摘要： 针对低功耗广域网（LPWAN）下行成本与功耗较高的问题，提出一种新的网络架构OPEN-MAC。在时分多址时槽中定义OPEN-MAC网络的操作，设计能够适配LPWAN低速率的星型网络协议栈。利用商用低成本的LPWAN设备，保证可靠的网络上行及有保障的网络下行。实验结果表明，该网络可实现节点随时接收网络下行数据，网络下行阶段的最大时间延迟不超过6 s，同时节点的功耗较低，占空比在0.3%以内。

关键词: 有保障下行, 星型网络协议栈, 时分多址, 低功耗广域网, 双向通信

Abstract: Aiming at the problem of the downlink cost and high power consumption of Low Power Wide Area Network(LPWAN),this paper proposes a new network architecture OPEN-MAC.The operation of the OPEN-MAC network is defined in the Time Division Multiple Access(TDMA) time slot,and a star network protocol stack capable of adapting to the LPWAN low rate is designed.Commercial low-cost LPWAN devices are used to ensure reliable network uplink and guaranteed network downlink.Experimental results show that the network can realize network downlink data received by the node at any time,the maximum time delay of the downlink phase of the network does not exceed 6 s,and the power consumption of the node is low,the duty ratio is within 0.3%.

Key words: guaranteed downlink, star network protocol stack, Time Division Multiple Access(TDMA), Low Power Wide Area Network(LPWAN), bidirectional communication

中图分类号: 

• TP393