overview of femtocell

FemtoCellMOON SEONG-HOON

Contents

I. What is the Femtocell ?

II. Why FMC ?

III. Difference between Wi-Fi and Femtocell

IV. Femtocell Challenges

V. Advance of Femtocell

What is the Femtocell?

What is the Femtocell?

Features

✓ The FS is a small cellular base station for use in a home or small business over a broadband connection.

✓ 4~24 users , 10~30 km/h mobility✓ Better coverage and capacity✓ Improved macro reliability✓ The concept is applicable to all wireless standards,

including UMTS, GSM, CDMA, HSPA and WiMAX as well.

Contents


II. Why FMC ?III. Difference between Wi-Fi and Femtocell



Why FMC ?

✓ FMC(Fixed-Mobile Convergence) : A transition point in the telecommunications industry that will provide to customers by creating seamless services using a combination of fixed broadband and local access.

InternetCellular

Why FMC ?

✓ For Operators• Decreased management

work• Decreased transmission

cost• Decreased churn rate• No need to rent sites• Increased ARPU

✓ For Customers • Improved coverage,

quality and data rate• Potential services• Lower price (Bundle

costs)

Benefits

Contents


II. Why FMC ?




Wi-Fi Access VS Femtocell

VS

✓ Widely Deployed Technology (matured)

✓ Cheap Wi-Fi Access Routers

✓ Uses the unlicensed spectrum, which often crowded with other devices and source (Degraded performance)

✓ Better Coverage and Capacity

✓ Encrypted and the automatically switches over to the Femtocells when come in their range

✓ Signal interference with macro tower

✓ Multiple Standards

Wi-Fi Access VS Femtocell

VS

✓ Widely Deployed Technology (matured)

✓ Cheap Wi-Fi Access Routers

✓ Uses the unlicensed spectrum, which often crowded with other devices and source (Degraded performance)

Combinations of Wi-Fi & Femtocell ?!

✓ Better Coverage and Capacity

✓ Encrypted and the automatically switches over to the Femtocells when come in their range

✓ Signal interference with macro tower

✓ Multiple Standards

Contents


II. Why FMC ?


IV. Femtocell ChallengesV. Advance of Femtocell

Femtocell Challenges

1. Interference Management

2. Auto Configuration

3. Indoor Synchronization

4. Cost & QoS


Interference Management

✓ Macrocell-to-Femtocell

< Shared Frequency >

✓ Femtocell-to-Femtocell

Femto Femto

Femtocell ChallengesInterference Management

< Indoor/outdoor coverage in different simulation scenarios. > Ref. WiMAX Femtocells: A Perspective on Network Architecture, Capacity, and CoverageIEEE Communication Magazine Vol. 46, Issue 10, Oct. 2008



Greater coverage performance



Macrocell to Femtocell Interference



Femtocell to Femtocell Interference


Auto Configuration

Femto-AP has to provide a plug-and-play device that can integrate itself into the network without user intervention!!

1. Purchase and registration.

2. Installation and authentication.

3. Auto-configuration of initial parameters.(Frequency for UL & DL, Initial & maximum transmit power .....)

4. Location check.

5. Ongoing self-optimization during operation.


Indoor Synchronization

✓ To align received signals to minimize multi-access interference.

✓ Macrocell users can hand off to a femtocell or vice versa.

✓ To compensate frequency for inter-carrier interference.

✓ Accurate time reference for TDD systems.


Indoor Synchronization

✓ To align received signals to minimize multi-access interference.

✓ Macrocell users can hand off to a femtocell or vice versa.

✓ To compensate frequency for inter-carrier interference.

✓ Accurate time reference for TDD systems.

IEEE 1588 or GPS

HOW ?

Contents


II. Why FMC ?




Advance Of Femtocell

3G Femtocells


LTE Femtocells


LTE Femtocells

OA&M

Silicon Convergence Layer

MIMO RF

RFModule

GPS

Timing

GPS

PHYSupport

TurboDecoder

FPGA

DownlinkPHY

UplinkPHY

NetworkMonitoring

IntercellRRM

RBControl

ConnectionMobility

RadioAdmission

RRCPDCPRLCMAC

S1-AP

SCTP

eGTP

IPSec

IP

Home eNodeB Application

Measure,Config &Provision

IPBackhaul


LTE Femtocells

Thank You

overview of femtocell

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