传感技术学报2018，Vol.31Issue(6)：920-926,7.DOI:10.3969/j.issn.1004-1699.2018.06.018
一种ZigBee网络中基于优先级的CSMA/CA优化算法
A CSMA/CA Optimization Algorithm Based on Priority in ZigBee Network
摘要
Abstract
The CSMA/CA is the core algorithm in MAC layer for ZigBee,which can't provide priority service and has poor performance in high load network. A new scheme is proposed,including that the priorities of different serv-ices can be rated by setting the contention window according to network load states,meanwhile,the backoff exponent of the algorithm can be adjusted adaptively with network load. The network model of the proposed algorithm is con-structed by means of Markov chain model and simulated by NS2. The simulation results show that the network throughput capacity is improved and the packet loss rate is reduced,obviously,the overall performance of the net-work is optimized with a little time delay increasing.关键词
无线传感网络/CSMA/CA/马尔科夫链模型/NS2/优先级/ZigBeeKey words
wireless sensor network/CSMA/CA/Markov chain model/NS2/priority/Zigbee分类
信息技术与安全科学引用本文复制引用
石佳川,刘剑飞,秦浩,王蒙军..一种ZigBee网络中基于优先级的CSMA/CA优化算法[J].传感技术学报,2018,31(6):920-926,7.基金项目
河北省教育厅基金重点项目(ZD2017021) （ZD2017021）
河北省高层次人才项目(C2013001048,GCC2014011) （C2013001048,GCC2014011）
