Harnessing Frequency Domain for Cooperative Sensing and Multi-channel Contention in CRAHNs
- 16 December 2013
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Wireless Communications
- Vol. 13 (1), 440-449
- https://doi.org/10.1109/twc.2013.120413.130767
Abstract
It is known that current fixed spectrum assignment policy has made the spectrum resource significantly underutilized. As a promising solution, cognitive radio emerges and shows its advantages. It allows the unlicensed users to opportunistically access the spectrum not used by the licensed users. To ensure that the unlicensed users can identify the vacate spectrum fast and accurately without interfering the licensed users, cooperative sensing is explored to improve the sensing performance by leveraging spatial diversity. However, cooperation gain can be compromised dramatically with cooperation overhead. Furthermore, when sensing decisions are made, contention on spectrum access also contributes a lot to the control overhead, especially in the distributed networks. Motivated by this, we propose a novel MAC design, termed Frequency domain Cooperative sensing and Multi-channel contention (FCM) for Cognitive Radio Ad Hoc Networks (CRAHNs). FCM is proposed for OFDM (Orthogonal Frequency Division Multiplexing) modulation based communication systems, which moves cooperative sensing and multi-channel contention from time domain into frequency domain. Therefore, control overhead caused by cooperation and contention can be significantly reduced. Meanwhile, the sensing and access performance can be both guaranteed. Extensive simulation results show that FCM can effectively reduce the control overhead, and improve the average throughput by 220% over Traditional Cooperative MAC for CRAHNs.This publication has 22 references indexed in Scilit:
- Attack Prevention for Collaborative Spectrum Sensing in Cognitive Radio NetworksIEEE Journal on Selected Areas in Communications, 2012
- Energy-Efficient Cooperative Spectrum Sensing in Cognitive Radio NetworksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2011
- Practical, real-time, full duplex wirelessPublished by Association for Computing Machinery (ACM) ,2011
- Cooperative spectrum sensing in cognitive radio networks: A surveyPhysical Communication, 2011
- Listen (on the frequency domain) before you talkPublished by Association for Computing Machinery (ACM) ,2010
- Fine-grained channel access in wireless LANPublished by Association for Computing Machinery (ACM) ,2010
- Pricing for Uplink Power Control in Cognitive Radio NetworksIEEE Transactions on Vehicular Technology, 2010
- Bandwidth efficient combination for cooperative spectrum sensing in cognitive radio networksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2010
- Optimization of cooperative spectrum sensing with energy detection in cognitive radio networksIEEE Transactions on Wireless Communications, 2009
- Cooperative Spectrum Sensing for Cognitive Radios under Bandwidth ConstraintsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007