Colloquia, Seminars and Conference News
Title : Cooperative Connectivity in Wireless Ad Hoc Networks
Date : April 25, 2008. (2:00 pm) Tea starts half an hour before each seminar
Location: ITEB 336
Speaker : Prof. Benyuan Liu
Abstract:
Wireless ad hoc networks have become a critical technology that enables nodes to communicate with each other in environments where there is no network infrastructure. Previous research and deployment of wireless ad hoc networks have focused almost entirely on non-cooperative schemes where each node transmits, relays, and receives packets on an individual basis.
However, current technologies and network designs do not provide satisfactory performance in terms of throughput (or capacity), network connectivity, packet delay, etc. Recently, several cooperation schemes have been proposed to improve the performance of wireless networks, for example, cooperative diversity and network coding. In this talk we examine the network connectivity under cooperative communications where multiple nodes intentionally transmit concurrently in the same channel at the physical layer. I will first introduce the concept of cooperative communications, and the previous result of network connectivity under non-cooperative communication scheme. I will then establish the benefits of cooperative communications to connectivity for the case of infiniteone- and two-dimensional networks.
This is a joint work with Dennis Goeckel, Don Towsley, Liaoruo Wang, and Cedric Westphal.
Bio: Dr. Benyuan Liu is an Assistant Professor in the Department of Computer Science at the University of Massachusetts Lowell. He received his B.S. degree in physics from the University of Science and Technology of China (USTC), M.S. degree in physics from Yale University, and Ph.D. degree in computer science from the University of Massachusetts at Amherst. His recent research has focused on the design and performance modeling of large-scale wireless ad hoc and sensor networks.
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