北斗卫星通信在应急自动气象站中的应用

Application of Compass Navigation Satellite Communication in Emergency Automatic Weather Station

为了能够在发生灾难事故时进行紧急通信,应急自动气象站采用了北斗卫星导航定位系统的简短通信技术。在北斗卫星通信方式设计过程中,采取压缩数据包长度、主动传输+失败应答通信模式、对通信终端采取休眠工作等方式,在保证数据传输质量的同时减少不必要的通信次数,降低系统功耗,延长工作时间。研究结果表明,采用本文的通信设计,可以实现:1)将数据包长度压缩60%,满足了北斗卫星短信包的长度要求。2)兼顾解决了数据完整性问题和通信资费问题,在正常工作状态下采用自动定时传输模式节约通信资费;在通信失败的情况下采用主从应答通信模式,通过向自动气象站发出数据补收命令,及时取得丢失的数据。3)有效地降低了系统的功耗,通信终端平均功耗下降了10%。

In order to transfer signals by Compass Navigation Satellite system, Automatic Weather Station used in emergency adopt a brief communication technology. The technology was composed by compressed datasets, active transfer protocol, failure response mode, smart sleep mode and so on, which enable less power consumption with the same data quality. The results are as follows. 1 ） The data length could be reduced 60% , which satisfied the length demand of Compass Navigation Satellite short message datasets. 2）The data reception become more effective by active transfer protocol and failure response mode. 3）The system power consumption could be reduced by 10%.