Data Dissemination in Vehicular Ad Hoc Networks

Speaker:	Professor Guohong CAO
		Pennsylvania State University

Title:		"Data Dissemination in Vehicular Ad Hoc Networks"

Date:		Wednesday, 4 June 2008

Time:		2:00pm - 3:00pm

Venue:		Lecture Theatre H
		(Chen Kuan Cheng Forum, near lift nos. 27/28)
		HKUST
Abstract:

Vehicular ad hoc networks (VANET) have been envisioned to be useful in
road safety and many commercial applications. Although VANET is a kind of
mobile ad hoc network, many unique characteristics of VANET bring out new
research challenges. For example, due to fast vehicle movement, the link
topology changes rapidly. As a result, many well studied structures for
efficient data dissemination such as tree, cluster and grid, are extremely
hard to be set up and maintained. Also, the network density is highly
dynamic. The traffic density is low in rural areas and during night, which
may result in frequent disconnections and network partitions. Thus, data
dissemination techniques should address these unique characteristics of
VANET. In this talk, I will present our solutions for data dissemination
in VANETs. For infrastructureless data dissemination, we design and
evaluate vehicle-assisted data delivery protocols for sparsely connected
VANET. Different from existing works, we make use of the predictable
mobility in VANET, which is limited by the traffic pattern and the road
layout. For infrastructure-assisted data dissemination, we design and
evaluate service scheduling protocols, and protocols to efficiently
utilization the bandwidth. We also propose a data pouring scheme to push
data to the users to reduce the query delay.

*******************
Biography:

Guohong CAO received his BS degree from Xian Jiaotong University, Xian,
China. He received the MS degree and PhD degree in computer science from
the Ohio State University in 1997 and 1999 respectively. Since then, he
has been with the Department of Computer Science and Engineering at the
Pennsylvania State University, where he will be a Full Professor in July.
His research interests are wireless networks and mobile computing. He has
published over one hundred papers in the areas of sensor networks,
wireless network security, data dissemination, resource management, and
distributed fault-tolerant computing. He has served on the editorial board
of the IEEE Transactions on Mobile Computing and IEEE Transactions on
Wireless Communications, and has served on the program committee of many
conferences. He was a recipient of the NSF CAREER award in 2001.