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OFDMA for Wireless Multihop Networks: From Theory to Practice

Loch, Adrian ; Hollick, Matthias ; Kühne, Alexander ; Klein, Anja (2015):
OFDMA for Wireless Multihop Networks: From Theory to Practice.
In: Pervasive and Mobile Computing, 23, pp. 104-121. Elsevier, ISSN 1574-1192,
DOI: 10.1016/j.pmcj.2015.07.003,
[Article]

Abstract

Orthogonal Frequency-Division Multiple Access (OFDMA) enables nodes to exploit spatial diversity in Wireless Mesh Networks (WMNs). As a result, throughput improves significantly. While existing work often considers the physical layer only, using OFDMA in a WMN also affects the link and network layers. In particular, multi-hop forwarding may result in severe bottlenecks since OFDMA resource allocations are typically based on local information only. In this paper, we design a practical system that mitigates such bottlenecks. To this end, we allow for resource allocation based on channel and traffic conditions at the physical layer, per-subcarrier coding at the link layer, and per-subcarrier packet segmentation at the network layer. We implement our approach on software-defined radios and show that it provides significant throughput gains compared to traditional schemes.

Item Type: Article
Erschienen: 2015
Creators: Loch, Adrian ; Hollick, Matthias ; Kühne, Alexander ; Klein, Anja
Title: OFDMA for Wireless Multihop Networks: From Theory to Practice
Language: English
Abstract:

Orthogonal Frequency-Division Multiple Access (OFDMA) enables nodes to exploit spatial diversity in Wireless Mesh Networks (WMNs). As a result, throughput improves significantly. While existing work often considers the physical layer only, using OFDMA in a WMN also affects the link and network layers. In particular, multi-hop forwarding may result in severe bottlenecks since OFDMA resource allocations are typically based on local information only. In this paper, we design a practical system that mitigates such bottlenecks. To this end, we allow for resource allocation based on channel and traffic conditions at the physical layer, per-subcarrier coding at the link layer, and per-subcarrier packet segmentation at the network layer. We implement our approach on software-defined radios and show that it provides significant throughput gains compared to traditional schemes.

Journal or Publication Title: Pervasive and Mobile Computing
Journal volume: 23
Publisher: Elsevier
Uncontrolled Keywords: C1E
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Telecommunications
18 Department of Electrical Engineering and Information Technology > Institute for Telecommunications > Communications Engineering
20 Department of Computer Science
20 Department of Computer Science > Sichere Mobile Netze
DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
LOEWE
LOEWE > LOEWE-Schwerpunkte
LOEWE > LOEWE-Schwerpunkte > NiCER – Networked infrastructureless Cooperation for Emergency Response
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1053: MAKI – Multi-Mechanisms Adaptation for the Future Internet
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1053: MAKI – Multi-Mechanisms Adaptation for the Future Internet > C: Communication Mechanisms
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1053: MAKI – Multi-Mechanisms Adaptation for the Future Internet > C: Communication Mechanisms > Subproject C1: Network-centred perspective
Date Deposited: 05 Apr 2016 11:09
DOI: 10.1016/j.pmcj.2015.07.003
Identification Number: TUD-CS-2015-12055
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