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Published Articles >> Table of Contents >> Abstract
9th International Conference on Information Technology (ICIT'06)
pp. 72-76
A Contention Window Based Differentiation Mechanism for providing QoS in Wireless LANs
Mayank Mishra, Indian Institute of Technology, Bombay, Powai, Mumbai, India
Anirudha Sahoo, Indian Institute of Technology, Bombay, Powai, Mumbai, India
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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/ICIT.2006.6
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| Abstract |
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Running real time applications over wireless LANs is becoming
common place. These applications require QoS. But
the most widely used wireless LAN, IEEE 802.11, does not
have QoS support. Hence, providing QoS in 802.11 WLANs
is an important issue due to its large installation base. In
this paper, we propose a priority based service differentiation
mechanism at the MAC layer. The MAC assigns different
contention windows to two priority classes to provide
service differentiation. The MAC protocol was designed
such that minimal change is required in 802.11 firmware and
yet the performance is comparable to 802.11e MAC. When
collision occurs, contention window is increased in a linear
fashion and the new contention windows for high and
low priority traffic become non-contiguous. This unique
method of contention window management provides better
relative performance between the two classes. We also propose
an enhancement to our base protocol that further increases
throughput at light load condition. We present our
simulation experiment results that show that our protocol
has performance comparable to 802.11e.
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 Additional Information
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Citation:
Mayank Mishra, Anirudha Sahoo,
"A Contention Window Based Differentiation Mechanism for providing QoS in Wireless LANs,"
icit,
pp. 72-76,
9th International Conference on Information Technology (ICIT'06),
2006
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