Читать книгу Mobile Communications Systems Development - Rajib Taid - Страница 15

This chapter provides the introductory and high‐level architectures of the legacy mobile communications systems which are based on the Global System for Mobile Communication (GSM), Universal Mobile Telecommunication System (UMTS), and Long‐Term Evolution (LTE) systems. However, being legacy and general, some of the contents of this chapter apply to the 5G system also. The architecture of the 5G system shall be covered in Part IV of this book. We begin with the basic network architecture of the legacy GSM system, followed by the architectures of UMTS and LTE systems as well. Following this, we present the different domains or areas of a mobile communications network along with their network elements that are interconnected together to provide communication services to users. The evolution of different mobile communications systems is presented. We also cover the system engineering aspects of a mobile communications network that span across its different domains or knowledge areas.

We then present the standardization processes used for mobile communications systems and networks that are available currently. Standardization is important for successful developments and integrations of multivendor network elements of a mobile communications system and network. Different features added, in terms of a release, during the evolution of a particular mobile communications system are also summarized.