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0 2016 SK Telecom Confidential

5G World Summit

30th June, 2016

Keunhyun Kim Network Technology R&D Center, SK Telecom


Contents

Ⅰ. Overview

Ⅱ. SK Telecom’s NFV/SDN Evolutions

Commercial NFV/SDN Experiences

Lesson Learned & Visions

Ⅲ. SK telecom’s journey towards 5G begins

Ⅳ. Conclusion

Re-architecting Principles for 5G

5G End-to-end Architectures & Enabling Technologies


SK Telecom at Glance

4G/LTE markets and technologies have already matured in Korean market.

SK Telecom has always been the first-mover in mobile network evolution

4G/LTE evolution by SK Telecom

300Mbps 225Mbps

150Mbps

75Mbps 75Mbps

LTE Multi-

Carrier

LTE-A LTE-A

LTE-A

Tri-Band

CA

Market share

49.8%

SK Telecom

LTE Data Usage

4.4GB

per user/month

2011.7 2012.7 2013.6 2014.6 2014.12

World’s first

commercialization

Top 8 countries by

LTE penetration

Korea, South

Japan

Singapore

Sweden

USA

Demark

Norway

Australia

80.24%

24%

Source: GSMA Intelligence 2015.3Q

77.54%

73.68%

69.68%

55.76%

55.04%

62.96%

53.27%


Challenges in Today’s Mobile Network

Aggressive and continuous network expansion and architectural changes leads to

heterogeneous and complex network that is expensive and difficult to manage

Diverse traffic (time/place/event)

Closed & proprietary HW

New and diverse devices with IoT

High upgrade costs

Inefficient utilization of network resources

Inability to customize for various customers

Mobile infrastructure needs re-architecting


NFV/SDN Evolutions in SKT – Experiences (1/2)

SK Telecom has been trying to apply NFV/SDN technologies in our overall networks

for TCO reduction, fast-TTM, greater scalability and value creation.

Access N/W Transport N/W (Backhaul)

NFV T-SDN NFV SDN, T-SDN

Transport N/W (IP Backbone)

Core N/W

vRAN Field Test (`15.11 ) Commercial T-SDN (`15.12) Commercial IoT vEPC (‘15.8)

Commercial NFVO (‘15.8)

Commercial vIMS (‘15.9)

SDN based vEPC PoC (‘15.11)

Service Orchestrator PoC (‘15.11)


• Commercial vIMS (Sep. 2015~)

- vCSCF, vSBC, and vTAS are deployed

- The NFV adoption is still in progress

• Commercial vEPC for IoT (Aug. 2015~)

- Both vMME and vSAEGW for IoT service

are deployed

- Call-processing VMs are auto-scalable

- vEPC for B2C is being developed

NFV/SDN Evolutions in SKT – Experiences (2/2)

Rapidly and flexibly responding to increased LTE data and voice traffic,

both vEPC and vIMS have been successfully commercialized with NFV Orchestrator

T-OVEN

NFV Orchestrator & Portal

VNFs

Multi-vendor/Heterogeneous NFV Infra

NS Catalog

VNF Catalog Policy

Resource Catalog

Vendor A

VNFM

Vendor A

VIM

Vendor A

Virtual Resource

Linux KVM

COTS H/W

Vendor B

VIM

Vendor B

VNFM

Vendor B

Virtual Resource

Linux KVM

COTS H/W Vendor C

VIM

Vendor C

VNFM

Vendor C

Virtual Resource

VMware

COTS H/W

SKT vVAS

vCDN

SKT vVAS

‘’’

PNFs

EPC

IMS

VAS

Multi-VNFM

Multi-VIM

Vendor B

vTAS

Vendor A

vCSCF

Vendor A

vSBC

Vendor A

vMME

Vendor A

vS/P-GW

Vendor B

vMSS

vEPC

vIMS

1

2

3

2

* Winner of ‘vIMS Solution & Use Case of the Year’ at ‘IMS

industry Awards 2016’ held in Amsterdam (‘16,5)

• Commercial NFV Orchestrator (Aug. 2015~)

- Using SKT’s de-facto MANO spec., NFVO

manages heterogeneous VNFs, VNFMs, and

VIMs from different vendors

1

3

* ETSI NFV PoC#23: E2E orchestration of virtualized LTE core-

network functions and SDN-based dynamic service chaining of

VNFs using VNF-FG


NFV/SDN Evolutions in SKT - Lessons learned

Virtualizing Telco N/W is definitely work well !

• Both NFV and SDN can potentially be the solution for operators to transform their

networks in a cost-effective way for TCO reduction (20%↓), service agility (3 Months 2~4 weeks )

Re-design of Telco workload as a “cloud-friendly” workload is essential

It is a real paradigm shift and cultural shock in the whole operating process

6

• VNF shall be decomposed into LB, control/user plane, DB and so one, so that each component is

independently scalable

• ‘Stateless-design’ is crucial for all-active HA and VNF portability(migration)

Efficient NFV MANO implementation is needed

• Avoid vendor & domain-specific MANO. It can lead to next generation lock-in on large vendors

• Accommodate telco-specific life-cycle mgmt. requirements(e.g., backup, rollback)

• For fully automated orchestration, standard data models should be agreed

Open H/W and S/W will play a crucial role in maximizing TCO gains


Telco service

UHD & Hologram

Massive IoT

Mission- Critical IoT

Network slices

Telco/IT functions

Virtualization

O&

M

Low-cost

small cell

Massive MIMO

f1

Unlicensed,

Millimeter-wave

f2 fn …

fm

New waveform Cloud-RAN

Cloud

Core

Orc

he

stra

tion

Cloud-RAN

Telco API

Unified

Transport

SK telecom’s journey towards 5G begins

A common 5G architecture needs to support various 5G use cases with diverse

requirements

Hyper-connected radio

Innovative Services

for value creation,

monetization

All-IT Infrastructure

for efficiency and

flexibility

for massive and multi-Gbps

connectivity


4 Basic Principles

Re-architecting the 5G Networks: How?

“Unbundling”

“Open”

“Softwarization” “Cloudification”

Software/Hardware Decoupling

Unbundled Function Blocks

Control-/User-plane Separation

Open Source Software (OpenStack, ONOS)

Open Hardware (OCP, TIP)

Open Interface (Fronthaul, API)

NFV (Network Functions Virtualization)

SDN (Software Defined Networking)

Orchestration & Network Slicing (XaaS)

Cloud-based “All IT” Infra

SDN-enabled Fabric

Re-architecting as a Data Center


5G End-to-end Architecture

E2E orchestrator connects access, transport, and core networks, and provides

managements of services in the aspect of the end-to-end connection

HW Infra

Virtualization layer

Virtualized NW functions

Access CP

Access UP HW

Dist. Core

Mgmt., Analytics

SDRAN Orchestration

HW Infra

Virtualization layer

Virtualized NW functions

Core CP

Core VAS

Mgmt., Analytics

Core Orchestration Transport SDN

Intelligent E2E Orchestration and Service Exposure (Open API)

Virtualized network slice #1

Media

Telco Service

Low Latency Service

Virtualized network slice #1

Access UP HW

RF

Remote Unit (RU)

Mobile Edge

Core Cloud

Fronthaul

Backhaul

HW Infra

POTN Transport Open HW

#2

Open & Programmable HW

#n

Open Fronthaul

CP-UP Separation

Open HW, SW, API

MEC

Analytics framework

Network Slicing

Open & Programmable HW

Access CP HW

End-to-end Orchestration

mmWave

All IT Infrastructure

Massive MIMO


5G key enabling technologies: All IT Infrastructure

All infrastructure of both Telco network and IT Data Center are all integrated into SDDC.

The SDDC environment will be programmed and orchestrated by intelligent orchestrator.

Te

lco

Ne

two

rk

IT D

ata

Ce

nte

r

2G & 3G

3G Data

2G/3G Voice

WCDMA

CDMA

4G LTE 5G

LTE

IP

All-IP

Siloed Data Center

Cloud Data

Center

Server

OS

APP

Server

OS

APP

Server

OS

APP

Server

Hypervisor

OS

APP

OS

APP

OS

APP

OS

APP

OS

APP

VoLTE

3G Voice

SDN, NFV, Programmable Infra. (Rack-Scale Architecture) Open H/W, S/W based

SDDC

Virtualized

N/W functions

Cloud RAN Cloud Core

Virtualized

N/W functions

E2E

Control

S/W defined Infra


5G key enabling technologies: Open H/W, S/W

Open H/W and S/W will play a crucial role in maximizing TCO gains,

The role of the operator is important to the technology integration

Compute Storage Network

Hardware Resource

Virtualization Layer

Virtual Computing Virtual Storage Virtual Networking

NFV Infrastructure (NFVI)

VNF VNF VNF VNF VNF VNF

Virtualized Network Functions (VNFs)

Virtual

Infrastructure

Manager

(VIM)

VNF

Manager

(VNFM)

Orchestrator

MANO

LTE as a Service 5G Service

Network Service

NFV Functional Overview

EMS EMS EMS EMS EMS EMS

`16.3.10

`16.2.23

`16.2.21

`15.2.11

`15.2.04

`16.1.28


5G key enabling technologies: Network Slicing

Physical Infra (General-Purpose H/W

)

EPC#1 LTE

DATA

EPC#2

Internet

APN based N/W Slicing

lte.sktelelom.com

ims.sktelelom.com

SDN

NFV

Mgmt. &

Orchestration

VoLTE

EPC#1 SKT User

EPC#2

Internet

PLMN based N/W Slicing

450 05

310 010 IB Roamer

Compute Storage Network

Virtualized Network Functions

RAN

Functions

CN

Functions Value-Add

Services

End-to-end Network Service

Network Slice for

Multi-Media Service

Network Slice for

Mission-Critical IoT

Network Slice for

Enterprise Solution

Voice / SMS

DPI Firewall/

IDS

N/W Slicing is novel network architectures for creation and isolation of virtualized

networks on as-a-service basis to support diverse future services

[ As-Is ] [ To-Be ]


5G key enabling technologies: CP-UP Separation

Mobile Edge

Core Network

S/P-GW

Mobile Edge

Core Network

GW-C

S/P-GW EPC

Service Service Service

GW-U

GW-U

All traffics are concentrated in the central EPC GW

GW-U

SDN

Controller

Service

Service

Service

GW-C: EPC Gateway Control Plane, GW-U: EPC Gateway User Plane

By enabling the CP/UP-split EPC architecture, operators can deliver value in the face of

ever increasing traffic and a wide variety of traffic pattern

Each traffic can be dynamically distributed in

the mobile edge or core network

Higher Performance & Scalability, Lower Latency & TCO

[ Today’s EPC ] [ Decoupled & Distributed EPC ]


5G key enabling technologies: End-to-end Orchestration (1/2)

End-to-end Network Orchestration

End-to-end Network Slice

Life Cycle Mgmt.

Service Orchestration

ROADM(L0) OTN(L1)

POTN(L1-2) PTN(L2)

IP/MPLS(L3)

Common VIM

BSS

Generic

VNFM

Virtualized Functions Edge

Functions Core Functions

Physical / Virtual Infra.

Edge DC Central DC

OSS/BSS Interconnection

Vendor-

Specific VNFM

Transport Infra. Orchestrator

Service Life Cycle Mgmt. Service Exposure

(Open API) Service Adaptation

(PCRF/U.Key I/F, Design Portal)

Local NFV Orchestrator Local NFV Orchestrator Local NFV Orchestrator

Resource

Network (Network Slice)

Service (Product)

Order

Scope

‘Service’ Life Cycle Mgmt.

‘Service Slicing’

‘Network Slice’ Life Cycle Mgmt.

‘Network Slicing’

Compute / Storage / Network

‘Order’ Life Cycle Mgmt.

Customer Mgmt., Sales & Marketing, Billing

Function Blocks

OS

S

(Inve

nto

ry M

gm

t., Data

Co

llectio

n, A

na

lytic

s, E

ve

nt H

an

dlin

g)

E2E network orchestration provides the overall managements and connectivity of

end-to-end network including access, transport, core networks.

Based on that, service orchestration provides logical network optimized for a wide

range of customers according to the customer’s presence, time, location and situation


5G key enabling technologies: End-to-end Orchestration (2/2)

vVAS vEPC vIMS

Virtualized Network Functions

Compute

Storage Network

Virtualized Resources

+

• NFV Mgmt. & Orchestration

- VNF Catalog

- Virtual Resource Catalog

End-to-end Network Slices

Resource Network Slice

• E2E Network Slice

Design & Deployment

- E2E Network Slice Catalog

Network Slice B2C LTE

Network Slice IoT LTE

Network Slice PS-LTE

Service Slices

Service Slice (Product)

• Service Slice (Product)

Design & Life-Cycle Mgmt.

- Service (Product) Catalog

Service Slice Unlimited Plan

Service Slice Quota Exceeded

Service Slice Promotion Targeted


Conclusion

• NFV/SDN is not just developing a new technology. It is a real paradigm shift in

engineering/operating process towards 5G network. Brave-frontier or Smart-

follower is up to operator’s choice

• 5G network should be “Simple”, “Cognitive”, “Automated”, “Lean”, “End-to-End”

Scalable • Efficient Resource

Utilization • On-demand • Adaptive

Lean • Open Source HW/SW • Open Interface • Modularized • Standardized

Automated • Intelligent Operations • Self-configuration • Self-optimization

ATSCALE

Scalable, Cognitive, Automated, Lean, End-to-End

End-to-End • E2E Analytics • E2E Optimization • E2E Orchestration

Cognitive • E2E Network Visibility • Real-time Analytics • Policy-based Optimal

Decisions


Thank you

For further questions and comments,

please send email to [email protected]

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