| With the concepts of network calculus presented, it attracted a large number of scholars to study, so to enable it to continue to develop and enrich two theoretical systems: deterministic and stochastic network calculus. Ethernet technology has many advantages, such as low cost, such as stability and shared resource. With Ethernet technology as the representative of communications technologies developing rapidly, it soon monopolies the network of office areas, and also applies to industrial control and aerospace and other fields. Meanwhile, the need for Ethernet technology constantly updated, not only for the high rate, but also the real-time and deterministic, thus, deterministic Ethernet comes into being. Deterministic Ethernet is still in the research phase, and network calculation theory is a good tool for the analysis of the performance of the deterministic Ethernet.Network calculus theory and deterministic Ethernet all have much development, but rarely work in deterministic Ethernet using network calculus for analysis. The thesis is to use the tool of network calculus theory to research and analyze deterministic Ethernet. Firstly, we establish basic simulation communication model of data models(time-triggered, date-constrained, best-effort), process models, node models. We use the basic models to establish simple and complex network topologies, and we propose simple star topology, cascade and dual channel cascade topologies. Cascade topology is the extension of the star topology, and the dual channel cascade topology is to resolve the problem of fault tolerance. Secondly, we establish the network calculus model of three network topologies. Based on the simple star topology, we take into account a variety of factors(such as flows of different data) to analyze the complex topologies, we also use deconvolution theory to build mathematical models to obtain the theoretical results of the three topologies. Lastly, from the three aspects of end-to-end latency, throughput and packet loss rates, we will compare theoretical results and simulation results to research and analyze to obtain deterministic Ethernet performance conclusions.In the thesis, we analyze the three different topologies from simple to complex. Time-triggered data are real-time guaranteed and have no packet loss. Rate-constrained data’s priority is smaller, and its end-to-end delay is under the theoretical calculations. Generally, it has no packet loss. Unless the amount of data is large, it will have small amount of packet loss. Best-effort data is the traditional data, which is compatible by the deterministic Ethernet. It can’t be guaranteed and has the very large value of end-to-end delay when waiting in the queue. After that the normal service will be resumed. Based on the certainty and real-service, dual channel cascade topology play good fault tolerance capability. In General, the deterministic Ethernet has a good performance, facilitating it to apply in areas such as aerospace and industrial control for promotion. |
