Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-07

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Last updated 2020-09-28
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DMM Working Group                                       U. Chunduri, Ed.
Internet-Draft                                                     R. Li
Intended status: Informational                                 Futurewei
Expires: April 1, 2021                                      S. Bhaskaran
                                                               Altiostar
                                                  J. Kaippallimalil, Ed.
                                                               Futurewei
                                                             J. Tantsura
                                                            Apstra, Inc.
                                                            L. Contreras
                                                              Telefonica
                                                                P. Muley
                                                                   Nokia
                                                      September 28, 2020

                Transport Network aware Mobility for 5G
                   draft-clt-dmm-tn-aware-mobility-07

Abstract

   This document specifies a framework and mapping from slices in 5G
   mobile systems to transport slices in IP and Layer 2 transport
   networks.  Slices in 5G systems are characterized by latency bounds,
   reservation guarantees, jitter, data rates, availability, mobility
   speed, usage density, criticality and priority should be mapped to
   transport slice characteristics that include bandwidth, latency and
   criteria such as isolation, directionality and disjoint routes.
   Mobile slice criteria need to be mapped to the appropriate transport
   slice and capabilities offered in backhaul, midhaul and fronthaul
   connectivity segments between radio side network functions and user
   plane function (gateway).

   This document describes how mobile network functions map its slice
   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, Segment
   Routing).  Applicability of this framework 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 also discussed.

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].

Chunduri, et al.          Expires April 1, 2021                 [Page 1]
Internet-Draft   Transport Network aware Mobility for 5G  September 2020

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on April 1, 2021.

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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Problem Statement . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Solution Approach . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . .   5
   2.  Transport and Slice aware Mobility in 5G Networks . . . . . .   6
     2.1.  Backhaul and Mid-Haul Transport Network . . . . . . . . .   7
     2.2.  Front Haul Transport Network  . . . . . . . . . . . . . .   9
     2.3.  Mobile Transport Network Context (MTNC) and Scalability .   9
     2.4.  Transport Network Function (TNF)  . . . . . . . . . . . .  10
     2.5.  Transport Provisioning  . . . . . . . . . . . . . . . . .  11
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