ppt on femtocell

1. A DETAILED STUDY ON FEMTOCELL
SUBMITTED BY :
SPANDAN MUKHOPADHYAY (12000312109)
MD. GHOLAM SARWER (12000312057)
SATYAM SINHA (12000312088)
VIKRAM KUMAR (12000312123)
SUMIT PAREEK (12000312116)
DHIRAJ KUMAR SARRAF (12000312040)
1ECE-1(y)

2. Introduction
 A femtocell is a small cellular base station designed for use in residential or small business
environments
 It connects to the service provider’s network via broadband (such as DSL or cable) and
typically supports 2 to 5 mobile phones in a residential setting
 A femtocell allows service providers to extend service coverage inside of your home -
especially where access would otherwise be limited or unavailable - without the need for
expensive cellular towers
 It also decreases backhaul costs since it routes your mobile phone traffic through the IP
network
 A femtocell is sometimes referred to as a “home base station”, “access point base station”,
“3G access point”, “small cellular base station” and “personal 2G-3G base station”
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3. History On Femtocell
 The first interest in femtocells started around 2002 when a group of engineers at Motorola
were investigating possible new applications and methodologies that could be used with
mobile communications.
 A couple of years later in 2004, the idea was beginning to gain some momentum and a
variety of companies were looking into the idea.
 With the idea gaining momentum, and many more companies investigating femto cell
technology, the Femto Forum was set up in July 2007. Its aim was to promote the wide-
scale adoption of femtocells. With mounting industry pressure to be able to deploy femto
cell technology, the Femto Forum also played a coordinating role in ensuring that the
standards were agreed and released as fast as possible.
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4. How does femtocell works ?
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5. Why Femtocell ?
• Technical motivation
• Reduced separation distance between transmitter and receiver
• Interference is isolated by building structure
• Limited number of users
• Business motivation
• Half of voice calls and a majority of data traffic originate indoor
• Operators expand network capacity and coverage without much investments on
infrastructure.
• Subscribers get better radio service at low price
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6. Definition & Differentiation Of Femtocell
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Femtocell Picocell Wifi
Site Rental customer operator customer
Installation customer operator customer
Electricity Bill customer operator customer
Radio Planning no (local) yes (prior & global) no
Backhaul Connection via customer dedicated via customer
Macrocell Interaction not (yet) yes not applicable
Transmission Power < 23dBm 23-30dBm 20dBm
Access Rights mainly closed public closed
Handover possible yes vertical
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7. Features of Femtocell
• Operates in the licensed spectrum
• Uses fixed broadband connection for backhaul
• It is managed by the NAP
• The backhaul service provider may be different from NAP/NSP
• Principally intended for home and SOHO
• Lower cost than PicoBS
• Smaller coverage (low power) than PicoBS
• Smaller number of subscriber (ten or less) than PicoBS
• Higher density
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8. Users Benefits
- Reduced “in home” call charges.
- Improved indoor coverage (Base station in your bedroom).
- Continued use of current handset.
- Reduced battery drain.
- Fast/Higher performance 3G services.
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9. Operators’benefits
- Improves coverage.
- Reduces backhaul traffic.
- Provides capacity enhancements.
- Reduces churn.
- Easy Radio Coverage for rural areas.
- Where there is ADSL you can have mobility.
- Stimulates 3G usage.
- Addresses the fixed mobile convergence market with a highly attractive and efficient
solution.
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10. Advantages Of Femtocell
1. Low Device Cost:
 efficient, low-cost power amplifiers, highly sensitive receivers, flexible channel bandwidth, reliable RF filters;
low cost and low power implementation; etc.
2. System Interference Management:
 minimize interference to macro (and vice versa); minimize interference to adjacent femtos; coping with
unplanned rollouts; coverage estimation, interference cancellation; etc.
3. Femtocell Capacity Maximization:
 link and access management (handover, admission control, resource management, load balancing and flow
control); dynamic bandwidth allocation and sharing; etc.
4. Backhaul Issues:
 wired or wireless backhaul, reducing signaling load, QoS provisioning and traffic priorization, joint access and
backhaul design; etc.
5. Viable System Architecture:
 control & data planes, access control, authentication, local breakout, efficient forwarding, seamless mobility,
zero-config, etc.
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11. Conclusion
• Femtocell extends the high-data rate service coverage of UMTS to indoor environment
• Higher spectral efficiency due to short range and well isolation
• With massive deployment, a solution for ubiquitous mobile broadband access
• A range of case studies verify CSG femtocell operation
• Interference locally distributed
• Flexible spectrum scheme is efficient to reduce uplink outage rate
• Mobile teletrauma use case:
• With a certain level of femtocell penetration ratio, the service can be delivered with sufficient low
outage rate
• At least an order of magnitude reduction in service outage rates when femtocells are utilized,
compared with macrocell only case
• Downlink direction study is also interesting and beneficial to complete the use case study.
In the long term, the research direction is LTE femtocell.
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THANK YOU