Paper Info
Title
Video-Aware Rate Adaptation for MIMO WLANs
Abstract
The IEEE 802.11n standard supports very high physical layer data rates using Multiple Input Multiple Output (MIMO) antenna technologies. Despite such high rates, High Definition (HD) video streaming is still challenging in WLAN deployments. In this paper, we show that the wireless channel probing overhead of existing 802.11n data rate adaptation mechanisms can be detrimental to HD video performance. We propose VARA, a Video-Aware Rate Adaptation protocol that addresses this problem by adapting the frequency and timing of wireless probing to both video encoding rate variations and wireless channel variations. In addition, VARA employs novel strategies that multiplex several Variable Bit Rate (VBR) HD video streams by minimizing their aggregate peak rate requirement. Our experimental evaluations for static and mobile scenarios in a MIMO 802.11n wireless testbed demonstrate the practical benefits of VARA over state-of-the-art 802.11n rate adaptation protocols.
Year
DOI
Venue
2011
10.1109/ICNP.2011.6089071
ICNP
Keywords
Field
DocType
high rate,hd video stream,mimo wlans,video encoding rate variation,hd video performance,variable bit rate,wireless channel variation,aggregate peak rate requirement,data rate adaptation mechanism,multiple input multiple output,video-aware rate adaptation,rate adaptation protocol,wireless communication,encoding,protocols,mimo,multiplexing
Wireless,Computer science,Video streaming,Computer network,MIMO,Communication channel,Real-time computing,Physical layer,Multiplexing,Encoding (memory),Variable bitrate
Conference
ISSN
Citations 
PageRank 
1092-1648
6
0.47
References 
Authors
13
3
Name
Order
Citations
PageRank
An (Jack) Chan1422.34
Henrik Lundgren252359.99
Theodoros Salonidis3124793.31