Military tactical networks (MTNs) have grown in size and complexity as the volume of battlefield communications business has increased dramatically. There is a critical need for a quantitative evaluation method to assess the performance of MTNs. Based on the transmission characters of battlefield communication business and the availability of communication equipment, this paper proposed a Markov chain-based network steady-state availability model. Using this model and the analysis of the CSMA/CA transmission protocol as preconditions, a delay-based quantitative evaluation model of network business availability is proposed based on statistical principles. The relationship between network business availability and crucial metrics such as node size and node failure/repair ratio is investigated in simulation experiments to ensure the validity and correctness of the proposed model. The work done in this paper contributes to effectively evaluating the overall availability of MTNs in a complex environment.

随着战场通信业务量的急剧增加，军事战术网络 (MTN) 的规模和复杂性都在增长。迫切需要一种定量评估方法来评估 MTN 的绩效。基于战场通信业务的传输特性和通信设备的可用性，提出了一种基于马尔可夫链的网络稳态可用性模型。以该模型和对CSMA/CA传输协议的分析为前提，基于统计原理，提出一种基于时延的网络业务可用性定量评估模型。在仿真实验中研究了网络业务可用性与节点大小和节点故障/修复率等关键指标之间的关系，以确保所提出模型的有效性和正确性。本文所做的工作有助于有效评估复杂环境中 MTN 的整体可用性。