基于路径障碍移除模型的拓扑控制算法

he obstacles existing in the propagation path cause shadow fading. As a consequence, signal's energy is additionally consumed to overcome the influence incurred by the shadow fading. In order to solve this problem, this paper transforms the additional attenuation energy into logic distance between nodes, and structure a new model named path-obstacle-remove model based on logic distance. Next, considering that the excessive energy consumption of lower-energy nodes restricts the network lifetime, an energy-aware topology control algorithm based on path-obstacle-remove model (PORTC) is proposed. This algorithm meets the demands of practical application. Besides, it can guarantee the node does not premature deaths due to residual energy is less. Theoretic analysis and simulations validate that PORTC could ensure the connectivity and bi-directionality of network. It has good performance on robustness and sparseness. Moreover, PORTC can prolong the network lifetime significantly.