On Multi-domain Network Slicing Orchestration Architecture & Federated Resource Control

TL;DR

This paper proposes a multi-domain network slicing architecture that integrates SDN and NFV to enable efficient, flexible, and technology-agnostic orchestration of network slices across multiple administrative domains.

Contribution

It introduces a novel multi-layered orchestration architecture that extends traditional network management to support federated slices with SDN and NFV integration.

Findings

Defines a four-layer architecture for multi-domain slicing

Details operational procedures for federated slice management

Demonstrates the architecture's ability to support multi-domain orchestration

Abstract

A sophisticated and efficient network slicing architecture is needed to support the orchestration of network slices across multiple administrative domains. Such multi-domain architecture shall be agnostic of the underlying virtualization and network infrastructure technologies. Its objective is to extend the traditional orchestration, management and control capabilities by means of models and constructs in order to form a well-stitched composition of network slices. To facilitate such composition of networking and compute/storage resources, this paper introduces a management and orchestration architecture that incorporates Software Defined Networking (SDN) and Network Function Virtualization (NFV) components to the basic 3GPP network slice management. The proposed architecture is broadly divided into four major strata, namely Multi-domain Service Conductor Stratum, Domain-specific Fully-Fledged Orchestration Stratum, Sub-Domain Management and Orchestration (MANO) and Connectivity Stratum, and Logical Multidomain Slice Instance stratum. Each of these strata is described in detail providing also the fundamental operational specifics for instantiating and managing the resulting federated network slices.