Multicast in Multi-rate Wireless Mesh Networks

Speaker:	Prof. Chun Tung Chou
		School of Computer Science and Engineering
		University of New South Wales, Australia

Title: 		"Multicast in Multi-rate Wireless Mesh Networks"

Date:		Friday, 3 February 2006

Time:		11:00am - 12 noon

Venue:		Room 3598 (via lift nos. 27/28)
		HKUST

Abstract:

In a multi-rate wireless network, a node can dynamically adjust its link
transmission rate by switching between different modulation schemes. For
the current IEEE802.11a/b/g standards, this rate adjustment is limited to
unicast traffic only. We consider a novel type of multi-rate mesh networks
where a node can dynamically adjust its link layer multicast rates to its
neighbours. In particular, we consider the problem of realising low
latency network-wide broadcast in this type of multi-rate wireless meshes.
We will first show that the multi-rate broadcast problem is significantly
different from the single-rate case. We will then present two algorithms
for achieving low latency broadcast in a multi-rate mesh which exploits
both wireless broadcast advantage and the multi-rate nature of the
network. The proposed algorithms allow us to study how the design of
multi-rate meshes can affect the broadcast latency. In particular, we show
the significance of the product of transmission rate and transmission
coverage area in designing multi-rate wireless mesh networks.

This is joint work with Archan Misra (IBM Watson). This project is
supported by the Australian Research Council.


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Biography:

Chun Tung Chou is a Senior Lecturer at the School of Computer Science and
Engineering, University of New South Wales, Sydney, Australia. He received
his BA in Engineering Science from University of Oxford, U.K. and his PhD
in Control Engineering from University of Cambridge, U.K.  He has
published over 80 journal and conference articles in Computer Networking
and Control Engineering. His current research interests are Wireless Mesh
Networks, Sensor Networks, Multimedia Networking and Network Optimisation.
URL: http://www.cse.unsw.edu.au/~ctchou/