FEMTOCELLS TECHNOLOGY

By

Mr. Adhiraj KapurReg. No.: 120907049

Roll No.: 07 , Section: A

Seminar Presentation

Department of Electronics and Communication Engineering, MIT, Manipal

Department of Electronics and Communication Engineering, MIT, Manipal

Contents• Introduction

• History Of Femtocell

• How Do Femtocells Work

• Why Femtocell

• Features Of Femtocell

• User Benefits

• Operator Benefits

• Advantages Of Femtocells

• Conclusion

Department of Electronics and Communication Engineering, MIT, Manipal

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”

Department of Electronics and Communication Engineering, MIT, Manipal

History Of 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.

Department of Electronics and Communication Engineering, MIT, Manipal

How do femtocells work ?

Department of Electronics and Communication Engineering, MIT, Manipal

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

Why Femtocell ?

Department of Electronics and Communication Engineering, MIT, Manipal

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

Department of Electronics and Communication Engineering, MIT, Manipal

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.

Department of Electronics and Communication Engineering, MIT, Manipal

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

Department of Electronics and Communication Engineering, MIT, Manipal

Advantages Of Femtocell1.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.

Department of Electronics and Communication Engineering, MIT, Manipal

• FUTURE SCOPE

Department of Electronics and Communication Engineering, MIT, Manipal

Department of Electronics and Communication Engineering, MIT, Manipal

Conclusion•Femtocell extends the high-data rate service coverage of UMTS to indoor environment

Higher spectral efficiency due to short range and well isolationWith massive deployment, a solution for ubiquitous mobile broadband access

•A range of case studies verify CSG femtocell operationInterference locally distributedFlexible 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 rateAt 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

Department of Electronics and Communication Engineering, MIT, Manipal

References•Haddad, Y.; Porrat, D.; Femtocell: Opportunities and challenges of the home cellular base station for 3G; Proceedings of IEEE Global Telecommunications Conference, 2007. Washington DC, USA, pp. 3317-3321.•Choi D, Monajemi P, Kang S, Villasenor J; Dealing with Loud Neighbors: The benefits and Tradeoffs of Adaptive Femtocell Access; IEEE Global Telecommunications Conference, 2008.•Chandrasekhar V, Andrews J, Gatherer A; Femtocell networks: a survey; IEEE Communications Magazine, Volume 46, 2008.• Chandrasekhar V. and Andrews J.; Uplink Capacity & Interference Avoidance for Two-Tier Networks; Proceedings of IEEE Global Telecommunications Conference, 2007. Washington DC, USA; Pages 3322-3326.•Rao Y.S., Wing-Cheong Yeung, Kripalani A.; Third generation (3G) Radio Access Standards;International Conference on Communication Technology Proceedings, Beijing; 21st August 2000- 25th Aug 2000; Volume 2, pages 1017 – 1023.• Shu-ping Yeh, Talwar S., Seong-choon Lee, Heechang Kim; WiMAX femtocells: a perspective on network architecture, capacity and coverage; IEEE Communications Magazine; Issue Date: October 2008; Volume 46, Issue 10; Pages 58 – 65.

Department of Electronics and Communication Engineering, MIT, Manipal

THANK YOU