一种窄带非对称信道的RTU高效数据传输控制方法

针对传统短波、超短波等窄带无线通信上下行信道不对称特点,提出一种水文水资源远程测控终端系统(RTU)高效数据可靠传输控制方法,综合采用“定值存储发送”、“定时存储发送”、“数据自动补传”、“发送完延时等待”等技术,根据实际网络情况,调整数据包尺寸、发送间隔和重发次数,控制发送速率.运用该方法,可在突发报文增多的情况下控制RTU成功发送数据的关键因素,增强了RTU通信协议的控制能力,为适应物联网应用提供解决方案.

Approach to high performance data transmission control of RTU on narrowband asymmetric channel

Focusing on the asymmetric feature of uplink and downlink channel in traditional narrowband wireless communication such as short wave and ultra-short wave,this paper proposes a control method of reliable high performance data transmission for RTU in hydrology.It applies technologies including data relay with size reshape,data relay with interval reshape,auto data retransmission,send-out-then-wait and so on.According to actual network status,it can adjust the size of package,transmission time interval,and number of re-transmission,as well as control the transmission rate.By using the proposed method,it is possible to control the key factors of successful data transmission of RTU under the situation of sudden message increase.Therefore,it can strengthen the control ability of RTU communication protocol,and provide solution to adapt IOT applications.