Opportunistic Spectrum Sharing Schemes for CDMA-Based Uplink MAC in Cognitive Radio Networks
- 24 March 2011
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal on Selected Areas in Communications
- Vol. 29 (4), 716-730
- https://doi.org/10.1109/jsac.2011.110405
Abstract
We consider a wireless cognitive radio network in which a set of secondary users (SUs) opportunistically utilize the wireless spectrum licensed to the primary users (PUs) to transmit packets to the secondary base station (SBS). It is challenging to maximize the spectrum utilization while limiting the interference imposed to PUs due to SUs. To achieve the optimal tradeoff between the spectrum utilization and the interference caused by SUs, we propose the adaptive spectrum sharing schemes for code division multiple access (CDMA) based cognitive medium access control (MAC) in the uplink communications over the cognitive radio networks. Our proposed schemes address the joint problems of channel sensing, data transmission, and power and rate allocations. Under our proposed schemes, the SUs can adaptively select between the intrusive spectrum sharing and the non-intrusive spectrum sharing operations to transmit data to SBS based on the channel utilization, traffic load, and interference constraints. Our proposed schemes enable the SUs to efficiently utilize the available frequency spectrum which is licensed to the PUs while stringently limiting the interference to the PUs. Also conducted are extensive simulations to validate and evaluate our proposed schemes, which show the superiority of our proposed schemes as compared with the other schemes.Keywords
This publication has 27 references indexed in Scilit:
- CREAM-MAC: Cognitive Radio-EnAbled Multi-Channel MAC Protocol Over Dynamic Spectrum Access NetworksIEEE Journal of Selected Topics in Signal Processing, 2010
- Cognitive interference-minimizing code assignment for underlay CDMA networks in asynchronous multipath fading channelsPublished by Association for Computing Machinery (ACM) ,2009
- Optimal spectrum sensing framework for cognitive radio networksIEEE Transactions on Wireless Communications, 2008
- Optimal Competitive Algorithms for Opportunistic Spectrum AccessIEEE Journal on Selected Areas in Communications, 2008
- Cross-Layer Based Opportunistic MAC Protocols for QoS Provisionings Over Cognitive Radio Wireless NetworksIEEE Journal on Selected Areas in Communications, 2008
- Performance Analysis in CDMA-Based Cognitive Wireless Networks with Spectrum UnderlayPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2008
- KNOWS: Cognitive Radio Networks Over White SpacesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007
- Dynamic Spectrum Access with QoS and Interference Temperature ConstraintsIEEE Transactions on Mobile Computing, 2007
- A Game-Theoretic Approach to Competitive Spectrum Sharing in Cognitive Radio NetworksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007
- A Two-Phase Channel and Power Allocation Scheme for Cognitive Radio NetworksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006