MEASUREMENT AND ANALYSIS ON ROUTING PERFORMANCE IN LARGE-SCALE WIRELESS SENSOR NETWORKS

The Hong Kong University of Science and Technology
Department of Computer Science and Engineering


PhD Thesis Defence


Title: "MEASUREMENT AND ANALYSIS ON ROUTING PERFORMANCE IN
LARGE-SCALE WIRELESS SENSOR NETWORKS"

By

Mr. Tong ZHU


Abstract

Wireless sensor networks (WSNs) are developed in an accelerated pace during the 
last few years. A lot of projects have been launched for various applications, 
however, none of those projects realize long-term operations and large-scale 
deployments. Motivated by the need of revealing the difficulties of large-scale 
long-term WSNs, we launched two long-term large-scale WSNs: "GreenOrbs" in 2009 
and "CitySee" in 2011, which work for closely monitoring the forest and urban 
environments and accurately measuring carbon sequestration and emission, 
respectively. Through long-term measurements and statistical analysis we have a 
deep understanding on data collection behaviors of large-scale WSNS, especially 
for routing performance. This thesis mainly answers questions which cover root 
causes and impact of network behaviors on routing performances, e.g., What 
causes routing dynamics? What is the impact of routing dynamics? When, where, 
and under what kind of circumstances packet losses occur? Why packets are lost? 
It also shows findings and insights on routing dynamics and packet delivery 
performances and presents a novel prediction method for traffic modeling and 
energy saving. We evaluate the performances of proposed methods by experiments 
with extensive data-trace and verifications in real deployed systems. The 
results show that our findings are insightful and the proposed method has been 
applied in our system.


Date:			Friday, 9 August 2013

Time:			10:00am - 12:00noon

Venue:			Room 3501
 			Lifts 25/26

Chairman:		Prof. Guochang Zhang (ACCT)

Committee Members:	Prof. Yunhao Liu (Supervisor)
 			Prof. Lei Chen
 			Prof. Raymond Wong
 			Prof. Ke Yi
 			Prof. Susheng Wang (ECON)
                        Prof. Jianping Wang (Comp. Sci., CityU)


**** ALL are Welcome ****