Error Control in Wireless Sensor Networks: A Process Control Perspective
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
The use of wireless technology in the process industry is becoming increasingly important to obtain fast deployment at low cost. However, poor channel quality often leads to retransmissions, which are governed by Automatic Repeat Request (ARQ) schemes. While ARQ is a simple and useful tool to alleviate packet errors, it has considerable disadvantages: retransmissions lead to an increase in energy expenditure and latency. The use of Forward Error Correction (FEC) however offers several advantages. We consider a Hybrid-ARQ-Adaptive-FEC scheme (HAF) based on BCH codes and Channel State Information. This scheme is evaluated on AWGN and fading channels. It is shown that HAF offers significantly improved performance both in terms of energy efficiency and latency, as compared to ARQ.
Place, publisher, year, edition, pages
2011. , 32 p.
UPTEC F, ISSN 1401-5757 ; 11030
wireless sensor networks, process control, hybrid ARQ, forward error correction, FEC, HARQ, adaptive FEC
Signal Processing Communication Systems
IdentifiersURN: urn:nbn:se:uu:diva-160784OAI: oai:DiVA.org:uu-160784DiVA: diva2:452988
Master Programme in Engineering Physics
Björnemo, Erik, Ph.D.
Ahlén, Anders, ProfessorNyberg, Tomas