CAJ | 학술논문

针对移动自组织网络路由的可靠运行和安全保障问题,提出一种基于Dempster-Shafer证据理论的节点信任评估模型。利用历史交互信息计算直接信任度,通过邻居节点的推荐度量值获取间接信任度。对直接和间接信任度进行权重修正后根据Dempster组合规则合成,得到节点全局信任度。利用该模型对优化链络状态路由协议的多点中继技术进行优化,设计改进的路由协议TOLSR。仿真结果表明,TOLSR协议能发现和抑制网络的自私节点和恶意节点,有效提高移动自组织网络的可靠性,证明了该信任度评估模型的有效性和合理性。
침대이동자조직망락로유적가고운행화안전보장문제,제출일충기우Dempster-Shafer증거이론적절점신임평고모형。이용역사교호신식계산직접신임도,통과린거절점적추천도량치획취간접신임도。대직접화간접신임도진행권중수정후근거Dempster조합규칙합성,득도절점전국신임도。이용해모형대우화련락상태로유협의적다점중계기술진행우화,설계개진적로유협의TOLSR。방진결과표명,TOLSR협의능발현화억제망락적자사절점화악의절점,유효제고이동자조직망락적가고성,증명료해신임도평고모형적유효성화합이성。
Specific to reliability and security problems in Mobile Ad Hoc Network( MANET) ,a trust evaluation model based on Dempster-Shafer( D-S) evidence theory is proposed. Direct trust degree is calculated with historical interaction information and indirect trust is obtained from neighbor nodes’ commendations. The direct trust degree and indirect trust are combined according to Dempster combination rule after being amended with weight,to obtain node’ s comprehensive trust finally. On this basis, it optimizes the Multi-point Relaying ( MPR ) technology in Optimized Link State Routing Protocol(OLSR),and proposes an improved routing protocol ( TOLSR). Simulation result shows that the model can discoveries selfish nodes and malicious nodes,thus effectively improves the reliability of MANET,which also proves the validity and rationality of the trust evaluation model.