Method and apparatus for controlling transmission of data from a plurality of sensor nodes

摘要

A method for controlling a transmission of data from a plurality of sensor nodes to a monitor node of a network is described. The method for controlling comprises a step of generating (S1) a graph for said sensor nodes and said monitor node, wherein edges of said graph connect pairs of sensor nodes to each other or connect a sensor node to said monitor node based on a distance between respective nodes. For each of said sensor nodes an associated energy level or energy consumption is obtained (S2). A weight is assigned (S3) to each edge of said graph depending on said energy level or said energy consumption and a possibility for data aggregation being of a same data type, wherein a higher energy level or a lower energy consumption of a sensor node and a higher possibility for data aggregation result in a weight increasing a probability of selecting an edge connected to said sensor node in the step of defining a routing tree. A routing tree including for each of said sensor nodes a route for transmitting said data from said sensor nodes to said monitor node is defined (S4), such that an overall weight of said routing tree is minimized if a low weight indicates a higher probability of selection or maximized if a higher weight indicates a higher probability of selection. The routes are assigned to said plurality of sensor nodes and to said monitor node.