3GTechologies.ppt

WCDMA, HSPA and advanced receivers Timo Nihtil?, Ph.Lic. (Ph.D. def.) Senior Research Scientist Magister Solutions Ltd. Readings related to the subject General readings WCDMA for UMTS – Harri Holma, Antti Toskala HSDPA/HSUPA for UMTS – Harri Holma, Antti Toskala Network planning oriented Radio Network Planning and Optimisation for UMTS – Janna Laiho, Achim Wacker, Tomás Novosad UMTS Radio Network Planning, Optimization and QoS Management For Practical Engineering Tasks – Jukka Lempi?inen, Matti Manninen Outline Background Key concepts Code multiplexing Spreading Introduction to Wideband Code Division Multiple Access (WCDMA) WCDMA Performance Enhancements High Speed Packet Access (HSDPA/HSUPA) Advanced features for HSDPA Background Why new radio access system Need for universal standard (Universal Mobile Telecommunication System) Support for packet data services IP data in core network Wireless IP New services in mobile multimedia need faster data transmission and flexible utilization of the spectrum FDMA and TDMA are not efficient enough TDMA wastes time resources FDMA wastes frequency resources CDMA can exploit the whole bandwidth constantly Wideband CDMA was selected for a radio access system for UMTS (1997) (Actually the superiority of OFDM was not fully understood by then) Frequency allocations for UMTS Frequency plans of Europe, Japan and Korea are harmonized US plan is incompatible, the spectrum reserved for 3G elsewhere is currently used for the US 2G standards IMT-2000 band in Europe: FDD 2x60MHz Standardization WCDMA was studied in various research programs in the industry and universities WCDMA was chosen besides ETSI also in other forums like ARIB (Japan) as 3G technology in late 1997/early 1998. During 1998 parallel work proceeded in ETSI and ARIB (mainly), with commonalities but also differences Work was also on-going in USA and Korea Standardization At end of 1998 different standardization organizations got together and created 3GPP, 3rd Generatio