understanding and improving the spatial reuse in multi-hop wireless networks
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Understanding and Improving the Spatial Reuse in Multi-hop
Wireless Networks
Tae-Suk Kim, Hyuk Lim, and Jennifer C. Hou.The Department of Computer Science,
University of Illinois, Urbana-Champaign
IEEE Transactions on Mobile Computing, Vol. 7, No. 10, October 2008
Outline
• Introduction• Network Model and Analysis• Power and Rate Control Algorithm• Simulation Study• Conclusions
Introduction
• In Multi-hop Wireless Networks– Collision problem
• 4 way-handshake• Physical carrier sensing range
– Spatial reuse • Power control• Lower data rate
Goal
• Propose a distributed algorithm– Power control Spatial reuse – Rate adaption Higher data rate
Interference Model and Analysis
Network Capacity Model and Analysis
carrier sensing in an area
Power and Rate Control AlgorithmStep 1• Determine the power range
– TX0 : Pmin TX(1,2,3,4,5,6) : Pmax
>
Algorithm – Step 2
• Determine the carrier sense threshold–
Algorithm – Step 2
• The interference level perceived at TX
Simulation Study : (NS2 v2.28)
• Algorithm: PRC, Static, DSB, and Greedy Power Control
• Scenario : Random and Grid
Simulation Results : Random Topology
Simulation Results : Rrid Topology
Conclusions
• The relation of two control knods in the PHY/MAC layer– Transmission power– Carrier sense threshold
• Proposed a localized PRC algorithm– Higher data rate Ptx/Tcs
– Spatial Reuse Efficient power control scheme
Thank You.
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