Issue No. 01 - Jan.-March (2017 vol. 4)
Daniel Ratton Figueiredo , Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Michele Garetto , University of Torino, Torino, Italy
The co-evolution between network structure and functional performance is a fundamental and challenging problem whose complexity emerges from the intrinsic interdependent nature of structure and function. Within this context, we investigate the interplay between the efficiency of network navigation (i.e., path lengths) and network structure (i.e., edge weights). We propose a simple and tractable model based on iterative biased random walks where edge weights increase over time as function of the traversed path length. Under mild assumptions, we prove that biased random walks will eventually only traverse shortest paths in their journey towards the destination. We further characterize the transient regime proving that the probability to traverse non-shortest paths decays according to a power-law. We also highlight various properties in this dynamic, such as the trade-off between exploration and convergence, and preservation of initial network plasticity. We believe the proposed model and results can be of interest to various domains where biased random walks and de-centralized navigation have been applied.
Navigation, Convergence, Network topology, Space exploration, Transient analysis, Analytical models, Cost accounting,emergent behavior, Network co-evolution, random walk, navigation
Daniel Ratton Figueiredo, Michele Garetto, "On the Emergence of Shortest Paths by Reinforced Random Walks", IEEE Transactions on Network Science and Engineering, vol. 4, no. , pp. 55-69, Jan.-March 2017, doi:10.1109/TNSE.2016.2618063