Evolution of Open Spectrum Sharing Technology-A Sur
E.Mohan1, R.Kangayen2, R.Lavanya3, N.Deepa4
1Dr.E.Mohan, Professor, Department of Computer Science & Engineering, Kanchipuram, India.
2R. Kangayen, Assistant Professor, Department of Electronics & Communication Engineering, Engineering, Kanchipuram, India.
3R. Lavanya, Assistant Professor, Department of Electronics & Communication Engineering,  Kanchipuram, India.
4N. Deepa, Assistant Professor, Department of Electronics & Communication Engineering,  Kanchipuram, India.
Manuscript received on March 13, 2013. | Revised Manuscript received on April 01, 2013. | Manuscript published on April 30, 2013. | PP: 143-147 | Volume-2, Issue-4, April 2013. | Retrieval Number: D1345042413/2013©BEIESP

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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: The increasing demand for wireless communication introduces efficient spectrum utilization challenge. To address this challenge, cognitive radio has emerged as the key technology, which enables opportunistic access to the spectrum. The main potential advantages introduced by cognitive radio are improving spectrum utilization and increasing communication quality. These appealing features match the unique requirements and challenges of resource-constrained multi-hop wireless sensor networks (WSN). Furthermore, dynamic spectrum access stands as very promising and spectrum-efficient communication paradigm for WSN due to its event-driven communication nature, which generally yields bursty traffic depending on the event characteristics. In addition, opportunistic spectrum access may also help eliminate collision and excessive contention delay incurred by dense deployment of sensor nodes. Clearly, it is conceivable to adopt cognitive radio capability in sensor networks, which, in turn yields a new sensor networking paradigm, i.e.cognitive radio sensor networks (CRSN). In this paper, the main design principles, potential advantages and application areas and network architectures of CRSN are introduced. The existing sensing methods adopted in WSN are discussed along with the open research avenues for the realization of CRSN.
Keywords: Cognitive radio, sensor networks, opportunistic spectrum access, efficient spectrum sensing.