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Intelligent spectrum mobility and resource management in cognitive radio ad hoc networks
Wang, Dan
Wang, Dan
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Dissertation
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2017-05
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Abstract
To alleviate the spectrum scarcity problem, the FCC has been suggested a brand new paradigm for dynamically accessing the allocated spectrum. Cognitive radio (CR)
technology has emerged as a promising solution to realize dynamic spectrum access
(DSA). With the capability of sensing the frequency bands in a time and locationvarying
spectrum environment and adjusting the operating parameters based on the
sensing outcome, CR technology allows an unlicensed user to exploit the licensed
channels which are not used by licensed users in an opportunistic manner.
In this research, an intelligent spectrum mobility and resource management frame-work
in CR ad hoc networks is explored. In particular, five spectrum mobility and resource
management issues in CR ad hoc networks are investigated: 1) global time synchronization
in CR ad hoc networks; 2) spectrum sensing scheduling scheme to dif-ferentiate the signals
from primary users (PUs) and secondary users (SUs); 3) power control scheme for
concurrent transmissions of location-aware mobile cognitive radio ad hoc networks; 4)
jointly power adaptation and spectrum handoff scheme in mobile cognitive radio networks;
and 5) end-to-end congestion control scheme in multi-hop cognitive radio ad hoc networks.
The contributions of the research include: 1) fundamentally solving the global time
synchronization problem for the CR ad hoc network in a time and location-varying
spectrum environment. 2) Joint power control, frequency selection, and spectrum handoff
is proposed in mobile CR ad hoc network. 3) Upper layer spectrum sensing scheme can
differentiate the signals from PUs and SUs. 4) The proposed end-to-end congestion control
protocol can significantly enhance the transport layer of the CR ad hoc networks. To the
best of our knowledge, this is the first work that comprehensively investigate the spectrum
mobility and resource management issues from the physical layer to the transport layer in
mobile CR ad hoc networks.
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Thesis (Ph.D.)-- Wichita State University, College of Engineering, Dept. of Electrical Engineering and Computer Science
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Wichita State University
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Copyright 2017 by Dan Wang
All Rights Reserved