Architecture Discussion on SRv6 Mobile User plane
draft-kohno-dmm-srv6mob-arch-03

Document Type Active Internet-Draft (individual)
Authors Miya Kohno  , Francois Clad  , Pablo Camarillo  , Zafar Ali 
Last updated 2020-11-02
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DMM Working Group                                               M. Kohno
Internet-Draft                                                   F. Clad
Intended status: Informational                              P. Camarillo
Expires: May 6, 2021                                              Z. Ali
                                                     Cisco Systems, Inc.
                                                        November 2, 2020

           Architecture Discussion on SRv6 Mobile User plane
                    draft-kohno-dmm-srv6mob-arch-03

Abstract

   This document discusses a solution approach and its architectural
   benefits of common data plane across domains and across overlay/
   underlay.

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   This Internet-Draft will expire on May 6, 2021.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Problem Definition  . . . . . . . . . . . . . . . . . . . . .   2
   3.  Common data plane across domains and across overlay/underlay    3
   4.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   5.  SRv6 mobile user plane and the 5G use cases . . . . . . . . .   4
     5.1.  Network Slicing . . . . . . . . . . . . . . . . . . . . .   4
     5.2.  Edge Computing  . . . . . . . . . . . . . . . . . . . . .   5
     5.3.  URLLC (Ultra-Reliable Low-Latency Communication) support    6
   6.  Control Plane Considerations  . . . . . . . . . . . . . . . .   7
   7.  Incremental Deployment  . . . . . . . . . . . . . . . . . . .   7
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     11.1.  Normative References . . . . . . . . . . . . . . . . . .   8
     11.2.  Informative References . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   Mobile architectures have evolved individually, and the user plane,
   GTP-U, has been defined as an overlay tunnel that is agnostic to the
   IP infrastructure.

   However, it will not be able to efficiently meet the diverse SLA
   requirements of the 5G era.  Also, it will not be able to meet the
   demands of new mobile first and/or data intensive applications.

   This document discusses a solution approach and its architectural
   benefits of common data plane across domains (e.g., mobile including
   UE, IP transport, data center, applications) and across overlay/
   underlay.

   This approach is in a sense contrary to proposals that the underlying
   transport can be anything (L2, IPv4, IPv6, MPLS, SR, SRv6).  But it
   is an approach to make the network as flat as possible, making it
   suitable for the distributed mobile deployment model.

2.  Problem Definition

   The current mobile user plane, GTP-U, defined as an overlay tunnel
   that is agnostic to the IP infrastructure, has the following
   limitations that prevent it from supporting new application demands.

   o  Non-optimal for any-to-any communication
   o  lack a way to map to the underlay

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   o  Non-optimal for edge/distributed computing
   o  Lack a way for application developers to manipulate
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