d the necessary infrastructure. It comprises of acquiring sites for installing network equipment and antennas and ensuring that the resulting signal coverage provides efficient, high quality service. It is a dynamic process involving many players: from networking planning to determine suitable positions, to real estate suppliers for physical space (land or rooftops) to measurement and network optimisation suppliers to ensure high quality coverage. It is a costly and complex dynamic process which is further complicated by the interplay of technology and business issues. Review Questions 1. What are the technology issues related to the roll out of a mobile telecommunications infrastructure? 2. What are the business issues related to the roll out of a mobile telecommunications infrastructure? 3. What are the policy issues related to the roll out of a mobile telecommunications infrastructure? 4. What are the reasons behind different cell configurations (macro, micro, etc.)? How is connectivity addressed from the infrastructure structure layer and the content and services layer points of view? What are four different macrocell configurations and how do they relate to population density? 7. How does population density impact on the size of a cell? 8. Why have femtocell, repeater and distributed antenna systems been developed? 9. What are the complexities involved in the design of a mobile network? 10. What values do network planning companies offer to a mobile operator? 11. What roles do wireless LANs play in a mobile infrastructure? 12. What is wireless LAN off-loading and what is its importance? 13. What are the characteristics of the NGNs? 14. Why is an IP end-to-end network considered for NGN? 15. What is fixed-mobile convergence and why is it of importance to the roll out of a mobile network? 16. What do SONs accomplish? 17. How is SON of value to 4G network roll-out? 18. How is subscriber connection control information used to optimise mobile network operation? 19. What are the advantages and disadvantages of a m