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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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The Performance Improvement for Congestion Control under TCP Traffic in Wireless Network

무선네트워크 전송기반에서 프로토콜에 의한 트래픽 혼잡제어

  • 나상동 (조선대학교 컴퓨터공학과) ;
  • 김문환 (한국전자파기지국(주)기술연구소) ;
  • 이성주 (조선대학교 컴퓨터공학과)
  • Published : 2007.10.31
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Abstract

We analyzed that the loss of data in TCP protocol based wireless networks caused by overlapped responses in bi-directional nodes that were resulted in out of the data sequence. This loss can be prevented by using revised TCP rate control algorithm and the performance of throughput can also be improved. The rate control algorithm is applied when the congestion happens between nodes while traffic packets are retransmitting in TCP bandwidth. In addition to applying the rate control algorithm, we determine the number of system clients in bandwidth and the average of pausing time between transmitting serial files to produce a competitive level so that an efficient performance of rapid retransmitting for the loss of multi-packets. This paper discusses the improvement of congestion control in that the decrease of the loss, firstly, as ensuring an efficient connection rate and, secondly, as using sliding window flow control.

무선네트워크에서 TCP버전을 통해 프로토콜을 적용하여 양방향의 노드가 중복된 응답으로 데이터가 순서에서 벗어나 손실됨을 분석하고, 개선된 비율제어 알고리즘으로 성능 처리율을 연구한다. TCP 대역폭에서 트래픽 패킷 재전송 형태를 취하면서 노드사이의 혼잡이 발생 할 경우 프로토콜과 알고리즘을 적용하였다. 또 대역폭 시스템 클라이언트 수 및 연속파일 전송 간의 평균 유휴시간을 조정함으로써 경쟁 레벨을 생성하여 다중패킷 손실에 대한 빠른 재전송 및 복구를 효율적으로 수행한다. 본 논문은 연결효율이 증가함으로서 손실이 줄어들며, 비율 기반 하에 윈도우 크기를 적절하게 조절하는 슬라이딩 윈도우 흐름제어를 이용해 손실율을 줄여서 혼잡제어 성능을 개선한다.

Keywords

References

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