基于混合纠错技术的北斗长报文可靠传输机制设计

北斗卫星导航系统的短报文通信功能在传输容量上具有一定的限制，并且无回执信息，属于不可靠的通信方式。为了提高长数据报文的传输可靠性，通过对传输协议的改进，提出了一套基于混合纠错技术的长报文可靠传输机制。通过前向纠错技术和自动重传请求技术的结合，能够对一定范围内的出错情况进行自纠正，并对超出自纠能力的传输出错进行反馈重传，从而提高传输的可靠性。

Design of reliable transmission mechanism for Beidou long message based on hybrid error correction technology

The short message communication function of Beidou Satellite Navigation System has some limitations in transmission capacity, and there is no receipt information, which is an unreliable communication mode. In order to improve the transmission reliability of long data message, a set of reliable transmission mechanism of long message based on hybrid error correction technology is proposed by improving the transmission protocol. Through the combination of forward error correction and automatic retransmission request technology, it can correct the error in a certain range, and retransmit the transmission error beyond the self correction ability, thus improving the reliability of the transmission.