混合MAC协议和流量分化QoS的WSN智能算法

针对无线传感器网络(WSNs)中负载很大的情况下网络能量效率较低的问题,提出了一种基于MAC协议混合流量分化QoS的WSN智能算法。为关键或时延敏感的数据包缩减了时延。首先,通过使用智能CSMA和TDMA加强方法充分利用信道；然后,同时使用广播调度和链路调度,根据网络负载动态地从广播调度切换至链路调度从而获得最佳效率；最后,利用分散处理方法完成调度,即节点在本地使用时钟算法找到时隙,并为之分配。仿真实验验证了所提算法的理论思路及高效率,结果表明,适当的变化发射功率方式降低了能量消耗,并行发射的使用进一步降低了时延。

An Intelligent Hybrid MAC with Traffic-Differentiation-Based QoS for WSN

The energy efficiency of wireless sensor networks (WSNs) is low when with high traffic load, for which a intelligent algorithm of WSN based on MAC protocol hybrid with traffic differentiation QoS is proposed. Firstly, channels are used fully by using the strength of CSMA and TDMA approach with intelligence. Then, both the broadcast scheduling and link scheduling are used, broadcast scheduling is dynamically switched to link scheduling and vice-versa depending on the network loads so as to achieving better efficiency. Finally, scheduling is done with a novel decentralized approach where the nodes locally use the clock arithmetic to find the time slot, allocated for it. The theoretical idea and the efficiency of proposed protocol have been verified by simulation experiments. Simulations results show that proposed algorithm has reduced energy consumption by suitably varying the transmit power and further reduced delay by using the concept of parallel transmission.