Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-06
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2020-03-09
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DMM Working Group U. Chunduri, Ed.
Internet-Draft R. Li
Intended status: Informational Futurewei
Expires: September 10, 2020 S. Bhaskaran
Altiostar
J. Kaippallimalil, Ed.
Futurewei
J. Tantsura
Apstra, Inc.
L. Contreras
Telefonica
P. Muley
Nokia
March 9, 2020
Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-06
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 September 10, 2020 [Page 1]
Internet-Draft Transport Network aware Mobility for 5G March 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
Task Force (IETF). Note that other groups may also distribute
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Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 10, 2020.
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
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
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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
2.6. MTNC-ID in the Data Packet . . . . . . . . . . . . . . . 12
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