A proposal of sensor data collection system using mobile relay nodes

In recent years, the demand for wireless sensor network that present valuable information to users is increasing rapidly. However, in achieving wireless sensor network, the communication channel from the nodes to the data centers purchase a problem, especially in respect to the cost of furnishing IP/mobile networks for each and every one of the nodes. Many researches attempt to tackle this problem, but they generally limit either the types of sensors used or the distances among the sensors. In this paper, we propose a new sensor data collection system model in which mobile relay nodes transport the sensor data to the data center. We ran simulations under conditions imitating the real world to verify the practicality of the proposed system, This simulation uses data accumulated from traffh surveys to closely imitate pedestrians in the real world. We evaluated that the proposed system has sufficient ability for use in urban sensing systems that are not under the real-time constraint.