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Sponsor: National Science Foundation (NSF)
Duration: January 2010 - December 2014
Investigator: Dr. Jiang (Linda) Xie (PI)
Students: Yi Song, Ji Li
 Overview:
The cognitive radio technology is a promising technology to overcome the imbalance between the increase in the spectrum access demand
and the inefficiency in the spectrum usage by allowing dynamic spectrum access. Seamless mobility is considered as a critical component
to ensure the success of cognitive radio network (CRN) deployment, but unfortunately, is under-explored in the literature.
The research objective of this project is to develop new policies and algorithms for providing seamless mobility support
in cognitive radio wireless networks (CRNs). The approach involves identifying the new issues in the mobility support caused by
the changing spectrum environment in CRNs, exploiting the varying spectrum opportunities in time and space domains,
proactively utilizing the spectrum opportunities for mobility preparations,
and optimizing the performance via spectrum-adaptive mobility management schemes.
Research Activities and Key Outcomes:
This project focuses on designing new policies and algorithms that support seamless spectrum mobility
and node mobility in a dynamic spectrum environment. It has the following main research components:
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Proactive mobility preparations including (1) distributed spectrum handoff and channel selection algorithms
and protocols exploring the time-domain spectrum opportunities and (2) optimal power control protocols exploring the space-domain spectrum opportunities;
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Spectrum-aware mobility optimization including (1) spectrum-aware control information dissemination algorithms
and (2) Quality-of-Service based networking protocols for seamless mobility support.
Publications:
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Yi Song and Jiang Xie, "ProSpect: A Proactive Spectrum Handoff Framework for Cognitive Radio Ad Hoc Networks without Common Control Channel,"
IEEE Transactions on Mobile Computing, vol. 11, no.
7, pp. 1127-1139, July 2012.
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Ji Li and Jiang Xie,
"A Power Control Protocol to Maximize the Number of Common Available Channels Between Two Secondary Users in Cognitive Radio Networks," Proc. IEEE
Global Communications Conference (GLOBECOM 2013), pp.
4538-4543, December
2013.
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Yi Song and Jiang Xie,
"End-to-End Congestion Control in Multi-hop Cognitive Radio Ad Hoc Networks: To Timeout or Not To Timeout?" Proc. IEEE
Global Communications Conference (GLOBECOM 2013), pp.
4464-4469, December
2013.
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Yi Song and Jiang Xie,
"Finding Out the Liars: Fighting Against False Channel Information Exchange Attacks in Cognitive Radio Ad Hoc Networks," Proc. IEEE
Global Communications Conference (GLOBECOM 2012), pp. 2095-2100, December
2012.
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Yi Song and Jiang Xie,
"Performance Analysis of Spectrum Handoff for Cognitive Radio Ad Hoc Networks without Common Control Channel under Homogeneous Primary Traffic,"
Proc. IEEE INFOCOM 2011, pp. 3011-3019, April 2011.
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Yi Song and Jiang Xie,
"Common Hopping Based Proactive Spectrum Handoff in Cognitive Radio Ad Hoc Networks,"
Proc. IEEE Global Communications Conference (GLOBECOM 2010), pp. 1-5, December 2010.
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Yi Song and Jiang Xie,
"Proactive Spectrum Handoff in Cognitive Radio Ad Hoc Networks based on Common Hopping Coordination,"
Proc. IEEE INFOCOM 2010 Student Workshop, pp. 1-2, March 2010.
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Yi Song and Jiang Xie,
"Optimal Power Control for Concurrent Transmissions of Location-aware Mobile Cognitive Radio Ad Hoc Networks,"
Proc. IEEE Global Communications Conference (GLOBECOM 2009), pp. 1-6, December 2009.
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Yi Song and Jiang Xie,
"On the Spectrum Handoff for Cognitive Radio Ad Hoc Networks without Common Control Channel,"
Book Chapter of Cognitive Radio Mobile Ad Hoc Networks, F. Richard Yu, Eds. Springer, July 2011.
Broader Impact:
This project will have a significant impact on wireless networking research
in the area of CRNs. With the active involvement of industrial companies and standard working
groups on cognitive radio products and DSA regulatory policies, seamless mobility is considered
as a critical component to ensure the success of CRN deployment, but unfortunately, it is inadequately
addressed in current research and development. The research effort will provide innovative mobility
support techniques to numerous applications of the CRN technology, e.g., public safety networks,
emergency networks, health monitoring, home networking, and cognitive mesh networks. It will
also have significant impacts on research in emerging technologies with high mobility scenarios, such as
vehicular networks, and opportunistic interconnections of heterogeneous wireless networks.
Education Activities:
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Curriculum Development: graduate-level courses Fundamentals of Wireless Systems and Protocols and Modeling and Performance Analysis of Communication Networks
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Graduate Student Mentoring: Yi Song,
"Distributed Intelligent Spectrum Management in Cognitive Radio Ad Hoc Networks,"
PhD Dissertation, June 2013.
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