﻿ 船舶交通数据实时传输可靠性评估系统
 舰船科学技术  2024, Vol. 46 Issue (11): 165-168    DOI: 10.3404/j.issn.1672-7649.2024.11.030 PDF

Reliability evaluation system for real-time transmission of ship traffic data
LING Haisheng
Marine Department, Zhejiang Institute of Communication, Hangzhou 311112, China
Abstract: To ensure the reliability of real-time transmission of ship traffic data, a reliability evaluation system for real-time transmission of ship traffic data is designed. Select evaluation indicators from four main aspects: network conditions, node equipment, environmental factors, and network management, and construct a reliability evaluation index system for real-time transmission of ship traffic data; Using the fuzzy analytic hierarchy process based on triangular fuzzy numbers to calculate the weight values of evaluation indicators; Form and summarize the corresponding weight values of each evaluation indicator to obtain the final real-time transmission reliability evaluation result of ship traffic data. The experimental results show that the system can obtain accurate evaluation results, and the probability of real-time transmission failure of ship traffic data caused by different factors has decreased by more than 50%. This indicates that the evaluation results based on the system can effectively ensure the reliability of real-time transmission of ship traffic data.
Key words: ship traffic data     real time transmission     reliability     evaluation indicator system
0 引　言

1 船舶交通数据实时传输可靠性评估系统设计 1.1 系统技术路线研究

 图 1 系统技术路线 Fig. 1 System technical route
1.2 评估指标体系构建

1.3 基于模糊层次分析法的指标权重计算

 $\left\{ \begin{gathered} M = {\left( {{r_{ij}}} \right)_{4 \times 4}}，\\ {r_{ij}} = \left( {{r_1},{r_m},{r_h}} \right) 。\\ \end{gathered} \right.$ (1)

 $\left\{ \begin{gathered} F\left( {{U_i}} \right) = S\left( {{U_i}} \right) \otimes {\left[ {S\left( U \right)} \right]^{ - 1}} ，\\ S\left( {{U_i}} \right) = {r_{i1}} \oplus {r_{i2}} \oplus {r_{i3}} \oplus {r_{i4}} ，\\ S\left( U \right) = S\left( {{U_1}} \right) \oplus \cdots \oplus S\left( {{U_1}} \right)。\\ \end{gathered} \right.$ (2)

G(Ui)为船舶交通数据实时传输可靠性评估指标Ui的可能度向量，其计算公式如下：

 $\begin{gathered} G\left( {{U_i}} \right) = \left( {W\left( {{F_i} \geqslant {F_1}} \right)} \right),\left( {W\left( {{F_i} \geqslant {F_2}} \right)} \right), \\ \mathop {}\nolimits_{} \mathop {}\nolimits_{} \mathop {}\nolimits_{} \left( {W\left( {{F_i} \geqslant {F_3}} \right)} \right),\left( {W\left( {{F_i} \geqslant {F_4}} \right)} \right)。\\ \end{gathered}$ (3)

 ${\boldsymbol{N}} = {\left[ {G\left( {{U_1}} \right)G\left( {{U_2}} \right)G\left( {{U_3}} \right)G\left( {{U_4}} \right)} \right]^{ - 1}} = {\left( \xi \right)_{4 \times 4}} 。$ (4)

 ${w'_1} =\frac{{\displaystyle\sum\limits_{j = 1}^4 \xi + \displaystyle\frac{n}{2} - 1}}{{n\left( {n - 1} \right)}} 。$ (5)

${w'_{}}$实施归一化处理，由此能够得到船舶交通数据实时传输可靠性评估指标的权重向量w

1.4 评估模型构建

 $\left\{ \begin{gathered} U = {w_1} \times {U_1} + {w_2} \times {U_2} + {w_3} \times {U_3} + {w_4} \times {U_4}，\\ {U_m} = \sum {{w_{mh}} \times {U_{mh}}} \left( {m = 1,2,3,4;h = 1,2,3,4} \right)。\\ \end{gathered} \right.$ (6)

2 实验结果

2.1 评估结果

 图 2 研究对象交通数据实时传输可靠性评估结果 Fig. 2 Reliability evaluation results of real-time transmission of traffic data for the research object
2.2 应用效果分析

3 结　语

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