Title :
Acknowledgment of 3GPP WCDMA random and packet access applying space-time transmit-diversity
Author :
Schulist, Matthias
Author_Institution :
Ericsson Eurolab Deutschland GmbH, Nuremburg, Germany
Abstract :
Advanced packet-access based services are now widely considered to play the key role in 3rd generation (3G) mobile communication systems. The FDD-mode (commonly denoted as WCDMA) standardized by the 3 rd Generation Partnership Project (3GPP) provides a variety of logical, transport and physical channels to assist efficient packet based transmission. Random access channel (RACH) and common packet channel (CPCH) are reverse link (packet) channels that are shared among several users. So-called acquisition indicator channels (AICH) are used with RACH and CPCH on the physical layer to assist fast acknowledgment of (packet) access grants or rejections. Space-time transmit diversity (STTD) is the WCDMA concept for performance improvement of forward link, nonpower-controlled, physical channels like AICH. This paper describes the RACH and CPCH concept with emphasis of the AICH. It introduces the STTD concept for AICH and shows link layer performance results with and without applying STTD
Keywords :
broadband networks; cellular radio; code division multiple access; multiuser channels; packet radio networks; random processes; 3rd Generation Partnership Project; 3rd generation mobile communication systems; 3G mobile communication systems; 3GPP WCDMA packet access; 3GPP WCDMA random access; FDD-mode; WCDMA; acquisition indicator channels; common packet channel; fast physical layer acknowledgment; forward link; link layer performance; logical channels; nonpower-controlled channels; packet access grants; packet based transmission; packet channels; packet rejections; packet-access based services; physical channels; random access channel; reverse link channels; reverse packet channel; space-time transmit-diversity; transport channels; 3G mobile communication; Artificial intelligence; Delay; Europe; Marine vehicles; Multiaccess communication; Physical layer; Telecommunications; Tin; Wideband;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944055