A macro-level model for investigating the effect of directional bias on network coverage

Autor:	Smith, Graeme, Sanders, J. W., Li, Qin
Rok vydání:	2014
Předmět:	Computer Science - Distributed Parallel and Cluster Computing
Druh dokumentu:	Working Paper
Popis:	Random walks have been proposed as a simple method of efficiently searching, or disseminating information throughout, communication and sensor networks. In nature, animals (such as ants) tend to follow correlated random walks, i.e., random walks that are biased towards their current heading. In this paper, we investigate whether or not complementing random walks with directional bias can decrease the expected discovery and coverage times in networks. To do so, we develop a macro-level model of a directionally biased random walk based on Markov chains. By focussing on regular, connected networks, the model allows us to efficiently calculate expected coverage times for different network sizes and biases. Our analysis shows that directional bias can significantly reduce coverage time, but only when the bias is below a certain value which is dependent on the network size. Comment: 15 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1407.5762 Zobrazit plný text záznamu View this record from Arxiv