Routing Algorithm with High Credibility and Stability (RACS) in WWSN-based Internet of Medical Things

Due to the massive development of the wearable technology and widespread use of wearable devices, the Wearable Wireless Sensor Network (WWSN)-based Internet of Medical Things (IoMT) has appeared to become a hot research topic. In WWSN-based IoMT, the users equipped with wearable wireless sensors moving at their will raises a challenge to the routing. Routing algorithms in WWSN proposed by previous works mainly cover the energy consumption of nodes and network delay. However, seldom works pay close attention to the link stability, which is a vital parameter of the network performance. In fact, the mobility of user equipped with wearable sensor nodes can severely influence the link stability. In addition, to ensure the information safety during packet forwarding, the credibility of node is concerned in this paper. We propose a routing algorithm based on credibility and stability (RACS), with taking link maintenance time, the node congestion, the residual energy of node, the credibility of node, and path length into consideration. The routing path with the maximum credibility and stability (CS) is selected as the optimal path. Simulation results show that the proposed RACS algorithm outperforms better in packet forwarding rate, which indicates that the routing path is more stable than others. Meanwhile, the performance of RACS algorithm in terms of energy consumption and delay is close to the other two algorithms. Therefore, the proposed algorithm can provide higher credibility and stability for WWSN-based IoMT.