Gateways Selection for Integrating Wireless Sensor Networks into Internet of Things

This paper presents an approach to integrate Wireless Sensor Networks into Internet. In WSN some sensors have two radio components: Zigbee radio which used on all sensors to send data within the WSN and WiMax radio which activated only on subset of sensors, indicated to as gateways, for sending data to Internet. Objective of our approach is to increase lifetime and throughput of WSN where sensors can join the Internet through gateway, to achieve this goal, we use link cost to select gateway. The link cost is the ratio between distance to Internet and energy level of sensor. The sensor has been selected as gateway which has minimum link cost. To ensure minimum link cost can be performed, we divided WSN into grids where, gateways have been selected in each grid. Results justify its accuracy.