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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Downlink Parallel Transmit Power Control Algorithm during Soft handover for WCDMA System

WCDMA 소프트 핸드오버 시 하향 병렬 전송 전력 제어 알고리즘

  • 한영욱 (한양대학교 전자통신전파공학과대학원 응용통신연구실) ;
  • 서경진 (한양대학교 전자통신전파공학과대학원 응용통신연구실) ;
  • 박승권 (한양대학교 전자전기컴퓨터공학부)
  • Published : 2005.04.01
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Abstract

This paper for establishing the reliability of the TPC command is introduced, where the soft symbol of the TPC command itself is directed used as a reliability indicator. In addition to the new reliability estimation, the concept of parallel use of TPC algorithms is presented. The results show that the soft symbol reliability estimation decrease the $P_{tx}$ levels with 0.3 dB, thus providing a useful capacity gain. The parallel use of 2 to 4 algorithms is also shown to decrease the sensitivity of the algorithms to the algorithm thresholds used, and thus increase the feasibility of the algorithms in a real world networks.

본 논문에서는 무선 인터페이스에서 최저의 간섭 레벨을 유지하고 요구된 QoS를 제공하기 위해 사용되는 SIR(signal-to-Interference Ratio) 기반의 폐루프 전력 제어 알고리즘 대신 Soft Symbol을 이용한 Soft Symbol 알고리즘과 함께 병렬 알고리즘을 적용한 폐루프 전력 제어에 대한 연구를 하였다. SIR 기반 알고리즘과 Soft Symbol 기반 알고리즘을 이용한 전력 제어에 대한 성능 평가를 하여 Soft Symbol 기반 알고리즘을 이용한 전력 제어 성능이 향상 되었고, 병렬 알고리즘을 이용한 폐루프 전력 제어에서는 SIR 기반의 전력 제어보다 $15\sim20\%$의 우수한 성능을 보였다.

Keywords

References

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