TEAM 2: 802.11 WLAN MAC layer modeling Mentor: Radu V. Balan 802.11 WLAN MAC Layer Modeling Lisa Driskell Yejun Gong Xueying Hu Purdue University Michigan Technological University University of Michigan Rashi Jain Mechie Nkengla New Jersey Institute of Technology University of Illinois-Chicago August 17, 2007
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802.11 WLAN MAC Layer Modeling · TEAM 2: 802.11 WLAN MAC layer modeling Mentor: Radu V. Balan 802.11 WLAN MAC Layer Modeling Lisa Driskell Yejun Gong Xueying Hu Purdue University
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TEAM 2: 802.11 WLAN MAC layer modeling
Mentor: Radu V. Balan
802.11 WLAN MAC Layer Modeling
Lisa Driskell Yejun Gong Xueying HuPurdue University Michigan Technological
Project Objective: Analyze the relationships of the parameters for a modified EO Markov model and validate the model under certain assumptions with (ns2) network simulations.
Objective
TEAM 2: 802.11 WLAN MAC layer modeling
Overview
MAC MAC
Packets Generated
IFQ
Agent/UDP Transmission
Agent/NullFinal
Destination
System Layout
TEAM 2: 802.11 WLAN MAC layer modeling
p
Overview
TEAM 2: 802.11 WLAN MAC layer modeling
Prob (packet dropped due to collision) =
Avg # of retries = )p1(p1
p L−−
1Lp +
pL(1-p) + pLp
…pb(1-p)…p2(1-p)p(1-p)1-pProbability
L…b…210Exact # retries
Previous Analysis of Markov Model
Overview
TEAM 2: 802.11 WLAN MAC layer modeling
• Analyzed Markov model• Compared analytical results with computed
results to verify the analysis.• Use analytical results compared with network
simulations to determine whether the system can indeed be modeled with a Markov chain.