Energy Efficient Bandwidth Management in Wireless Sensor Network

ABSTRACT

Wireless Sensor Network (WSNs) are application specific and has group of self-organized, resource constrained nodes with different processing, communication and storage capabilities. The transmission of real-time traffic over such network requires both energy and bandwidth which are scarce. The bandwidth and energy constraint of the node has a direct impact on QoS and efficiency of WSNs. Also, the bandwidth utilization is affected by the performance metrics used by the physical, data link and network layers of WSN protocol stack. Therefore, a need arises to develop a cross-layer abstraction for improving the network performance with metrics as energy consumption, network lifetime, delay, throughput, bandwidth utilization, and computational overheads in WSNs. The principle contribution of the work is focused on data aggregation, scheduling, and synchronization mechanisms for effective utilization of bandwidth in cluster-based static, mobile and heterogeneous WSNs. The data aggregation algorithms helps to reduce the redundant data by use of perfectly compressible aggregation functions reducing the energy consumption, communication cost with reduced throughputs. The scheduling algorithm using TDMA as MAC allocates the conflict-free slot for reducing collisions, energy consumption and delay with increased throughput. The proposed synchronization algorithms use spanning tree mechanism for balancing clock of nodes and network. The level-by-level synchronization helps to reduce errors, energy consumption and delay with increased throughput. Throughput is the measure of effective bandwidth utilization in resource constrained WSN.

Assessment Committee
Professor K.C. Chen, Professor, University of South Florida, USA
Professor K.P. Subbalakshmi, Stevens Institute of Technology, USA
Professor Reza Tadayoni (chairman), Aalborg University, Copenhegan, Denmark

Supervisors
Professor Ramjee Prasad, Aarhus University, Denmark
Professor Neeli Rashmi Prasad, Aalborg University, Denmark
Professor Shingo Ohmori, CTIF, Japan
Moderator
Professor Peter Koch, Aalborg University, Denmark