Femtocell Ppt
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Transcript of 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
BY SONAM AGGARWAL
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.
BY SONAM AGGARWAL 6
NETWORK ARCHITECTURE
7FEMTOCELL REFERENCE
INTERFACES
BY SONAM AGGARWAL
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
BY SONAM AGGARWAL
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
BY SONAM AGGARWAL
10UMTS FEMTOCELL
ARCHITECTURE
BY SONAM AGGARWAL
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
BY SONAM AGGARWAL
12SOLUTIONS TO
INTERFERENCE PROBLEM
Adaptive pilot power control
Dynamic femtocell receiver gain management
Mobile phone uplink power capping
Extended femtocell receiver dynamic range
BY SONAM AGGARWAL
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
BY SONAM AGGARWAL 14
FEMTOCELL SYSTEM BENEFITS
BY SONAM AGGARWAL
15ADVANTAGES TO THE
FEMTOCELL USER
Simple Deployment
Increased user throughput
Improve indoor coverage
Reduced power consumption
Improved voice quality
Security
Improved consumer satisfaction
BY SONAM AGGARWAL
16ADVANTAGES TO THE NETWORK PROVIDER
Increased revenue
Reduced cost
Increased capacity
Improved indoor coverage
Product differentiation
Improved customer satisfaction
BY SONAM AGGARWAL
17FUTURE OF
FEMTOCELLS
18FEMTOCELL ECOSYSTEM
BY SONAM AGGARWAL
19SUPPORTED
FREQUENCY BANDS
BY SONAM AGGARWAL 20
THANK YOU!!