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

Atsushi NAGATE  Masashi SUGANO  Masayuki MURATA  Hideo MIYAHARA  

IEICE TRANSACTIONS on Communications   Vol.E84-B   No.3   pp.520-526
Publication Date: 2001/03/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Innovative Mobile Communication Technologies at the Dawn of the 21st Century)
CDMA,  three-way soft handoff,  blocking probability,  handoff refused probability,  

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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.