Seyyed karim rahmanzadeh - Department of computer engineering, Tabriz branch,Islamic azad university, Tabriz, Iran
Ali Ghaffari - Associate professor, Department of computer engineering, Tabriz branch, Islamic azad university, Tabriz, Iran

The IoT (Internet of thing) as a new technology, using embedded sensors, interconnects thousands of intelligent objects, mobile devices and humans and collects, aggregats, and transmits data. In IoT, it is necessary to quickly aggregate and process information because of the interconnection of more nodes and the mass production of data. In the IoT network based on wireless sensor networks, as sensor nodes have many limitations such as power, radio range, memory and bandwidth, routing is one of the major challenges in WSN (Wireless Sensor Netwrk)-based IoT. In this paper, an appropriate clusteringbased routing scheme using particle aggregation optimization (PSO) algorithm (CRIP) is presented. The proposed method considers the residual energy, distance, and amount of free buffers of nodes for the cluster head (CH) selection. Simulation of the proposed method with Matlab software shows that the proposed scheme improves the energy consumption and lifetime of the IoT nodes.

IoT, Energy efficiency, PSO, Routing, WSNs