The KIPS Transactions:PartC (정보처리학회논문지C)

Korea Information Processing Society (한국정보처리학회)
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Computing Methods of Node Traversal Time of ERS Algorithm to Reduce the Retransmission Rate in AODV Routing Protocol

AODV 라우팅 프로토콜에서 재전송률을 낮추기 위한 ERS 알고리즘의 노드순회시간 계산방법

  • 선창윤 (알앤비소프트웨어) ;
  • 강승호 (전남대학교 대학원 전산학과) ;
  • 임형석 (전남대학교 전자컴퓨터공학부)
  • Published : 2006.08.01
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Abstract

An ad-hoc network routing protocol, AODV(Ad-hoc On-demand Distance Vector) initially uses ERS(Expanding Ring Search) algorithm to control the RREQ(Route Request) retransmission in the route discovery process. Because ERS uses the fixed NTT(Node Travesal Time), it does not reflect accurately ad-hoc network environment. In this paper, we propose an improved ERS algorithm which lowers the retransmission rate. It uses RREP(Route Reply) and gives different weights in NTT of each node in accordance with the adjacency to an originating node. To show the effectiveness of the proposed algorithm, we perform a simulation using ns2. The simulation results showed that the proposed algorithm has better performance than existing algorithms.

에드 혹 네트워크에 사용되는 라우팅 프로토콜인 AODV(Ad hoc On-demand Distance Vector)는 ERS(Expanding Ring Search) 알고리즘으로 경로설정 과정에서의 라우팅 패킷 재전송을 제어한다. 그러나 기존의 ERS는 라우팅 패킷 재전송의 기준이 되는 NTT(Node Traversal Time) 계산에 이동성이 높은 네트워크 상황을 적절하게 반영하지 못한다. 본 논문은 NTT 계산에 RREP(Route Reply) 패킷을 사용하고 출발지 노드와의 인접도에 따라 각 노드의 NTT에 가중치를 달리 적용함으로써 라우팅 패킷의 재전송률을 낮추는 방법을 제안하고 ns2를 이용하여 기존의 ERS와 성능을 비교한다.

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References

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