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A novel link adaptation scheme to enhance performance of IEEE 802.11g wireless LAN
Authors:Liquan Chen  Aiqun Hu
Affiliation:Department of Radio Engineering, Southeast University, Nanjing 210096, China
Abstract:A novel link adaptation scheme using linear Auto Regressive (AR) model channel estimation algorithm to enhance the performance of auto rate selection mechanism in IEEE 802.11g is proposed. This scheme can overcome the low efficiency caused by time interval between the time when Received Signal Strength (RSS) is measured and the time when rate is selected. The best rate is selected based on data pay load length, frame retry count and the estimated RSS, which is estimated from recorded RSSs. Simulation results show that the proposed scheme enhances mean throughput performance up to 7%, in saturation state, and up to 24% in finite load state compared with those non-estimation schemes, performance enhancements in average drop rate and average number of transmission attempts per data frame delivery also validate the effectiveness of the proposed scheme.
Keywords:Wireless Local Area Network (WLAN)  Link adaptation  Channel estimation  Auto ratc selection  Received Signal Strength (RSS)
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