Energy and QoS Aware Data Routing in Wireless Sensor Networks 

				 Mohamed Younis

	   Department of Computer Science and Electrical Engineering
		    University of Maryland Baltimore County

Networking unattended wireless sensors are expected to have significant impact
on the efficiency of many military and civil applications such as combat field
surveillance, security and disaster management. Typically sensors collect data
about their surrounding and forward that data to a gateway (sink). The gateway
can perform fusion of the sensed data in order to filter out erroneous data and
anomalies and to draw conclusions from the reported data over a period of time.
Due to the limitation of the energy supply that these miniaturized sensors
have, almost all of the proposed data routing protocols have aimed at energy
efficiency as the ultimate objective and considered relaying data to a
stationary gateway. However, many new issues have been posed by the increasing
interest in applications that demand certain quality of service (QoS)
guarantees and employ moving gateways. 

In this talk, we analyze the design issues for energy and QoS aware
communication protocols for sensor networks and describe an energy-efficient
approach for routing delay-constrained data. Three models of gateway nodes are
considered; stationary, movable and mobile. Challenges posed by gateway's
motion are enumerated and an efficient solution is discussed. In addition, we
investigate the potential for relocating the gateway for enhanced timeliness.
We describe the validation setup and report on performance results. Finally we
point out other on-going work in our lab. at UMBC and list some directions for
future research.

Biography:

Dr. Younis is currently an assistant professor in the department of computer
science and electrical engineering at the university of Maryland Baltimore
County (UMBC). Before joining UMBC, he was with the Advanced Systems Technology
Group, an Aerospace Electronic Systems R&D organization of Honeywell
International Inc. While at Honeywell he led multiple projects for building
integrated fault tolerant avionics, in which a novel architecture and an
operating system were developed. This new technology has been incorporated by
Honeywell in multiple products and has received worldwide recognition by both
the research and the engineering communities. He also participated in the
development the Redundancy Management System, which is a key component of the
Vehicle and Mission Computer for NASA's X-33 space launch vehicle. Dr. Younis'
technical interest includes network architectures and protocols, embedded
systems, fault tolerant computing and distributed real-time systems. Dr. Younis
has four granted and three pending patents. He served on multiple technical
committees and published over 50 technical papers in refereed conferences and
journals.