Group Data Collection in wireless sensor networks with a mobile base station

In this paper, we present a novel Group Data Collection (GDC) scheme for wireless sensor networks with a mobile base station by using coding for data storage in the sensor nodes. By separately encoding a certain number of data segments in a combined segment and doing data replacement in each sensor node, the proposed GDC scheme not only provides an efficient storage method for group data, but also achieves a high success ratio of data collection. The number of necessary buffers in each sensor node can be adjusted by changing the frequency of performing data collection. The performance evaluation has been conducted through comprehensive computer simulations. It further demonstrates the feasibility and superiority of the proposed GDC scheme.