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Soft real-time traffic communication in loaded wireless mesh networks

Authors:

Jesus Aisa , Hossein Fotouhi, José Luis Villarroel , Luis Almeida

Research group:

Data Communication

Publication Type:

Conference/Workshop Paper

Venue:

12th IEEE World Conference on Factory Communication Systems

Abstract

Industrial applications have been shifting towards wireless multi-hop networks in recent years due to their lower cost of deployment and reconfiguration compared with their wired counterparts. These wireless networks usually must sup- port real-time communication to meet the application requirements. For this reason, Wireless Mesh Networks (WMNs) are potential candidates for industrial applications as they support a fixed infrastructure of static nodes for relaying packets. To meet the application demands, we modify the wireless chain network protocol (WICKPro) to support soft real-time traffic in WMNs with chain topologies over IEEE 802.11. We employ tele-operation of mobile robots as our case study, and perform extensive simulation and laboratory experiments. We show that the data delivery ratio is increased up to 42% in a scenario with 7 nodes, when the maximum end-to-end delay tolerated by the application is doubled. This is particularly suited to soft real-time applications that can trade longer delays by higher reliability. Moreover, when compared with a distributed priority- based token-passing protocol (RT-WMP), the lower overhead of WICKPro allows, in an error-free scenario, obtaining a throughput improvement of 33.42% on average.

Bibtex

@inproceedings{Aisa4311,
author = {Jesus Aisa and Hossein Fotouhi and Jos{\'e} Luis Villarroel and Luis Almeida},
title = {Soft real-time traffic communication in loaded wireless mesh networks},
month = {May},
year = {2016},
booktitle = {12th IEEE World Conference on Factory Communication Systems},
url = {http://www.es.mdu.se/publications/4311-}
}