Performance Compensation of IEEE 802.11e QoS stations with Coexistence of Legacy 802.11 stations

This paper shows that the deteriorated performance of IEEE 802.11e QoS stations with coexistence of IEEE 802.11 stations can be compensated by changing the value of AIFS or contention window size of QoS or non-QoS stations in IEEE 802.11e. The performance of IEEE 802.11e QoS stations with coexistence of IEEE 802.11 stations deteriorates compared to the use of only IEEE 802.11e stations. The use of the smaller contention window minimum (CWmin) of QoS, the larger contention window maximum (CWmax) of non-QoS, or the larger AIFS value of non-QoS can compensate the aggregated throughput of QoS stations, respectively.