The performance analysis for fuzzy inference system-based adaptive soft handoff thresholds

To improve the performance of conventional soft handoff for a cellular code division multiple access system, one possible method is to adapt the soft handoff thresholds. This paper performs of soft handoff with adaptive thresholds using fuzzy inference system is analyzed. The cell breathing-based pilot signal and the traffic load balance equation are also applied in the model. The analyzed results show that the proposed method can give lower blocking probability than the conventional soft handoff. In addition, the trunk-resource efficiency is improved.

[1]  Andrew J. Viterbi,et al.  On the capacity of a cellular CDMA system , 1991 .

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

[3]  Dong-wan Tcha,et al.  Load analysis of the soft handoff scheme in a CDMA cellular system , 2001, IEEE J. Sel. Areas Commun..

[4]  R. Steele,et al.  Effect of soft and softer handoffs on CDMA system capacity , 1998 .

[5]  Sung-Hyuk Shin,et al.  Design aspects and system evaluations of IS-95 based CDMA systems , 1997, Proceedings of ICUPC 97 - 6th International Conference on Universal Personal Communications.

[6]  Y. Kinoshita,et al.  Robustness analysis of new fuzzy handover control for indoor cellular telephone , 1995, Proceedings of ICUPC '95 - 4th IEEE International Conference on Universal Personal Communications.

[7]  Stephen S. Rappaport,et al.  Traffic model and performance analysis for cellular mobile radio telephone systems with prioritized and nonprioritized handoff procedures , 1986, IEEE Transactions on Vehicular Technology.

[8]  Seong-Lyun Kim,et al.  Soft handoff algorithm with variable thresholds in CDMA cellular systems , 1997 .

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

[10]  Katsutoshi Tsukamoto,et al.  The Effects of Varying Soft Handoff Thresholds in Cellular CDMA System , 2004 .

[11]  Changeon Kang,et al.  A channel assignment scheme for reducing call blocking rate in a DS-CDMA cellular system , 1997, Proceedings of ICUPC 97 - 6th International Conference on Universal Personal Communications.

[12]  W. Benjapolakul,et al.  A handover decision procedure for mobile telephone systems using fuzzy logic , 1998, IEEE. APCCAS 1998. 1998 IEEE Asia-Pacific Conference on Circuits and Systems. Microelectronics and Integrating Systems. Proceedings (Cat. No.98EX242).

[13]  X. H. Chen,et al.  A novel adaptive traffic load shedding scheme for CDMA cellular mobile systems , 1994, Proceedings of ICCS '94.