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Improving multipath TCP performance over WiFi and cellular networks: an analytical approach

journal contribution
posted on 01.11.2019, 00:00 authored by Shiva PokhrelShiva Pokhrel, M Mandjes
IEEE A complete understanding of the dynamics of Multipath TCP (MPTCP) over Cellular and WiFi networks is still lacking. This is a highly challenging issue, as a consequence of the complex interdependencies between the losses, packet reordering due to heterogeneous wireless channel features, errors and link layer retransmissions, as well as their (joint) influence on MPTCP's control mechanism. In this paper we develop a comprehensive approach that is capable of assessing the performance of long-lived MPTCP flows with joint WiFi and Cellular network access, taking into account the diverse characteristics of both types of networks. Relying on a parallel queueing model, we develop a framework that features the controllable network parameters, such as the retransmission limit and the buffer sizes, so as to capture their impact on the TCP-level performance. We include a variety of numerical and simulation results highlighting various non-trivial findings and insights for adaptive MPTCP design. In particular, we design a novel MPTCP algorithm to exploit the route heterogeneity, and demonstrate that the proposed algorithm is capable of learning the network's characteristics. It also identifies the improved MPTCP window increment parameters for any given set of channel errors, retransmission limits, and buffer sizes.

History

Journal

IEEE transactions on mobile computing

Volume

18

Issue

11

Pagination

2562 - 2576

Publisher

Institute of Electrical and Electronics Engineers

Location

Piscataway, N.J.

ISSN

1536-1233

eISSN

1558-0660

Language

eng

Publication classification

C Journal article; C1.1 Refereed article in a scholarly journal

Copyright notice

2018, IEEE