A Fair Medium Access Control Protocol for Ad-hoc Networks with MIMO Links
by Karthikeyan Sundaresan, Raghupathy Sivakumar, Mary Ann Ingram, Tae-Young Chang
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| url: | http://www.ieee-infocom.org/2004/Papers/53_4.PDF | | abstract: | In this paper, we present a new medium access control (MAC)
protocol for ad-hoc networks with multiple input multiple output
(MIMO) links. Links that use multiple element arrays (MEAs)
at both ends are referred to as MIMO links. MIMO links are
known to provide extremely high spectral efficiencies in multipath
channels by simultaneously transmitting multiple independent
data streams in the same channel. MAC protocols have been
proposed in related work for ad-hoc networks with other classes
of smart antennas such as switched beam antennas. However,
as we substantiate in the paper, the unique characteristics of
MIMO links necessitate an entirely new MAC protocol. We
identify several advantages of MIMO links, and discuss key
optimization considerations that can help in realizing an effective
MAC protocol for such an environment. We present a centralized
algorithm that has the optimization considerations incorporated
in its design. Finally, we present a distributed protocol that
approximates the centralized algorithm, and compare its performance
against that of baseline protocols that are variants of
the CSMA/CA protocol. |
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