IMDEA Networks Institute Publications Repository

Steering with Eyes Closed: mm-Wave Beam Steering without In-Band Measurement

Nitsche, Thomas and B. Flores, Adriana and Knightly, Edward W. and Widmer, Joerg (2015) Steering with Eyes Closed: mm-Wave Beam Steering without In-Band Measurement. In: The 34th IEEE International Conference on Computer Communications (IEEE INFOCOM 2015), 26 April - 1 May 2015, Hong Kong, China.

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Millimeter-wave communication achieves multi-Gb/sec data rates via highly directional beamforming to overcome pathloss and provide the desired SNR. Unfortunately, establishing communication with sufficiently narrow beamwidth to obtain the necessary link budget is a high overhead procedure in which the search space scales with device mobility and the product of the sender-receiver beam resolution. In this paper, we design, implement, and experimentally evaluate Blind Beam Steering (BBS) a novel architecture and algorithm that removes in-band overhead for directional mm-Wave link establishment. Our system architecture couples mm-Wave and legacy 2.4/5 GHz bands using out-of-band direction inference to establish (overhead-free) multi Gb/sec mm-Wave communication. Further, BBS evaluates direction estimates retrieved from passively overheard 2.4/5 GHz frames to assure highest mm-Wave link quality on unobstructed direct paths. By removing in-band overhead, we leverage mm-Wave's very high throughput capabilities, beam-width scalability and provide robustness to mobility. We demonstrate that BBS achieves 97.8% accuracy estimating direction between pairing nodes using at least 5 detection band antennas. Further, \sys successfully detects unobstructed direct path conditions with a rate of 96.5\% and reduces the IEEE 802.11ad beamforming training overhead by 81%.

Item Type: Conference or Workshop Papers (Paper)
Uncontrolled Keywords: wireless; mm-wave; 802.11ad; beam steering; dual-band; emitter locating
Depositing User: Thomas Nitsche
Date Deposited: 01 Dec 2014 08:48
Last Modified: 18 Mar 2016 09:52

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