Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-09

Document Type Active Internet-Draft (individual)
Authors Uma Chunduri  , Richard Li  , Sridhar Bhaskaran  , John Kaippallimalil  , Jeff Tantsura  , Luis Contreras  , Praveen Muley 
Last updated 2021-02-12
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DMM Working Group                                       U. Chunduri, Ed.
Internet-Draft                                                     R. Li
Intended status: Informational                                 Futurewei
Expires: August 16, 2021                                    S. Bhaskaran
                                                               Altiostar
                                                  J. Kaippallimalil, Ed.
                                                               Futurewei
                                                             J. Tantsura
                                                            Apstra, Inc.
                                                            L. Contreras
                                                              Telefonica
                                                                P. Muley
                                                                   Nokia
                                                       February 12, 2021

                Transport Network aware Mobility for 5G
                   draft-clt-dmm-tn-aware-mobility-09

Abstract

   This document specifies a framework and mapping from slices in 5G
   mobile systems to transport slices in IP, Layer 2 and Layer 1
   transport networks.  Slices in 5G systems are characterized by
   latency bounds, reservation guarantees, jitter, data rates,
   availability, mobility speed, usage density, criticality and
   priority.  These characteristics should be mapped to the transport
   network 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 and Layer 2 packets that transport
   network segments use to grant transport layer services during UE
   mobility scenarios.  Applicability of this framework and underlying
   transport networks, which can enable different slice properties are
   also discussed.  This is based on mapping between mobile and
   transport underlays (L2, Segment Routing, IPv6, MPLS and IPv4).

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 August 16, 2021                [Page 1]
Internet-Draft   Transport Network aware Mobility for 5G   February 2021

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 August 16, 2021.

Copyright Notice

   Copyright (c) 2021 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.  IETF Network Slicing Terminology  . . . . . . . . . . . .   4
     1.2.  Problem Statement . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Solution Approach . . . . . . . . . . . . . . . . . . . .   5
     1.4.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . .   5
   2.  Transport and Slice aware Mobility in 5G Networks . . . . . .   7
     2.1.  Backhaul and Mid-Haul Transport Network . . . . . . . . .   8
       2.1.1.  IETF Network Slicing Applicability  . . . . . . . . .  10
       2.1.2.  Front Haul Transport Network  . . . . . . . . . . . .  10
     2.2.  Mobile Transport Network Context (MTNC) and Scalability .  10
     2.3.  Transport Network Function (TNF)  . . . . . . . . . . . .  11
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