Ad Hoc Networking With Directional Antennas: A Complete System Solution
by Ram Ramanathan, Jason Redi, Cesar Santivanez, David Wiggins, Stephen Polit
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| url: | http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1402579 | | abstract: | Directional antennas offer tremendous potential for
improving the performance of ad hoc networks. Harnessing this
potential, however, requires new mechanisms at the medium access
and network layers for intelligently and adaptively exploiting the
antenna system. While recent years have seen a surge of research
into such mechanisms, the problem of developing a complete ad hoc
networking system, including the unique challenge of real-life prototype
development and experimentation has not been addressed.
In this paper,we present utilizing directional antennas for ad hoc
networking (UDAAN). UDAAN is an interacting suite of modular
network- and medium access control (MAC)-layer mechanisms for
adaptive control of steered or switched antenna systems in an ad
hoc network. UDAAN consists of several new mechanisms—a directional
power-controlled MAC, neighbor discovery with beamforming,
link characterization for directional antennas, proactive
routing and forwarding—allworking cohesively to provide the first
complete systems solution. We also describe the development of a
real-life ad hoc network testbed using UDAAN with switched directional
antennas, and we discuss the lessons learned during field
trials. High fidelity simulation results, using the same networking
code as in the prototype, are also presented both for a specific scenario
and using random mobility models. For the range of parameters
studied, our results show that UDAAN can produce a
very significant improvement in throughput over omnidirectional
communications. |
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