of CDMA cells (with its theoretical capacity and cell loading effects) constitute the essential parts of this chapter. Link budget principles for the forward and reverse links and their re- spective formulation are covered. In the latter part, these principles are applied to a field study. For completeness the chapter also describes briefly the dimensioning of the RNC in the UTRAN side. Chapter 7 also presents the dimensioning of the core network and transmission systems. In the last part, results of a field study are provided using hypo- thetical parameters to illustrate the concepts end-to-end. The illustrations correspond to dimensioning exercises carried out while optimizing 3G networks. However, the input and output values in this chapter do not necessarily reflect actual values that may be used directly while dimensioning a future UMTS network. Finally, to complete the as- sessment of UMTS network deployment within 2G networks like GSM, this chapter discusses briefly co-location and site sharing, as well as co-location of antenna systems. Chapter 8 presents issues on resource and network management. It covers radio re- source management and signalling, i.e. managing power (fast and low). The conceptual aspects of network management are covered from the network management system point of view. Initial considerations for network optimization are also covered. Chapter 9 as a prelude to future predominantly PS domain networks, covers the concep- tual architecture of UMTS Release 2000 or more specifically Release 4 and 5. It starts Preface with the evolution of R99 and discusses briefly the long term view and vision of the UMTS architecture. Then it describes the components of ROO with their corresponding interfaces or reference points. This chapter also presents an introduction to and consid- erations of mobility management, registration aspects, multimedia signalling, service platforms, QoS aspects, and transport issues such as the basic differences of Ipv4 and Ipv6. The UMTS Network and Radio Access Technolog