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)
A femtocell is a small cellular base station designed for use in residential or small business
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
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”
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
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.
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
• Subscribers get better radio service at low price
Definition & Differentiation Of Femtocell
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
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
- 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.
- 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
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,
• 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
• 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.