Time-frequency spectrum leasing for OFDM-based Dynamic Spectrum Sharing systems

Abstract

In cognitive radio systems, Dynamic Spectrum Leasing (DSL) can improve the efficiency of spectrum utilization. In DSL, the primary user who has the license for a part of the bandwidth, decides to lease it to a secondary user or not. In this paper, we assume an OFDM-based system and perform the leasing operation in this system where the primary user leases the spectrum for a number of OFDM symbols to secondary users in exchange of a better quality-of-service achieved by secondary network cooperation. The secondary users use a part of the spectrum for relaying the primary data to the primary receiver and the rest of the spectrum for their own transmissions. More precisely, we propose a time-frequency domain leasing scheme. Simulation results show that both primary and secondary users benefit from this proposed spectrum sharing strategy.978-1-4244-7071-6/10/$26.00 2010 IEEE ©

A Complete Spectrum Sensing and Sharing Model for Cognitive Radio Ad Hoc Wireless Networks Using Markov Chain State Machine

“…In current communication networks, the average spectrum utilization is between 15% and 85%. Cognitive Radio (CR) is a solution to increase the spectrum utilization and ultimately the 2010; Toroujeni, Sadough, & Ghorashi, 2010). Spectrum is one of the most challenging network resources which need to be carefully consumed.…”