| The third generation of mobile telephone systems (3G) or UMTS (Universal Mobile Telephone System) will take cellular communications to new dimensions. Wireless communications to date have now moved alongside the advances in multimedia, digital television, Internet/ Intranet and Internet protocol (IP) based services. Third generation systems are set to integrate these technologies into a universal system, encompassing comprehensive, feature-rich entertainment, information and commerce at the subscriber terminal. Interactive UMTS internet/web access opens the door to a wide range of new mobile data applications such as electronic banking, telemedicine location based services etc…that are not possible with current wireless systems.The Challenges for 3G network designers are because 3G subscriber terminals will be multi-service capable and will enable users to select different bit rate service requirements. Each 3G carrier frequency used across the air interface will therefore bear multiple services and the planning of concurrent services need to be considered. Different data rate services can be transported in circuit switched or packet switched format and, additionally, can be transported in real-time or non real-time. These basic characteristics complicate traffic engineering (Traffic modeling) predictions.To plan and deploy a mobile network effectively, RF engineers face a number of obstacles, several of which can be overcome by selecting first-rate geographic data. Signal propagation predictions, traffic distribution etc…The 3G network planners need to apply more rigorous precision to their projects: compared to voice transmission, data transmission leaves less margin for error. One of the main challenges facing RF engineers involves positioning micro cells in order to absorb larger amounts of traffic while improving signal penetration inside buildings. They need to compute signal propagation along streets and buildings very precisely, and...
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