Interconnecting Network Slice Subnets
draft-defoy-coms-subnet-interconnection-00

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none                                                           X. de Foy
Internet-Draft                                                 A. Rahman
Intended status: Informational                         InterDigital Inc.
Expires: April 6, 2018                                   October 3, 2017

                 Interconnecting Network Slice Subnets
               draft-defoy-coms-subnet-interconnection-00

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 & Rahman           Expires April 6, 2018                 [Page 1]
Internet-Draft               Network slicing                October 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Interconnection Concepts  . . . . . . . . . . . . . . . . . .   3
   3.  Information Model . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Operations  . . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  Next Steps  . . . . . . . . . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   8.  Informative References  . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   Network Slicing enables creating end-to-end partitioned virtual
   networks, including compute and storage resources, to deploy services
   with diverse requirements 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 general form:
   network slice subnet instances are comprised of network, compute and
   storage resources, but cannot be operated in isolation as a complete
   network slice.  They must be interconnected with other NS subnets to
   form a complete, end-to-end network slice.  To summarize: a NS subnet
   can be seen as a network slice with unconnected links.  The term
   network slice segments has also occasionally been used to designate
   NS subnets.  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.

   A model for network slicing is currently being defined in
   [I-D.qiang-coms-netslicing-information-model].  One question we would
   like to address is how to augment this base model to describe
   interconnections between NS subnets.  The base model is not
   technology specific, and therefore the description of
   interconnections should not be either.  Moreover, such an
   augmentation should both enable describing the intent for
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