Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-04
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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-
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 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
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
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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