一种基于链路级功率控制的分簇路由算法

针对非均匀网络环境下链路层的能耗控制问题,提出了一种基于链路级功率控制的分簇路由算法(CLPC算法)。CLPC算法基于最优连通功率成簇,并利用双信道机制和干扰反制策略在网络层解决链路层的冲突重传及信道访问公平性等问题,以期达到提高网络整体性能的目的。最优连通功率机制可以减少网络中节点间的冲突域,降低节点间的竞争强度;双信道机制则通过控制信道和数据信道分别对数据分组和控制分组进行收发,来降低数据传输的冲突概率,提高信道的空间复用率;干扰反制策略通过对具有高发射功率的干扰节点进行反制,来保障低发射功率的节点在共享信道上的公平性。实验仿真结果表明,CLPC算法进一步提高了网络的能量有效性和网络有效吞吐量。

Clustering Algorithm Based on Link Power Control for Wireless Sensor Network

In order to solve the energy control problem of link layer in a non-uniform deploy network environment, the dissertation proposed a clustering routing algorithm based on link power control (CLPC). Based on optimal connectivity power clustering and using dual-channel mechanism with anti-control interference strategy, CLPC solves the problem of collision retransmission and channel access fairness in link layer from network layer, so as to improve the whole net- work performance. Collision and competition intension among nodes can be reduced by optimal connectivity power mechanism, and collision probability during data transmission can be decreased by dual-channel mechanism so as to lead the improvement of channel utilization. Moreover, anti control interference strategy, by anti-controlling nodes which arc high transmit power, can guarantee low transmit power nodes to ensure they can share channel fairly. The simulation re- sups show that CI_PC algorithm has a further improvement for energy efficiency and system throughput.