Secondary network connectivity of

Dong Liu, Erwu Liu, Zhengqing Zhang, Rui Wang, Yi Ren, Yanjun Liu, Wang Hei Ho, Xuefeng Yin, Fuqiang Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)


This letter investigates the connectivity of large-scale ad hoc cognitive radio networks (CRNs). Considering correct detection and false alarm probabilities ( P-{d} and P-{f}), we derive in closed-form the thinned density of active secondary users (SUs) in a secondary network. We show the active-probability and detectable radius of primary users (PUs) have a significant impact on the density of active SUs. Moreover, we find that increasing P-{f} of SUs considerably decreases the node density of active SUs. The connectivity of the secondary network is further analysed with the continuum percolation theory. Given the critical density of the secondary network without the impact of PUs, the critical density of the secondary network coexisting with PUs is estimated analytically. Simulations confirm our analysis.
Original languageEnglish
Article number6920000
Pages (from-to)2177-2180
Number of pages4
JournalIEEE Communications Letters
Issue number12
Publication statusPublished - 1 Dec 2014


  • Cognitive radio
  • Connectivity
  • continuum percolation
  • node density

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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