Irshad A. Qaimkhani Ekram Hossain A novel QoS-aware MAC protocol for voice services over IEEE 802.11-based WLANs. 71-84 2009 9 Wireless Communications and Mobile Computing 1 http://dx.doi.org/10.1002/wcm.643 db/journals/wicomm/wicomm9.html#QaimkhaniH09