Seongkwan Kim Sangwook Kang Sunshin An Enhanced service differentiation extensions for the IEEE 802.11a wireless network. 478-483 2004 conf/iscc/2004 ISCC http://doi.ieeecomputersociety.org/10.1109/ISCC.2004.1358451 db/conf/iscc/iscc2004.html#KimKA04