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2009
ACM

R2D2: regulating beam shape and rate as directionality meets diversity

11 years 4 months ago
R2D2: regulating beam shape and rate as directionality meets diversity
We design, implement, and evaluate a vehicular communication system that improves uplink connectivity through multi-lobe beam pattern switching on a smart antenna. Directionality and base station-diversity are two well-known, independently developed mechanisms for improving the uplink connectivity of mobile clients. In this paper, we highlight that a system combining both mechanisms can achieve significant improvement in performance with multi-lobe beams that strike a tradeoff between directionality and diversity. This is in contrast to the mere steering of narrow beams used in conventional smart antenna systems. For tractability at vehicular speeds, our R2D2 system searches through a limited set of beam patterns with different numbers of lobes, and includes a two-stage algorithm that uses both runtime adaptation and cached candidate patterns. We design and evaluate several variants of run-time adaptation that tune the number and angle of lobes in the beam, and the bit rate. The desig...
Kishore Ramachandran, Ravi Kokku, Karthikeyan Sund
Added 25 Nov 2009
Updated 25 Nov 2009
Type Conference
Year 2009
Where MOBISYS
Authors Kishore Ramachandran, Ravi Kokku, Karthikeyan Sundaresan, Marco Gruteser, Sampath Rangarajan
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