Relay and Routing Selection in Relay-Based Wireless Networks

PhD Thesis Proposal Defence


Title: "Relay and Routing Selection in Relay-Based Wireless Networks"

by

Miss Jin ZHANG


Abstract:

In recent years, there has been an upsurge of interest in relay-based wireless 
networks in both industry and academia. With the introduction of relay node, 
which can forward packet for some other nodes which require relaying 
assistance, the network performance can be dramatically improved: the coverage 
of a infrastructure network is extended; spatial diversity is exploited and 
system capacity is increased; meanwhile, the transmission reliability is 
enhanced. In relay wireless networks, in order to fully exploit the benefit of 
relay transmissions, MAC and network layer schemes need to be redesigned. In 
this thesis, we will focus on the study of relay selection problem in MAC layer 
and optimal routing decision problem in network layer. Several relay and 
routing selection schemes are proposed for different wireless applications when 
concept of relaying is applied. In relay selection part, a cooperative MAC 
protocol is designed to dynamically select relay nodes according to real-time 
channel condition and contention relationship for broadcast traffics in 
vehicular networks; in respect to the cognitive radio networks, we propose a 
incentive relay set selection scheme to stimulate secondary users act as relay 
nodes to forward packets for secondary users; then, a cooperative cognitive 
radio architecture is proposed and a real testbed is constructed to verify its 
effectiveness. In routing selection part, a cooperative routing scheme which 
considers contention relationship among links is proposed in multi-source 
multi-destination multi-hop wireless networks; and finally, a cooperative 
network coding-aware routing scheme is given to enable relaying further enhance 
the benefit of network coding in wireless networks. The above studies 
demonstrate that with suitable relay and routing schemes, relaying benefit is 
fully exploited and network performance is remarkably enhanced in relay-based 
wireless networks.


Date:     		Tuesday, 31 March 2009

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

Venue:                  Room 3494
 			lifts 25-26

Committee Members:      Dr. Qian Zhang (Supervisor)
 			Dr. Bo Li (Chairperson)
 			Dr. Lin Gu
 			Prof. Mounir Hamdi


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