Cheng Kuan Ng Zheng Yong Providing QoS in Congested IEEE 802.11 Hot Spots. 2-7 2005 conf/dfma/2005 DFMA http://doi.ieeecomputersociety.org/10.1109/DFMA.2005.43 db/conf/dfma/dfma2005.html#KuanY05