CAJ | 학술논문

间断连接无线网络中的节点以协作方式完成消息投递，恶意节点将严重影响网络性能。利用节点历史行为信息，该文提出一种恶意节点容忍的消息转发策略，节点结合直接观察信息与邻居节点的推荐信息，通过动态推荐声誉阈值感知节点恶意行为，进而利用证据理论量化节点信任度，从而检测网络中串谋及独立的恶意节点，为消息选择最优的转发节点。结果表明，在带有串谋的恶意攻击下，所提出的消息转发策略能准确检测出恶意节点，并显著提高消息投递率，改善平均时延。
간단련접무선망락중적절점이협작방식완성소식투체，악의절점장엄중영향망락성능。이용절점역사행위신식，해문제출일충악의절점용인적소식전발책략，절점결합직접관찰신식여린거절점적추천신식，통과동태추천성예역치감지절점악의행위，진이이용증거이론양화절점신임도，종이검측망락중천모급독립적악의절점，위소식선택최우적전발절점。결과표명，재대유천모적악의공격하，소제출적소식전발책략능준학검측출악의절점，병현저제고소식투체솔，개선평균시연。
Packets in ICWN (Intermittently Connected Wireless Network) are delivered in a cooperation manner between nodes, which means the existence of malicious nodes will degrade the network performance. A malicious node tolerant message forwarding mechanism is proposed in this paper. By exploiting the historical node behavior information, directly observed information is combined with the recommendation information from neighbor nodes to perceive malicious node behavior according to the dynamical reputation threshold. Consequently, evidence theory is utilized to quantify the node relation to detect malicious nodes, and then the optimal relay nodes selecting can be achieved. Results show that, under the attack of collaborating malicious nodes, malicious nodes can be accurately identified by the proposed mechanism, which leads to the notably improving packet delivery ratio and average delay.