基于组合指标的无线传感器网络安全路由算法

Combination routing metric based routing algorithm for WSN

针对无线传感器网络路由安全与可靠性的问题,提出了一种基于组合指标的安全路由算法。评估节点通过观测被评估节点的数据包转发行为,计算直接信任值,然后与第三节点推荐的信任值进行加权求和,得到一个综合信任值。为了提高信任的准确性,避免出现合谋攻击,对第三方推荐的信任值进行了信任相似度检测。通过对期望传输次数和信任值进行加权组合,形成一个用于选择下一跳节点的组合路由指标。最后,对所提出的算法进行了仿真验证。结果表明,所提出的算法能够有效地避免恶意节点的攻击,在传递率和总的传输次数方面明显优于其他算法。

For the secure and reliable problems of routing in wireless sensor networks, a combination routing metric based routing algorithm is proposed. The evaluating, node computes the direct trust value by observing the behaviors of the evaluated node. A comprehensive trust value can be achieved via the weighted combination of direct trust value, the indirect trust value that is from the recommendations of other nodes. In order to improve the accuracy of trust and avoid the collusion attack, making a comparison of the degree of similarity for the trust value that other nodes recommend. A combination routing metric which is used to select the next hop is formed via weighted combination of the excepted transmission count and trust value. Finally, some simulations are made for the proposed algorithm. The simulation results show that the proposed algorithm can effectively avoid the attack of malicious nodes. Compared with other algorithms, the proposed algorithm has good performances in the deliver ratio and the total transmissions.