The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Analysis of the soft handoff rate in DS-CDMA cellular systems

DS-CDMA 셀룰라 시스쳄에서의 소프트 핸드오프율에 대한 분석

  • 조무호 (한국전자통신연구원 이동통신 기술연구단) ;
  • 김광식 (한국전자통신연구원 이동통신 기술연구단) ;
  • 조경록 (충북대학교 정보통신공학과)
  • Published : 1997.08.01
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Abstract

In DS-CDMA cellular systems, using the same frequency channel at the adjacent cells simultaneously makes soft handoff possible. In soft handoff, mobiles use multiple radio resources for the space diversity of signal in the overlapped region. The previous traffic models of hard handoff are not applicable to the system with soft handoff due to switching radio channels in that region. The handoff rate can be calculated by the mobility of mobiles, which is a function of the size and shape of a cell, and the speed and density of the mobiles. In this paper, we propose an analytical traffic model to study the soft handoff rate. We assume that the system uses a two-way handoff scheme for practical purposes, which connects only two cells to a mobile during soft handoff. We performed a computer simulation to confirm the accuracy of the proposed soft handoff model. The simulation results show good agreement with the analytical model.

Keywords

References

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