Segment Routing IPv6 for Mobile User Plane
draft-ietf-dmm-srv6-mobile-uplane-03

Document Type Active Internet-Draft (dmm WG)
Last updated 2018-10-22
Replaces draft-matsushima-spring-dmm-srv6-mobile-uplane
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DMM Working Group                                          S. Matsushima
Internet-Draft                                                  SoftBank
Intended status: Standards Track                             C. Filsfils
Expires: April 25, 2019                                         M. Kohno
                                                            P. Camarillo
                                                     Cisco Systems, Inc.
                                                                D. Voyer
                                                             Bell Canada
                                                              C. Perkins
                                                               Futurewei
                                                        October 22, 2018

               Segment Routing IPv6 for Mobile User Plane
                  draft-ietf-dmm-srv6-mobile-uplane-03

Abstract

   This document shows the applicability of SRv6 (Segment Routing IPv6)
   to the user-plane of mobile networks.  The network programming nature
   of SRv6 accomplish mobile user-plane functions in a simple manner.
   The statelessness of SRv6 and its ability to control both service
   layer path and underlying transport can be beneficial to the mobile
   user-plane, providing flexibility and SLA control for various
   applications.  This document describes the SRv6 mobile user plane
   behavior and defines the SID functions for that.  It also provides a
   mechanism for end-to-end network slicing.

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
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   This Internet-Draft will expire on April 25, 2019.

Matsushima, et al.       Expires April 25, 2019                 [Page 1]
Internet-Draft             SRv6-mobile-uplane               October 2018

Copyright Notice

   Copyright (c) 2018 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
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions and Terminology . . . . . . . . . . . . . . . . .   3
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Conventions . . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  Predefined SRv6 Functions . . . . . . . . . . . . . . . .   4
   3.  Motivation  . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  A 3GPP Reference Architecture . . . . . . . . . . . . . . . .   6
   5.  User-plane behaviors  . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Traditional mode  . . . . . . . . . . . . . . . . . . . .   7
       5.1.1.  Packet flow - Uplink  . . . . . . . . . . . . . . . .   8
       5.1.2.  Packet flow - Downlink  . . . . . . . . . . . . . . .   8
       5.1.3.  IPv6 user-traffic . . . . . . . . . . . . . . . . . .   9
     5.2.  Enhanced Mode . . . . . . . . . . . . . . . . . . . . . .   9
       5.2.1.  Packet flow - Uplink  . . . . . . . . . . . . . . . .  10
       5.2.2.  Packet flow - Downlink  . . . . . . . . . . . . . . .  10
       5.2.3.  IPv6 user-traffic . . . . . . . . . . . . . . . . . .  11
     5.3.  Enhanced mode with unchanged gNB GTP behavior . . . . . .  11
       5.3.1.  Interworking with IPv6 GTP  . . . . . . . . . . . . .  12
       5.3.2.  Interworking with IPv4 GTP  . . . . . . . . . . . . .  15
       5.3.3.  Extensions to the interworking mechanisms . . . . . .  17
   6.  SRv6 SID Mobility Functions . . . . . . . . . . . . . . . . .  18
     6.1.  Args.Mob.Session  . . . . . . . . . . . . . . . . . . . .  18
     6.2.  End.MAP . . . . . . . . . . . . . . . . . . . . . . . . .  18
     6.3.  End.M.GTP6.D  . . . . . . . . . . . . . . . . . . . . . .  19
     6.4.  End.M.GTP6.E  . . . . . . . . . . . . . . . . . . . . . .  19
     6.5.  End.M.GTP4.E  . . . . . . . . . . . . . . . . . . . . . .  20
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