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

  • 제27권6B호
  • /
  • Pages.559-568
  • /
  • 2002
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  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

멀티미디어 CDMA에서 전송률 적응을 고려한 선택적 전력 제어 알고리즘

Selective Power Control considering Transmission Rate Adaptation for a Multimedia CDMA system

  • 이재호 (인하대학교 정보통신대학원 정보통신공학과 통신공학연구실) ;
  • 곽경섭 (인하대학교 정보통신대학원)
  • 발행 : 2002.06.01
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 이산적인 전송률 집합을 가진 실제 시스템에서 구현 가능한 가변 전송률 제어 및 전력 제어를 결합하는 알고리즘에 대하여 연구하였다. 이와 같은 연구는 문헌 [1]에서 선택적 전력 제어 (SPC)라는 알고리즘으로 제시되었지만, 사용자의 최소 전송률 보장과 신호대 간섭비의 변화에 따라 전송률 변화가 빈번하게 발생한다는 문제점을 가지고 있다. 본 논문에서는 전송률 적응을 고려하여 기존의 선택적 전력 제어 방법의 문제점을 해결하기 위한 새로운 모델과 반복 연산 알고리즘을 제시하였다. 그리고 수치 해석 및 모의 실험을 통해 보다 안정되고 낮은 전송 전력으로 향상된 효율을 가짐을 증명하였다.

In this paper, we studied on combining the control of transmission fates and power for the real system where a finite set of transmission rates are used. In [1], the combined control of transmission rates and power was first researched, and suggested the Selective Power Control (SPC) algorithm. However, it can't guarantee the minimum rate to each user and results in frequent changes of rate due to oscillation of the SIR (Signal to Interference Ratio) values. As a main purpose of this paper, we derive a formulation model and propose a distributed iteration algorithm to solve these problems. To evaluate the performance of the proposed algorithm, we carried out numerical analysis and computational experiments. The results indicate that the proposed algorithm achieves better throughput than conventional one by keeping the low average transmission power.

키워드

참고문헌

  1. IEEE VTC. Combined Power Control and Transmission Rate Selection in Cellular Network S.L.Kim;Jens Zander
  2. Proc. IEEE ICUPC Throughput performance of adaptive modulation in cellular systems X.Qiu;K.Chawia
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