Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-02

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Last updated 2018-10-16
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DMM Working Group                                       U. Chunduri, Ed.
Internet-Draft                                                     R. Li
Intended status: Standards Track                              Huawei USA
Expires: April 19, 2019                                      J. Tantsura
                                                            Apstra, Inc.
                                                            L. Contreras
                                                              Telefonica
                                                               X. De Foy
                                        InterDigital Communications, LLC
                                                        October 16, 2018

                Transport Network aware Mobility for 5G
                   draft-clt-dmm-tn-aware-mobility-02

Abstract

   This document specifies a framework and a mapping function for 5G
   mobile user plane with transport network slicing, integrated with
   Mobile Radio Access and a Virtualized Core Network.  The integrated
   approach specified in a way to address all the mobility scenarios
   defined in [TS23.501] and to be backward compatible with LTE
   [TS.23.401-3GPP] network deployments.

   It focuses on an optimized mobile user plane functionality with
   various transport services needed for some of the 5G traffic needing
   low and deterministic latency, real-time, mission-critical services.
   This document describes, how this objective is achieved agnostic to
   the transport underlay used (IPv4, IPv6, MPLS) in various deployments
   and with a new transport network underlay routing, called Preferred
   Path Routing (PPR).

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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

Chunduri, et al.         Expires April 19, 2019                 [Page 1]
Internet-Draft   Transport Network aware Mobility for 5G    October 2018

   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on April 19, 2019.

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
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Table of Contents

   1.  Introduction and Problem Statement  . . . . . . . . . . . . .   3
     1.1.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Solution Approach . . . . . . . . . . . . . . . . . . . .   5
   2.  Transport Network (TN) and Slice aware Mobility on N3/N9  . .   5
     2.1.  Discrete Approach . . . . . . . . . . . . . . . . . . . .   6
     2.2.  Integrated Approach . . . . . . . . . . . . . . . . . . .   7
     2.3.  Transport Network Function  . . . . . . . . . . . . . . .   9
   3.  Using PPR as TN Underlay  . . . . . . . . . . . . . . . . . .   9
     3.1.  PPR with Transport Awareness for 5GS on N3/N9 Interfaces   10
     3.2.  Path Steering Support to native IP user planes  . . . . .  12
     3.3.  Service Level Guarantee in Underlay . . . . . . . . . . .  12
     3.4.  PPR with various 5G Mobility procedures . . . . . . . . .  12
       3.4.1.  SSC Mode1 . . . . . . . . . . . . . . . . . . . . . .  12
       3.4.2.  SSC Mode2 . . . . . . . . . . . . . . . . . . . . . .  13
       3.4.3.  SSC Mode3 . . . . . . . . . . . . . . . . . . . . . .  14
   4.  Other TE Technologies Applicability . . . . . . . . . . . . .  15
   5.  Summary and Benefits with PPR . . . . . . . . . . . . . . . .  15
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  16
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
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