Initial-Path Selection for Connection Establishment in Multipath TCP
draft-kang-mptcp-initial-path-selection-00

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Last updated 2019-02-21
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MPTCP Working Group                                                J.Zhu
Internet Draft                                                   J. Kang
Intended Category: Experimental                                   F.Wang
Expires: August 22, 2019                                            T.Li
                                                                 K.Zheng
                                                                  Huawei
                                                       February 22, 2019

  Initial-Path Selection for Connection Establishment in Multipath TCP
               draft-kang-mptcp-initial-path-selection-00

Abstract

   This draft presents an optimal mechanism for the selection of initial
   path to address the problem caused by the sequential subflow
   establishment defined in current MPTCP. We propose the general
   architecture and procedures, along with the background analysis, use
   cases and results of this proposal.

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on August 2, 2019.

Copyright and License Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors. All rights reserved.
 

J. Kang, et al          Expires August 22, 2019                 [Page 1]
INTERNET-DRAFT           Initial-Path Selection        February 22, 2019

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Table of Contents

   1. Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3. Architecture  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   4. Typical Flows . . . . . . . . . . . . . . . . . . . . . . . . .  4
   5. Possibilities Analysis  . . . . . . . . . . . . . . . . . . . .  7
   6. Path decision information . . . . . . . . . . . . . . . . . . .  8
   7. Examples  . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
   8. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
   9. Result  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
   10. Compatibility Consideration  . . . . . . . . . . . . . . . . . 12
   11. Security Considerations  . . . . . . . . . . . . . . . . . . . 13
   12. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 13
   13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     13.1. Normative References . . . . . . . . . . . . . . . . . . . 13
     13.2. Informative References . . . . . . . . . . . . . . . . . . 13
   Author's Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15

1. Introduction

   Multipath TCP enables hosts to exchange packets belonging to a single
   connection over several paths. Usually, these paths correspond to
   different networks (such as cellular and WiFi) relying on the network
   interfaces configured on a terminal. MPTCP initializes multiple
   connections in sequence, that is, when one subflow is set up in the
   manner of a three-way handshake, being as the initial subflow,
   additional subsequent subflows can be created by a special four-way
   handshake. These subflows are bound to MPTCP session. The data on the
   sender can be selected for transmission on one of these subflows or
   on all the subflows through the scheduler.

   The path or network interface for the initial subflow is configured
   by default for all connections in one system. For example, if LTE and
   WiFi are offered in mobile phone, WiFi is the default path for the
   initial subflow generally. 

 

J. Kang, et al          Expires August 22, 2019                 [Page 2]
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