Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-04

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Last updated 2019-07-08
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DMM Working Group                                       U. Chunduri, Ed.
Internet-Draft                                                     R. Li
Intended status: Informational                                 Futurewei
Expires: January 9, 2020                                    S. Bhaskaran
                                                               Altiostar
                                                             J. Tantsura
                                                            Apstra, Inc.
                                                            L. Contreras
                                                              Telefonica
                                                                P. Muley
                                                                   Nokia
                                                       J. Kaippallimalil
                                                               Futurewei
                                                            July 8, 2019

                Transport Network aware Mobility for 5G
                   draft-clt-dmm-tn-aware-mobility-04

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 is specified in a way to fit into the 5G core network
   architecture defined in [TS23.501].

   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 (IPv6, MPLS, IPv4) 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
   Task Force (IETF).  Note that other groups may also distribute

Chunduri, et al.         Expires January 9, 2020                [Page 1]
Internet-Draft   Transport Network aware Mobility for 5G       July 2019

   working documents as Internet-Drafts.  The list of current Internet-
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   This Internet-Draft will expire on January 9, 2020.

Copyright Notice

   Copyright (c) 2019 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  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Problem Statement . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Solution Approach . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Transport Network and Slice aware Mobility on N3/N9 . . . . .   5
     2.1.  Integrated Approach with TNF in SBI . . . . . . . . . . .   6
       2.1.1.  Transport Network Function and Interfaces . . . . . .   7
       2.1.2.  Functionality for E2E Management  . . . . . . . . . .   7
     2.2.  TNF as part of existing 5G Control Function . . . . . . .   9
       2.2.1.  Mobile Transport Network Context and Scalability  . .  11
       2.2.2.  MTNC Identifier in the Data Packet  . . . . . . . . .  12
   3.  Using PPR as TN Underlay  . . . . . . . . . . . . . . . . . .  12
     3.1.  PPR with Transport Awareness for 5GS on N3/N9 Interfaces   13
     3.2.  Path Steering Support to native IP user planes  . . . . .  15
     3.3.  Service Level Guarantee in Underlay . . . . . . . . . . .  15
   4.  Other TE Technologies Applicability . . . . . . . . . . . . .  15
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