Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Recent Trends in TCP Packet-Level Characteristics
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (Datavetenskap)ORCID iD: 0000-0002-8731-2482
Department of Computer Science and Engineering, Chalmers University of Technology.
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (Datavetenskap)
2011 (English)In: Proceedings of the 7th International Conference on Networking and Services (ICNS), Venice/Mestre, Italy: IARIA , 2011, 179-195 p.Conference paper, Published paper (Refereed)
Abstract [en]

Up-to-date TCP traffic characteristics are essential for research and development of protocols and applications. This paper presents recent trends observed in 70 measurements on backbone links from 2006 and 2009. First, we provide general characteristics such as packet size distributions and TCP option usage. We confirm previous observations such as the dominance of TCP as transport and higher utilization of TCP options. Next, we look at out-of-sequence (OOS) TCP segments. OOS segments often have negative effects on TCP performance, and therefore require special consideration. While the total fraction of OOS segments is stable in our measurements, we observe a significant decrease in OOS due to packet reordering (from 22.5% to 5.2% of all OOS segments). We verify that this development is a general trend in our measurements and not caused by single hosts/networks or special temporal events. Our findings are surprising as many researchers previously have speculated in an increased amount of reordering.

Place, publisher, year, edition, pages
Venice/Mestre, Italy: IARIA , 2011. 179-195 p.
Keyword [en]
traffic measurement; TCP; reordering
National Category
Computer Systems
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:kau:diva-8878ISBN: 978-1-61208-133-5 (print)OAI: oai:DiVA.org:kau-8878DiVA: diva2:462709
Conference
The 7th International Conference on Networking and Services (ICNS), Venice/Mestre, Italy, May 2011
Available from: 2011-12-07 Created: 2011-12-07 Last updated: 2014-11-21Bibliographically approved
In thesis
1. Transport-Layer Performance for Applications and Technologies of the Future Internet
Open this publication in new window or tab >>Transport-Layer Performance for Applications and Technologies of the Future Internet
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

To provide Internet applications with good performance, the transport protocol TCP is designed to optimize the throughput of data transfers. Today, however, more and more applications rely on low latency rather than throughput. Such applications can be referred to as data-limited and are not appropriately supported by TCP. Another emerging problem is associated with the use of novel networking techniques that provide infrastructure-less networking. To improve connectivity and performance in such environments, multi-path routing is often used. This form of routing can cause packets to be reordered, which in turn hurts TCP performance.

To address timeliness issues for data-limited traffic, we propose and experimentally evaluate several transport protocol adaptations. For instance, we adapt the loss recovery mechanisms of both TCP and SCTP to perform faster loss detection for data-limited traffic, while preserving the standard behavior for regular traffic. Evaluations show that the proposed mechanisms are able to reduce loss recovery latency with 30-50%. We also suggest modifications to the TCP state caching mechanisms. The caching mechanisms are used to optimize new TCP connections based on the state of old ones, but do not work properly for data-limited flows. Additionally, we design a SCTP mechanism that reduces overhead by bundling several packets into one packet in a more timely fashion than the bundling normally used in SCTP.

To address the problem of packet reordering we perform several experimental evaluations, using TCP and state of the art reordering mitigation techniques. Although the studied mitigation techniques are quite good in helping TCP to sustain its performance during pure packet reordering events, they do not help when other impairments like packet loss are present.

Place, publisher, year, edition, pages
Karlstad: Karlstads universitet, 2012. 30 p.
Series
Karlstad University Studies, ISSN 1403-8099 ; 2011:65
Keyword
TCP, SCTP, transport protocols, loss recovery, packet reordering, congestion control, performance evaluation
National Category
Computer Systems
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-8920 (URN)978-91-7063-404-8 (ISBN)
Public defence
2012-02-09, 1B364 (Frödingsalen), Karlstads universitet, Karlstad, 13:15 (English)
Opponent
Supervisors
Note

Paper V was in manuscript form at the time of the defense.

Available from: 2012-01-13 Created: 2011-12-08 Last updated: 2016-10-15Bibliographically approved

Open Access in DiVA

No full text

Other links

http://www.thinkmind.org/index.php?view=article&articleid=icns_2011_3_20_10145

Search in DiVA

By author/editor
Hurtig, PerBrunstrom, Anna
By organisation
Department of Computer Science
Computer Systems

Search outside of DiVA

GoogleGoogle Scholar

Total: 147 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf