Packet handling strategies to improve video QoS over 802.11e WLANs

MacKenzie, Richard; Hands, David S.; O’Farrell, T.

doi:10.1109/pimrc.2009.5449894

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Bucciol et al [2007] use a perceptual ARQ, however it is unclear how distortion thresholds can be created for each packet in a video, without even considering the impact of I/P/B frame packaging. Existing MAC based approaches focus on application delay constraints of video delivery but are quite agnostic to video quality [Chen et al 2010;MacKenzie et al 2009;She et al 2011]. In selectively dropping video packets, the most significant point is not in finding allowable number/threshold of video packet-drops, but in figuring out which video packets can be dropped depending on the video properties in the given network conditions.…”

Section: Related Workmentioning

confidence: 99%

Efficient MAC for Real-Time Video Streaming over Wireless LAN

Baik

Pande

Mohapatra

2015

ACM Trans. Multimedia Comput. Commun. Appl.

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Wireless communication systems are highly prone to channel errors. With video being a major player in Internet traffic and undergoing exponential growth in wireless domain, we argue for the need of a Videoaware MAC (VMAC) to significantly improve the throughput and delay performance of real-time video streaming service. VMAC makes two changes to optimize wireless LAN for video traffic: (a) It incorporates a Perceptual-Error-Tolerance (PET) to the MAC frames by reducing MAC retransmissions while minimizing any impact on perceptual video quality; and (b) It uses a group NACK-based Adaptive Window (NAW) of MAC frames to improve both throughput and delay performance in varying channel conditions. Through simulations and experiments, we observe 56-89% improvement in throughput and 34-48% improvement in delay performance over legacy DCF and 802.11e schemes. VMAC also shows 15-78% improvement over legacy schemes with multiple clients. ACM Reference Format:Eilwoo Baik, Amit Pande, and Prasant Mohapatra. 2015. Efficient MAC for real-time video streaming over wireless LAN. ACM Trans. Multimedia Comput. Commun.

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