient to occasional blockages of few constituent beams compared to a single-beam system. We implement mmReliable on a 28 GHz testbed with 400 MHz bandwidth, and a 64 element phased array supporting 5G NR waveforms. Rigorous indoor and outdoor experiments demonstrate that mmReliable achieves close to 100% reliability providing 2.3x improvement in the throughput-reliability product than single-beam systems.
Ish Kumar Jain, Raghav Subbaraman, Dinesh Bharadia. 2021. Two beamsare better than one: Towards Reliable and High Throughput mmWave Links.InACM SIGCOMM 2021 Conference (SIGCOMM ’21), August 23–27, 2021,Virtual Event, USA.ACM, New York, NY, USA, 15 pages.https://doi.org/10.1145/3452296.3472924