DIRC: Increasing Indoor Wireless Capacity Using Directional Antennas
by Peter Steenkiste, Xi Liu, Anmol Sheth, Michael Kaminsky, Konstantina Papagiannaki, Srinivasan Seshan
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| url: | http://www.cs.cmu.edu/~prs/15-744-F11/papers/dirc.pdf | | abstract: | The demand for wireless bandwidth in indoor environments
such as homes and oces continues to increase rapidly. Al-
though wireless technologies such as MIMO can reach link
throughputs of 100s of Mbps (802.11n) for a single link, the
question of how we can deliver high throughput to a large
number of densely-packed devices remains an open problem.
Directional antennas have been shown to be an e ective way
to increase spatial reuse, but past work has focused largely
on outdoor environments where the interactions between
wireless links can usually be ignored. This assumption is not
acceptable in dense indoor wireless networks since indoor
deployments need to deal with rich scattering and multipath
e ects. In this paper we introduce DIRC, a wireless network
design whose access points use phased array antennas to
achieve high throughput in dense, indoor environments. The
core of DIRC is an algorithm that increases spatial reuse
and maximizes overall network capacity by optimizing the
orientations of a network of directional antennas. We imple-
mented DIRC and evaluated it on a nine node network in
an enterprise setting. Our results show that DIRC improves
overall network capacity in indoor environments, while being
exible enough to adapt to node mobility and changing traffic
workloads. |
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