Description of 3G architecture: User Equipment The 3G system consists of two main parts: the User Equipment (UE) and the UMTS Terrestrial Radio Access Network (UTRAN). The UE is the mobile phone and the UTRAN is the base station and the network intelligence. Both the UE and the UTRAN are composed of different layers. UMTS network architecture: The architecture for a UMTS network was designed to enable packet data to be carried over the network, whilst still enabling it to support circuit switched voice. All the usual functions enabling access toth e network, roaming and the like are also supported. Radio Link Control Protocol (RLC) is a layer 2 protocol in the UMTS system. This tutorial is an overview of RLC functionalities and architecture. Evolution from GSM to UMTS. Outline of the lecture • Evolutions form GSM to UMTS. • 3G network architecture. • Service provision in UMTS. Evolution types • Evolution contains not only technical evolution but also expansion to network architecture and services. • UMTS is a complete system architecture - As in GSM emphasis on standardized interfaces • mix and match equipment from various vendors - Simple evolution from GPRS - allows one to reuse/upgrade some of the GPRS backhaul equipment UMTS system architecture, protocols & processes Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. The UMTS architecture is shown in Figure 2-17. Figure 2-17 UMTS Architecture. General Packet Radio System. The General Packet Radio System (GPRS) facilitates the transition from phase1/2 GSM networks to 3G UMTS networks. The GPRS supplements GSM networks by enabling packet switching and allowing UMTS system architecture (R99) is based on GSM/GPRS. Security architecture overview. Authentication and key agreement Prerequisites UMTS R99 offers better subscriber safety than GSM UMTS(Univer