Computer Science ›› 2017, Vol. 44 ›› Issue (7): 84-88.doi: 10.11896/j.issn.1002-137X.2017.07.015

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Impact of Path Loss Exponent on Interference and Carrier Sensing Performance Metrics of 802.11 WLANs

WANG Yue   

  • Online:2018-11-13 Published:2018-11-13

Abstract: We analyzed how path loss exponent affects the interference and carrier sensing performance of 802.11 WLANs and revealed the advantages of larger path loss exponent.This work is based on the SNR threshold reception model and fixed carrier sensing thresholds,and the main bit rates of 802.11a/b/g/n are considered.Firstly,increasing path loss exponent increases SIR and decreases interference range.Secondly,the optimal network capacity increases with the path loss exponent.Thirdly,analysis and simulation reveal that larger path loss exponent results in larger carrier sensing accuracy.The performance of WLANs improves in cities because dense buildings and population increase path loss exponent.

Key words: Path loss exponent,Network capacity,Carrier sensing,802.11,WLAN

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