基于轮询控制的无线传感器网络MAC协议性能分析

Performance analysis of wireless sensor network MAC protocol based on polling control

为解决网络性能均衡问题,提出一种一队列两服务的轮询控制策略,用于无线传感器网络的媒体接入控制中.首先,在该轮询控制策略中,一个队列根据系统总负载率按概率采取门限和完全两种服务,采取完全服务的概率与采取门限服务的概率相加等于1;其次,对控制策略模型进行了系统分析,用控制流程的方法对模型进行了描述;然后,通过Matlab实现了控制策略模型仿真,并将其与完全服务和门限服务进行了对比,实验结果表明,该控制策略可以达到均衡网络性能的效果;最后,对现有MAC帧结构进行了分析,提出将现有帧结构重新设计以实现该轮训控制策略,说明了该控制策略在实际网络中的可行性.

In order to solve the problem of network performance balance, a polling control strategy of two queues was proposed, which was used for media access control of wireless sensor networks. First, in the polling control strategy, one queue took gated service and exhaustive service according to the probability of the total load rate of the system. The probability of taking the threshold service plus the probability of taking exhaustive service was equal to 1. Second, the control strategy model was systematically analyzed, and the model was described by the control flow method. Then, the simulation of the new control strategy model was realized by Matlab, and it was compared with the experimental results of the exhaustive service and threshold service under the same conditions.The experimental results showed that the control strategy can achieve the effect of balancing network performance.Finally, the existing MAC frame structure is analyzed, and the existing frame structure is redesigned to realize the rotation training strategy. The feasibility of the control strategy in the actual network is illustrated.