This paper takes a typical real-time application as the background, analyzes its QoS requirements from the aspects of time, reliability, security, etc., and defines multi-dimensional QoS parameters. On the basis of the existing QoS structure, a QoS hierarchical model of real-time system is established. Keywords: real-time system QoS fire command system With the rapid development of network technology and information technology and the increasing popularity and deepening of computer applications, the concept and technology of quality of service QoS (Quality of Service) has achieved important research results in the field of communication networks, making the network environment adapt to the high-quality service requirements of various applications. From the perspective of service-based system design, distributed real-time computing platforms also have service quality problems. For example, for distributed real-time applications, non-functional requirements such as time, reliability, and security are very important. They can be regarded as application service quality (QoS) requirements proposed by real-time applications. In other words, QoS-based resource management technology can also be applied to real-time and distributed computing systems, and the service provider is the operating system itself. Therefore, it is necessary to analyze and study QoS-based multi-dimensional resource management technology from the perspective of application. For military distributed real-time applications, there are real-time, reliable, and secure QoS requirements. In addition, specific applications may also have special QoS requirements, which forms multi-dimensional QoS. To this end, it is necessary to deeply analyze and scientifically define a multi-dimensional QoS parameter set. On this basis, it is possible to design and develop user-defined QoS tools and application description QoS interfaces.
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