Time-sensitive network traffic shaping method

Abstract

The invention relates to a time-sensitive network traffic shaping method, which belongs to the field of time-sensitive networks, and comprises the following steps: S1, additionally adding a BE queue on the basis of a CQF mechanism; s2, distinguishing the time-sensitive traffic and the BE traffic at the enqueue port by taking whether the traffic is the time-sensitive traffic or not as a standard; s3, inserting the BE flow into the remaining time slot part of the odd-even queue at an output port for transmission; and S4, finally, performing optimization solution through the idea of a heuristic algorithm for simulating annealing by conditional constraints to obtain a corresponding scheduling strategy, and finishing shaping and scheduling of the mixed time-sensitive traffic and the BE traffic. According to the method, the bandwidth utilization rate of the time-sensitive network can be obviously improved, and the worst end-to-end delay is reduced.

Description

technical field [0001] The invention belongs to the field of time-sensitive networks, and relates to a time-sensitive network traffic shaping method. Background technique [0002] Time-Sensitive Networking (TSN) is a sub-task group in the IEEE 802.1 working group, and the technology was established in 2012. The predecessor of TSN is the AVB (Audio Video Bridging, audio and video bridging) working group established in 2005, which mainly solves the problem of real-time transmission of audio and video. Time Sensitive Networking (TSN) is evolving with Industry 4.0 to enable deterministic Ethernet communication in IEEE 802 networks. TSN is widely used in audio video bridging (AVB), automotive, aerospace, industrial automation, etc. TSN enhances functions such as time synchronization, deterministic flow scheduling, and reliable redundancy to ensure the performance of key flows while transmitting common flows through the common network. [0003] The TSN traffic shaping mechanism...

AI Technical Summary

Problems solved by technology

[0004] The CQF mechanism has the following problems: 1. Most of the traffic scheduling problems faced by the CQF mechanism are delay-sensitive traffic, but there are also BE traffic that needs to be transmitted during the production process of the smart factory. Traffic scheduling can also complete traffic scheduling, but it will increase the average delay of time-sensitive traffic, so how to mix delay-sensitive traffic and BE traffic is a problem to be solved

2. The bandwidth utilization rate of the CQF mechanism is low: ① Periodic circulation traffic gathers a large number of queues at one end. Due to the particularity of periodic forwarding, many periodic circulation traffics are easy to converge at one end of the queue, causing the other part of the queue to be idle. not tall

②Due to the particularity of CQF scheduling, the entire time needs to be divided into fixed time slots. In order to meet the transmission security of periodic traffic, this fixed time slot will choose a time slot length greater than the maximum message, which will lead to Low bandwidth utilization when transmitting small packets

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