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On the Role of Feedback for Industrial Networks Using Relaying and Packet Aggregation

Fulltext:


Authors:

Svetlana Girs, Andreas Willig , Elisabeth Uhlemann, Mats Björkman

Research group:

Data Communication

Publication Type:

Report - MRTC

Publisher:

Mälardalen Real-Time Research Centre, Mälardalen University

ISRN:

MDH-MRTC-281/2013-1-SE

Abstract

To be accepted for use in industrial applications, wireless technologies must offer similar performance in terms of reliability and timeliness as provided by current wired solutions. Wireless channels, introducing time-varying packet error rates, impose a significant challenge to fulfill these requirements. One way to improve reliability in industrial wireless networks is to use relaying, whereas packet aggregation is a method that can reduce delay. Hence, in this paper, we propose to use a combination of relaying and packet aggregation. Based on the type of feedback provided by the controller, the relay node can choose the most suitable way to use its allocated time slots such that more packets can reach the controller before their deadlines. The results show that allowing this kind of flexibility at the relay node results in performance improvements. The more flexibility, the greater the gain, and thus further improvements can be made by adjusting the schedule to take different types of feedback into account.

Bibtex

@techreport{Girs3242,
author = {Svetlana Girs and Andreas Willig and Elisabeth Uhlemann and Mats Bj{\"o}rkman},
title = {On the Role of Feedback for Industrial Networks Using Relaying and Packet Aggregation},
month = {October},
year = {2013},
publisher = {M{\"a}lardalen Real-Time Research Centre, M{\"a}lardalen University},
url = {http://www.es.mdu.se/publications/3242-}
}