A Spectrum and Energy Cooperation Strategy in Hierarchical Cognitive Radio Cellular Networks

Kun Yueh Hsieh, Fan Shuo Tseng, Meng Lin Ku

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

In this letter, we proposed a novel spectrum and energy cooperation strategy in a hierarchical cognitive radio (HCR) cellular network. In our design, the primary receiver (PR) is equipped with a time-splitting energy harvesting (EH) device such that the primary system (PS) can share its spectrum to the secondary system (SS) and harvest the radiation for charging from the secondary base station (SB) in return. To achieve such a win-win strategy, the SB's precoder and the time-splitting factor are jointly optimized by maximizing the SS's information rate, providing that the PS's information rate and harvested energy are guaranteed. The design problem is equivalently formulated and solved via a semidefinite relaxation (SDR) optimization approach. Simulation results show the promising performance of the proposed cooperation strategy.

Original languageEnglish
Article number7409959
Pages (from-to)252-255
Number of pages4
JournalIEEE Wireless Communications Letters
Volume5
Issue number3
DOIs
StatePublished - Jun 2016

Keywords

  • Convex optimization
  • Energy harvesting (EH)
  • Hierarchical cognitive radio (HCR)
  • Semidefinite relaxation (SDR)

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