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Experimental evaluation of QoS mechanism defined in IEEE 802.11e standard is presented in this paper. Measurements were carried out in controlled laboratory conditions, with and without configured QoS. Mean and maximum delay, jitter and packet loss are measured in voice communications between two clients, competing with other voice clients. The results show that QoS mechanism brings significant improvements...
The IEEE 802.11 legacy standard could not offer QoS support for time-critical applications. Considerable research efforts on medium access control (MAC) layer have been carried out important enhancements on improving QoS for IEEE 802.11 device implemented standard. Among them, IEEE 802.11e standard is the QoS enhanced proposed by the IEEE. The contention based channel access method called enhanced...
Nowadays IEEE 802.11 family is the most popular technology amongst wireless protocols including Bluetooth, UWB and WiMAX for wireless services, among which media streaming such as voice over Internet Protocol (VoIP) and IPTV are most demanded with high challenge. To accommodate the QoS issues, EDCA and HCCA functions are defined in IEEE 802.11e. However, EDCA provides QoS based on probability, so...
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