A method for hierarchical energy power balance in wireless sensor network

The invention discloses a classified energy consumption balancing method of a wireless sensor network, which comprises the following steps: a. All the sensor nodes relevant to perception are organized to a class; a retransmission path in the class is established; b) the energy consumption balance of each node in the class is realized; c) a path between each class and other adjacent class is established; d) a base station uses a certain class head as a source node and selects a path with the longest life-span from a plurality of transmission paths as the best transmission path, thereby well realizing the energy consumption balance between classes based on a plurality of paths. Through a mixing transmission mode of combining hop-by-hop transmission and direct transmission and the data transmission between adjacent paths, the invention reduces the difference of energy consumption between nodes in the class and realizes the energy consumption balance between the classes through selecting the path with high residual energy from a plurality of paths; the method has the main advantages of effectively reducing the energy consumption difference of the whole wireless sensor network, thereby prolonging the life-span of the network.