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ThinkMind // INTERNET 2020, The Twelfth International Conference on Evolving Internet // View article internet_2020_1_90_40036


Why Multipath TCP Degrades Throughput under Insufficient Send Socket Buffer and Differently Delayed Paths

Authors:
Toshihiko Kato
Adhikari Diwakar
Ryo Yamamoto
Satoshi Ohzahata

Keywords: multipath TCP; send socket buffer; head-of-line blocking.

Abstract:
Recently, the Multipath Transmission Control Protocol (MPTCP) comes to be used widely. It allows more than one TCP connections via different paths to compose one Multipath TCP communication. Our previous papers pointed out that insufficient send socket buffer makes the throughput worse than that of single path TCP, when the subflows have different transmission delays. Although our previous papers gave the detailed analysis on the throughput degradation focusing on the relationship between the send socket buffer size and the delay, they did not clarify the reason of the throughput degradation. This paper investigates the Linux MPTCP software and the MPTCP communication details, and clarifies why the insufficient socket buffer degrades the MPTCP throughput.

Pages: 48 to 53

Copyright: Copyright (c) IARIA, 2020

Publication date: October 18, 2020

Published in: conference

ISSN: 2308-443X

ISBN: 978-1-61208-796-2

Location: Porto, Portugal

Dates: from October 18, 2020 to October 22, 2020

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