NetCoDer: A Retransmission Mechanism for WSNs Based on Cooperative Relays and Network Coding.
Some of the most difficult problems to deal with when using Wireless Sensor Networks (WSNs) are related to the unreliable nature of communication channels. In this context, the use of cooperative diversity techniques and the application of network coding concepts may be promising solutions to improve the communication reliability. In this paper, we propose the NetCoDer scheme to address this problem. Its design is based on merging cooperative diversity techniques and network coding concepts. We evaluate the effectiveness of the NetCoDer scheme through both an experimental setup with real WSN nodes and a simulation assessment, comparing NetCoDer performance against state-of-the-art TDMA-based (Time Division Multiple Access) retransmission techniques: BlockACK, Master/Slave and Redundant TDMA. The obtained results highlight that the proposed NetCoDer scheme clearly improves the network performance when compared with other retransmission techniques.
IFSC-Federal Institute of Santa Catarina, S&#227;o Jos&#233; 88130-310, Brazil. odilson@ifsc.edu.br.
Odilson T
OT
Valle
Department of Automation and System, UFSC-Federal University of Santa Catarina, Florian&#243;polis 88040-900, Brazil. carlos.montez@ufsc.br.
Carlos
C
Montez
Department of Computing, UFSC-Federal University of Santa Catarina, Ararangu&#225; 88905-120, Brazil. gustavo.araujo@ufsc.br.
Gustavo
G
Medeiros de Araujo
INEGI-Faculty of Engineering of University of Porto, Porto 4200-465, Portugal. vasques@fe.up.pt.
Francisco
F
Vasques
Department of Computing, UFSC-Federal University of Santa Catarina, Ararangu&#225; 88905-120, Brazil. ricardo.moraes@ufsc.br.
Ricardo
R
Moraes
cooperative communication; linear network coding; network coding; reliability; retransmission techniques; wireless sensor networks