CAJ | 학술논문

为了优化ZigBee网络媒体接入控制( Media access control,MAC)协议性能,提出一种基于饱和负载的MAC层信道访问机制。通过马尔科夫链对网络节点状态转化过程建模,对基于信道访问机制的网络吞吐量和节点能耗进行了数学分析。研究了网络参数NB、aminBE对节点信道冲突概率、网络吞吐量和能耗等性能的影响。分析结果表明：该模型准确地描述了基于饱和负载的ZigBee网络信道访问机制,对协议参数进行合理的设置能够改进MAC协议吞吐量和能耗性能。
위료우화ZigBee망락매체접입공제( Media access control,MAC)협의성능,제출일충기우포화부재적MAC층신도방문궤제。통과마이과부련대망락절점상태전화과정건모,대기우신도방문궤제적망락탄토량화절점능모진행료수학분석。연구료망락삼수NB、aminBE대절점신도충돌개솔、망락탄토량화능모등성능적영향。분석결과표명：해모형준학지묘술료기우포화부재적ZigBee망락신도방문궤제,대협의삼수진행합리적설치능구개진MAC협의탄토량화능모성능。
To optimize the performance of media access control( MAC) protocol for ZigBee network,a mechanism based on saturated traffic for channel competitive access is proposed. This paper establishes a Markov chain model for the process of node state transition. The numerical analysis of throughput and node average power consumption based on the mechanism is carried out. The impact of protocol parameters such as NB and aminBE on the performance of conflict probability,throughput and node average power consumption is researched. The results show that this model can describe the mechanism of channel competitive access well and that the reasonable settings for parameters can improve the performance of the MAC protocol.