Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Adaptive Rate Control Scheme based on Cross-layer for Improving the Quality of Streaming Services in the Wireless Networks

무선 네트워크에서 스트리밍 서비스의 품질향상을 위한 Cross-layer 기반 적응적 전송률 조절 기법

  • Kim, Sujeong (Department of Communications Engineering, Kwangwoon University) ;
  • Chung, Kwangsue (Department of Communications Engineering, Kwangwoon University)
  • Received : 2013.05.10
  • Accepted : 2013.06.13
  • Published : 2013.07.31
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Abstract

TFRC(TCP-Friendly Rate Control) has a performance degradation in wireless networks because it performs congestion control by judging all the losses occurred in wireless networks as a congestion indicator. It is also degraded by the increased Round Trip Time(RTT) due to packet retransmission and contention overhead in the link layer. In this paper, we propose an adaptive rate control scheme based on cross-layer to improve the quality of streaming services in the wireless networks. It provides new RTT estimation and loss discrimination methods to improve transmission rate of TFRC. The simulation results show that the proposed scheme can improve the performance of TFRC.

무선 네트워크에서 TFRC (TCP-Friendly Rate Control)는 불안정한 채널 특성으로 인해 발생하는 손실을 모두 혼잡 손실로 인지할 뿐만 아니라, 링크 계층에서의 재전송 기법과 채널 경쟁 오버헤드로 인해 증가된 RTT(Round Trip Time)를 적용할 경우 전송 성능이 저하된다. 본 논문에서는 무선 네트워크 환경에서 스트리밍 서비스의 품질 향상을 위한 Cross-layer 기반의 적응적 전송률 조절 기법을 제안한다. 제안하는 기법은 TFRC의 전송률 향상을 위해 새로운 RTT 측정 및 패킷 손실 구별 기법을 적용하였다. 실험을 통해 제안한 기법을 적용한 TFRC의 전송 성능이 향상됨을 확인하였다.

Keywords

References

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