LoRa无线网络的多模式时隙分配算法研究

Research on Multi-mode Slot Allocation Algorithm Based on LoRa

针对LoRa自组网络传输过程中动态改变指定区域所有节点的传输频率、所有区域内或指定区域中A类传感器采集数据传输频率的需求,在LoRa无线网络MAC协议的基础上,提出一种基于LoRa的多模式时隙分配算法,将时隙接入阶段分为普通模式和观察模式。其中,普通模式主要为正常情况下的传输任务分配时隙,观察模式同时要为正常情况下的传输任务和动态增加的传输任务分配时隙。实验结果表明,该分配算法在应对传输频率多变的情况时,提升了通信过程中的时隙利用率,降低了通信过程中的平均时延。

In response to the need to dynamically change the transmission frequency of all nodes in the designated area during the transmission of the LoRa self-organizing network,and the transmission frequency of the sensor in all areas or in the designated area,a method is proposed on the basis of the LoRa wireless network MAC protocol.Based on LoRa's multi-mode slot allocation algorithm,the slot access phase is divided into normal mode and observation mode.Among them,the normal mode mainly allocates time slots for transmission tasks under normal conditions,and the observation mode not only allocates time slots for transmission tasks under normal conditions but also for dynamically added transmission tasks.The experiment results show that the allocation algorithm can improve the time slot utilization rate in the communication process and reduce the average delay in the communication process when the transmission frequency is variable.