Transport Network aware Mobility for 5G
draft-clt-dmm-tn-aware-mobility-09
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
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This Internet-Draft will expire on August 16, 2021.
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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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