Abstract
This paper addresses the use of network coding algorithms combined with adequate retransmission techniques to improve the communication reliability of Wireless Sensor Networks (WSN). Basically, we assess the recently proposed Optimized Relay Selection Technique (ORST) operating together with four different retransmission techniques, three of them applying network coding algorithms. The target of this assessment is to analyze the impact upon the communication reliability from each of the proposed retransmission techniques for WSN applications. In addition, this paper presents an extensive state-of-the-art study in what concerns the use of network coding techniques in the WSN context. The initial assumption of this research work was that the ORST operating together network coding would improve the communication reliability of WNS. However, the simulation assessment highlighted that, when using the ORST technique, retransmission without network coding is the better solution.
Highlights
The concept of industry 4.0 refers to the evolution of production systems through the integration of industrial automation and information technologies
It is possible to observe that a number of works use random linear network coding (RLNC), which can be due to its following advantages: First, the linear system-generated has a high probability of being solvable, if all the coefficients of all the encoding vectors were randomly selected, independently, and uniformly from the finite field Fq, considering that the finite field size is sufficiently large relative to the size of the network [33]
LLDN model, including the collision free period (CFP), which is subdivided into guaranteed time slots (GTS) for uplink messages forwarded from the nodes to the coordinator; and the group acknowledgment (GACK) timeslot
Summary
The concept of industry 4.0 refers to the evolution of production systems through the integration of industrial automation and information technologies. Network coding techniques allow relay nodes to process inputs from independent data streams, that is, to send data packets that are linear combinations of previously received packets from different sources [18]. Random and Sparse Linear Network Coding will be used as a retransmission mechanism, considering a scheme that allows the relay nodes and the coordinating node to combine a priori which coefficients will be used. In this way, the NC technique would be able to improve the retransmission reliability and reduce the overhead generated when sending the coding coefficients.
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