Error-Resilient Image Transmission Over Multihop Wireless Networks

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Guarding against channel errors in wireless networks has been a challenging research problem, especially when transmitting time-constrained contents, like streaming video or image. Source diversity in the form of Multiple Description Coding (MDC) has been studied for guarding against wireless channel errors. In MDC, an image is broken into several equally important descriptions which can be sent over multiple paths to the destination. In this paper, the authors leverage the routing scheme to exploit the path diversity in such a way that multiple descriptions are sent over different paths in the network and are merged at the intermediate nodes for possible recovery of corrupted descriptions.