Femtocell Ppt

FEMTOCELLS Presented By: Sonam Aggarwal MT2310207

Click to edit Master subtitle style By Sonam

5/8/12

Agenda

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Introduction

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Literature Survey

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Femtocell Network Architecture

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Femtocell Interference Scenarios

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Handoff Discussion

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Femtocell System Benefits

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Future of Femtocells

By Sonam Aggarwal

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introduction

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A Femtocell is a small mobile telecommunication network base station that

Operates in licensed spectrum and is controlled by the 5/8/12 By Sonam Aggarwal 

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Femtocell Basic Concept

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Literature Survey

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Fan, Z. and Sun, Y., “Access and handover management for femtocell systems”, International Journal on Electronics and Communication Technology, 2010

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In this paper analysis on interference impact on femtocells have been provided.

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When a non-CSG MS comes close to the femtocell in question, the macrocell BS makes the decision (based on the CSG access list exchanged from the femtocell) that unnecessary handover will not be initiated, saving radio resource and signaling load on the network.

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At the same time various interference mitigation mechanisms can be operated. 5/8/12 By Sonam Aggarwal

Network Architecture

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Femtocell Reference Interfaces

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Femtocell reference interfaces(Contd.)

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FAP: It is a hardware device located at the customer’s premise that

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interfaces with mobile devices over the air radio interface .

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interfaces with core broadband interface.

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FGW: It interfaces with the FAP over the broadband access network (Fa).

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Performs necessary protocol networking

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network

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Provides an aggregation functionality for a 5/8/12 group of FAPs.

By Sonam Aggarwal

Femtocell reference interfaces(Contd.)

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Subscriber Databases: used to store customer provisioning information needed to offer service.

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FMS: It supports 2 interfaces:

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Fm: used to manage the FAP device.

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Fg: used to manage the FGW.

FAS: It interfaces to IMS via Fas interface

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1010

UMTS Femtocell Architecture

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Femtocell Interference Scenarios

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4 main interference scenarios are:

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Femtocells interfering with the base stations on same frequency

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Base station interfering with the femtocells on the same frequency

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Closely spaced femtocells interfering with each other

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User equipment transmitting with a sufficiently high power such that it is received by more than one base station By Sonam Aggarwal

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Solutions to Interference Problem

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Adaptive pilot power control

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Dynamic femtocell receiver gain management

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Mobile phone uplink power capping

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Extended femtocell receiver dynamic range

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Handoff Discussion

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There are 3 main scenarios for femtocell handover:

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Inbound (from the macrocell to the femtocell

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Outbound (from the femtocell to the macrocell)

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From one femtocell to another femtocell

By Sonam Aggarwal

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Femtocell System Benefits

By Sonam

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advantages to the femtocell user

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Simple Deployment

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Increased user throughput

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Improve indoor coverage

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Reduced power consumption

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Improved voice quality

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Security

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Improved consumer satisfaction

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advantages to the network provider

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Increased revenue

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Reduced cost

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Increased capacity

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Improved indoor coverage

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Product differentiation

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Improved customer satisfaction

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Future Of Femtocells

By Sonam Aggarwal

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1818

Femtocell Ecosystem

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1919

Supported Frequency Bands

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THANK YOU!!

By Sonam

2020

5/8/12