Mobile network delay characteristics and interactions with the transport layer

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School of Electrical Engineering | Doctoral thesis (article-based) | Defence date: 2018-01-19
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Authors

Date

2017

Department

Tietoliikenne- ja tietoverkkotekniikan laitos
Department of Communications and Networking

Major/Subject

Mcode

Degree programme

Language

en

Pages

74 + app. 68

Series

Aalto University publication series DOCTORAL DISSERTATIONS, 244/2017

Abstract

Mobile networks have become an integral part of every day life, and many users rely on its presence and performance. In the past years user num bers and traffic volume has skyrocketed, as adoption of the technology continues to increase. The popularity of internet based services in mobile networks and the increase in user numbers makes the available resources precious and ever more important to use them: a user's satisfaction is inversely proportional to the time it takes for the requested content to load. While the mobile network sets an upper bound on the transmission rate, it is up to the delivering end point to make use of these resources, which for many applications is in the hands of the Transmission Control Protocol (TCP). As TCP has to make the best use of the resources in every situation, it is vital to understand the interactions between the protocol and the mobile network in order to achieve best performance. This work is a measurement based study on the performance of TCP in Finnish 3rd generation (3G) and 4th generation (4G) mobile networks. First, it is investigated how the round-trip time (RTT) behaves throughout end-to-end connections traversing mobile networks, on long term as well as on short term in the form of delay spikes. Second, the proper way for TCP to deal with these delay spikes is examined. Lastly, the interactions of TCP with the mobile network is investigated in real-life situations and causes for sub-optimal performance is extracted. The thesis concludes with a discussion on what is necessary to improve TCP performance in mobile networks, and the changes coming with future networks and algorithms.

Description

Supervising professor

Manner, Jukka, Prof., Aalto University, Department of Communications and Networking, Finland

Thesis advisor

Manner, Jukka, Prof., Aalto University, Department of Communications and Networking , Finland

Keywords

mobile networks, TCP, performance measurement, interactions

Other note

Parts

  • [Publication 1]: Sebastian Sonntag, Lennart Schulte, Jukka Manner. Mobile network measurements – It’s not all about signal strength. In IEEE WirelessCommunicationsandNetworkingConference(WCNC), Shanghai, China, April 2013. pp. 4624–4629,
    DOI: 10.1109/WCNC.2013.6555324 View at publisher
  • [Publication 2]: Sebastian Sonntag, Jukka Manner, Lennart Schulte. Netradar – Measuring the wireless world. In 9th International Workshop on Wireless Network Measurements (WiNMee), Tsukuba Science City, Japan, May 2013, pp. 29–34
  • [Publication 3]: Lennart Schulte, Gautam Moktan, Mikko Särelä, Jukka Manner. Towards understanding interruption and reordering in HSPA/HSPA+ networks. In Seventh International Workshop on Selected Topics in Mobile and Wireless Computing (STWiMob), Larnaca, Cyprus, October 2014. pp. 51–57,
    DOI: 10.1109/WiMOB.2014.6962149 View at publisher
  • [Publication 4]: Sebastian Sonntag, Lennart Schulte, Jukka Manner. No links left behind. Computer Communications (ComCom), October 2017, Volume 111, Pages 97-104,
    DOI: 10.1016/j.comcom.2017.07.007 View at publisher
  • [Publication 5]: Lennart Schulte, Alexander Zimmermann, Puneeth Nanjundaswamy, Lars Eggert, Jukka Manner. I’ll be a bit late – Packet Reordering in Mobile Networks. Accepted for publication in KICS Journal of Communications and Networks (JCN), March 2017
  • [Publication 6]: Lennart Schulte, Eren Boz, Nuutti Varis, Jukka Manner. On detecting TCP path saturation in LTE networks. Wiley International Journal of Communication Systems (IJCS), April 2017.
    DOI: 10.1002/dac.3334 View at publisher

Citation

Permanent link to this item

https://urn.fi/URN:ISBN:978-952-60-7762-8

Collections

[diss] Sähkötekniikan korkeakoulu / ELEC