A Time-Sensitive Network Gating Mechanism Traffic Shaping and Routing Planning and Scheduling Method

Abstract

The invention discloses a time-sensitive network gating mechanism traffic shaping and routing planning scheduling method, and relates to the technical field of wired communication networks. According to the real-time demand and priority level, the periodic TC flow is firstly scheduled for routing and transmission, and then the non-TC flow is scheduled for communication and transmission without affecting the deterministic real-time transmission of the TC flow; according to the TC queue GCL design and GCL cycle idle time planning, generate output queue GCL of each switch port, and based on the optimal communication transmission path set of TC flow and non-TC flow, generate the optimal joint scheduling scheme for mixed traffic transmission, and generate switch port and The configuration file of the terminal device is configured on each switch and terminal device. On the premise of guaranteeing the deterministic real-time transmission of multi-period TC streams with different real-time requirements, the present invention improves the communication transmission performance of non-TC streams as much as possible, and avoids the waste of communication resources and the problem of decrease of schedulable solution space.

Description

technical field [0001] The invention relates to the technical field of wired communication networks, in particular to a time-sensitive network gating mechanism traffic shaping and route planning and dispatching method. Background technique [0002] In recent years, in the fields of aerospace, automotive and industrial automation, the demand for deterministic real-time communication of time-critical data streams (TimeCritical, TC) has become higher and higher, and traditional Ethernet technology is difficult to meet the demand due to the "best effort" feature . At present, real-time communication technologies centered on EtherCAT and Profinet have been fully promoted in the market, but these real-time Ethernet technologies have their own dedicated mechanisms, which make them incompatible with each other under working conditions and limit the further development of real-time Ethernet. To this end, the IEEE 802.1 working group hopes to propose a general communication protocol ...

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Problems solved by technology

However, this method simply establishes the mapping relationship between data frames and queues, and does not involve the detailed GCL design of each port. It cannot guarantee the deterministic and real-time transmission of multi-cycle TC streams with different real-time requirements, and is difficult to apply in industrial scenarios. Down

[0006] Most of the existing scheduling methods are based on TTE (Time Trigger Ethernet) technology to allocate TC data streams in corresponding time slots in time and space to ensure the real-time and reliability of TC streams, but this method requires global static scheduling Configuration, cannot flexibly add new end systems or new TC data streams

[0007] Most of the existing scheduling methods based on time-sensitive network gating mechanism only focus on the transmission scheduling of TC data streams, and do not consider the communication transmission performance of RC data and BE data, and also ignore the communication transmission of RC data and BE data. The impact of streaming deterministic transmission is not applicable to industrial sites with multiple data types

[0008] When designing the GCL of each switch port in the existing scheduling method based on time-sensitive network gating mechanism, it is assumed that the opening time of the GCL cycle is consistent, but during the initial transmission period, some switch ports far away from the terminal do not Data arrival, if it is based on global settings, and the GCL cycle is turned on at the same time, it will inevitably lead to a waste of communication resources and a decrease in the schedulable solution space

[0009] Most of the existing scheduling methods give the communication transmission path of each TC data flow in advance, without considering the coupling relationship between path planning and transmission scheduling, which may lead to a decline in the schedulable solution space of the network system or unschedulable situations

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