# A Heterogeneous Battlefield Situation Information Sharing Method Based on Content
## 6 Experiment Results and Analysis  
Based on above analysis and research, we took two combat information systems **A** and **B** as the specific research object to build the demonstration scene of heterogeneous information sharing, which is as shown in Figure 12, where the messages transmitted within **A** and **B** were in different formats; message simulator were used to generate formatted messages according to predefined message content or randomly; the sharing platform was used to realize information sharing between **A** and **B** based on the information sharing framework proposed in this paper; terminals were used to simulate the combat units working in **A** or **B**. When conducting the experiment, we took tanks as description targets and predefined the description information of 12 targets, which is shown in Figure 13c. The attribute concept-logic tree and the main entity relationships concerned are shown in Figure 13a,b respectively. In the process of the experiment, the complete information about Targets 1-4 and part of the information about 5-8 were transmitted within **A**, while the complete information about Targets 9-12 and part of the information about 5-8 were transmitted within **B**, where the complete information about Targets 5-8 could be covered by the combination of the information transmitted within **A** and **B**. The experimental content and result are as follows. Figure 11: The relation of \(k\), \(l\), and \(d\) when TRto = 1. (1) Generate formatted messages according to the predefined description information of targets, where because the length of a single formatted message is limited, a piece of message usually contains a portion of the information about a target. Based on the information sharing platform, different terminals obtained different target information as required, and the information requirements are shown in Table 4.  
When the system was stable, we compared the information obtained by different terminals with the predefined description information of targets, where a matching degree between obtained information and predefined information, which is denoted as \(Mde_{u}\), was used to measure the validity and correctness of information acquisition. The value of \(Mde_{u}\) can be calculated according to Equation (8), where \(N_{j}\) represents the total number of items describing the information about target \(j\), \(OI(Item_{i})\) represents the value of the \(i\)th item in the obtained information about target \(j\), \(PI(Item_{i})\) represents the value of the \(i\)th item in the predefined information about target \(j\), and \(M\) represents the number of targets in the information requirement of a terminal. If \(OI(Item_{i})\) matches \(PI(Item_{i})\), then the value of \(OI(Item_{i})/PI(Item_{i})\) is one, otherwise the value of \(OI(Item_{i})/PI(Item_{i})\) is zero. \[\left\{ \begin{array}{c}Mde_{j}=\sum\limits_{i}^{N_{j}}\frac{OI(Item_{i})/PI( Item_{i})}{N_{j}}\\ Mde_{u}=\sum\limits_{j}^{M}Mde_{j}/M\end{array} \right. \tag{8}\]  
(2) On the basis of Step 1, modify some of the predefined information about some targets randomly, while other conditions and experimental steps remain unchanged. Calculate the information matching degree of each terminal. (3) Repeat Step 2 several times, while calculating the information matching degree of each terminal. \begin{table}
\begin{tabular}{c l} \hline \hline
**Terminal** & **Information Requirement** \\ \hline
1 & Information about Targets 1, 2, 5, and 6. \\
2 & Information about Targets 3, 4, 7, and 8. \\
3 & Information about Targets 1, 6, 9, and 12. \\
4 & Information about Targets 2, 7, 10, and 11. \\
5 & Information about targets commanded by Target 2. \\
6 & Information about targets cooperated with Target 9. \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Information requirements of different terminals. Figure 12: Demonstration scene of heterogeneous information sharing.