Data collection scheme for mobile terminal in farmland WSNs

Farmland wireless sensor network is characterised by its large deployment area and the unfixed location of sink node. In order to work out a more efficient and less energy-consuming way for the mobile sink node to collect the data of the network, the paper proposed a data collection scheme for mobile terminal based on hierarchical topology—DCSMT_H. Taking the location of nodes and residual energy into account, a clustering topology was built by selecting the cluster heads in the scheme, and finally a inter-cluster data routing was constructed flexibly according to the current location of the mobile terminal. Simulation experiments showed that DCSMT_H possessed low energy-comsumption network and extend the lifetime of the network by about 15% compared with LEACH. So DCSMT_H being appliod to the mobile terminal can well fit for collecting the environmental information of large-scale farmlands. This research can provide references for improving the application of wireless sensor networks in precision agriculture.