Optimally Mapping an Iterative Channel Decoding Algorithm to a Wireless Sensor Network

–Retransmission based schemes are not suitable for energy constrained wireless sensor networks. Hence, there is an interest in including parity bits in each packet for error control. From an information-theoretic perspective the most efficient usage of network capacity can be achieved by performing full encoding/decoding at each node and using a variable rate in accordance with the link-quality. However, such an approach represents a major burden on powerconstrained sensors. In this paper, we propose a more practical approach that is based on optimally distributing iterative channel decoding over sensor networks. In such a paradigm, the guarantee with which the base station, or collector, gets the data from a sensor is a function of the processing within the intermediate nodes between source and destination (in-network processing). There are two extreme cases: a) Complete channel decoding at each hop and b) decoding only at the final destination. In this paper, we present a novel sch...

• Type: Conference
• Year: 2007
• Where: ICC
• Authors: Saad B. Qaisar, Shirish S. Karande, Kiran Misra, Hayder Radha
• Keywords: Communications, ICC 2007, Intermediate Nodes, Sensor Networks, Wireless Sensor Networks