Title :
Evaluation of handover algorithms for packet transmissions in WCDMA
Author :
Karlsson, Magnus ; Guerin, Nicolas ; Laaksonen, Niina ; Ostermayer, Gerald
Author_Institution :
Ericsson Radio Syst. AB, Stockholm, Sweden
Abstract :
The wideband CDMA (WCDMA) solution for UMTS/IMT-2000 is currently being globally standardized within the 3rd Generation Partnership Project (3GPP). In order to facilitate mobile multimedia communications, WCDMA is being highly optimized for efficient packet transmissions. This paper evaluates macro diversity gains for high bitrate packet transmissions in a WCDMA system. Comparisons are made with hard handover which does not provide macro diversity. Evaluations have been made for both uplink and downlink by means of detailed computer simulations including fast fading and fast power control. The results show that in the downlink, the gain of macro diversity depends on the characteristics of the radio channel. The largest gain is achieved for channels with limited multipath propagation. In the uplink, macro diversity is shown to be essential in order to provide good system capacity
Keywords :
broadband networks; cellular radio; code division multiple access; digital radio; diversity reception; multimedia communication; packet radio networks; UMTS/IMT-2000; WCDMA; downlink; fading; handover algorithms; high bitrate packet transmissions; macro diversity gains; mobile multimedia communications; multipath propagation; packet transmissions; power control; radio channel; system capacity; uplink; wideband CDMA; 3G mobile communication; Bit rate; Computer simulation; Diversity methods; Downlink; Fading; Mobile communication; Multiaccess communication; Multimedia communication; Wideband;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.780578
