ERROR CONTROL CODING IN WIRELESS SENSOR NETWORKS
Wireless Sensor Networks (WSN) have received increasing attention in the last years, resulting in numerous published works that aim at providing solutions for problems as medium access control (MAC), network topology, routing protocols, and error control strategies. In general, WSN nodes are made of battery-supplied small devices with reduced processing capability and a radio frequency transceiver unity, both operating in a collaborative way. One of the main challenges in deploying WSN is to improve the energy-efficiency and lifetime of the nodes while keeping communication reliability. Transmissions over the wireless channel may experience many impairments, like random noise and fading, increasing the bit error rate at reception, causing several retransmissions, and consuming the extra energy from the node. In order to minimize the harmful effects of the radio channel, error control strategies using packet retransmission and error-correcting codes are commonly utilized. In this Matlab design the trade-off between transmission and processing energy consumption in a sensor node employing convolutional codes. Through this simulation results in it possible to identify and select the appropriate complexity of the error control code to be used in each sensor node, in order to maximize the network lifetime.
Reference Paper: Error Control Coding in Wireless Sensor Networks
Author’s Name: Marcelo Eduardo Pellenz, Richard Demo Souza and Mauro Sergio Pereira Fonseca
Year:2009
Source: Springer
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