摘要
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。
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 sched uling and viceversa 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, allo cated for it. The theoretical idea and the efficiency of proposed protocol have been verified by simulation experi ments. 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.
出处
《科学技术与工程》
北大核心
2014年第11期44-51,共8页
Science Technology and Engineering
基金
上海市教育委员会科研创新项目一般项目(14YS112)
国家软科学研究计划(2013GXS1D004)
教育部人文社会科学研究青年基金项目(13YJCZH122
No.12YJC630242)
国家社科基金项目(12BGL088
No.13CJY014)
上海高校选拔培养优秀青年教师科研专项基金(ZZGJD13012)资助
