Measurement, Modeling, and Analysis of TCP in High-Speed Mobility Scenarios

Qingfang Liu, Ke Xu, Haiyang Wang, Meng Shen, Li Li, Qingyang Xiao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

The rapid growth of high-speed transit systems, such as High Speed Rail (HSR), is putting considerable pressure on TCP-based data transmission. It is well known that TCP is suffering from severe throughput degradation in high-speed mobility scenarios. The root cause at the transport layer however remains unclear and largely undetermined to date. In this paper, we aim to pinpoint the throughput bottlenecks and develop a throughput model to understand TCP in high-speed mobility environments. Based on the analysis of real-world HSR traces, we find that high-speed mobility will introduce significant challenges to the packet retransmission process after timeouts. And ACKs are more likely to trigger spurious retransmission timeouts in TCP flows in high-speed mobile environments. Such problems are not yet considered in the existing TCP models because classic timeouts can easily be recovered by retransmission in stationary scenarios. We therefore propose an enhanced TCP throughput model to integrate the above features. Our model analysis indicates that the optimization of TCP ACK latency is critical to obtain better throughput. Moreover, reliable retransmission mechanisms, e.g., multi-path TCP (MPTCP), can also bring notable benefits in high-speed mobility environments.

Original languageEnglish (US)
Title of host publicationProceedings - 2016 IEEE 36th International Conference on Distributed Computing Systems, ICDCS 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages629-638
Number of pages10
ISBN (Electronic)9781509014828
DOIs
StatePublished - Aug 8 2016
Externally publishedYes
Event36th IEEE International Conference on Distributed Computing Systems, ICDCS 2016 - Nara, Japan
Duration: Jun 27 2016Jun 30 2016

Publication series

NameProceedings - International Conference on Distributed Computing Systems
Volume2016-August

Other

Other36th IEEE International Conference on Distributed Computing Systems, ICDCS 2016
CountryJapan
CityNara
Period6/27/166/30/16

Keywords

  • high-speed mobility scenarios
  • measurement
  • modeling TCP throughput

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