Architecture Discussion on SRv6 Mobile User plane
draft-kohno-dmm-srv6mob-arch-00

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DMM Working Group                                               M. Kohno
Internet-Draft                                                   F. Clad
Intended status: Informational                              P. Camarillo
Expires: May 4, 2020                                              Z. Ali
                                                     Cisco Systems, Inc.
                                                        November 1, 2019

           Architecture Discussion on SRv6 Mobile User plane
                    draft-kohno-dmm-srv6mob-arch-00

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, rather than from the viewpoint of individual layer.

   One important value propositions of SRv6 mobile user plane is the
   possible optimization across the existing multiple layers.

   This document discusses the architectural implications of applying
   SRv6 mobile user plane, especially regarding the possible
   optimization of existing layers.  Then it takes 5G requirements and
   use cases as an example, and describes how these use cases are simply
   and effectively realized with the inter-layer optimization capability
   of SRv6 mobile user plane.  Thus it show that SRv6 mobile use plane
   is a right architectural choice for the 5G era.

Status of This Memo

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   Internet-Drafts are working documents of the Internet Engineering
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Kohno, et al.              Expires May 4, 2020                  [Page 1]
Internet-Draft                SRv6mob-arch                 November 2019

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   This Internet-Draft will expire on May 4, 2020.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Architecture Consideration and Necessity of Inter-layer
       Optimization  . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   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.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

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 May 4, 2020                  [Page 2]
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