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2007

Directional geographical routing for real-time video communications in wireless sensor networks

8 years 4 months ago
Directional geographical routing for real-time video communications in wireless sensor networks
In this paper, we address the problem of real-time video streaming over a bandwidth and energy constrained wireless sensor network (WSN) from a small number of dispersed video-sensor nodes (VNs) to a sink by combining forward error correction (FEC) coding with a novel multipath rouing scheme called directional geographical routing (DGR). DGR constructs an application-specific number of multiple disjointed paths for a VN to transmit parallel FEC-protected H.26L real-time video streams over a bandwidth-limited, unreliable networking environment. The multiple paths in DGR facilitate load balancing, bandwidth aggregation, and fast packet delivery. Extensive simulation experiments over randomly generated WSNs show that DGR has the following advantages: (i) lower delay, (ii) substantially longer network lifetime, and (iii) a better received video quality. In particular, DGR improves the average video peak signal-tonoise ratio (PSNR) by up to 3dB, compared to a traditional geographic routin...
Min Chen, Victor C. M. Leung, Shiwen Mao, Yong Yua
Added 12 Dec 2010
Updated 12 Dec 2010
Type Journal
Year 2007
Where COMCOM
Authors Min Chen, Victor C. M. Leung, Shiwen Mao, Yong Yuan
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