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在实时数据传输过程中,科考船海事卫通链路会出现数据丢包和乱序数据处理不当的问题。通过分析科考船海事卫通链路系统组成,数据传输协议和类型,数据传输时延及抖动,时延平滑系统工作机制和处理流程等,发现时延平滑系统设计上存在缺陷。针对这一缺陷,提出在时延平滑系统中增加数据包分点实时监测、序号判定、序号重排等改进方法,对时延平滑系统的处理流程进行了完善。通过搭建仿真环境并进行模拟演练,验证了改进设计方法的可行性;在某工程应用中,科考船海事卫通链路采用改进后的时延平滑系统,未出现丢包和乱序问题,达到了预期效果。
In the process of real-time data transmission, the problem of data packet loss and out-of-order data processing is experiencing some problems in the course of scientific research ship’s maritime communications. By analyzing the system components, data transmission protocol and type, delay and jitter of data transmission, working mechanism and processing flow of the delay smoothing system, we find that the design of delay smoothing system has some defects. In view of this defect, this paper proposes an improved method of adding real-time monitoring of data packet points, determining serial numbers and rearrangement of serial numbers in time delay smoothing system, and perfecting the processing flow of time delay smoothing system. By setting up a simulation environment and simulating exercises, the feasibility of improving the design method is verified. In an engineering application, an improved time delay smoothing system is adopted for the maritime health communication link of the scientific research ship, and no packet loss and disorder problem occurs. Achieved the desired effect.