Journal of the Korea Society of Computer and Information (한국컴퓨터정보학회논문지)

Korean Society of Computer Information (한국컴퓨터정보학회)
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Enhanced Packet Transmission in Ad-hoc Networks using Unicast with Temporary Routing

애드혹 네트워크에서 임시 경로 설정 유니캐스트를 기반으로 한 향상된 멀티 홉 전송 기법

  • 고성현 ((주)스파이어테크놀로지) ;
  • 유성재 (숭실대학교 정보통신공학과) ;
  • 정수환 (숭실대학교 정보통신공학과)
  • Received : 2010.08.23
  • Accepted : 2010.12.27
  • Published : 2011.02.28
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Abstract

Smart packet agent is an application that is proposed to provide routing protocol and service module in ubiquitous network environment. However, it uses multi-hop broadcast, thus it causes increasing network traffic, low-speed data transmission, and the unnecessary joining nodes. In this paper, a transmit technique that uses unicast-based multi-hop to have lower network traffic and faster transmission time than the multi-hop broadcast technique. In our scheme, u-Zone Master establishes temporary routing paths by calculating moving nodes' hop-counter. Therefore, it reduces smart packet agent's network traffic and retransmission rate. Besides, this paper proposed an UDP transmission that bases on sliding window. Hence, the Stop & Wait transmission speed is improved. The results, which are taken by analyzing performance prove that the proposed scheme has better performance.

스마트 패킷 에이전트는 유비쿼터스 네트워크 환경에서 사용자들의 단말에 라우팅 프로토콜 실행모듈과 서비스 실행모듈을 동적으로 제공해주기 위해 제안된 어플리케이션 서비스이다. 하지만 기존의 스마트 패킷 에이전트는 브로드캐스트 멀티 홉 전송기법을 사용함으로 인해 네트워크 내 트래픽 증가, 구성 노드들의 불필요한 참여, 낮은 전송 속도 등의 문제점을 발생시켰다. 본 논문에서는 브로드캐스트 멀티 홉 전송기법의 패킷 전송 소요 시간을 줄이고 네트워크 트래픽을 개선하기 위한 유니캐스트 기반의 멀티 홉 전송기법을 제안한다. 유니캐스트 기반의 멀티 홉 전송기법은 u-Zone Master가 이동 노드와의 Hop Counter 계산을 통하여 임시 라우팅 경로를 설정하게 함으로써, 스마트 패킷 에이전트의 네트워크 트래픽과 패킷 재전송률을 감소시킨다. 또한 본 논문에서는 슬라이딩 윈도우 기반의 UDP 전송 방식을 제안하여 기존의 Stop&Wait 방식이 지니고 있던 낮은 전송 속도 문제를 개선하였다. 제안 방식의 개선 사항은 성능 분석의 결과로 입증한다.

Keywords

References

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