Seminar by Dr. Nilanjan Banerjee
Mobility and Resource Adaptive Architecture and Protocols for Multimedia Applications in Ubiquitous Computing
Dr. Nilanjan Banerjee
University of Texas at Arlington
Texas, USA
Date: Tue, Nov 02, 2004
Time: 3:45 PM
Venue: CS-101
Abstract
Ubiquitous computing is the notion of building an invisible computing environment, by providing the users a wide variety and large number of wireless enabled devices to interact with an activated world. Spectacular advancements in such technologies as wireless communications, sensors and portable devices are the driving forces in the realization of such environments. However, supporting mobile multimedia applications in ubiquitous computing environments still remains a challenging issue. Apart from the problems arising out of dynamic and resource constrained wireless networks and/or devices, heterogeneity due to different prevailing wireless technologies proved to be a major barrier. In this dissertation, we propose an adaptive architecture which addresses the heterogeneity issues along the two dimensions of ubiquitous computing, \emph{viz.} mobile computing and pervasive computing. The proposed architecture uses open IP-based standardized protocols to facilitate the notion of IP convergence and adapts to the changes in access network technology and the available resources by means of its mobility management and resource management frameworks. An application layer mobility management framework based on the Session Initiation Protocol (SIP) is proposed for supporting mobility across heterogeneous wireless access networks. This framework is enhanced by a soft handoff based mechanism to ensure smooth multimedia streaming. The SIP session setup and mobility support are extended to infrastructure-less ad hoc networks with a basic broadcast based search technique and integrated with a cluster-based routing protocol that we propose. Finally, a novel control theory based cross-layer flow and rate control protocol is proposed for adaptive streaming multimedia applications. Theoretical foundations for a pro-active, network resource-aware middleware assisting the control protocols of the adaptive applications, is built as a part of the resource management framework of the proposed architecture. The control protocols have been shown to optimize resource utilization, while providing the necessary quality of service (QoS) such as minimum delay jitter and bandwidth guarantees, to the multimedia applications.
About the Speaker
Nilanjan Banerjee is a Ph.D. candidate in the Department of Computer Science and Engineering at the University of Texas at Arlington. He received his B.E. degree in 1999 from Jadavpur University, India, and his M.S. degree in 2001 from the University of Texas at Arlington, both in computer science and engineering. His research interest includes mobile and pervasive computing, network routing protocols, system performance analysis, and optimization in dynamic systems.