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Broadcast Design in Cognitive Radio Ad Hoc NetworksIntroduction

Broadcast Design in Cognitive Radio Ad Hoc Networks: Introduction [The invention of portable hand-held devices, such as smartphones and tablet personal computers (PCs), has led a dramatic increase in the demand of ubiquitous wireless communication networks and has revolutionized the way people communicate these days. Ranging from old-fashioned cellular networks (e.g., 4G networks) to recent local area networks (e.g., WiFi networks) or body area networks (e.g., Bluetooth), various types of wireless network services are seeing an unprecedented growth. With such rapid growth of wireless devices, the demands for the radio spectrum are constantly increasing, resulting in scarce spectrum resources. According to the Federal Communications Commission (FCC), almost all the radio spectrum for wireless communications has already been allocated. However, recent studies show that up to 85% of the allocated spectrum is underutilized due to the current fixed spectrum access policy [1]. To alleviate the spectrum scarcity problem, FCC has suggested a new paradigm for dynamically accessing the vacant portions of the allocated spectrum [2]. Cognitive radio (CR) has recently emerged as a promising technology to overcome the imbalance between the increase in spectrum access demand and the inefficiency in spectrum usage by allowing dynamic spectrum access (DSA). A “cognitive radio” is a radio that can change its communication protocol parameters (e.g., operating frequency) based on interactions with the environment in which it operates [2-4]. CR networks are regarded as the next-generation wireless networks to efficiently utilize the radio spectrum.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Broadcast Design in Cognitive Radio Ad Hoc NetworksIntroduction

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Publisher
Springer International Publishing
Copyright
© The Author(s) 2014
ISBN
978-3-319-12621-0
Pages
1 –11
DOI
10.1007/978-3-319-12622-7_1
Publisher site
See Chapter on Publisher Site

Abstract

[The invention of portable hand-held devices, such as smartphones and tablet personal computers (PCs), has led a dramatic increase in the demand of ubiquitous wireless communication networks and has revolutionized the way people communicate these days. Ranging from old-fashioned cellular networks (e.g., 4G networks) to recent local area networks (e.g., WiFi networks) or body area networks (e.g., Bluetooth), various types of wireless network services are seeing an unprecedented growth. With such rapid growth of wireless devices, the demands for the radio spectrum are constantly increasing, resulting in scarce spectrum resources. According to the Federal Communications Commission (FCC), almost all the radio spectrum for wireless communications has already been allocated. However, recent studies show that up to 85% of the allocated spectrum is underutilized due to the current fixed spectrum access policy [1]. To alleviate the spectrum scarcity problem, FCC has suggested a new paradigm for dynamically accessing the vacant portions of the allocated spectrum [2]. Cognitive radio (CR) has recently emerged as a promising technology to overcome the imbalance between the increase in spectrum access demand and the inefficiency in spectrum usage by allowing dynamic spectrum access (DSA). A “cognitive radio” is a radio that can change its communication protocol parameters (e.g., operating frequency) based on interactions with the environment in which it operates [2-4]. CR networks are regarded as the next-generation wireless networks to efficiently utilize the radio spectrum.]

Published: Dec 5, 2014

Keywords: Cognitive Radio (CR); CR Networks; Tablet Personal Computer; Broadcast Collision; Traditional MANETs

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