A novel dynamic power consumption management(DPCM) method is proposed for the sink node of wireless sensor networks (WSN),in which the sleeping threshold of each node in sleeping status is deduced theoretically by utilizing the uniformly minimum variance unbiased estimation(UMVUE) of fixed truncated samples to obtain the parameters of idle duration that obey the Pareto distribution.

This paper proposes the design principle of sink node of the Wireless Sensor Network(WSN), analyzes the characteristic and requirement of the sink node, and makes the choice of devices.

In WSN,the position of sink node is related to the per-formance and life-time of the network,and is tightly bond up with the deployment and topology of it.

Designed with sensor-node and sink-node,along with temperature sensors,humidity sensors and light-intensity sensors used,the hardware can examine each greenhouse environment parameter automatically.

The function and work principle of the sink-node in wireless sensor network are analyzed.

The algorithm based on multi-sink node tree-construction protocol was proposed and the software was designed to detect,monitor and alarm thirteen operation modes,such as weaving,warp stopping and filling stopping.

Delay analysis of single-hop wireless sensor network with mobile sink;

A data collection method is proposed to support hybrid sink mode in wireless sensor networks where static and mobile sinks coexist.

A autonomous mobile sink mechanism is proposed,which set sink begin to move when the change of data traffic form single-hop neighbor is extremely obvious.