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The IEEE 802.15.3 medium access control (MAC) protocol is an emerging
standard for high bit-rate wireless personal area networks, specifically
supporting high quality multimedia streams. To date there are no published
work on the performance of the IEEE 802.15.3 MAC with respect to some of
its configurable parameters and there has been no work related to simulation
of the MAC using the popular {\it ns-2} simulator. This paper aims to
address the aforementioned shortcomings by presenting an implementation of
the IEEE 802.15.3 MAC in the {\it ns-2} simulator and some preliminary
results from our studies of the IEEE 802.15.3 MAC in a variety of scenarios
with mixed traffic. We present results from our experimentations the
impact of the following MAC's operating parameters on TCP and real-time
flows: (i) channel access and time allocation periods, (ii) superframe
length, (iii) ACK policies, (iv) size of channel time allocation periods
(CTAPs), (v) contention channel access scheme, and (vi) performance of
TCP flows when run in the CTAP.
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