Title: A proactive spectrum handoff scheme with efficient spectrum utilisation for cognitive radio ad hoc networks

Authors: Krishan Kumar; Ganesh Prasad Mishra; Arun Prakash; Rajeev Tripathi

Addresses: Department of Electronics and Communication Engineering, Motilal Nehru National Institute of Technology, Allahabad 211004, India ' Department of Electronics and Communication Engineering, Motilal Nehru National Institute of Technology, Allahabad 211004, India ' Department of Electronics and Communication Engineering, Motilal Nehru National Institute of Technology, Allahabad 211004, India ' Department of Electronics and Communication Engineering, Motilal Nehru National Institute of Technology, Allahabad 211004, India

Abstract: This paper proposes a proactive spectrum handoff scheme for cognitive radio (CR) ad hoc networks by exploiting the efficient utilisation of the available wireless spectrum by CR. The novelty of this spectrum handoff scheme is that it is able to use the available free channels which are idle for one complete CR packet transmission as well as idle for less than one packet transmission. This has been done by channel scheduling and packet fragmentation to reduce unusable channels. In this scheme, spectrum sensing is done during packet transmission. The main contribution of the proposed spectrum handoff scheme is that it outperforms the existing proactive and reactive spectrum handoff schemes in terms of reduced CR average service time, improved throughput, and improved spectrum utilisation under the different primary user (PU) arrival rates. It is also analysed that the proposed spectrum handoff scheme is best suited scheme in heavy PU traffic arrival rates.

Keywords: average service time; channel scheduling; cognitive radio ad hoc networks; efficient spectrum utilisation; packet fragmentation; proactive; spectrum handoff.

DOI: 10.1504/IJIPT.2017.087550

International Journal of Internet Protocol Technology, 2017 Vol.10 No.3, pp.160 - 176

Received: 26 Mar 2016
Accepted: 09 Mar 2017
Published online: 18 Oct 2017 *

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