Evaluation of the Minstrel-HT Rate Adaptation Algorithm in IEEE 802.11n WLANs

Teuku Yuliar Arif (Syiah Kuala University, Indonesia)

Wireless local area network (WLAN) has grown rapidly and has been used extensively as a wireless access technology. In the new WLAN standard IEEE 802.11n, there are more options data rate based on the width of the channel 20 / 40MHz, guard interval 800 / 400ns and the number of spatial streams 1/2/3/4. Algorithm rate adaptation (RA) is required for the selection of the data rate according to channel conditions to produce optimal throughput. Minstrel-HT algorithms specifically used in 802.11n that works based on the statistical table of the results of the sampling rate. Sampling rate that results in the highest throughput and highest probability of successful delivery of the packet is used as the data rate for the next packet delivery. In this paper we evaluate the performance of Minstrel-HT in IEEE 802.11n WLANs. We have used the network simulator NS-3.25 and Minstrel-HT performance is evaluated in a non-fading channel and channel fading. Our simulation results show Minstrel-HT fail to provide optimal throughput in both the non-fading channels and the channel fading. In the future work, we will optimize Minstrel-HT sampling method in order to produce optimal throughput in IEEE 802.11n WLANs.

Journal: International journal of simulation: systems, science & technology V18

Published: Mar 31, 2017

DOI: 10.5013/IJSSST.a.18.01.11