Abstract
Several applications of Internet of Things (IoT) have hundreds of nodes, and the expansibility and flexibility of the network can be greatly improved if the nodes can address themselves automatically and dynamically.Existing nodes addressing methods are mainly based on the logical relationships between nodes and routers. In this paper, the automatic geographic-sensing addressing method is studied for end-node (sensor/actuator) without satellite positioning device (such as global positioning system or Beidou system) for the application of IoT deployed in a linear area. The nodes ID is determined by its geographical location, which is very important for location-based routing and transmitting strategies. First, a sniffer method is designed to realize automatic addressing in an ideal state. Then, according to the actual application scenario, two distributed ID estimation algorithms based on received signal strength indicator(RSSI) and ranging are proposed. Through the deployment of LoRa-2.4 GHz wireless node for testing, results show that when the deployment distance between nodes is greater than twice the ranging error, the reliability of our algorithm can be guaranteed.
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