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Transmission Protocol for Cellular-Aided Device-to-Device Communication

기지국 협력 Device-to-Device 통신 전송 프로토콜 연구

  • Jeon, Sang-Woon (Andong National University, Dept. of Information and Communication Engineering) ;
  • Choi, Sang Won (Korea Railroad Research Institute, ICT Convergence Research Team) ;
  • Kim, Juyeop (Korea Railroad Research Institute, Signaling and Communications Research Team) ;
  • Shin, Won-Yong (Dankook University Dept. of Mobile Systems Engineering)
  • Received : 2016.09.30
  • Accepted : 2016.11.23
  • Published : 2016.11.30

Abstract

We study an efficient transmission protocol for the cellular-aided device-to-device communication model. In particular, two source-destination pairs communicate with the help of unlink and downlink cellular links. For the proposed scheme, two transmitters send their messages and the base station and two receivers receive at the first phase. Then, at the second phase, the base station sends the XOR of the messages to two receivers and they try to decode their own messages from the received signals after the first and second phases. We analyze the outage-based throughput achievable by the proposed scheme and demonstrate by simulations that the proposed scheme provides an improved outage performance compared to the conventional device-to-device communication schemes.

본 논문은 기지국 협력이 가능한 Device-to-Device 통신 모델에서의 효율적인 전송 프로토콜에 대해 연구하였다. 두 개의 직접통신 송수신단 쌍이 기지국의 상향링크, 하향링크 통신채널을 활용하여 독립적인 메시지를 전송하는 모델에 대해 고려하였다. 제안기법의 경우, 첫 번째 단계에서 송신단은 메시지를 전송하고 기지국과 수신단은 이를 수신하게 된다. 두 번째 단계에서 기지국은 메시지의 XOR를 수신단에게 전송하여 최종적으로 수신단은 첫 번째 단계에서 수신한 신호와 두 번째 단계에서 수신한 신호를 통하여 자신의 메시지를 복원하게 된다. 기존의 직접 통신의 경우, 자신의 메시지 디코팅에 실패하면 아웃티지가 발생하지만, 제안기법의 경우 첫 번째 단계에서 두 메시지 중 하나만 디코딩이 가능하면 두 번째 단계에서 수신한 메시지의 XOR를 통해 자신의 메시지를 복원 가능하다. 본 논문은 제안기법의 아웃티지 기반 전송율을 분석하고 또한 모의실험을 통하여 제안기법이 기존 기법 대비 아웃티지 성능을 향상시킬 수 있음을 보였다.

Keywords

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