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.%Data loss and out-of-order data mishandling problems were found from an Inmarsat communication system for a scientific survey ship during realtime data transmission.Following analysis of the composition of the Inmarsat communication system,data transmission protocol and type,time-delay and jitter during data transmission,the function and flowchart of time delay smoothing system,defects are found in design of the delay smoothing system.To solve the problems,new design methods are proposed to use equinoctial realtime data monitoring,data serial number judgment,data serial number rearrangement,key data resending of time delay smoothing system for improvement of system flowchart.The feasibility of the proposed methods is validated by construction of a simulation environment and rehearsal with the environment.In subsequent application of the proposed methods in an engineering project,no data loss and out-of-order problems are encountered.
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