Cooperative Spectrum Sensing in Cognitive Radio, Part II: Multiuser Networks

• Published in: IEEE transactions on wireless communications Vol. 6; no. 6; pp. 2214 - 2222
• Main Authors: Ganesan, G., Li Ye
• Format: Journal Article
• Language: English
• Published: Piscataway, NJ IEEE 01-06-2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Applied sciences; Carriers; Chromium; Cognitive radio; Collaborative work; Cooperation; Error analysis; Exact sciences and technology; Frequency; Gain; Military computing; Monitoring; Monitors; Networks; Protocols; Radio; Radiocommunication specific techniques; Radiocommunications; Relays; Sufficient conditions; Telecommunications; Telecommunications and information theory; Wireless communication; Multiple access; Sufficient condition; Decentralized system; pairing protocols; Single carrier; Cognitive radio; Algorithm; User need; Software radio; cooperation; decentralized networks
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2007.05776

In cognitive networks, cognitive (unlicensed) users need to continuously monitor spectrum to detect the presence of primary (licensed) users. In part I, we have illustrated the benefits of cooperation in cognitive radio by considering a simple two-user network and showing improvement in agility. In part II, we investigate multiple cognitive user networks. We first consider multiuser single carrier networks and develop sufficient conditions for agility gain when the cognitive population is arbitrarily large. We then propose a practical algorithm which allows cooperation between cognitive users in random networks. Finally, we provide an example to illustrate the concepts developed in this paper.