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在无线传感网SMAC协议的基础上,提出了一种基于机会公平竞争退避机制的媒体接入控制协议(OF-MAC)。该机制综合考虑节点当前的吞吐率和节点当前信道状态,引入了新的退避时间的计算方法,能够兼顾无线传感网节点间的公平性和网络吞吐率。实验表明,该方法在节点公平性和网络吞吐率方面都取得了较好的表现,且能够根据需要自由调整两者的性能。该方法只需要在SMAC协议的基础上做简单的改动,易于实现。
Based on SMAC protocol of Wireless Sensor Network (SMAC), a media access control protocol (OF-MAC) based on opportunistic fair competition backoff mechanism is proposed. Considering the current throughput of the node and the current channel status of the node, this mechanism introduces a new calculation method for backoff time, which can balance the fairness and network throughput of nodes in the wireless sensor network. Experiments show that the proposed method achieves good performance both in node fairness and network throughput rate, and can freely adjust the performance of both. This method only needs to make the simple change on the basis of SMAC agreement, easy to realize.