Resource allocation for two-way relay-assisted hybrid cognitive radio networks Articles uri icon

publication date

  • September 2017

start page

  • 53

end page

  • 60

issue

  • 3

volume

  • 9

International Standard Serial Number (ISSN)

  • 2180-1843

Electronic International Standard Serial Number (EISSN)

  • 2289-8131

abstract

  • In this paper,we focus on the resource allocation (RA) in Orthogonal Frequency Division Multiplexing Access (OFDMA) Two-Way Relay-Assisted (TWR) Cognitive Radio Network (CRN).The spectrum availability in hybrid spectrum sharing wasexamined based on a sensing-based spectrum sharing. Aggregate Weighted Ergodic Throughput (AWET) of the secondary network wasconsideredas the main objective of the RA.In addition to subcarrier assignment policy, the system design parameters are the transmission power of Secondary Users (SUs), Base Station(BS) and relay nodes,sensing parameters i.e.thesensing time and energy detection threshold. The main contributions of this paper isthe proposed novel sensing based RA algorithmand its near optimal solution adopting dual technique coupled with block coordinate descent algorithm for OFDMA TWR-assisted CRNs. Simulation results corroboratedthe theoretical findings and confirmedthe superiority of the hybrid spectrum sharing against overlay and underlay spectrum sharing

subjects

  • Telecommunications

keywords

  • cognitive radio; orthogonal frequency division multiplexing access; resource allocation; spectrum sensing; two way relay-assisted