无线传感器网络通信的拥塞控制策略

无线传感器网络(WSNs)中的拥塞会引起数据的重传以及重传失败进而导致较长的时延、较高的数据丢失率以及较多的能量消耗。针对无线传感器通信网络自身结构特点,提出了一种基于广义混合控制器的无线传感器网络拥塞避免控制模型。分析了考虑邻近节点的无线传感器网络拥塞避免控制方案,窗口变化率、队列数据长度变化率所具有的特征,以及带有时延线性系统的混合控制器。建立模型与一般基于广义混合控制器参数对应关系和通信网络络的闭环控制系统。最后对所提出的拥塞控制策略的无线传感器网络的性能进行测试以及具体算例进行分析。结果表明:该模型能够保证通信数据传输时在满足可靠性、实时性的前提下使得网络通信性能达到最佳。

The congestion control strategy for WSNs communication

The congestion in wireless sensor networks (WSNs)can lead to longer delay time,higher packet loss ra-tio and higher energy waste due to the packet retransmission and packet drop after several retransmission failures. According to the structure feature of WSN communication system,the congestion avoidance control model based on the hybrid controller is proposed.The congestion avoidance control scheme of WSNs,the properties of variation rates including window size and length of queue data and hybrid controller of linear system with time delay are ana-lyzed in detail.The corresponding relation between the proposed model and the generalized hybrid controller and the closed loop control scheme of WSNs communication system are established.Finally,the performances of WSN using the proposed congestion control strategy are tested and the specific example is analyzed.The research results show that the proposed model can obtain the best performance under the premise that the reliability and real-time satisfy communication requirements.