摘要
为了有效提高IEEE802.15.4 MAC协议的能量有效性,建立IEEE802.15.4时隙CSMA/CA的Markov分析模型,并且提出一种实时数据占空比自适应算法。利用NS2仿真软件,分析了协议参数对能耗的影响,特别是根据提出的算法对网络中节点的状态进行判定,是否需要改变占空比。仿真结果表明,网络性能获得提升,节点能耗下降并跟理论分析结果较吻合。
To improve the energy-efficiency of IEEE802.15.4 MAC, a Markov-based analytical model is set for IEEE802.15.4 slotted CSMA/CA.And a duty cycle adaptation to real-time data algorithm is proposed.The impact of protocol parameters is analyzed by NS2.Moreovcr,the need to change the Duty Cycle is discussed by determining the state of node based on the proposed algorithm.h is showed that the network performance could be improved.And the decrease of the energy consumption also matehes with the simulations.
出处
《无线电工程》
2017年第5期6-9,36,共5页
Radio Engineering
