Enabling 5G network slicing over heterogeneous optical networks

Transcription

1 ONDM2017 Workshop - Optical networks for data centres in the 5G era 1 5G Crosshaul the integrated fronthaul/backhaul Enabling 5G network slicing oer heterogeneous optical networks ONDM2017 Workshop Ramon Casellas, Ricard Vilalta, Ricardo Martínez, and Raul Muñoz - CTTC/CERCA Communication s Diision, A. Carl Friedrich Gauss, 7, Castelldefels, Spain ramon.casellas@cttc.es CTTC 2017 All rights resered

2 Introduction: slicing as an emerging reuirement for 5G Slicing Macroscopic Concept: partition (slice) a single physical infrastructure into multiple irtual optimized according to specific serices, business models, etc.? s? Infrastructures? Functions? irtualization? Virtual Priate? ETSI NFV Serice? Definitions All can be seen as a particular cases. Next Generation Mobile s (NGMN) White Paper 3GPP TR V1.0.0 ( ) Study on management and orchestration of network slicing for next generation network (Release 14) a set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics. May be composed of subnets of Physical Functions and/or Virtualized Functions. Physical Functions and Virtualized Functions may belong to one or more network slice subnet(s). Research papers, White papers A logical construct encompassing multiple interconnected functions, customized and optimized for a serice (set) or ertical. ONDM2017 Workshop - Optical networks for data centres in the 5G era 2

3 5GPPP White paper (MWC2016) -centric serices Vertical-centric serices Serice #1 Satellite Mobile broadband Serices Serice #2 Vertical #1 Function Repository Serice #3 Serice #1 Vertical #2 Function Repository Vertical #1 Serices (e.g., Factory of the Future) Serice #2 Abstract resources: Wireless Serice #3 Edge Cloud Satellite Serice #1 Vertical #3 Function Repository Optical Vertical #2 Serices (e.g,, Automotie) Serice #2 Edge Cloud Serice #3 Function Repository Core Cloud Northbound Interfaces Southbound Interfaces Business Serice Layer Business Function Layer Multi-serice Layer Function Layer Infrastructure Layer RAN and wireless backhaul Optical Access Optical Metro Optical Core Source: 5GPPP White paper MWC2016: ONDM2017 Workshop - Optical networks for data centres in the 5G era 3

4 Slicing as a Serice Goal à To dynamically proide multiple, highly flexible, end-to-end dedicated network slices (considering irtual network, cloud and functions resources) oer the same physical infrastructure in order to delier ertical-specific reuirements, Management and Orchestration systems for slice life-cycle management. Slices can be created and operated by the 5G network operator or enable new business models, e.g. Slice-as-a-Serice. What about multi-tenancy? Related to the concept of ownership and/or use. Slicing is an enabler for flexible multi-tenancy. Ultimately empowering tenant to control allocated slice (recursiely) ONDM2017 Workshop - Optical networks for data centres in the 5G era 4

5 5G-Crosshaul project Defines a new generation of transport networks for 5G, integrating both fronthaul and backhaul segments into a common transport infrastructure. Conerged Fronthaul and Backhaul under common SDN/NFV-based control, capable of supporting new 5G RAN architectures (RAN) and performance reuirements. CF Common Frame capable of transporting the mixture of arious Fronthaul and backhaul traffic FE Forwarding for forwarding the Crosshaul traffic in the CF format under the CI control PU Processing Unit for executing irtualized network functions and/or centralized access protocol functions CI Infrastructure that is SDN-based and NFV-enabled for executing the orchestrator s resource allocation decisions ONDM2017 Workshop - Optical networks for data centres in the 5G era 5

6 5G-Crosshaul Slicing serice 1 VNF 2 VNF 1 VNF 3 serice 2 VNF 1 VNF 2 VNF 3 Serices offed by Tenant Z Multi-Tenancy Tenant Z SDN-based Tenant Y SDN-based PU PU Virtual Infrastructure 2 Virtual Infrastructure 3 PU Tenant SDN-based Virtual Infrastructure 1 PU FE FE FE FE FE FE PU 5G-Crosshaul Physical Resource FE FE

7 A potentially suitable framework for slicing: ETSI NFV What is s Function Virtualization (NFV)? In simple terms à a deployment model and concept around the idea of replacing dedicated network appliances such as routers and firewalls with software (guests) running on hosts Relies on the concept of host irtualization E.g. Hyperisors ETSI / NFVI architecture NFVI : NFV Infrastructure Used to support the instantiation of Virtual Machines (VMs) VIM: Virtualized Infrastructure Manager Manages and proides access to storage, network and computer resources (NFVI) MANO : Management and Orchestration Deals with the orchestration of Virtualized Functions and how to deploy them (within the so called Serices) Benefits Lower costs : replacing dedicated appliances with shared serers. Efficient resource usage Reduce operational costs with fewer appliances to deploy and maintain Support on-demand pay-as-you go deployment models Enable Innoation by making it easier to deelop network functions Deploy irtualized solutions on commercial, off-the-shelf (COTS) hardware ONDM2017 Workshop - Optical networks for data centres in the 5G era 7

8 A potentially suitable framework for slicing: ETSI NFV NFV-Orchestrator Or-Vi Or-Wi Or-Vi VIM VIM / WIM VIM Hyperisor Compute Hyperisor Compute NFVI-PoP NFVI-PoP NFVI node VM11 VM21 NFVI node NFVI node Hyperisor Virtual Soft Switch CPU /MEM NIC Compute NFVI domain NFVI domain ONDM2017 Workshop - Optical networks for data centres in the 5G era 8

9 A potentially suitable framework for slicing: ETSI NFV Main focus is the Serice does not coer all use cases. VIM Hyperisor NFV-Orchestrator Compute Or-Vi VIM / WIM Or-Wi Underspecified : focused to proision paths between VNFs in VNF-FG Or-Vi Not adapted for irtual VIM infrastructures use cases Hyperisor Compute Too much abstracted NFVI-PoP Very rigid. NFVI-PoP NFVI node VM11 VM21 Not easy to integrate optical network control focused on L2/L3 management NFVI (e.g OpenStack Neutron node ML2) NFVI node Hyperisor CPU /MEM Virtual Soft Switch NIC Compute NFVI domain ONDM2017 Workshop - Optical networks for data centres in the 5G era NFVI domain 9

10 5G-Crosshaul Slicing: Extending the NFV framework Virtual Infrastructure Allocation / Modification / Deallocation API Offer irtual infrastructure serices (lower-leel) Operator or Tenant VI allocation VI description (data model) Tenant Applications Tenant VI operation Virtual Infrastructure API (Limited form) (a) (b) (c) 5G Crosshaul MANO (CI) Tenant VI operation (recursion) Virtual Infrastructure CI-based API (Enables recursion) Multi Tenant Application (MTA) Northbound Interface (NBI) NFV orchestrator 5G Crosshaul MANO (CI) (d) Operator or Tenant NS allocation NS Descriptor VNF Descriptors VNF-FG Descriptor. Ensure support for Multi-Tenancy ETSI NS Allocation / Modification / Deallocation API VNF VNF Manager( Manager( s) s) s) Virtual Infrastructure Manager (VIM) Non-Crosshaul interface Crosshaul interface SDN ctrl Plugin 2 Plugin 1 Plugin n Storage ctrl Plugin 1 Plugin 2 Plugin n Computing ctrl Plugin 2 Plugin 1 Plugin n Plane Southbound Interface (SBI) Data Plane Non-FE/PU Legacy Crosshaul Transport Nodes (λ/time switch, (switch, BBU, mmwae ) NFVI / VNFs BBU, BBU, ) ) Virtualization layer Hardware Crosshaul Crosshaul Forwarding Forwarding (FE) (FE) AF Crosshaul Crosshaul Processor Processor Unit Unit (PU) (PU) Non-CF Frame Interface Crosshaul Common Frame (CF) Interface PHY / Link layer PHY / Link layer. Li, R. Casellas, G. Landi, A. de la Olia,. Costa-Pérez, A. Garcia-Saaedra,T. Deiß, L. Cominardi, R. Vilalta, 5G-Crosshaul Slicing: Enabling Multi-Tenancy in Mobile Transport s, accepted for publication IEEE Communications Magazine, 2017

11 Realistic T-SDN/NFV integration Beyond NFVO Offer Slicing serices in addition to ETSI/NFV NS. Natiely support network irtualization and multi-tenancy. VIM Compute Hyperisor SDN Orchestrator NFVI-PoP Orchestrator SDN ler, AS-PCE, NFVI-PoP ETSI NFV Hyperisor Compute NFVI node CPU /MEM NIC Child ler Child ler ETSI NFV PCEP PCC Netconf, Mgmt NFVI node CPU /MEM NIC ONDM2017 Workshop - Optical networks for data centres in the 5G era 11

12 Orchestration and Oerarching Oerarching control coordination and orchestration functions Uniform Resource identification Multi-domain Abstracted Topology and Connection database Cooperatie routing, spectrum assignment and coordinated path proisioning Topology Abstraction Adaptation Topology Abstraction Adaptation Topology Abstraction Adaptation 1 Local TED and Connection DB 2 Local TED and Connection DB N Local TED and Connection DB ONDM2017 Workshop - Optical networks for data centres in the 5G era 12

13 Generic Orchestration Hybrid models, ery heterogeneous in terms of protocols and interfaces ( Segment, Administratie, ) (Multi-Layer) Orchestrator PCEP AS-PCE GMPLS ler Sub-s (Vendor Segmentation ) OpenFlow, Netconf REST, Vendor1 ler Orchestrator Vendor2 ler Peer Model (Multi-Layer) Orchestrator Layer H ler Hierarchical Layer L Child ler Layer L Parent ler Multi-Layer Orchestration Layer L Child ler HIERARCHY LEVEL ABSTRACTION CONTROL PLANE Layer H Data Plane Link DATA PLANE Data Plane Layer H Data Plane Layer L Layer L domain1 Layer L domain2 OFC 2017 SC448 Monday, 20 March 2017 Introduction to and Management of Optical s 13

14 Slicing oer Multi-domain flexi-grid networks: ACTN Tenant / Sl i ce Manager Management & Orchestration Tenant / SLice Allocation REST API Topology Monitoring REST API Virtualization and abstraction Proisioning Virtualization and abstraction LSPDB Proisioning PNC TED PCEP Topology Management MD LSPDB MDSC MDSC MD TED Topology Management Hyperisor Abstraction and Virtualization PCEP Actie Stateful Capabilities for proisioning and Link State for Topology abstraction and management Virtualization and abstraction Proisioning LSPDB PNC TED Topology Management Applications Applications Client/ Tenant Applications CNC (Tenant 1) CNC / SC (Tenant 2) Tenant of Allocated slices Applications Applications Client/ Tenant Applications CNC-2.1 Stackable CNC-2.2 PCC PCC PCC PCC GMPLS ler OSPF-TE RSVP-TE GMPLS ler GMPLS ler OSPF-TE RSVP-TE GMPLS ler ROADM CCI ROADM CCI ROADM CCI ROADM CCI Underlying physical network infrastructure Data & Plane ( 1) Underlying physical network infrastructure Data & Plane ( 2) ONDM2017 Workshop - Optical networks for data centres in the 5G era 14

15 Slicing oer Multi-domain flexi-grid networks: experimental ONDM2017 Workshop - Optical networks for data centres in the 5G era 15

16 Example with 2 tenants/slices. ONDM2017 Workshop - Optical networks for data centres in the 5G era 16

17 Example: dynamic instantiation of CNC Tenant Manager GUI ( ) OpenStack Keystone/Noa REST API Tenant 1 AS-PCE Tenant REST API ( ) Slice TED Slice LSPDB 2 3 BGP-LS or PCEPLS AS-PCE ( TED LSPDB ) PCEP 1 Hyperisor lo-pce hi-pce Tenant 1 hi-pce hi-pce TED LSPDB Noa ler Compute node Tenant 1 App/NMS Proisioning & Topology REST API OSPF-TE RSVP-TE ( ) ( ) ONDM2017 Workshop - Optical networks for data centres in the 5G era 17

18 Conclusions Slicing as an emerging reuirement for 5G networks; a slice is a logical construct inoling functions and their interconnection, tailored for serices and erticals. The concept somehow generalizes ETSI serices, irtual networks, VPNs, etc. The ETSI NFV framework, allowing the instantiation of Serices, proides a platform to support network slicing, complemented with a Slice Manager or Multi-Tenancy Application Does not fully coer all use cases, specially when partitioning the physical network, allowing ultimate SDN control oer the irtual infrastructure Integrating optical transport networks and generalizing the slicing concept reuires a finer joint orchestration of network and IT resources, with improed isibility of the optical network and its control and management. In particular, we considered the actual partitioning of a multi-domain flexi-grid optical network and how the IETF ACTN and hierarchical Actie-Stateful PCE support the concept. ONDM2017 Workshop - Optical networks for data centres in the 5G era 18

19 Thank you! Questions? This work has been partially funded by the European Commission through the H2020-ICT project 5G-Crosshaul (671598) and the Spanish Ministry MINECO project DESTELLO (TEC R). ONDM2017 Workshop - Optical networks for data centres in the 5G era 19