Abstract
In a cognitive radio (CR)-based multihop ad hoc network, data transmission between source and destination takes place in multiple hops through intermediate relay nodes. However, scheduling and efficient bandwidth resource allocation in distributed network is a very challenging task that hinders the real-world deployment of CR-based systems. In this chapter, the selection of concurrent communication pairs utilizing the same resources is formulated as a non-linear mixed integer programming problem. It is found mathematically that optimum resource allocation in a CR-based ad hoc network is an NP-hard problem. In this chapter, two novel physical-layer heuristic algorithms: proximity to origin and smallest circle first are proposed for efficient resource allocation, targeted towards dense networks. It is observed that both these heuristics significantly outperform the state-of-the-art algorithm in the literature, in terms of both schedule length and computational complexity. Significantly, unlike the algorithm in the literature, both proximity to origin and smallest circle first are scalable with an increase in the number of nodes in the network.
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Acknowledgments
The authors would like to thank Dr. Sinan Sinanovic and Prof. Harald Haas from the University of Edinburgh for their inputs during the initial stages of the research work. Notably, the authors would like to thank Irish Research Council for Science Engineering and Technology (IRCSET) and Enterprise Ireland for supporting this research.
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Venkataraman, H., Purohit, A., Pareek, R., Muntean, GM. (2012). Radio Resource Allocation for Cognitive Radio Based Ad hoc Wireless Networks. In: Venkataraman, H., Muntean, GM. (eds) Cognitive Radio and its Application for Next Generation Cellular and Wireless Networks. Lecture Notes in Electrical Engineering, vol 116. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1827-2_11
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DOI: https://doi.org/10.1007/978-94-007-1827-2_11
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