Efficient Transmission in Virtual Multi-path TCP
draft-zhang-virtual-multi-path-tcp-00

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Multipath TCP Working Group                                        K. Xu
Internet-Draft                                                  Y. Zhang
Intended status: Informational                       Tsinghua University
Expires: June 3, 2017                                            M. Shen
                                         Beijing Institute of Technology
                                                                   Z. Ge
                                                                 X. Wang
                                                     Tsinghua University
                                                       November 30, 2016

            Efficient Transmission in Virtual Multi-path TCP
                 draft-zhang-virtual-multi-path-tcp-00

Abstract

   Traditional MPTCP [RFC6824] requires that at least one node in a pair
   should equipped more than one NIC, and this limits the deployment
   [RFC6182] of MPTCP.  This document proposes the VMPTCP (Virtual
   Multi-Path TCP) and describes how to build TCP sub-connections in
   VMPTCP among nodes with just one NIC.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on June 3, 2017.

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   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

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Internet-Draft           virtual multi-path TCP            November 2016

   carefully, as they describe your rights and restrictions with respect
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  An application of VMPTCP in wireless LAN  . . . . . . . . . .   4
     3.1.  Sub-connection 1: The first connection  . . . . . . . . .   4
     3.2.  Sub-connection 2 and 3: The joint connection  . . . . . .   5
     3.3.  Merge flows from multiple sub-connections together  . . .   5
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   5.  Dynamics Considerations . . . . . . . . . . . . . . . . . . .   5
     5.1.  Node failure  . . . . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   There are multiple pathes in Multi-path TCP [RFC6824].  To build more
   than one TCP sub-connections, MPTCP requires at least one node in the
   communication peer should be equipped with more than one NIC.

   [RFC6356] describes the use of MPTCP for congestion control,
   [RFC6181] and [RFC6824] describe the TCP extensions for multipath
   operation with multiple addresses.  The TCP connections, SYN and ACK
   messages, and the session key are carried in TCP.

   However, this imposes restrictions on the deployment of MPTCP:

   o  A node eqiupped with just one NIC cannot benifit from MPTCP, and
      it is expensive to embed extra NICs to network elments

   o  MPTCP works as a one-to-one manner

   o  The I/O resources on the NIC are reserved for a particular
      transmission.  This results in less efficient bandwidth usage

   This document describes how to build virtualized TCP sub-connections
   among multiple single-NIC network elements.  The main advantages of
   using VMPTCP in traditional network environment are as follows:

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