基于洪泛机制准同步的UWB定位效率优化研究

Optimization of ranging algorithm based on flooding mechanism and hash operation

摘要:

针对UWB定位中的标签容量限制和通信冲突的问题，提出了一种基于洪泛机制准同步的改进定位方法。该方法通过设置主从基站，利用洪泛机制逐级传递准同步报文实现基站和标签间的时钟准同步，满足了DS-TWR方法下TOA算法对通信中时钟误差的需求，从而提高了测距精度；同时通过多Hash运算为标签基站对分配唯一时隙，有效提高了多标签情况下的通信成功率。实验结果表明，改进后的系统多标签条件下平均通信成功率提高了16%，标签能耗降低了30%，单位时间内获取数据量提高了27.8%，在提高系统通信效率的同时降低了能耗，具有较高的工程应用价值。

Abstract:

Aiming at the problems of label capacity limitation and communication conflict in UWB location, an improved location method based on flood mechanism quasi-synchronization was proposed. By setting the master-slave base station, the clock synchronization between the base station and the tag is realized by using the flooding mechanism to transfer the quasi-synchronous message step by step, which meets the requirement of the TOA algorithm in the DS-TWR method for the clock error in the communication, thus improving the ranging accuracy. At the same time, the unique time slot is allocated to the tag base station pair through the multi-hash operation, which effectively improves the communication success rate under the condition of multi-tags. The experimental results show that the average communication success rate of the improved system is increased by 16%, the energy consumption of the tag is reduced by 30%, and the amount of data acquired per unit time is increased by 27.8% under the condition of multi-tag. The system can improve the communication efficiency and reduce the energy consumption, which has a high engineering application value.