CAJ | 학술논문

目前，IEEE 802.15.4/ZigBee网络CSMA/CA接入机制中退避值的初始值采取了固定设置模式，难以适应不同的网络应用环境，从而对ZigBee网络的时延、能耗、吞吐量等性能造成了一定的负面影响。文章提出一种基于自适应退避值的Zigbee网络CSMA/CA接入机制，旨在通过动态调整退避指数和竞争窗口长度，自适应节点数据传输情况，达到提高网络性能的目的。仿真结果表明，文章所提出的自适应接入机制在提高ZigBee网络吞吐量、降低能耗等方面优势较为明显。
목전，IEEE 802.15.4/ZigBee망락CSMA/CA접입궤제중퇴피치적초시치채취료고정설치모식，난이괄응불동적망락응용배경，종이대ZigBee망락적시연、능모、탄토량등성능조성료일정적부면영향。문장제출일충기우자괄응퇴피치적Zigbee망락CSMA/CA접입궤제，지재통과동태조정퇴피지수화경쟁창구장도，자괄응절점수거전수정황，체도제고망락성능적목적。방진결과표명，문장소제출적자괄응접입궤제재제고ZigBee망락탄토량、강저능모등방면우세교위명현。
At present, the initial backoff value is usually set as fixed value in the CSMA/CA access mechanism of IEEE 802.15.4/ZigBee. Because this set model can hardly adapt to different network application environment, the performance such as delay, energy consumption and throughput in ZigBee network is affected negatively. In this paper, a CSMA/CA access mech-anism based on adaptive backoff values is proposed for purpose of enhancing the network performance by dynamic adjusting BE and CW length. The simulation results prove that the adaptive access mechanism proposed in this paper has obvious advan-tages in enhancing the network throughput and reducing energy consumption.