Use Cases and Requirements for Dynamic Slice Stitching
draft-sijeon-nfvrg-slice-stitching-00

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NFVRG                                                            S. Jeon
Internet-Draft                                                    Y. Kim
Intended status: Informational                       Soongsil University
Expires: January 4, 2019                                    July 3, 2018

         Use Cases and Requirements for Dynamic Slice Stitching
               draft-sijeon-nfvrg-slice-stitching-00.txt

Abstract

   This document describes use cases and requirements for dynamic slice
   stitching.

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Table of Contents

   1.  Overview and Use Cases  . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements for Dynamic Slice Stitching  . . . . . . . . . .   5
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  Informative References  . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Overview and Use Cases

   Network slicing means that a communication network is divided into
   multiple, logical end-to-end networks (slices), all sharing the same
   physical network infrastructure [_3GPP.23.501].  Multiple services
   belonging to different service categories such as eMBB, massive IoT,
   mission-critical IoT can be supported by different slices.  Network
   slicing does not remain multiple services support with virtualization
   effect but the potential is with beyond regional domain boundary for
   global vertical industry service.

   A vertical industry service may remain in a single operator domain or
   require multiple domains operated by the same network/service
   providers.  In the multiple domain scenario, network slices created
   from each domain should be federated and associated.  We call it
   'slice stitching'.  In the design phase, slice stitching can be
   treated and handled by network slice description that defines overall
   characteristics of the network slice with types of service function,
   link connectivity between network functions, resource of each service
   function and link, etc.

   The need of slice stitching could be found in load balancing,
   differentiated WAN services with more bandwidth and advanced
   middlebox support, security-enhanced purpose on demand, which can be
   provided by dynamic instantiation of a new slice and interconnection
   among the existing ones.  In addition, one very interesting use case
   can be found in providing virtualized home domain service support
   with low latency in a visited roaming domian.  The dynamic slice
   stitching can be illustrated and explained by high-level operations
   in Figs. 1 and 2. (a), (b), (c) in Figs. 1 and 2 denote the order of
   the operations in each figure.

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         ==========                                      ==========
        =          =                                    =          =
    -- =      A     = -------------------------------- =      B     = --
        =          =                                    =          =
         ==========                                      ==========

                     (a) Slices A and B interconnected

         ==========                                      ==========
        =          =                                    =          =
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