MWC case study: Delivering the World's First LTE Small Cell

Barcelona | 25 – 28 February 2013

Delivering the world’s first public access LTE small cell network

Geun Hwangbo, Tech. Leader, SK Telecom

Il-Hyun Sohn, Director R&D Center, SK Telesys

Manish Singh, Chief Technology Officer, Radisys

SK Telecom Femtocell Cost Efficiency

0

5

10

WiFi SiteEasy toConnect

Hard toConnectExcept

BackhaulCost

Include Backhaul Cost

Macro Femtocell (+WiFi)

‘Cost per Megabyte’ and ‘Quality Enhancement’

[ ＄,USD ]

0

20

40

60

Macro Femto

Site#1

Site#2

Site#3

Site#4

Site#5

Site#6

Site#7

Site#8

Site#9

[ Throughput ]

SK Telecom Femtocell Tech. Initiative

Femto Zone

EPC

S1 X2

Macro Zone

FGW

Performance during Handover

HO Type Throughput VoLTE MOS

S1 16.9 3.74

X2 20.1 3.83

(1) X2 Handover between Femto and Macro

X2

■ SKT’s proprietary X2 H/O through Gateway Test Results

SK Telecom Femtocell Tech. Initiative

HO Type Throughput VoLTE MOS

X2 20.1 3.83

(2) Coverage Extension Solution

Femto#1 Femto#2

Femto#3 Femto#4

FRS#1

HO Type Throughput VoLTE MOS

No H/O 27.1 4.45

■ Multi Femtocells ■ Single Femto DU & Multi RUs

※ FRS : Femto Remote System

SK Telecom Femtocell Tech. Initiative

(3) Femto Interference Coordination System

FICS HeNB GWInterference Data Gathering

HeNB

HeNB

HeNBeNB

Interference Control

■ Periodic network listening

→ Fine power control based on CQI statistics

from Femtocell UEs

→ Rapid power adjustment based on abrupt

Femtocell’s UL interference level to

protect macro UE’s QoS

eNB

MUE

MUE FUE

MUE

※ Macro - Femto ICS Test Scenario eNB → HeNB Edge → eNB

Test Results - Throughput increased by 50% after FICS On

ICS OFF ICS ONThroughput

Time

* Checked per 10 seconds

Small Cell Product & Lessons Learned

LTE Small Cell Products of SK Telesys

• LTE Public Femto AP

╴Max 32 users

╴Built-in Wi-Fi AP

• LTE Residential Femto AP

╴Max 8 users

Lessons Learned

• System performance optimization

• QoS and advanced features for VoLTE service

• IOT between small cell network and macro cell network

Radisys LTE Deployment Expertise

Application

Server Media

Resource

Function

IMS

PCRF

PCEF

MME

SEG SGW PGW eNodeB

UE

Home

eNodeB

UE

Radio Access Network Evolved Packet Core Policy Control IP Multimedia Subsystem

First Small Cell Deployments

15 active trials & deployments

EPCs in Korea, Japan, US and Europe

Undisputed ATCA leader with >40% market share

VoLTE trials in India, US and Europe

World’s 1st VoLTE deployment at

MetroPCS

Enabling Deployment Lessons Learned

RAN & Core Interoperability

Self-Organizing

Networks

Open access capacity management

VoLTE small cell implications

Radisys Small Cells Vision

Small Cells & Relay Multi-Mode

+

TDD Spectrum Usage

Radisys & Airspan Deliver

1st LTE-A Small Cell

Radisys Mindspeed, &

InterDigital Demonstrate

Dynamic Bandwidth

Management

Radisys 1st TDD

Small Cell Delivered

MWC 2010

Barcelona | 25 – 28 February 2013

Thank You

For More Details Join Radisys

at the Small Cell Zone (7G74)

at 1:00 pm tomorrow

Visit us at:

SK Telecom: 3C104

SK Telesys: 5G34

Radisys: 5G34

Radisys [5G34]