基于动态占空比MAC协议研究

Study on MAC protocol of the dynamic duty cycle

在无线传感器网络中,降低能耗会引发端到端时延的增加.为兼顾能耗和时延的均衡,提出一种基于缓冲区平均队列时延的动态占空比MAC协议.该协议通过缓冲区平均队列时延对网络负载进行检测,能及时准确地预测网络负载变化情况,从而对占空比进行实时调整.同时采用节点能量指数对缓冲区队列时延进行加权平均,限制了节点能量的过度使用,延长了网络寿命.仿真结果表明,改进后的AQD-MAC协议在能量消耗和网络时延方面都存在明显的优势.

In a wireless sensor network, reduce the energy consumption will result in higher latency. For the balance of energy consumption and delay, this paper put forward a dynamic average queue delay buffer based on duty cycle MAC proto- col. The protocol was used to detect the network load by the average queue delay buffer, to forecast the change of network load timely and accurately, thus the duty cycle was adjusted in time. At the same time, the buffer queue delay was weighted average using the node energy index, limited the excessive use of node energy, prolonged the network lifetime. The simula- tion results showed that the improved AQD - MAC protocol has obvious advantages in terms of energy consumption and net- work delay.