Title :
Characterization of soft handoff in CDMA systems
Author :
Kim, Duk Kyung ; Sung, Dan Keun
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
fDate :
7/1/1999 12:00:00 AM
Abstract :
Many analytical approaches have been proposed for handoff analysis based on hard handoff in mobile communication systems. In code-division multiple-access (CDMA) systems with soft handoff, mobile stations (MSs) within a soft handoff region (SR) use multiple radio channels and receive their signals from multiple base stations (BSs) simultaneously. Therefore, the SRs should be considered for handoff analysis in CDMA systems. An analytical model for soft handoff in CDMA systems is developed by introducing an overlap region between adjacent cells and the handoff call attempt rate and the channel holding times are derived. Applying these results to a nonprioritized CDMA system, the effects of soft handoff and the mean cell residual time are investigated and compared with hard handoff
Keywords :
cellular radio; code division multiple access; probability; telecommunication traffic; adjacent cells; cellular radio; channel holding times; code-division multiple-access; handoff analysis; handoff call attempt rate; handoff failure probability; hard handoff; mean cell residual time; mobile communication systems; mobile stations; multiple base stations; multiple radio channels; nonprioritized CDMA system; overlap region; soft handoff region; traffic model; Analytical models; Base stations; Fading; Frequency; Mobile communication; Multiaccess communication; Multipath channels; Shadow mapping; Strontium; Time division multiple access;
Journal_Title :
Vehicular Technology, IEEE Transactions on
