overview of femtocell
TRANSCRIPT
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
I. What is the Femtocell ?
II. Why FMC ?III. Difference between Wi-Fi and Femtocell
IV. Femtocell Challenges
V. Advance of 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
I. What is the Femtocell ?
II. Why FMC ?
III. Difference between Wi-Fi and Femtocell
IV. Femtocell Challenges
V. Advance of Femtocell
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
I. What is the Femtocell ?
II. Why FMC ?
III. Difference between Wi-Fi and Femtocell
IV. Femtocell ChallengesV. Advance of Femtocell
Femtocell Challenges
1. Interference Management
2. Auto Configuration
3. Indoor Synchronization
4. Cost & QoS
Femtocell Challenges
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
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
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
Macrocell to Femtocell Interference
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
Femtocell to Femtocell Interference
Femtocell Challenges
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.
Femtocell Challenges
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.
Femtocell Challenges
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
I. What is the Femtocell ?
II. Why FMC ?
III. Difference between Wi-Fi and Femtocell
IV. Femtocell Challenges
V. Advance of Femtocell
Advance Of Femtocell
3G Femtocells
Advance Of Femtocell
LTE Femtocells
Advance Of Femtocell
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
Advance Of Femtocell
LTE Femtocells
Thank You