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

Volume

2

fYear

1999

fDate

36342

Firstpage

1402

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999 IEEE 49th

Conference_Location

Houston, TX

ISSN

1090-3038

Print_ISBN

0-7803-5565-2

Type

conf

DOI

10.1109/VETEC.1999.780578

Filename

780578