摘要： 为构建稳健的远程数据传输系统,设计并实现一种基于北斗短报文协议的可靠远程通信系统。针对北斗短报文通信不可靠和通信容量有限的局限性,采用丢包反馈重传机制完善数据传输的可靠性,运用粘包机制提高小数据传输效率,根据分包机制实现大数据的正确传输。将北斗短报文通信协议的电文内容进行扩充,自定义系统通信协议,设计开发一款嵌入式通信接口机,并给出相应的管理机制。通过将北斗通信接口机作为数据传输中介进行实验,结果表明,丢包反馈重传机制比无反馈机制的丢包率平均降低46.877%,能保证北斗远程数据传输的可靠性。

关键词: 北斗短报文通信, 丢包反馈重传机制, 粘包机制, 分包机制, 系统通信协议

Abstract: To construct moderate remote data transmission systems,reliable remote transmission system based on BeiDou short-message protocol is designed and implemented. It adopts packet loss feedback and retransmission mechanism to increase reliability of data transmission and proposes packet assembly and fragmentation mechanism to improve data transmission efficiency and guarantee the correct data transmission.Meanwhile,the system communication protocol is customized by expanding message content of BeiDou short-message communication protocol. Moreover,an embedded Beidou Communication Device (BCD) is developed and a corresponding management mechanism is provided,realizing robust transmission of remote data. It uses BCDs as intermediary of data transmission for experiment. Result shows that the packet loss rate is decreased by 46.877%on average with packet loss feedback and retransmission mechanism than no feedback,which ensures the reliability of BeiDou remote data transmission.

Key words: BeiDou short-message communication, packet loss feedback and retransmission mechanism, assembly mechanism, fragmentation mechanism, system communication protocol

中图分类号: 

• TP391