 (alternative scenarios) have been replaced by 'Target network + Development track'. Implementation of particular service types is covered in the following way: Messaging and transactional services are 'service-enabler oriented' and treated in Section 8.6.5. Conversational and streaming services (and partly interactive services) are QoS oriented and treated in Section 8.7.3. Background services are not very demanding, and are not treated at all in this chapter. Ordinary IP networks are suitable bearers. Service plan Chapter 5 User service Target network architecture 3 GPP. Input from Chapter 3 Existing network, Development tracks Service enablers, preferably access independent. Input from Chapter 5 FP convergence Input from Chapters 6 and 7 Traffic cases Figure 8.4 The service plan is examined from a number of angles, starting with the target network Understanding Changing Telecommunications - Building a Successful Telecom Business TELECOM MANAGEMENT Policy Forecast Scenario Final resources approval approval decision Detailed Network planning management Policy evaluation Service plan Strategic planning Product research Target network Boxes with Development track Fundamental dotted lines are Network plans modifications planning Planning criteria of the ITU Forecasting e.g. QoS Service Price list enablers document Products cost structure Land & building Service planning Detailed All other data network data collection pre-processing Traffic measurement External sources Figure 8.5 This ITU Figure with additions supports Chapter 8 8.3 TARGET NETWORK The target network should support the services in the service plan in a competitive way. It should fit the main roles mentioned in Chapter 4. 3GPP has presented network architectures for mobile systems such as Figure 8.6. Our idea is to briefly cover most of the building stones shown in the figure. Let us immediately take a look at the IN type of services, represented by SCP (service control point) and extensively covered in a previous book (Book 1). Many IN functions can 