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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Study on Power Allocation for Heterogeneous Networks Based on Asynchronous TDD

비동기식 TDD 기반의 이종 네트워크를 위한 전력 할당 방식 연구

  • Min, Kyungsik (School of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Taehyoung (School of Electrical and Electronic Engineering, Yonsei University) ;
  • Park, Sangjoon (School of Electrical and Electronic Engineering, Yonsei University) ;
  • Choi, Sooyong (School of Electrical and Electronic Engineering, Yonsei University)
  • Received : 2014.09.11
  • Accepted : 2014.10.08
  • Published : 2014.10.31
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Abstract

This paper analyzes the power allocation scheme to maximize the sum-rate for heterogeneous networks based on asynchronous time division duplex. We consider heterogeneous networks where a small cell exists in the macro cell coverage and the small cell and the macro cell share the same time-frequency resources. We formulate the optimization problem which maximizes the sum-rate of the heterogeneous network subject to the target signal-to-interference-plus-noise ratio. We analyze the feasible region in order for the optimal solution to exists and the optimal power allocation scheme for maximizing the sum-rate. Simulation results show that the proposed power allocation schemes outperform the maximum power transmission scheme.

본 논문은 기지국 간 상하향링크의 할당 비율이 동일하지 않은 비동기식 시분할 듀플렉싱 모드 기반의 이종 네트워크 환경에서 총 전송률을 최대화 하는 전력 할당 방식을 연구한다. 본 논문에서는 매크로 셀 커버리지 안에 같은 자원을 공유하는 소형 셀이 존재하는 이종 네트워크를 고려한다. 각 셀 마다 주어진 Target 수신 신호 대 간섭 및 잡음 비 성능을 만족하면서 각 셀의 전송률의 합을 목적 함수로 가지는 최적화 문제를 정의한다. 이를 통해 최적 해가 존재하기 위한 가시적인 영역을 분석하고 총 전송률을 최대화 할 수 있는 전력 할당 방식을 도출한다. 실험 결과를 통하여 제안한 전력 할당 방식을 사용한 전송 방식이 모든 노드가 최대 허용 전력으로 전송하는 전송 방식보다 더 높은 전송률을 달성함을 확인할 수 있다.

Keywords

References

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