Impact of Limited Number of Wired Channels on Soft Handoff in CDMA Cellular Systems

In CDMA mobile cellular systems, wireless quality is improved by soft handoff techniques. However, it requires to hold multiple channels of cells, which is likely to increase call blocking at wired channels. It is therefore necessary to consider the entire system including the wired and wireless portions of systems for investigating an effectiveness of the soft handoff. In this paper, we also clarify the effect of interference power from mobile stations that are not in the soft handoff because of lack of wired channels. In the analysis, we model three-way soft handoff which has not been considered in past researches. We also show the effect of a call admission control to wireless quality. key words: CDMA, three-way soft handoff, blocking probability, handoff refused probability

[1]  P. Seite.  Soft handoff in a DS-CDMA microcellular network , 1994, Proceedings of IEEE Vehicular Technology Conference (VTC).

[2]  Fambirai Takawira,et al.  Performance analysis of soft handoff in CDMA cellular networks , 2001, IEEE Trans. Veh. Technol..

[3]  E. Zehavi,et al.  Soft handoff extends CDMA cell coverage and increases reverse link capacity , 1994, IEEE J. Sel. Areas Commun..

[4]  Kamyar Rohani,et al.  Analysis of CDMA range extension due to soft handoff , 1995, 1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century.

[5]  Ramjee Prasad,et al.  CDMA for wireless personal communications , 1996 .

[6]  Teng Joon Lim,et al.  Soft handoffs in CDMA mobile systems , 1997, IEEE Wirel. Commun..