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Adopting FEC and Packet Combining to Increase the Performance of IWSNs Using Relaying
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.ORCID iD: 0000-0001-9589-6986
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.ORCID iD: 0000-0001-6497-4099
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems. (IS (Embedded Systems))ORCID iD: 0000-0002-2419-2735
2016 (English)In: International Conference on Computing and Network Communications CoCoNet'15, 2016, 90-97 p.Conference paper, Published paper (Refereed)
Abstract [en]

Industrial networks can benefit significantly from introduction of wireless communication. However, wireless systems suffer from much higher packet error rates than wired networks do, making it difficult to obtain sufficient reliability within application deadlines. One promising approach to increase the reliability of wireless communication systems without causing excessive additional delays is to exploit spatial diversity. However, often in industrial networks it is not possible to place the relay nodes optimally. Due to this not even relay nodes located close to the source are able to receive the source packets missing at the destination correctly and consequently they cannot assist by relaying. Therefore, to benefit even further from relaying, additional measures should be taken both to increase the number of the correct packets at the relay nodes and to allow the destination to recover more correct packets. Consequently, the focus of this work is schemes enabling relaying, forward-error-correction (FEC) and packet combining without causing additional delays or complexity such that it is possible to use off the shelf transceivers. The results show that the introduction of FEC and packet combining does improve performance by enabling relay nodes to help more often. However, the exact gain depends on the specific FEC scheme used and, in particular, the size of the preamble and other fields that must be left uncoded, but still be received correctly, to be able to use FEC on the received packet.

Place, publisher, year, edition, pages
2016. 90-97 p.
National Category
Computer Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-29652DOI: 10.1109/CoCoNet.2015.7411172ISI: 000376085000013Scopus ID: 2-s2.0-84964902861ISBN: 978-146737309-8 (print)OAI: oai:DiVA.org:mdh-29652DiVA: diva2:876485
Conference
International Conference on Computing and Network Communications, CoCoNet 2015; Trivandrum; India; 15 December 2015 through 19 December 2015
Projects
READY - Research Environment for Advancing Low Latency InternetWIRE – Wireless Industrial networks with Reliability Enhancements
Available from: 2015-12-03 Created: 2015-11-26 Last updated: 2016-06-09Bibliographically approved
In thesis
1. Relaying for Industrial Wireless Networks
Open this publication in new window or tab >>Relaying for Industrial Wireless Networks
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The interest in wireless technology for industrial applications has increased dramatically over the last few years. Wireless communication can reduce cost and complexity, enable mobility and provide much higher flexibility than its wired counterparts. However, to be considered for use in practice, wireless systems must provide sufficient levels of timeliness and reliability as required by industrial applications, while keeping reasonable levels of complexity as well as interoperability with existing wired networks. Wireless channels, characterized by pathloss, noise, multipath fading and shadowing, imply a particular challenge to fulfill the requirements on timely and reliable communication. To this end, this thesis work proposes and evaluates a number of techniques able to increase the reliability of wireless communication systems without causing excessive or unpredictable delays. In addition, all proposed solutions are implementable on top of commercially available devices, i.e., they require no large alteration of the standard IEEE 802.15.4 and minimal changes to the current infrastructure to be compatible with existing industrial communication systems. First, the characteristics of industrial communication environments are determined. Then, suitable models to approximate them are selected, since the effectiveness of different error control schemes able to increase reliability depends on the type of wireless channel encountered. Next, different possibilities for reliability improvements in wireless industrial networks, while subject to strict timing constraints, are evaluated. Based on this, relaying that has been proven to be beneficial for traditional wireless networks is evaluated for applicability in industrial systems. Finally, several different relaying strategies that are implementable at the link layer on top of existing chipsets are developed and evaluated. Depending on the specific type of industrial application and its corresponding performance metrics, relaying is combined with network coding, forward error control codes, packet aggregation and packet combining techniques – all of which support increased reliability with maintained delay, at reasonable complexity investments. To complete the framework, scheduling schemes tailored to various relaying protocols are also developed.

Place, publisher, year, edition, pages
Västerås: Mälardalen University, 2016
Series
Mälardalen University Press Dissertations, ISSN 1651-4238 ; 197
National Category
Other Computer and Information Science
Research subject
Computer Science
Identifiers
urn:nbn:se:mdh:diva-29859 (URN)978-91-7485-247-9 (ISBN)
Public defence
2016-02-08, Zeta, Mälardalens högskola, Västerås, 13:15 (English)
Opponent
Available from: 2015-12-08 Created: 2015-12-08 Last updated: 2016-01-07Bibliographically approved

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