Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-08

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

                Transport Network aware Mobility for 5G
                   draft-clt-dmm-tn-aware-mobility-08

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.  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 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 is 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 May 6, 2021                  [Page 1]
Internet-Draft   Transport Network aware Mobility for 5G   November 2020

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 May 6, 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  . . . . . . . . . . . . . . . . . . . . . . . .   4
   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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