Green Cellular Network with Femtocells

Cyber Physical Systems (Green Networks)Prof. Nicholas Maxemchuk

Manu Dhundi

Paper Presentation - 2

SummaryEnergy consumption framework to evaluate total energy

consumption in a cellular network with femto cells.Limited to cells installed in pre-determined locations.Results show that femto cells make conventional cellular

networks greener.A guideline is provided to network operators to deploy

and manage a femtocell network in a greener way.

Brief Overview3 main energy consumption units in a cellular network:

BS -- 3 energy states namely, (i) turn-off (ii) radio-off

(iii)radio on MS FAP (Femto cell Access Point)

3 working scenarios: Femtocells Penetration rate Open Access Rate Cell Coverage Extension

Simulation Environment:Hexagonal Cells, 7 BSs, 86 MSs per cell (indoor, outdoor, near indoor), 10 buildings per cell, Building may or may not have FAPs, path loss.

Energy consumption unitsBase Station3 kW max powerE1 always thereE2 when ONE3 while communication

Energy consumption unitsMobile StationDuring Talk : 1 WDuring Standby : 0.017 W

Femto Cell Access Points (FAPs)No thorough investigation yet.9W is max limit as per EU code of conduct on energy.

Working scenariosFemtocells Penetration Rate$1.5 billion market by 2012Most data traffic through FAPsPenetration Rate: 0 < rp < 1

Open Access RateClosed Subscriber Groups (CSGs) closedClosed Subscriber Groups (CSGs) openOpen Subscriber Groups (OSG)

Cell Coverage Extension

Simulation Parameters7 BS with omni-directional antennas and 86 MSs per cell

Simulation Results - 1

Simulation Results - 2

Simulation Results - 3

ConclusionA framework to evaluate total energy consumption in a

cellular network with femto cells is discussed.Femto Cell is greener technology.Guideline (implicit) to cellular operators to deploy femto

cells.