Spread Spectrum Visual Sensor Network Resource Management Using an End-to-End Cross-Layer Design

—In this paper, we propose an approach to manage network resources for a direct sequence code division multiple access (DS-CDMA) visual sensor network where nodes monitor scenes with varying levels of motion. It uses cross-layer optimization across the physical layer, the link layer, and the application layer. Our technique simultaneously assigns a source coding rate, a channel coding rate, and a power level to all nodes in the network based on one of two criteria that maximize the quality of video of the entire network as a whole, subject to a constraint on the total chip rate. One criterion results in the minimal average end-to-end distortion amongst all nodes, while the other criterion minimizes the maximum distortion of the network. Our experimental results demonstrate the effectiveness of the cross-layer optimization.

• Type: Journal
• Year: 2011
• Where: TMM
• Authors: Elizabeth S. Bentley, Lisimachos P. Kondi, John D. Matyjas, Michael J. Medley, B. W. Suter
• Keywords: Code Division Multiple Access, Cross-layer Optimization, TMM 2011, Visual Sensor Network