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Wireless Networks

, Volume 24, Issue 8, pp 3045–3061 | Cite as

Connectivity of cognitive radio ad hoc networks with directional antennas

  • Yuanyuan Wang
  • Qiu Wang
  • Hong-Ning Dai
  • Haibo Wang
  • Zhiguo Shi
Article
  • 193 Downloads

Abstract

In cognitive radio ad hoc networks, omni-directional antennas are typically used at both primary users (PUs) and secondary users (SUs), which can cause high interference. We name such cognitive radio ad hoc networks with omni-directional antennas as OMN-CRAHNs. Different from omni-directional antennas, directional antennas can concentrate the transmission on desired directions and can consequently reduce interference in undesired directions. In this paper, we investigate both the local connectivity and the overall connectivity of cognitive radio ad hoc networks with directional antennas (DIR-CRAHNs), in which both PUs and SUs are equipped with directional antennas. In particular, we establish a theoretical framework to analyze both the probability of node isolation and the probability of connectivity of DIR-CRAHNs and OMN-CRAHNs. Our analytical results show that DIR-CRAHNs can have higher connectivity than OMN-CRAHNs.

Keywords

Connectivity Cognitive radio ad hoc network Directional antennas 

Notes

Acknowledgements

The work described in this paper was supported by Macao Science and Technology Development Fund under Grant No. 096/2013/A3. The authors would like to thank anonymous reviewers and editors for their constructive comments. The authors would like to express their appreciation for Gordon K.-T. Hon for his thoughtful discussions.

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.Macau University of Science and TechnologyMacaoPeople’s Republic of China
  2. 2.Beijing Jiaontong UniversityBeijingPeople’s Republic of China
  3. 3.Zhejiang UniversityHangzhouPeople’s Republic of China

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