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基于预警优先级的ZigBee传感网络MAC层退避算法 被引量：2

The Early-Warning Priority-Based ZigBee Sensor Network MAC Layer Backoff Algorithm
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摘要 针对无线传感器网络中有预警信息的高优先级数据包需要尽快传输,且IEEE 802.15.4协议本身不支持任何优先级传输机制的情况,提出了一种基于预警优先级的非时隙CSMA/CA自适应调整阶梯退避算法,并建立了离散时间马尔可夫分析模型,比较分析了网络中不同优先级节点的信道接入概率、网络吞吐量和传输延时,仿真结果表明,改进的自适应调整阶梯退避机制对提高无线传感器网络中高优先级数据包的实时传输性能具有积极的作用。 The early warning information of high priority packets in wireless sensor network needs to be transmitted quickly. And IEEE 802.15.4 protocol doesn＇t sustain any priority transmission mechanism. Based on this situation, an unslotted CSMA/CA adaptive adjustment of step backoff algorithm is proposed on early warning priority, and model Discrete time Markov analysis. Meanwhile, the channel access probability, network throughput and transmission delay are compared and analysed for the different priority nodes in network. Adaptive adjustment of the improved step backoff probability mechanism has positive effects on improving real time transmission performance of high priority packets in wireless network.
作者 梁利生 周国华 武兰民 吕玉祥
机构地区 太原理工大学物理与光电工程学院 山西省电力公司大同供电分公司 国家电网公司
出处 《电子器件》 CAS 北大核心 2014年第5期937-943,共7页 Chinese Journal of Electron Devices
关键词 IEEE 802.15.4 非时隙CSMA/CA 马尔可夫链 退避算法 ZIGBEE IEEE 802.15.4 unslotted CSMA/CA Markov chain backoff algorithm ZigBee
分类号 TN915.01 [电子电信—通信与信息系统]
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参考文献14

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二级参考文献22

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共引文献51

同被引文献19

引证文献2

二级引证文献10

电子器件
2014年 第5期

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