1. Cyber Physical Systems (Green Networks) Prof. Nicholas Maxemchuk Manu Dhundi

2. Summary Energy 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.

3. Brief Overview 3 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.

4. Energy consumption units Base Station 3 kW max power E1 always there E2 when ON E3 while communication

5. Energy consumption units Mobile Station During Talk : 1 W During 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.

6. Working scenarios Femtocells Penetration Rate $1.5 billion market by 2012 Most data traffic through FAPs Penetration Rate: 0 < r p < 1 Open Access Rate Closed Subscriber Groups (CSGs) closed Closed Subscriber Groups (CSGs) open Open Subscriber Groups (OSG) Cell Coverage Extension

7. Simulation Parameters 7 BS with omni-directional antennas and 86 MSs per cell

8. Simulation Results - 1

9. Simulation Results - 2

10. Simulation Results - 3

11. Conclusion A 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.