Interconnecting (or Stitching) Network Slice Subnets
draft-defoy-coms-subnet-interconnection-01

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none                                                           X. de Foy
Internet-Draft                                                 A. Rahman
Intended status: Informational                         InterDigital Inc.
Expires: May 3, 2018                                            A. Galis
                                               University College London
                                                            K. Makhijani
                                                                L. Qiang
                                                     Huawei Technologies
                                                        October 30, 2017

          Interconnecting (or Stitching) Network Slice Subnets
               draft-defoy-coms-subnet-interconnection-01

Abstract

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

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de Foy, et al.             Expires May 3, 2018                  [Page 1]
Internet-Draft               Network slicing                October 2017

   to this document.  Code Components extracted from this document must
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Interconnection Concepts  . . . . . . . . . . . . . . . . . .   3
   3.  Information Model . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Representing Interconnections . . . . . . . . . . . . . .   5
     3.2.  Relation to NS Information Model  . . . . . . . . . . . .   5
   4.  Operations  . . . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   6.  Next Steps  . . . . . . . . . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   8.  Informative References  . . . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   Network Slicing enables deployment and management of services with
   diverse requirements on end-to-end partitioned virtual networks,
   including compute and storage resources, over the same
   infrastructure.  [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.

   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 subsets of NS components.  The concept of network
   slice subnet is defined originally in [NGMN_Network_Slicing], though
   we only need to retain its definition in the most universal form:
   network slice subnet instances are similar to slice instances in most
   ways but cannot be operated in isolation as a complete network slice.
   They can 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
   occasionally been used to designate a NS subnet.  Use cases for using
   NS subnets include managing multi-domain network slices, or even
   within one domain, isolate management and maintenance of different
   portions of a network slice.  It includes also mapping services to an
   ordered chain of network slice subnets instances.
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