Abstract:

Frequent topology changes in wireless sensor network has important significance in improving efficiency of routing protocols and MAC protocol，prolonging the survival time of network and raising the efficience of communication. Based on systematic analysis some topology control algorithms，a new hiberarchical topologically generating algorithm is put forwarded in this paper，two parameters-time threshold and energy of node left are introduced and a relatively positive attitude is taken to solve imbalance energy consumption of nodes. The algorithm effectively balances the energy consumption and achieves an obvious improvement on the survival time of network.

Key words: wireless sensor network, topology control algorithm, positive, energy of node left