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TCP Performance Evaluation in Wireless Mesh Networks using Packet Aggregation
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (Datavetenskap)ORCID iD: 0000-0002-4366-6625
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. (DISCO)ORCID iD: 0000-0002-9446-8143
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (Datavetenskap)ORCID iD: 0000-0001-7311-9334
2012 (English)Manuscript (preprint) (Other academic)
Abstract [en]

Wireless Mesh Networks (WMNs) have attracted attention as a way to provide alternative wireless Internet connectivity. In a WMN, access points communicate with each other wirelessly, forming a wireless mesh backbone network. One major problem in WMNs is low performance due to MAC and PHY layer overhead for transmission of small packets. Around 44 percent of the packets in the Internet are smaller than 100 bytes and a majority of these packets are TCP packets. The capacity of WMNs can therefore be increased significantly by packet aggregation (concatenation) of TCP packets. In this paper, we evaluate the impact of packet aggregation on TCP performance in WMNs. Using both synthetic and trace based traffic distributions we demonstrate that packet aggregation can not only increase capacity for TCP in such networks but also reduce round trip times.

Place, publisher, year, edition, pages
2012.
Keywords [en]
TCP, packet aggregation, Wireless Mesh Networks, performance evaluation, simulation, packet concatenation
National Category
Communication Systems
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:kau:diva-15600OAI: oai:DiVA.org:kau-15600DiVA, id: diva2:567789
Available from: 2012-12-06 Created: 2012-11-14 Last updated: 2018-07-23Bibliographically approved
In thesis
1. Transport-Layer Performance in Wireless Multi-Hop Networks
Open this publication in new window or tab >>Transport-Layer Performance in Wireless Multi-Hop Networks
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Wireless communication has seen a tremendous growth in the last decades. Continuing on this trend, wireless multi-hop networks  are nowadays used or planned for use in a multitude of contexts, spanning from Internet access at home to emergency situations.

The Transmission Control Protocol (TCP) provides reliable and ordered delivery of a data and is used by major Internet applications such as web browsers, email clients and file transfer programs. TCP traffic is also the dominating traffic type on the Internet. However, TCP performs less than optimal in wireless multi-hop networks due to packet reordering, low link capacity, packet loss and variable delay.

In this thesis, we develop novel proposals for enhancing the network and transport layer to improve TCP performance in wireless multi-hop networks. As initial studies, we experimentally evaluate the performance of different TCP variants, with and without mobile nodes. We further evaluate the impact of multi-path routing on TCP performance and propose packet aggregation combined with aggregation aware multi-path forwarding as a means to better utilize the available bandwidth. The last contribution is a novel extension to multi-path TCP to  enable single-homed hosts to fully utilize the network capacity.

Place, publisher, year, edition, pages
Karlstad: Karlstads universitet, 2013. p. 71
Series
Karlstad University Studies, ISSN 1403-8099 ; 2013:1
Keywords
TCP, MPTCP, transport protocols, packet aggregation, multi-path routing, reordering, wireless multi-hop networks, tactical MANET, mobile ad hoc networks, wireless mesh networks
National Category
Communication Systems
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-15603 (URN)978-91-7063-473-4 (ISBN)
Public defence
2013-03-04, 1B 364, Fröding, Karlstads Universitet, Karlstad, 10:15 (English)
Opponent
Supervisors
Note

Opponent changed. Prof. C. Lindeman from the University of Leipzig was substituted by Prof. Zhang.

Available from: 2013-02-08 Created: 2012-11-14 Last updated: 2018-07-23Bibliographically approved

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Karlsson, JonasKassler, AndreasBrunstrom, Anna

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