科研成果详情

在无线传感器网络（Wireless Sensor Networks,WSNs）中引入移动节点可以极大地提升网络性能。然而,移动节点一旦被蠕虫感染则会大大加快蠕虫在WSNs中的传播。针对这一新的研究问题,该文分2步来抑制和清理移动蠕虫传播源。首先建立了移动蠕虫感染模型,设计启发式算法以确定移动感染区域的边界,通过挂起感染边界附近的高风险节点来阻断蠕虫的进一步传播。第2步设计定向扩散的良性蠕虫对网络中被感染的节点进行修复,以彻底清除蠕虫病毒。理论分析和仿真实验结果均表明,该文所提方法能够在付出较小的代价下达到较好的移动蠕虫清理效果,适合能量受限的无线传感器网络。 

The network performance of WSNs (Wireless Sensor Networks) can be improved significantly by injecting mobile elements. However, the infection process of worm will be greatly accelerated once the mobile element has been captured and become the new infection source. To cope with this new threat, this paper first proposes the infection model for the networks with the mobile worm and designs a heuristic algorithm to identify the boundary of infected area. High risk nodes near the boundary can be found and switched to sleeping states to block the further spreading of the worm. Second, an algorithm with directed-diffusion based anti-worm is designed to repair those infected sensors. Theoretical analysis and experimental results show that the proposed methods can achieve better worm cleaning effect with low cost, which can be applied to energy-limited wireless sensor networks.