Physical layer driven protocol and algorithm design for energy-efficient wireless sensor networks
Proceedings of the 7th annual international conference on Mobile computing and networking
Directed diffusion for wireless sensor networking
IEEE/ACM Transactions on Networking (TON)
Convex Optimization
Event-to-sink reliable transport in wireless sensor networks
IEEE/ACM Transactions on Networking (TON)
A survey on wireless multimedia sensor networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Design of capacity-approaching irregular low-density parity-check codes
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
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In this work, we explore and evaluate data reliability in Wireless Sensor Networks (WSNs) using a novel approach that promises to increase the net network throughput with greater energy efficiency than prevalent schemes. Our results suggest that, under investigated scenarios, proposed approach can achieve reliable communication without fast depleting energy resources of individual sensor nodes. In particular, we propose a framework in which nodes collaborate, in a distributed fashion, to provide robustness against channel induced errors as data traverses the multi-hop network. Our scheme builds on two core concepts: partial decoding of incoming packets at intermediate nodes & directed diffusion of interest over the network for selective event based reliable path reinforcement. In addition, we use path diversity with selective budgeting of network energy resources to achieve data reliability. We show that the proposed scheme outperforms conventional error robustness approaches by considerable margin for a given network energy budget. We further discuss energy-distortion tradeoffs that may lead to greater network lifetime along-with maintaining a desired level of throughput. We use iteratively decodable LDPC codes to illustrate efficiency of our scheme.