Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-03
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2019-02-14
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DMM Working Group U. Chunduri, Ed.
Internet-Draft R. Li
Intended status: Standards Track Huawei USA
Expires: August 18, 2019 S. Bhaskaran
Huawei Technologies India Pvt Ltd
J. Tantsura
Apstra, Inc.
L. Contreras
Telefonica
P. Muley
Nokia
February 14, 2019
Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-03
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 (IPv4, IPv6, MPLS) 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
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Chunduri, et al. Expires August 18, 2019 [Page 1]
Internet-Draft Transport Network aware Mobility for 5G February 2019
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 August 18, 2019.
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
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described in the Simplified BSD License.
Table of Contents
1. Introduction and Problem Statement . . . . . . . . . . . . . 3
1.1. Acronyms . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2. Solution Approach . . . . . . . . . . . . . . . . . . . . 5
2. Transport Network (TN) and Slice aware Mobility on N3/N9 . . 5
2.1. Discrete Approach . . . . . . . . . . . . . . . . . . . . 7
2.2. Integrated Approach . . . . . . . . . . . . . . . . . . . 8
2.3. Transport Network Function . . . . . . . . . . . . . . . 10
3. Using PPR as TN Underlay . . . . . . . . . . . . . . . . . . 10
3.1. PPR with Transport Awareness for 5GS on N3/N9 Interfaces 11
3.2. Path Steering Support to native IP user planes . . . . . 13
3.3. Service Level Guarantee in Underlay . . . . . . . . . . . 13
3.4. PPR with various 5G Mobility procedures . . . . . . . . . 13
3.4.1. SSC Mode1 . . . . . . . . . . . . . . . . . . . . . . 13
3.4.2. SSC Mode2 . . . . . . . . . . . . . . . . . . . . . . 14
3.4.3. SSC Mode3 . . . . . . . . . . . . . . . . . . . . . . 15
4. Other TE Technologies Applicability . . . . . . . . . . . . . 16
5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 17
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17
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