Architecture Discussion on SRv6 Mobile User plane
draft-kohno-dmm-srv6mob-arch-02

Document Type Active Internet-Draft (individual)
Authors Miya Kohno  , Francois Clad  , Pablo Camarillo  , Zafar Ali 
Last updated 2020-09-09
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DMM Working Group                                               M. Kohno
Internet-Draft                                                   F. Clad
Intended status: Informational                              P. Camarillo
Expires: March 8, 2021                                            Z. Ali
                                                     Cisco Systems, Inc.
                                                       September 4, 2020

           Architecture Discussion on SRv6 Mobile User plane
                    draft-kohno-dmm-srv6mob-arch-02

Abstract

   Layer separation is a powerful concept in system architecture.  In
   the area of mobility, by separating GTP-U that is the overlay tunnel,
   and the IP transport network that is the underlay, the operation of
   the mobile network and the transport network can be separated,
   allowing them to evolve independently.

   However, evolving individually at each layer promotes local
   optimization and may result in non-optimal solutions overall in the
   long run.

   When a drastic architectural transition is required, for example, in
   the 5G era where various SLAs and completely new data intensive
   services are assumed, it is necessary to reconsider the architecture
   holistically, not from the viewpoint of individual part.

   One of important value propositions of SRv6 mobile user plane is to
   create overlay with underlay optimization.

   This document discusses the architecture implication of applying SRv6
   mobile user plane.  Then it takes 5G use cases as an example, and
   describes how these use cases are simply and effectively realized.
   Thus it shows that SRv6 mobile use plane is a right architectural
   choice for 5G era.

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Kohno, et al.             Expires March 8, 2021                 [Page 1]
Internet-Draft                SRv6mob-arch                September 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Architecture Consideration and Necessity of Inter-layer
       Optimization  . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  SRv6 mobile user plane and the 5G use cases . . . . . . . . .   5
     4.1.  Network Slicing . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  Edge Computing  . . . . . . . . . . . . . . . . . . . . .   6
     4.3.  URLLC (Ultra-Reliable Low-Latency Communication) support    7
   5.  Incremental Deployment  . . . . . . . . . . . . . . . . . . .   8
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   Layer separation is a powerful concept in system architecture.  In
   the area of mobility, by separating GTP-U that is the overlay tunnel,
   and the IP transport network that is the underlay, the operation of
   the mobile network and the transport network can be separated,
   allowing them to evolve independently.

Kohno, et al.             Expires March 8, 2021                 [Page 2]
Internet-Draft                SRv6mob-arch                September 2020

   However, evolving individually at each layer promotes local
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