A robust, high throughput MAC protocol for next generation WLANs
Varanasi, Anantakrishna Kanti
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This thesis compares the IEEE 802.11e Medium Access Control protocol, which is an emerging standard for wireless local area networks providing Quality of Service and a newer and more efficient Multi-User Polling protocol (MUP) for enhancing MAC performance for delay sensitive real time traffic. Such a scheme if found to have better performance can be employed in next generation 802.11 enabled cell phones with VoIP over WLAN capability. This thesis provides an analysis of the enhancements in 802.11e and compares the performance of 11e with the legacy 802.11 standard. 802.11e is also compared with Multi-User Polling in terms of throughputs and average delay under an increasing number of stations. A scheduling algorithm is developed to ensure fairness to all stations in the system. The effects of frame aggregation in terms of robustness against channel errors are also studied. The Multi-User Polling protocol incorporates a solution for the problem of TCP asymmetry in WLANs.