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Open AccessArticle

An Energy-Efficient and Robust Multipath Routing Protocol for Cognitive Radio Ad Hoc Networks

Department of Computer Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 61452, Korea
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Sensors 2017, 17(9), 2027; https://doi.org/10.3390/s17092027
Received: 13 July 2017 / Revised: 1 September 2017 / Accepted: 2 September 2017 / Published: 4 September 2017
(This article belongs to the Section Sensor Networks)
Routing in cognitive radio ad hoc networks (CRAHNs) is a daunting task owing to dynamic topology, intermittent connectivity, spectrum heterogeneity, and energy constraints. Other prominent aspects such as channel stability, path reliability, and route discovery frequency should also be exploited. Several routing protocols have been proposed for CRAHNs in the literature. By stressing on one of the aspects more than any other, however, they do not satisfy all requirements of throughput, energy efficiency, and robustness. In this paper, we propose an energy-efficient and robust multipath routing (ERMR) protocol for CRAHNs by considering all prominent aspects including residual energy and channel stability in design. Even when the current routing path fails, the alternative routing path is immediately utilized. In establishing primary and alternative routing paths, both residual energy and channel stability are exploited simultaneously. Our simulation study shows that the proposed ERMR outperforms the conventional protocol in terms of network throughput, packet delivery ratio, energy consumption, and end-to-end delay. View Full-Text
Keywords: cognitive radio ad hoc network; routing; energy efficiency; stability; multipath; routing metric cognitive radio ad hoc network; routing; energy efficiency; stability; multipath; routing metric
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Singh, K.; Moh, S. An Energy-Efficient and Robust Multipath Routing Protocol for Cognitive Radio Ad Hoc Networks. Sensors 2017, 17, 2027.

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