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 and Power Control for Device-to-Device Communication in LTE-Advanced Based on User Area Information

LTE-Advanced에서 단말간 직접 통신을 위한 영역 정보 기반 자원할당 및 전력 제어 기법

  • Li, Xiang (School of Electronic Engineering, Soongsil University) ;
  • Shin, Oh-Soon (School of Electronic Engineering, Soongsil University) ;
  • Shin, Yoan (School of Electronic Engineering, Soongsil University)
  • Received : 2014.08.19
  • Accepted : 2015.01.08
  • Published : 2015.01.30
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Abstract

In this paper, we considered the scenario that one cellular link and muti-D2D links share the same frequency resource which can improve the spectrum efficiency during uplink communication in LTE (Long Term Evolution)-Advanced network. In order to reduce the interference caused to the D2D users, we set DME (Discovery and Management Entity) which can send the area information to eNB(evolved Node B). We proposed a resource allocation scheme by using these assistant devices to reduce the interference that CUE (Cellular User Equipment) causes to DUE Rx (D2D UE Receiver). Basing on the area information, in order to mitigate the interference among the D2D pairs which share the same frequency resource, a power control scheme has been proposed. The simulation results prove that by using the DMEs, the proposed schemes improve the stability of D2D communication and bring the highest performance of the communication system when comparing to the other different schemes.

본 논문에서는 LTE (Long Term Evolution)-Advanced 상향링크에서 제한된 자원을 보다 효율적으로 사용하기 위하여 하나의 셀룰러 링크와 다수의 D2D (Device-to-Device) 링크가 자원을 공유하는 시나리오를 고려하였다. 이때, 발생하는 간섭현상을 해결하기 위하여 본 논문에서는 eNB (evolved Node B)에게 영역 정보를 알릴 수 있는 DME (Discovery and Management Entity)라는 보조 장치를 고정위치에 설치한 후, 동일한 자원을 공유하는 CUE (Cellular User Equipment)가 DUE Rx (D2D UE Receiver)에게 주는 간섭을 회피하기 위하여 DME의 영역 정보기반 자원할당 기법을 제안하였고 더 나아가, 앞에서 제기한 영역 정보를 기반으로 자원을 할당한 후, 동일한 자원을 공유하는 D2D 링크들 사이의 간섭을 완화하기 위한 전력제어 기법을 제안하였다. 모의실험을 통하여 비교 및 분석한 결과 D2D 통신의 안정성이 향상되었고 전체시스템 성능도 우수하다는 것을 검증하였다.

Keywords

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