oriented customer care. The overall objective of this section is thus to support revenue generation and con- tribute to the multi-angle view of services that are necessary in the new telecom world. Special attention is given to service segmentation, elaboration of a service plan, service terminology and to quality of service (QoS), another important integrator. The objectives can be illustrated by means of Figure 5.5. More specific chapter objectives are to: Understand the importance of digital rights management (DRM) to enhance con- tent provision. Explain success factors related to services. Know two main ways of grouping services. Explain web services and multimedia services. Know the main possible principles for charging. Grouping of services Volume relations in the service plan Terminal Terminal or server Applications Service enablers Service enablers Adaptations Network control and Intelligence Bandwidth Access Access connectivity Core connectivity connectivity Figure 5.5 Hundreds of services are grouped into a number of segments, with defined require- ments on the network and terminals Services Explain what a service plan is and the criteria for service selection. Understand service QoS and related network requirements. Describe three methods to decrease service bandwidth needs. Understand the relation between service requirements and design of various network parts. 5.1.3 TERMINOLOGY The service area is dynamic. Today we talk about multimedia services, web services, posi- tioning services, video services and SO on, proving that 'services' can have many different flavours. Other important terms are media stream and digital rights management (DRM). What is DRM? DRM poses one of the greatest challenges for content communities in this digital age. A main reason is that digital files can be easily copied and transmitted, breaking copy- right law. DRM covers the description, identification, trading, protection, monitoring and tracking of all forms of rights usages. Since content is a key to success for the inte