Abstract
Uncertainty in dense heterogeneous IoT sensor networks can be decreased by applying reputation-inspired algorithms, such as the EWMA (Exponentially Weighted Moving Average) algorithm, which is widely used in social networks. Despite its popularity, the eventual convergence of this algorithm for the purpose of IoT networks has not been widely studied, and results of simulations are often taken in lieu of the more rigorous proof. Therefore the question remains, whether under stable conditions, in realistic situations found in IoT networks, this algorithm indeed converges. This paper demonstrates proof of the eventual convergence of the EWMA algorithm. The proof consists of two steps: it models the sensor network as the UOG (Uniform Opinion Graph) that enables the analytical approach to the problem, and then offers the mathematical proof of eventual convergence, using formalizations identified in the previous step. The paper demonstrates that the EWMA algorithm converges under all realistic conditions.
Highlights
Let us consider a dense Internet of Things network, consisting mostly of inexpensive sensors that collectively measure a certain physical phenomenon
This paper presents the analysis and the proof of eventual convergence for the EWMA algorithm, as used in IoT sensor networks
Such an algorithm can be used in over-provisioned (“dense”) sensor networks to decrease the uncertainty of measurements reported by the networks, even if low-cost sensors are used, and no reference nodes are present
Summary
Let us consider a dense Internet of Things network, consisting mostly of inexpensive sensors that collectively measure a certain physical phenomenon. Note that the notion of quality applies well to nodes that provide incorrect readings due to the use of low-quality sensors and nodes that provide such readings due to their failure or the failure of their communication links. This makes this approach potentially attractive to IoT networks that use wireless communication. The key contribution of this paper is proof of the eventual convergence of the EWMA algorithm, as applied to IoT sensor networks.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
