Interconnecting (or Stitching) Network Slice Subnets
draft-defoy-coms-subnet-interconnection-02

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none                                                           X. de Foy
Internet-Draft                                                 A. Rahman
Intended status: Informational                         InterDigital Inc.
Expires: August 3, 2018                                         A. Galis
                                               University College London
                                                            K. Makhijani
                                                                L. Qiang
                                                     Huawei Technologies
                                                                S. Homma
                                                                     NTT
                                                        January 30, 2018

          Interconnecting (or Stitching) Network Slice Subnets
               draft-defoy-coms-subnet-interconnection-02

Abstract

   This document aims to define the network slice subnet as a general
   concept, and to augment a baseline network slice model with
   attributes and operations related to interconnections between network
   slice subnets.

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de Foy, et al.           Expires August 3, 2018                 [Page 1]
Internet-Draft               Network slicing                January 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Usage of NS Subnets . . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   5
   2.  Information Model . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Base Information Model  . . . . . . . . . . . . . . . . .   5
     2.2.  Interconnection Anchors . . . . . . . . . . . . . . . . .   6
     2.3.  Interconnection Instances . . . . . . . . . . . . . . . .   8
     2.4.  Stitching Operation . . . . . . . . . . . . . . . . . . .   9
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   5.  Informative References  . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   Network Slicing enables deployment and management of services with
   diverse requirements on end-to-end partitioned virtual networks over
   the same infrastructure, including networking, compute and storage
   resources.  [I-D.geng-coms-problem-statement] describes a problem
   statement for supervised heterogeneous network slicing, enabling
   users to deploy network slices including connectivity, computing and
   storage components.

   A resource-aware information model is currently being defined in
   [I-D.qiang-coms-netslicing-information-model] to represent network
   slices.  Nevertheless, defining and managing a network slice (NS)
   end-to-end does not always have to be done directly.  It may be
   convenient to define and manage separately subsets of an end-to-end
   slice.  The concept of network slice subnet is defined originally in
   [NGMN_Network_Slicing] for 5G, though we only need to retain its
   definition in the most universal form: network slice subnets are
   similar to network slices in most ways but cannot be operated in
   isolation as a complete network slice.  They can however be
   interconnected with other NS subnets to form a complete, end-to-end
   network slice (i.e. interconnection and/or stitching of NS subnets).
   To summarize: a NS subnet can be seen as a network slice with
   unconnected links.  The term "network slice segment" has also
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