Mobile Communication Congestion Exposure Scenario
RFC 7778

Document Type RFC - Informational (March 2016; No errata)
Last updated 2016-03-11
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Internet Engineering Task Force (IETF)                       D. Kutscher
Request for Comments: 7778                                        F. Mir
Category: Informational                                        R. Winter
ISSN: 2070-1721                                                      NEC
                                                             S. Krishnan
                                                                Ericsson
                                                                Y. Zhang
                                                    Hewlett Packard Labs
                                                           CJ. Bernardos
                                                                    UC3M
                                                              March 2016

           Mobile Communication Congestion Exposure Scenario

Abstract

   This memo describes a mobile communications use case for congestion
   exposure (ConEx) with a particular focus on those mobile
   communication networks that are architecturally similar to the 3GPP
   Evolved Packet System (EPS).  This memo provides a brief overview of
   the architecture of these networks (both access and core networks)
   and current QoS mechanisms and then discusses how congestion exposure
   concepts could be applied.  Based on this discussion, this memo
   suggests a set of requirements for ConEx mechanisms that particularly
   apply to these mobile networks.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7778.

Kutscher, et al.              Informational                     [Page 1]
RFC 7778                  ConEx Mobile Scenario               March 2016

Copyright Notice

   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 Provisions Relating to IETF
   Documents (http://trustee.ietf.org/license-info) in effect on the
   date of publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  ConEx Use Cases in Mobile Communication Networks  . . . . . .   4
     2.1.  ConEx as a Basis for Traffic Management . . . . . . . . .   5
     2.2.  ConEx to Incentivize Scavenger Transports . . . . . . . .   7
     2.3.  Accounting for Congestion Volume  . . . . . . . . . . . .   7
     2.4.  Partial vs. Full Deployment . . . . . . . . . . . . . . .   8
     2.5.  Summary . . . . . . . . . . . . . . . . . . . . . . . . .   9
   3.  ConEx in the EPS  . . . . . . . . . . . . . . . . . . . . . .   9
     3.1.  Possible Deployment Scenarios . . . . . . . . . . . . . .   9
     3.2.  Implementing ConEx Functions in the EPS . . . . . . . . .  14
       3.2.1.  ConEx Protocol Mechanisms . . . . . . . . . . . . . .  15
       3.2.2.  ConEx Functions in the Mobile Network . . . . . . . .  15
   4.  Summary . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  19
   6.  Informative References  . . . . . . . . . . . . . . . . . . .  19
   Appendix A.  Overview of 3GPP's EPS . . . . . . . . . . . . . . .  22
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  24
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  24

Kutscher, et al.              Informational                     [Page 2]
RFC 7778                  ConEx Mobile Scenario               March 2016

1.  Introduction

   Mobile data traffic continues to grow rapidly.  The challenge
   wireless operators face is to support more subscribers with an
   increasing bandwidth demand.  To meet these bandwidth requirements,
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