Diffserv to QCI Mapping
draft-henry-tsvwg-diffserv-to-qci-04

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Network Working Group                                           J. Henry
Internet-Draft                                                T. Szigeti
Intended status: Informational                                     Cisco
Expires: October 15, 2020                                   L. Contreras
                                                              Telefonica
                                                          April 13, 2020

                        Diffserv to QCI Mapping
                  draft-henry-tsvwg-diffserv-to-qci-04

Abstract

   As communication devices become more hybrid, smart devices include
   more media-rich communication applications, and the boundaries
   between telecommunication and other applications becomes less clear.
   Simultaneously, as the end-devices become more mobile, application
   traffic transits more often between enterprise networks, the
   Internet, and cellular telecommunication networks, sometimes using
   simultaneously more than one path and network type.  In this context,
   it is crucial that quality of service be aligned between these
   different environments.  However, this is not always the case by
   default, and cellular communication networks use a different QoS
   nomenclature from the Internet and enterprise networks.  This
   document specifies a set of 3rd Generation Partnership Project (3GPP)
   Quality of Service (QoS) Class Identifiers (QCI) and 5G QoS
   Identifiers (5QI) to Differentiated Services Code Point (DSCP)
   mappings, to reconcile the marking recommendations offered by the
   3GPP with the recommendations offered by the IETF, so as to maintain
   a consistent QoS treatment between cellular networks and the
   Internet.  This mapping can be used by enterprises or implementers
   expecting traffic to flow through both types of network, and wishing
   to align the QoS treatment applied to one network under their control
   with the QoS treatment applied to the other network.

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any

Henry, et al.           Expires October 15, 2020                [Page 1]
Internet-Draft                DIFFSERV-QCI                    April 2020

   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 15, 2020.

Copyright Notice

   Copyright (c) 2020 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.  Related Work  . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Applicability Statement . . . . . . . . . . . . . . . . .   5
     1.3.  Document Organization . . . . . . . . . . . . . . . . . .   5
     1.4.  Requirements language . . . . . . . . . . . . . . . . . .   6
     1.5.  Terminology Used in this Document . . . . . . . . . . . .   6
   2.  Service Comparison and Default Interoperation of Diffserv and
       3GPP LTE and 5G . . . . . . . . . . . . . . . . . . . . . . .   7
     2.1.  Diffserv Domain Boundaries  . . . . . . . . . . . . . . .   7
     2.2.  QCI and Bearer Model in 3GPP  . . . . . . . . . . . . . .   8
     2.3.  QCI Definition and Logic  . . . . . . . . . . . . . . . .   9
       2.3.1.  Conversational  . . . . . . . . . . . . . . . . . . .   9
       2.3.2.  Streaming . . . . . . . . . . . . . . . . . . . . . .  10
       2.3.3.  Interactive . . . . . . . . . . . . . . . . . . . . .  10
       2.3.4.  Background  . . . . . . . . . . . . . . . . . . . . .  10
     2.4.  QCI implementations . . . . . . . . . . . . . . . . . . .  13
     2.5.  5QI and flow-based QoS Model in 3GPP 5G . . . . . . . . .  13
     2.6.  GSMA IPX Guidelines Interpretation and Conflicts  . . . .  17
   3.  P-GW Device Marking and Mapping Capability Recommendations  .  18
   4.  DSCP to QCI or 5QI Mapping Recommendations  . . . . . . . . .  19