Wireless sensor network and construction method, data transmission scheduling method and device

The embodiment of the invention provides a wireless sensor network, a network topology construction method of the wireless sensor network and a data transmission scheduling method and device applied to the wireless sensor network. The wireless sensor network comprises N sensor nodes and one sink node, wherein the N sensor nodes are divided into n groups, each group of the sensor nodes are divided into Nbranch branches, and the Nbranch is the maximum branch number capable of being scheduled in parallel in the wireless sensor network; the number of the sensor nodes on each branch of the corresponding group of the sensor nodes is equal or with the discrepancy of a predetermined number, and the angle between two adjacent branches is 360 degrees per Nbranch. According to the embodiment of the wireless sensor network, the construction method and the data transmission scheduling method and device, in the tree topology wireless sensor network, by the application of the data transmission scheduling method, the scheduling efficiency can be improved.