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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Optimal Relays for Cooperative ARQ Protocol Based on Threshold of Distance

  • 단디쉬엔 (울산대학교 전기전자정보시스템 공학부 무선통신 연구실) ;
  • 공형윤 (울산대학교 전기전자정보시스템 공학부 무선통신 연구실)
  • Published : 2008.04.30
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Abstract

Retransmission signals from relays to destination when the destination fails to decode received signal from the source in Automatic Repeat Request (ARQ) protocol make the destination receive signals more reliably. With using omni -direction antenna in the practical system, in communication range of both the source antenna and the destination antenna, there are some relays that can be used to transmit signal to the destination. However, using all relays to transmit signal consume power and bandwidth. In this paper, we propose a new protocol in which the best relays are chosen based on threshold of distance from the source to the relay and the relay to the destination when the relays use decode- and forward (DF) protocol. Simulation results prove the efficiency of the protocol when we compare using only the best relays with using all relays to transmit signal to the destination.

Keywords

References

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