MobiSteer: using steerable beam directional antenna for vehicular network access
Proceedings of the 5th international conference on Mobile systems, applications and services
R2D2: regulating beam shape and rate as directionality meets diversity
Proceedings of the 7th international conference on Mobile systems, applications, and services
Power-efficient directional wireless communication on small form-factor mobile devices
Proceedings of the 16th ACM/IEEE international symposium on Low power electronics and design
Directional antenna diversity for mobile devices: characterizations and solutions
Proceedings of the sixteenth annual international conference on Mobile computing and networking
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All current mobile devices are omni directional in transmission, which not only limits device energy efficiency but also poses a significant challenge toward network capacity through inter-link interference. In this work, we make mobile devices directional with beamsteering. By allowing a dynamic number of antennas in beamsteering, we reveal an important tradeoff between device energy efficiency and network capacity. We then provide a distributed algorithm called BeamAdapt that allows each mobile device in the network to closely approach the optimal tradeoff, with minimum aggregated device power to achieve certain network capacity. We also offer a cellular system realization of BeamAdapt as well as a Qualnet-based evaluation. The results show the effectiveness of BeamAdapt in device power reduction without sacrificing network throughput.