Public mobile cellular networks are typical representatives of large coverage radio networks. The basic communication principle is the individual connection (dispatching type of network traffic is not considered). This type of network is designed as a network with a big throughput (a lot of parallel connections). The representatives of these networks are cellular mobile networks, e.g. GSM and UMTS. Mobile communication system is created of two basic networks types.
Radio Access Network (RAN) performs basic functions of connection control with a mobile terminal. RAN consists of fixed base stations (access points), which are interconnected by fixed or radio relay links.
Support networks of the mobile communication systems are divided into two classes: