Packet loss effects on MPEG video sent over the public Internet
MULTIMEDIA '98 Proceedings of the sixth ACM international conference on Multimedia
Performance comparison of the emerging H.264 video coding standard with the existing standards
ICME '03 Proceedings of the 2003 International Conference on Multimedia and Expo - Volume 2
802.11 Wireless Networks: The Definitive Guide, Second Edition
802.11 Wireless Networks: The Definitive Guide, Second Edition
Youtube traffic characterization: a view from the edge
Proceedings of the 7th ACM SIGCOMM conference on Internet measurement
IEEE Communications Magazine
Overview of the H.264/AVC video coding standard
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
International Journal of Handheld Computing Research
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Although a number of investigations have been conducted using IEEE 802.11e enabled networks to stream class differentiated video, very few reports are available based on a real testbed. In our work, we set up a wireless testbed for H.264 video streaming through assigning the partitioned video packets onto the DCF MAC layer and different access classes of the EDCA MAC layer. We investigate three assignment schemes: 1) DCF is used and all the traffic is treated equally; 2) video traffic is assigned to each of the access classes in turn; and 3) the packets are assigned according to their importance and the class priority. In addition to the video stream we introduce TCP traffic from three clients in the best effort class. We show that video quality can be improved through properly assigning packets to wireless access classes compared to the standard best effort scheme. Importantly, we show, based on our testbed results, that the single class assignment can achieve better performance than the multi-class assignment suggested by other researchers. Finally we show that virtual contention between traffic classes at the access point is an important issue to address.