Incremental scene-oriented delay analysis method for AVB traffic of TSN network

By constructing a fast arrival curve for TT traffic and an arrival and service curve model for AVB traffic, the problem of high computational complexity in traditional TSN network computation in incremental scenarios is solved, and low-complexity fast AVB flow latency analysis and bottleneck port location are realized.

CN122372470APending Publication Date: 2026-07-10BEIHANG UNIV
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Patent Information

Application Number
CN202610546325.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-23
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In incremental scenarios, traditional TSN network calculation and analysis methods rely on global network information, have high computational complexity, are difficult to respond quickly to dynamic traffic changes, and cannot meet the flexible traffic addition or deletion requirements of airborne networks.

Method used

This paper proposes a delay analysis method for AVB traffic in TSN networks for incremental scenarios. By constructing the fast arrival curve of TT traffic and the arrival and service curve model of AVB flow, the method calculates the end-to-end worst-case delay time of AVB flow by using only the number of time slots and the maximum time slot length of TT traffic, combined with the characteristics of ATS and CBS shapers, thus avoiding dependence on global traffic information.

Benefits of technology

It reduces computational complexity and significantly reduces computation time. It can eliminate the need to recalculate AVB stream latency when TT traffic changes, and it is easy to locate bottleneck ports, supporting rapid analysis in incremental scenarios.

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Abstract

The invention discloses an AVB (Audio Video Broadcasting) traffic delay analysis method of a TSN (Transport Sensor Network) for an incremental scene, which takes network calculation as a theoretical basis and overcomes the defect of a traditional analysis method depending on a global GCL (Graphics Control Language) scheduling table. The method comprises the following steps: firstly, depicting an inhibition effect of TT flow on AVB flow transmission, and constructing a rapid TT arrival curve only by utilizing the maximum time slot number and the maximum time slot length of the TT flow under the condition of not analyzing a full-quantity scheduling table; secondly, constructing an arrival curve and service curve model of the AVB stream at an output port by combining a hop-by-hop reshaping characteristic of an ATS reshaper and a credit constraint mechanism of a CBS reshaper; and finally, the worst delay time of the port is obtained through the maximum horizontal distance between the arrival curve and the service curve of the AVB stream, and end-to-end worst delay time is obtained through hop-by-hop accumulation along the transmission path of the AVB stream. Compared with the traditional network calculation method, the incremental delay analysis method provided by the invention does not depend on the global flow information of the TSN network, and the calculation complexity can be reduced.
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