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Impact of Multi-path Routing on TCP Performance in Wireless Mesh Networks
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (Datavetenskap)
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (Datavetenskap)ORCID iD: 0000-0002-8731-2482
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (Datavetenskap)
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (Datavetenskap)
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2012 (English)In: Proceedings of the 8th Swedish National Computer Networking Workshop (SNCNW 2012), 2012Conference paper, (Refereed)
Abstract [en]

Routing packets over multiple disjoint paths to- wards a destination can increase network utilization by load- balancing the traffic over the network. The drawback of load-balancing is that different paths might have different delay properties, causing packets to be reordered. This can reduce TCP performance significantly, as reordering is interpreted as a sign of congestion. Packet reordering can be avoided by letting the network layer route strictly on flow-level. This will, however, also limit the ability to achieve optimal network throughput. There are also several proposals that try to mitigate the effects of reordering at the transport layer. In this paper, we perform an initial evaluation of such TCP reordering mitigations in multi-radio multi-channel wireless mesh networks when using multi-path routing. We evaluate two TCP reordering mitigation techniques implemented in the Linux kernel. The transport layer mitigations are compared using different multi-path routing strategies. Our findings show that, in general, flow-level routing gives the best TCP performance and that transport layer reordering mitigations only marginally can improve performance. 

Place, publisher, year, edition, pages
2012.
Keyword [en]
TCP, reordering, wireless mesh networks, multi-channel, multi-radio, multi-path
National Category
Communication Systems
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:kau:diva-13630OAI: oai:DiVA.org:kau-13630DiVA: diva2:533356
Conference
8th Swedish National Computer Networking Workshop (SNCNW 2012), June 7th 2012, Stockholm, Sweden
Available from: 2012-06-13 Created: 2012-06-13 Last updated: 2014-11-21Bibliographically approved

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Karlsson, JonasHurtig, PerBrunstrom, AnnaKassler, Andreas
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CiteExportLink to record
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Citation style
  • apa
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