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Scheduling for source relaying with packet aggregation in industrial wireless networks
Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.ORCID-id: 0000-0001-9589-6986
University of Canterbury, UK.
Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system. Halmstad University.ORCID-id: 0000-0001-6497-4099
Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.ORCID-id: 0000-0002-2419-2735
2016 (engelsk)Inngår i: IEEE Transactions on Industrial Informatics, ISSN 1551-3203, E-ISSN 1941-0050, Vol. 12, nr 5, s. 1855-1864Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The interest in wireless communication systems for industrial applications has grown significantly over the last years. More flexible, easier to install and maintain, wireless networks present a promising alternative to the currently used wired systems. However, reliability and timeliness requirements at present met by wired networks also need to be fulfilled by wireless solutions. Packet errors introduced when packets travel through wireless channels imply a significant challenge to fulfill these requirements. Relaying has been recognized to improve the reliability in industrial wireless networks without causing additional delay. Furthermore, the recent results have shown that relaying combined with packet aggregation significantly outperforms simple relaying. However, it is not always cost efficient to introduce additional relay nodes into an industrial network and hence, in this paper, we propose using a combination of relaying and packet aggregation at the source nodes. The results show that when relaying and aggregation are used at the source nodes, the transmission schedule plays a crucial role. A schedule adapting to the varying channel conditions improves performance substantially. By carefully choosing which packet to aggregate, even further improvements can be achieved.

sted, utgiver, år, opplag, sider
2016. Vol. 12, nr 5, s. 1855-1864
HSV kategori
Identifikatorer
URN: urn:nbn:se:mdh:diva-29832DOI: 10.1109/TII.2016.2535393ISI: 000389219800022Scopus ID: 2-s2.0-85012054681OAI: oai:DiVA.org:mdh-29832DiVA, id: diva2:876014
Tilgjengelig fra: 2015-12-02 Laget: 2015-12-02 Sist oppdatert: 2019-06-26bibliografisk kontrollert
Inngår i avhandling
1. Relaying for Industrial Wireless Networks
Åpne denne publikasjonen i ny fane eller vindu >>Relaying for Industrial Wireless Networks
2016 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
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.

sted, utgiver, år, opplag, sider
Västerås: Mälardalen University, 2016
Serie
Mälardalen University Press Dissertations, ISSN 1651-4238 ; 197
HSV kategori
Forskningsprogram
datavetenskap
Identifikatorer
urn:nbn:se:mdh:diva-29859 (URN)978-91-7485-247-9 (ISBN)
Disputas
2016-02-08, Zeta, Mälardalens högskola, Västerås, 13:15 (engelsk)
Opponent
Tilgjengelig fra: 2015-12-08 Laget: 2015-12-08 Sist oppdatert: 2018-01-10bibliografisk kontrollert

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