Evolving Mobile Networks

Abstract

While the history of mobile communications is long [1][2][3], and the background of mobile networks thereby is also long, in this chapter we focus on the historic evolution in terms of network architecture and services starting with Second Generation (2G) mobile systems. In particular, we consider the development of the architecture of Global System for Mobile Communications (GSM), since it is by far the most widespread mobile system in the world today. This will provide the basis to cover the introduction of Universal Mobile Telecommunication Services (UMTS) in relation to its Core Network (CN) and radio architectures. The latter will in turn serve as the platform to present UMTS radio-access technology, which is one of the aims of this book.