2
Evolved UMTS Overview
The objective of this chapter is to present an overview of the Evolved UMTS system, as an introduction to the more in-depth view provided by the subsequent chapters.
In the two first sections, the main requirements and basic concepts are looked at, from the radio interface and overall network architecture perspectives. Then, the overall architecture of Evolved UMTS is described, highlighting common views and disruptions with existing 3G UMTS systems, including a brief description of the terminal logical architecture and SIM card aspects.
The IP Multimedia, as well as policy and charging features, is also described in this chapter. Although being more related to the application level, those two domains are part of the wireless network architecture. This chapter also describes how these features relate to the existing 3G nodes, and how they progress in the scope of Evolved UMTS.
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