Dynamic Spectrum Access in Cognitive Radio Wireless Sensor Networks Using Different Spectrum Sensing Techniques
نویسنده
چکیده
Cognitive Radio Wireless Sensor Networks are emerging technology which provides cognitive capabilities to Wireless Sensor Networks. WSN operates in unlicensed band. Same spectrum band is shared by other wireless devices like Wi-Fi and Bluetooth. Due to this, the unlicensed spectrum is overcrowded which degrades the performance of WSNs. To overcome this issue, Cognitive Radio is integrated with WSNs. Spectrum sensing techniques plays important role in Cognitive Sensor Networks. Cognitive radio has ability to know the unutilized spectrum in license and unlicensed band by spectrum sensing. With the help of cognitive radio, idle spectrum band is identified and allocated to sensor nodes. This approach reduces the interference and collisions in WSN which in turn avoids packet retransmissions ensure fair energy in WSN. This paper discuss about the Cognition in WSN and Cognitive Radio WSN’s Architecture. Also, Reviews of different Spectrum Sensing techniques are explored for dynamic spectrum access. The pros and cons of each spectrum sensing techniques are discussed.
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