Delay-constrained adaptive early drop for real-time video delivery over IEEE 802.11 wireless networks

Authors:
Sooyong Lee;Giwon Yang;Yohaan Yoon;Kyunghee Lee;Soon Joo Hyun;Ben Lee;Myungchul Kim
Affiliations:
Samsung Electronics, Suwon, Republic of Korea;Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;Electronics and Telecommunication Research Institute, Daejeon, Republic of Korea;Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;Oregon State University, Corvallis, OR;Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
Venue:
Proceedings of the 7th International Conference on Ubiquitous Information Management and Communication
Year:
2013

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Abstract

The recent proliferation of mobile devices increases the demand for high-quality real-time video services in wireless network. However, the characteristics of wireless medium such as interferences and ease of congestion make it difficult for the delivered video to be played out in a timely manner. The latency introducedby those wireless characteristics severely degrades the perceptual quality of real-time videodue to intermittent playoutat the client side. In this paper, we propose adelay-constrained adaptive early drop scheme for real-time video delivery over IEEE 802.11 wireless networks. In our scheme, an intermediate router forcibly discards the less important video packetswhich are expected not to be played out in time. The simulation results demonstratethat the proposed scheme can achieve 20% lower end-to-end delay and60% less frame loss ratio with32% better Peak Signal-to-Noise Ratio (PSNR) compared to the existing cross-layer mapping schemes.