Transport Network aware Mobility for 5G

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Document Type Expired Internet-Draft (individual)
Authors Uma Chunduri  , Richard Li  , Sridhar Bhaskaran  , John Kaippallimalil  , Jeff Tantsura  , Luis Contreras  , Praveen Muley 
Last updated 2020-09-10 (latest revision 2020-03-09)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


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.


Uma Chunduri (
Richard Li (
Sridhar Bhaskaran (
John Kaippallimalil (
Jeff Tantsura (
Luis Contreras (
Praveen Muley (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)