Gateway Function for Network Slicing I-D.homma-nfvrg-slice-gateway-00

Transcription

1 Gateway Function for Network Slicing I-D.homma-nfvrg-slice-gateway-00 Shunsuke Homma NTT Xavier De Foy InterDigital Inc. Alex Galis University College London 1

2 Purpose of Slice Gateway (SLG) To define capabilities of data-plane for network slicing (e.g., QoS control, transform encaps, etc.) with interaction with the management plane. To provide data-plane functionalities for providing E2E slices across multiple heterogeneous domains. 2

3 Overview of Network Slicing Network slice (NS) is a logical network deployed based on service requirements. NS enables 3 rd parties to use network resources as a part of their own services. Connected Vehicles External tenants (e.g., 3 rd Parties) IoT/M2M Devices Low Latency Network Network for IoT/M2M Have different requirements for networks Physical Network 3

4 NS Lifecycle Network slice (NS) are deployed depending on the following flow. Tenants Service Requirements Change/delete Request NS Provider /NW Operator Network/Service Design Network Configurations enforce Network/Server Resources Orchestrated /Automated 4

5 Overview of NS System Framework NS are automatically deployed on physical network resources by NS orchestrator(nso). NSO converts service requirements from tenants to network configuration. NS are instantiated dynamically with SDN/NFV technologies. NS Tenant Customer Service Interface (CSI) NS Provider Service Delivery Interface (SDI) NS Orchestrator (NSO) SDI NSO Network Configuration Model Controller A Controller B Device Configuration Model Underlying Network Resources/Functions IRTF102@Montreal 5

6 Overview of Network Slicing in NFV Management & Orchestration plane OSS/NM EM EM Network slice-specific (dedicated) management layer functions E2E Service Management & Orchestration Manager Manager Slice Slice Manger Manger Slice Manger NFV Orchestrator VIM VIM Slice as a union of subsets of resources & NFVs Control plane Network slice-specific (dedicated) control layer layer functions Network slice-specific (dedicated) control layer functions Data plane Network slice-specific (dedicated) data layer functions IRTF102@Montreal 6

7 E2E Network Slicing Concept NS is required to provide specific quality from end to end. NS is composed of subnets which deployed in each domain. Orchestration across Domains Orchestrator for integrating multi-domains is required Operation Layer Orch. Orch. Orch. Orch. Virtual Network (Slice)Layer subnet subnet subnet Physical Network Layer subnet subnet subnet E2E-NSs are composed of NSsubnets established in each domain 7

8 Challenges on E2E Network Slicing Challenges on E2E network slicing are described below. In addition to operation aspects, some data-plane functionalities would be required to handle traffic. Management of Resources Tenants (3 rd Parties) E2E-Orch. Information Model Synchronization of Domains Slice Selection Administrative Domain#A # Interconnection between subnets Administrative Domain#B Isolation among Slices IRTF102@Montreal 8

9 Slice Gateway Slice Gateway (SLG) provides data plane functionalities for NS. Some SLG would be deployed as. Tenant OSS/BSS Administrative Domain#A Orchestrator E2E-Orchestrator Administrative Domain#B Orchestrator Ctrl Ctrl Ctrl UE SLG Access Network SLG SLG SLG Core Network Data Center Server SLG SLG creates slice subnets with virtual links and connects domains 9

10 Requirements for SLG/Data-plane SLG would be required to provides functionalities in terms of the following two aspects: Handling underlay infrastructure Control services on NS Handling underlay infrastructure Control services on NS On Data-Plane Classification Forwarding Isolation ü QoS control per NS ü Traffic Engineering Service Chaining Classification QoS control per flow Steering/Service Chaining On Control/Management-Plane IF to controller/orchestrator Address resolution/routing AAA OAM IF to service management system Telemetry collection 10

11 Conclusion For deploying appropriate E2E-NSs based on service requirements, definition of functionalities on data-plane would be required. SLG enables to provide E2E slices across multiple heterogeneous domains. 11

12 Next Step Feedback would be appreciated. Breakdown the requirements to concrete functionalities. A dedicated group would be required for discussing and standardizing aspects of network slicing in IETF/ IRTF (i.e. a dedicated BoF planed for IETF 103). IRTF102@Montreal 12