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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Resource Allocation Scheme for D2D Communications in Multi-Cell Environments

다중 셀 환경에서 단말 간 직접 통신을 위한 자원 할당 방식

  • Oh, Sung-Min (Wired & Wireless Access Research Department, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Lee, Changhee (Wired & Wireless Access Research Department, ETRI) ;
  • Yun, Miyoung (Wired & Wireless Access Research Department, ETRI) ;
  • Shin, Jaesheung (Wired & Wireless Access Research Department, ETRI) ;
  • Park, Ae-Soon (Wired & Wireless Access Research Department, ETRI)
  • Received : 2014.07.07
  • Accepted : 2014.10.08
  • Published : 2014.10.31
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Abstract

This paper proposes a resource allocation scheme suitable for D2D communications in multi-cell environment. In order to solve the inter-cell interference, the proposed scheme allocates the pre-assigned resource group and shares the information with neighbor cells. This paper also proposes a power control scheme for D2D communication to enhance the cell throughput. By the simulation results, the average SINR of the cellular uplink and D2D communication link are mostly higher than 10 dB when the proposed scheme is applied. On the other hand, with the inter-cell non-coordinated resource allocation scheme, the average SINR of the D2D communication link are decreased by 0 dB. In addition, the proposed scheme can enhance the cell throughput up to 8 % compared with the inter-cell non-coordinated resource allocation scheme.

본 논문에서는 다중 셀 환경에서 단말 간 직접 통신 (D2D: Device-to-Device)에 적합한 자원 할당 방식을 제안한다. 제안한 방식은 셀 간 간섭을 해결하기 위해 D2D 통신을 위한 자원 그룹을 할당하고, 이러한 자원 정보를 이웃 셀과 공유하는 절차를 수행한다. 또한, 셀 간 간섭을 감소시키기 위해 D2D 통신 링크 간 파워 조절 기법을 제안한다. 시뮬레이션 결과에 의하면, 셀 간 협력 자원 할당 방식은 셀룰러 상향링크와 D2D 통신 링크의 평균 SINR (Signal-to-Noise Ratio)을 10 dB 이상 유지시킬 수 있는 반면, 셀 간 비협력 자원 할당 방식은 D2D 통신링크의 평균 SINR이 0 dB 까지 저하되었다. 또한, 제안한 방식은 셀 간 비협력 자원 할당 방식보다 셀 처리율을 8 % 향상시킬 수 있었다.

Keywords

References

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