Mobile Throughput Guidance Inband Signaling Protocol
draft-flinck-mobile-throughput-guidance-04

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Last updated 2017-03-13
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Internet Engineering Task Force                                  A. Jain
Internet-Draft                                                 A. Terzis
Intended status: Informational                                    Google
Expires: September 14, 2017                                    H. Flinck
                                                             N. Sprecher
                                                          S. Arunachalam
                                                          Nokia Networks
                                                                K. Smith
                                                                Vodafone
                                                          V. Devarapalli
                                                            R. Bar Yanai
                                                         Vasona Networks
                                                          March 13, 2017

          Mobile Throughput Guidance Inband Signaling Protocol
             draft-flinck-mobile-throughput-guidance-04.txt

Abstract

   The bandwidth available for end user devices in cellular networks can
   vary by an order of magnitude over a few seconds due to changes in
   the underlying radio channel conditions, as device mobility and
   changes in system load as other devices enter and leave the network.
   Furthermore, packets losses are not always signs of congestion.  The
   Transmission Control Protocol (TCP) can have difficulties adapting to
   these rapidly varying conditions leading to inefficient use of a
   cellular network's resources and degraded application performance.
   Problem statement, requirements and the architecture for a solution
   is documented in [Req_Arch_MTG_Exposure].

   This document proposes a mechanism and protocol elements that allow
   the cellular network to provide near real-time information on
   capacity available to the TCP server.  This "Throughput Guidance"
   (TG) information would indicate the throughput estimated to be
   available at the radio downlink interface (between the Radio Access
   Network (RAN) and the mobile device (UE)).  TCP server can use this
   TG information to ensure high network utilization and high service
   delivery performance.  The document describes the applicability of
   the proposed mechanism for video delivery over cellular networks; it
   also presents test results from live operator's environment.

Status of This Memo

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

Jain, et al.           Expires September 14, 2017               [Page 1]
Internet-Draft         Mobile Throughput Guidance             March 2017

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   This Internet-Draft will expire on September 14, 2017.

Copyright Notice

   Copyright (c) 2017 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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Contributing Authors  . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.3.  Acronyms and Abbreviations  . . . . . . . . . . . . . . .   3
     1.4.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   4
     1.5.  Assumptions and Considerations for the Solution . . . . .   4
   2.  Protocol  . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     2.1.  Message Format  . . . . . . . . . . . . . . . . . . . . .   8
     2.2.  Authentication  . . . . . . . . . . . . . . . . . . . . .  10
   3.  Applicability to Video Delivery Optimization  . . . . . . . .  10
     3.1.  Test Results  . . . . . . . . . . . . . . . . . . . . . .  11
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