Degraded link-disjoint multipath routing in ad hoc networks
ISWPC'09 Proceedings of the 4th international conference on Wireless pervasive computing
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Multiple Description (MD) and Layered Coding (LC)are two source-coding approaches proposed for adaptiveand robust video streaming over lossy networks. Bothstreaming methods aim to improve the streaming qualityby transmitting the generated multiple sub-bitstreams overpartially link-disjoint paths. However, the achieved qualitiesheavily depend on the media characteristics, path conditionsand application requirements. In order to attainthe highest quality, we study optimal multi-path selectionmethods for both MD and LC streaming. The simulationsrun over an overlay infrastructure show 9.0 - 12.5 dB peaksignal-to-noise ratio (PSNR) improvement when the video isstreamed over intelligently selected multiple paths insteadof the shortest path or maximally link-disjoint paths. By thehelp of the proposed path selection methods, the end usersestimate the expected qualities of MD and LC streaming forthe given network conditions and application requirementsprior to the streaming, which allows the users to make achoice accordingly.