CAJ | 학술논문

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。
침대무선전감기망락중유예경신식적고우선급수거포수요진쾌전수，차IEEE 802.15.4협의본신불지지임하우선급전수궤제적정황，제출료일충기우예경우선급적비시극CSMA/CA자괄응조정계제퇴피산법，병건립료리산시간마이가부분석모형，비교분석료망락중불동우선급절점적신도접입개솔、망락탄토량화전수연시，방진결과표명，개진적자괄응조정계제퇴피궤제대제고무선전감기망락중고우선급수거포적실시전수성능구유적겁적작용。
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.