Cognitive Radio Networks for Dynamic Spectrum Management

PhD Thesis Proposal Defence


Title: "Cognitive Radio Networks for Dynamic Spectrum Management"

by

Mr. Juncheng Jia


Abstract:

A fundamental evolution is witnessed in recent research and development of 
wireless communications: much effort is put on shifting from the current static 
spectrum management to a dynamic one, since the wireless industry is hindered 
by spectrum scarcity while most of allocated spectrum stays idle. To realize 
the paradigm of dynamic spectrum management, cognitive radio network is a 
promising way. In this proposal, we present our current research status on 
dynamic spectrum management and cognitive radio networking, under a unified 
framework including both economic and technological aspects. We first 
investigate the economical feasibility of dynamic spectrum management in the 
form of dynamic spectrum market. Market mechanisms are proposed to stimulate 
primary (licensed) users to open up their under-utilized spectrum bands for 
secondary (unlicensed) users. We further analyze the competitive behavior of 
the major players in wireless industry, wireless service providers, in such a 
spectrum market. Then we switch to the technical realization part. We address 
several unique issues within cognitive radio networking. One is about the 
spectrum sensing strategy of secondary nodes. A MAC protocol is proposed to 
conduct efficient spectrum sensing and access in ad hoc cognitive networks, 
taking the hardware constraints into consideration. Another is about spectrum 
heterogeneity. We propose a cooperative relaying scheme and prove the 
effectiveness with a real testbed. Several ongoing and future works include: 
resource exchange for primary and secondary users; secondary network adaption 
protocol for time varying primary traffic; and cognitive radio enhanced 
vehicular networks.


Date:     		Wednesday, 25 March 2009

Time:                   3:00p.m.-5:00p.m.

Venue:                  Room 4483
 			lifts 25-26

Committee Members:      Dr. Qian Zhang (Supervisor)
 			Prof. Lionel Ni (Chairperson)
 			Dr. Brahim Bensaou
 			Dr. Bo Li


**** ALL are Welcome ****