CAT2000 GSM Evolution Towards UMTS IFT6275 By Shouwen Zhang Fuman Jin

GSM " Spectrum efficiency " International roaming " Low mobile and base stations costs " Good subjective voice quality " Compatibility with other systems such as ISDN (Integrated Services Digital Network) " Ability to support new services Design criteria

GSM G SM-The world leader of digital cellular market GSM networks are operational in over 120 countries with nearly 300 GSM system operators worldwide million GSM subscribers at the end of1999. GSM subscribers represented 54.46% of a total world cellular subscriber base of million. 462 million phone users by the end of million GSM subscribers By the end of 2004

Third Generation Wireless Systems to enhance and supersede current systems. provide universal personal communications to anyone, regardless of their whereabouts. It will allow for wireless Internet access, videoconferencing, and other wide-bandwidth applications.

The UMTS system consists of two separate parts * The UMTS Terrestrial Radio Access Network (UTRAN): comprising Node B(equivalent to the GSM BTS) and the Radio Network Controller (RNC) * The core network: equivalent to the GSM NSS.

Data-rates 144 kbps at mobile speeds 384 kbps at pedestrian speeds up to 2 Mbps in an indoor environment.

Third Generation System

Migration Path

HSCSD Traditional GSM supports one user per channel per time slot. HSCSD gives a single user simultaneous access to m ultiple channels (up to four) at the same time Easy to implement Drawback: the radio resource is reserved

Path Suggested