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Low Power Channel Coding for Wireless Sensor Networks Host Publication: 17th Annual Symposium on Communications and Vehicular Technology in the Benelux Authors: N. Abughalieh, K. Steenhaut and A. Nowé Publisher: IEEE Publication Date: Nov. 2010 Number of Pages: 5 ISBN: 978-1-4244-8487-4
Abstract: Wireless Sensor Networks (WSNs) consist of a set
of small devices with limited energy resources, reduced processing
capabilities and a radio frequency communication unit
with limited transmission power. Transmission over the wireless
channels is prone to noise and interference which causes the
reception of erroneous packets at the receiving node. Automatic
Repeat Request (ARQ) techniques are usually used in WSNs to
tackle erroneous transmission, but they become inefficient (with
respect to energy and delay) in harsh environments. To reduce the
number of retransmission for lossy channels, Error Correcting
Codes (ECC) are commonly used. The use of ECC comes with
increased processor power and delay at the sensor nodes for
encoding and decoding the packets. In this work we present an
ECC technique for sensor networks based on Turbo Codes. A low
complexity turbo encoder is deployed at the source nodes, while
the iterative decoding process is shifted to the Base Station. The
forwarding nodes contribute by executing error monitoring and
correcting. This approach enhances the reliability of the network
communications, while being energy- and delay efficient External Link.
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