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Building a Next Generation Mobile Network using Open Technologies

Kang-Won Lee (kangwon@sk.com) SVP of R&D, Network and IT Convergence

March 16, 2016

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So far …

▪ Open networking technologies (SDN, NFV) have focused on fixed networks

▪ But, the future of networking is mobile!

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Future is now in Korea

66.0%

LTE Penetration Mobile Users

19GB

Expected Data Usage Per User Per Month (2020)

3.7GB

Avg. LTE Data Usage Per User Per Month 131PB

Mobile Data Traffic Per Month

> 100% of Population

2015 2020Source: Cisco VNI Mobile Forecast 2015-2020

650PB

5x

CAGR: 38%

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A brief history of mobile network

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Next generation mobile network – 5G

Customer Experience Enhancement

New Business Opportunity

Efficient and Intelligent Operation

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5G Applications

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And..

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Transforming into a platform company

Mobile Network as a “platform” on which various services such as telco service, media, IoT, etc. can run

x86 Commodity H/W

SDDCSD RAN SD Core

Enterprise

E2E Orchestration & Intelligence

Virtual Infra Management

Health Care, Transportation

IoT, Industry

Media, Entertainment

Telco ServiceT-Phone (spam guard, yellow page search) Smart SMS, etc.

B-tv mobile, Oksusu

Busan Smart City Pilot

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How to make it work?

▪ Leverage open hardware and software for TCO reduction and flexibility

▪ Simplify network design & management, enable automation

▪ Collaborate with new partners

▪ Move fast: prototype, try, fail, repeat until success

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SKT’s efforts

▪ Collaboration with open source organizations – ONOS, CORD, OpenStack, OCP, etc.

▪ Collaboration with vendors, service providers, OTTs – datacenter, SDN, operations, etc.

▪ Development of new hardware – all flash media server, server switch, JBOF

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ONOS contribution: SONASONA: the optimized multi-tenant network virtualization solution for data center

● Emu: SONA L2

● Falcon: SONA L3

● Goldeneye: Scalable G/W

Gateway

OVS-DPDK

Gateway

OVS-DPDK

C-Node

OVS

VM VM

C-Node

OVS

VM VM

C-Node

OVS

VM VM

C-Node

OVS

VM VM

Gateway

OVS-DPDK

OpenFlow/OVSDB

Internet

…

SONANeutronAPI

REST Handler

Initial Prep.

L2 Switching

L3 Routing

ARP/DHCP

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ONOS contribution: CORD-VTNCORD-VTN: virtual network management solution for CORD

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Open Control

Interfaces

Cloud-Agile Service

Customization

Dynamic radio resource

optimization

Network Slicing

Deep Observability

MME, SGW, PGW

Mobile Edge Services

Caching, SON, Billing

Disaggregated/Virtualized

RAN

Disaggregated /Virtualized

EPC

BBU, RRU front haul fabric

Programmable Data Plane

SDN Control Plane - ONOS

NFV Orchestration

w/XOS

SDN Fabric

Commodity servers, switches, network access

+

White Box White Box White Box White Box

White BoxWhite Box

White Box White Box White Box White Box White BoxWhite Box White Box White Box White Box White Box

M-CORD

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All-Flash Media Server (AF-Media)

- All-flash high density media server - High throughput (40 Gbps) - Low power consumption (<150W) - 2 nodes in 2U (hot pluggable) - 32 SSDs (hot swappable)

Developed a high performance media server using Intel Xeon CPU and Hynix SSDs; deployed as CDN server in our IPTV infrastructure

Thro

hghp

ut(G

bps)

0.00

5.00 10.00

15.00

20.00

25.00 30.00

35.00

40.00

Time (Sec)0:00:00 0:08:20 0:16:40 0:25:00 0:33:20

1Mbps2Mbps7Mbps35Mbps

2Mbps (HD)

7Mbps (Full-HD)

35Mbps (UHD)

# Users Gbps # Users Gbps # Users Gbps

16,000 36.2 4,900 37.3 925 38.9

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Server switch as an NFV platform

- Modular design - Intel RRC switching silicon - 4x PCIe G3 x8 (240 Gbps) - 36 10G SFP+ ports - Duel Intel Xeon E5 - 4x SATA SSD - NW functions (L4/L7 LB, FW, DDoS mitigation, VPN, IDS, etc.)

Developed a server switch to replace dedicated network appliances with virtual network functions

TOR

FW, VPN

Server Farm

Data backup …

Load Balancer

LB VPN FWToR

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SDN-Enabled vEPC Field Trial (planned)

vGW-C

ONOS

eNB

Rest API

PCRFPolicy

OpenFlow 1.3+

vMME

Edge Cloud Core Cloud Internet

B2B, Mission Critical Services

GW-U

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Virtual GW CP/UP Decoupling ONOS in telecom network OpenFlow (1.3+, GTP Extended) based Control of GW-U

GW-U, Running on Top of SDN Switch

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2

3

4

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Going forward

▪ Design an end-to-end open mobile network - Software-defined radio access network (SDRAN) - Software-defined core network (SDCN) - Software-defined data center (SDDC)

▪ Design principles - Open front haul, Open HW and SW - Separation of CP and UP - Mobile edge computing (M-CORD) - Analytics

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Partnering with…

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Thank You!Kang-Won Lee (kangwon@sk.com) SVP of R&D, Network and IT Convergence