Скачать или смотреть 3G/UMTS Architecture LEC 9 explained by Yogesh Gahlawat Universal Mobile Telecommunication System

The UMTS network is divided into two logical networks, i.e., core network (CN) and radio access network (RAN). The CN and RAN are connected via an open interface. The network architecture is continuously evolving to enable a smooth transition from 2G to 3G, leveraging existing and new technologies. Several specifications based on this evolution have been released by 3GPP.
UTRAN consists of several radio network subsystems (RNSs). An RNS is supported by the core network. Each RNS consists of base stations, termed as Node B in UMTS, and a radio network controller (RNC). The RNC is a BSC equivalent and controls several Node Bs. As shown in Figure 5-1, the 3G terminals (UE) interface with UTRAN using the Uu interface, which is a WCDMA-based radio link.
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