ABSTRACT

This chapter introduces a cross-layer design of Resource Allocation and Channel Coding to protect Distributed Source Coding (DSC) based data transmission in a wireless sensor network environment. It analyzes the DSC technique and explores the relationship between source coding rates and the source nodes correlation. The chapter focuses on resource allocation techniques and examines how two important control variables, transmission rate and retry limit, trade off packet error rate and energy-latency performance to provide unequal error protection among sensors. It then investigates the channel coding technique as a promising technique to improve the overall network reliability and robustness. The chapter also examines how to formulate a cross-layer information quality optimization problem with the energy efficiency and delay constraints, and describes how it can be simplified and solved efficiently. Channel coding gives the receiver the ability of error detection and error correction. There are two types of channel codes, block codes and convolutional codes.