An Adaptability-Enhanced Routing Method for Multiple Gateway-Based Wireless Sensor Networks Using Secure Dispersed Data Transfer

In conventional wireless sensor networks (hereinafter referred to as WSNs), the single sink node model has been employed to collect and store the measured data that can be accessed by external users of WSNs. However, the single sink model of WSNs can be the single point of failure for some usage. To counter this problem, we can employ multiple gateway-based WSNs. In addition, WSNs are susceptible to various kinds of attacks such as eavesdropping. To counter eavesdropping, we already have proposed the secret sharing scheme-based secure dispersed data transfer method (hereinafter referred to as the secure dispersed data transfer method). While we had confirmed that the secure dispersed data transfer method is effective to counter eavesdropping through the use of radio area disjoint multiple paths, we also found that the secure dispersed data transfer method cannot be effective in severe environments such as in a network with a low density of nodes. In this paper, we propose a new adaptability-enhanced routing method for multiple gateway-based WSNs by using the secure dispersed data transfer method. Our proposed method employed the gateway placement scheme, the routing scheme, and the data forwarding scheme. We also have implemented our proposed method on the QualNet simulator. We have confirmed that our proposed method can work well in severe environments such as low density networks without dramatic degradation of the data packet delivery ratio and the security.