Transport aware 5G mobility with PPR
draft-chunduri-dmm-5g-mobility-with-ppr-00

Document Type Active Internet-Draft (individual)
Authors Uma Chunduri  , Luis Contreras  , Sridhar Bhaskaran  , Jeff Tantsura  , Praveen Muley 
Last updated 2020-11-02
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DMM Working Group                                       U. Chunduri, Ed.
Internet-Draft                                                 Futurewei
Intended status: Informational                              L. Contreras
Expires: May 6, 2021                                          Telefonica
                                                            S. Bhaskaran
                                                               Altiostar
                                                             J. Tantsura
                                                            Apstra, Inc.
                                                                P. Muley
                                                                   Nokia
                                                        November 2, 2020

                  Transport aware 5G mobility with PPR
               draft-chunduri-dmm-5g-mobility-with-ppr-00

Abstract

   This document describes few 5G mobility scenarios and how mobile
   network functions map its SST criteria to identifiers in IP packets
   that transport segments use to grant transport layer services.  This
   is based on mapping between mobile and IP transport underlays (IPv6,
   MPLS, IPv4) and a new transport network underlay routing mechanism,
   Preferred Path Routing (PPR), which brings slice properties and works
   with any underlying transport (L2, IPv4, SR and MPLS) is described.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC2119 [RFC2119].

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/.

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   This Internet-Draft will expire on May 6, 2021.

Chunduri, et al.           Expires May 6, 2021                  [Page 1]
Internet-Draft    Transport aware 5G mobility with PPR     November 2020

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Transport Network Underlays . . . . . . . . . . . . . . . . .   4
     2.1.  Using PPR as TN Underlay  . . . . . . . . . . . . . . . .   4
       2.1.1.  PPR on F1-U/N3/N9 Interfaces  . . . . . . . . . . . .   5
       2.1.2.  Path Steering Support to native IP user planes  . . .   6
       2.1.3.  Service Level Guarantee in Underlay . . . . . . . . .   6
   3.  PPR with various 5G Mobility procedures . . . . . . . . . . .   7
     3.1.  SSC Mode1 . . . . . . . . . . . . . . . . . . . . . . . .   7
     3.2.  SSC Mode2 . . . . . . . . . . . . . . . . . . . . . . . .   8
     3.3.  SSC Mode3 . . . . . . . . . . . . . . . . . . . . . . . .   9
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   [I-D.clt-dmm-tn-aware-mobility] describes in detail on how TN aware
   mobility can be built irrespective of underlying TN technology used.

   This document specifies an approach to fulfil the needs of 5GS to
   transport user plane traffic from 5G-AN to UPF for all session and
   service continuity modes (SSC) [TS.23.501-3GPP] in an optimized
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