Femtocell Ppt

Presented By:Sonam AggarwalMT2310207

FEMTOCELLS

2 AGENDA

Introduction

Literature Survey

Femtocell Network Architecture

Femtocell Interference Scenarios

Handoff Discussion

Femtocell System Benefits

Future of Femtocells

BY SONAM AGGARWAL

3 INTRODUCTION

A Femtocell is a small mobile telecommunic-ation network base station that Operates in licensed spectrum and is

controlled by the operator Can be connected with existing handsets Uses residential DSL or cable broadband

connections Can be installed by the customer without

any special skills

BY SONAM AGGARWAL

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4FEMTOCELL BASIC

CONCEPT

5LITERATURE

SURVEY

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

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

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.

At the same time various interference mitigation mechanisms can be operated.

A hybrid access mode and a femtocell-initiated handover procedure with adaptive threshold have also been discussed.

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NETWORK ARCHITECTURE

7FEMTOCELL REFERENCE

INTERFACES

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8FEMTOCELL REFERENCE

INTERFACES(CONTD.)

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

interfaces with mobile devices over the air radio interface .

interfaces with core network via broadband interface.

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

Performs necessary protocol networking

Provides an aggregation functionality for a group of FAPs.

Also performs function of security gateway.

Interfaces with different MNO network segments using interfaces like Fb-cs, Fb-ps and Fb-ims

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9FEMTOCELL REFERENCE

INTERFACES(CONTD.)

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

FMS: It supports 2 interfaces:

Fm: used to manage the FAP device.

Fg: used to manage the FGW.

FAS: It interfaces to IMS via Fas interface

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10UMTS FEMTOCELL

ARCHITECTURE

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11FEMTOCELL INTERFERENCE

SCENARIOS

4 main interference scenarios are:

Femtocells interfering with the base stations on same frequency

Base station interfering with the femtocells on the same frequency

Closely spaced femtocells interfering with each other

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

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12SOLUTIONS TO

INTERFERENCE PROBLEM

Adaptive pilot power control

Dynamic femtocell receiver gain management

Mobile phone uplink power capping

Extended femtocell receiver dynamic range

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13HANDOFF

DISCUSSION

There are 3 main scenarios for femtocell handover:

Inbound (from the macrocell to the femtocell

Outbound (from the femtocell to the macrocell)

From one femtocell to another femtocell

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FEMTOCELL SYSTEM BENEFITS

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15ADVANTAGES TO THE

FEMTOCELL USER

Simple Deployment

Increased user throughput

Improve indoor coverage

Reduced power consumption

Improved voice quality

Security

Improved consumer satisfaction

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16ADVANTAGES TO THE NETWORK PROVIDER

Increased revenue

Reduced cost

Increased capacity

Improved indoor coverage

Product differentiation

Improved customer satisfaction

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17FUTURE OF

FEMTOCELLS

18FEMTOCELL ECOSYSTEM

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19SUPPORTED

FREQUENCY BANDS

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THANK YOU!!