集装箱船甲板长直通道无线覆盖仿真

Simulation Study of Wireless Coverage in Corridors on Container Ship Deck

为实现对集装箱船甲板长直通道的无线覆盖预测,提出一种基于射线跟踪法的无线覆盖仿真方法;采用射线跟踪法的反向算法建立射线反射模型,实现点对点传播路径的仿真计算。参照国际电信联盟给出的建议书,对第1菲涅尔损耗点和长直通道的菲涅尔损耗进行计算,对射线反射模型进行有效修正。采用最小二乘法对仿真曲线进行双斜率拟合,得到甲板长直通道的损耗公式。通过试验仿真计算,得到全封闭通道的路径损耗因数分别为1.508和3.030,半封闭通道的路径损耗因数分别为1.512和3.323,符合国际电信联盟建议书的一般性结论,可在集装箱船设计时提供无线覆盖预测,为不同尺度的集装箱船甲板长直通道的基站布设提供设计和优化方面的指导。

A simulation method based on the ray tracing method is devised to predict the wireless coverage in straight long corridors on the deck of a container ship.The reverse calculation deduced from the ray tracing method is used to establish the ray reflection model to simulate the point-to-point propagation.With reference to the recommendations given by the international telecommunication union,the first Fresnel loss point and the Fresnel loss of the straight long corridors are calculated and the ray reflection model is corrected according to the calculation results.The formula to calculate the loss of the straight long corridor on the deck is worked out through fitting two lines of different slops to the simulation data on the least-mean-square-error basis.The path loss factors in fully closed corridors and semi-closed corridors are calculated respectively,1.508 and 3.030 for the former and 1.512 and 3.323 for the latter,which agree with the general conclusion of ITU recommendation.