A Routing Protocol For Emergency Response Based On Global Information Decision In IoTs

Internet of Things (IoTs) has been applied in many fields, such as environment monitoring systems and industrial control system. In recent years, wireless sensor networks (WSNs) have become the key technology of IoTs. Due to the increasing of network size, how to ensure real-time emergency response ability during the transmission is one of the most critical research aspects in the network.In this dissertation, we propose a routing protocol for Emergency Response Based on Global Information Decision (ERGID), which aims to improve the performances of reliable data transmission and efficient fast response for emergency in IoTs. Due to the current real-time routing protocols should meet requirements of the limitation of energy consumption and the increase of network size, local information routing decision is adopted. However, the local information routing decision has its own blindness which may lead to the problem of ignoring valid path. In this dissertation, we design and implement Delay Iterative Method (DIM) to provide the routing decisions for forwarding node. Meanwhile, we propose and adopt REPC mechianism by considering residual energy of node in order to help us to balance the load of network and provide the reliable transmission path for data forwarding.Finally, we use NS2 simulation and hardware nodes based on STM32W108 to compare the performances of ERGID protocol with SPEED protocol and EA-SPEED protocol in terms of E2E delay, packet loss and energy consumption of node. The experiments prove that the ERGID protocol has lower E2E delay, packet loss rate, and a balanced ratio of energy consumption of node among the three protocols.