Mitigating multi-path fading in a mobile mesh network

Authors: Marcos A.M. Vieira, Matthew E. Taylor, Prateek Tandon, Manish Jain, Ramesh Govindan, Gaurav S. Sukhatme, Milind Tambe

Abstract: 
By using robots as routers, a team of networked robots can provide a communication substrate to establish a wireless mesh network. The mobile mesh network can autonomously optimize its configuration, increasing performance. One of the main sources of radio signal fading in such a network is multi-path propagation, which can be mitigated by moving the senders or the receivers on the distance of the order of a wavelength. In this paper, we measure the performance gain when robots are allowed to make such small movements and find that it may be as much as 270%. Our main contribution is the design of a system that allows robots to cooperate and improve the real-world network throughput via a practical solution. We model the problem of which robots to move as a distributed constraint optimization problem (DCOP). Our study includes four local metrics to estimate global throughput.

Keywords:
Mobile and wireless ad-hoc networks
Multi-path fading
Complex environments
Distributed optimization
Experimental and prototype results

Published in: Ad Hoc Networks (Volume 11, Issue 4, January 2013)

Publisher: Elsevier

ISSN Information: 1570-8705

Mitigating multi-path fading in a mobile mesh network

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