内河AIS服务性能指标研究与平台设计

针对当前内河AIS服务性能评价指标单一且实船测试过程复杂等问题,从单船、单个基站和航段区域3个角度,提出内河AIS服务性能评价指标。在此基础上,设计了基于长江电子航道图的AIS服务性能分析平台,通过多条件数据查询、数据处理,实现评价指标的计算以及历史AIS数据的显示。以长江岳阳航段为例,开展AIS服务性能分析平台测试。测试结果显示:单船丢包率差异较大(6. 73%,62. 43%]);基站间存在覆盖区域相互重叠的现象,导致单个基站的丢包率约为45%;航段区域整体丢包率和错误率分别为16. 63%和1. 57%。分析结果表明平台可有效实现AIS服务性能分析与数据可视化,从而保障内河AIS数据的可靠性,提高海事管理和服务的水平。

Research on inland AIS service performance index and platform design

In view of the unfavorable evaluation system of inland AIS service and ship complicated testing process,we propose a novel evaluation system from three different angles,i.e.,a single ship,a single base station and a navigation segment,based on which,we design an evaluation platform on the basis of the Yangtze River electronic channel chart to realize calculation of the evaluation indices and display of historical AIS data through multi-condition data query and data processing.Furthermore,a case study of AIS service evaluation is presented for the Yueyang reach,the Yangtze River.The results indicate that the loss rate of a single ship is quite different(\6.73%,62.43%\]);the coverage areas of AIS base stations are overlapped with each other,resulting in that the loss rate of a single base station is about 45%;the overall loss rate and error rates are 16.63% and 1.57% respectively.The analysis results show that the AIS service performance could be effectively evaluated and the results could be visually analyzed.The study provides a useful tool for enhancing the reliability of inland AIS data,so as to ensure the navigation safety of inland ships.