摘要
针对现有北斗短报文传输成功率偏低、通信链路不可靠等问题,提出一种“反馈重发—消息缓存”传输控制机制ARQ-MC(AutomaticRequestforRepetition—Message Cache)。该机制在北斗终端中建立可靠的报文反馈链路,监听报文的传输状态,当发生丢包时重发报文。若反馈链路中有新的报文发送,请求中止重发执行消息缓存,实现对发送失败报文的缓存,并等待空闲进程重发缓存区中的报文。基于JZ6001北斗终端实现了ARQ-MC传输控制机制,实验结果表明,该机制可将报文传输成功率提高至99.65%,大大提高了北斗短报文气象水文数据传输效率。
Aiming at the problems of low transmission success rate and unreliable communication link of Beidou short message,an Automatic Request for Repetition-Message Cache(ARQ-MC)transmission control mechanism is proposed.The mechanism establishes a reliable message feedback link in the Beidou terminal,monitors the transmission status of the message,and sends the message again when packet loss occurs.If there is a new message sent in the feedback link,it requests to abort the retransmission execution message cache,implements the cache for the failed message,and waits for the idle process to resend the message in the cache.Based on the Beidou terminal of JZ6001,the ARQ-MC transmission control mechanism is realized in this paper.The experimental results show that this mechanism can improve the success rate of message transmission to 99.65%,and greatly improve the efficiency of meteorological and hydrological data transmission of Beidou short message.
作者
夏凯文
冯径
王倩茹
XIA Kai-wen;FENG Jing;WANG Qian-ru(College of Meteorology and Oceanography,National University of Defense Technology,Nanjing 211101 China;No.31010 Troops of PLA,Beijing 100080 China)
出处
《自动化技术与应用》
2021年第7期57-61,共5页
Techniques of Automation and Applications
关键词
气象水文数据
北斗短报文
数据传输
反馈重发
消息缓存
meteorological and hydrological data
beidou short message
data transmission
automatic request for repetition
