Time-sensitive network data transmission system and transmission method

A network data transmission, time-sensitive technology, applied in the field of communication, can solve problems such as media access conflicts, and achieve the effect of reducing transmission delay, optimizing determinism and real-time performance, and improving reliability and stability

Active Publication Date: 2020-12-18
ZHEJIANG LAB
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Problems solved by technology

A media access violation still occurs because the port may

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  • Time-sensitive network data transmission system and transmission method
  • Time-sensitive network data transmission system and transmission method
  • Time-sensitive network data transmission system and transmission method

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[0030] The present invention will be described in detail below according to the accompanying drawings and preferred embodiments, and the purpose and effects of the present invention will become clearer.

[0031] like figure 1 As shown in the figure, the present invention discloses a time-sensitive network data transmission system. The system includes an end device, a bridge device and a time synchronization module. The end device is a data sending and receiving point, and the clock synchronization module provides an accurate synchronization clock for the network. The bridge device mainly For the exchange function, it specifically includes the following modules:

[0032] The port traffic monitoring and filtering module is used to control the entry of the port data frame, extract the frame header of the data frame to be forwarded, and perform MAC address filtering, VLAN filtering, flow identification, flow filtering, flow gating and entry. Congestion management;

[0033] The p...

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Abstract

The invention discloses a time-sensitive network data transmission system and transmission method. The system comprises end equipment serving as a data transceiving point, a clock synchronization module for providing an accurate synchronous clock for a network, and bridge equipment playing a switching role, in the bridge equipment, a port flow monitoring and filtering module provides a supervisionmechanism for port data entry management and control, priority queues provide at most eight priority queues, a transmission scheduling module provides a transmission mechanism for time-sensitive datatransmission, and the scheduling module is preempted to optimize time-sensitive data transmission delay. The internal memory unit performs centralized management on the to-be-converted data frames. The system adopts a perfect data shaping scheduling mechanism, so that strong real-time data can preempt weak real-time data, the preempted data can continuously occupy a channel to be transmitted after the strong real-time data is transmitted, a set of rapid transmission solution is provided for future deterministic data, the transmission delay of the data is greatly reduced. The reliability and stability of data transmission are improved.

Description

technical field [0001] The invention relates to the field of communications, in particular to a time-sensitive network data transmission system and a transmission method. Background technique [0002] In the era of intelligent manufacturing, the integration of IT and OT realizes collaborative manufacturing under the entire data transparency. In industrial manufacturing, the communication mode of fieldbus has great limitations, and it is difficult to meet the needs of the era of intelligent manufacturing. The complexity of the field bus has different physical interfaces, transmission mechanisms, and object dictionaries, which cause a large delay and jitter in the collection of IT information and the downlink of instructions; the traditional IEEE802.3 network adopts CSMA / CD, that is, conflict monitoring , the mechanism of preventing collision, resulting in low reliability and stability of important data transmission; industrial motion control systems have higher and higher req...

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Application Information

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IPC IPC(8): H04W56/00H04L7/00H04L12/46
CPCH04L7/00H04L12/4641H04W56/001
Inventor 赵许阳王延松杨汶佼吴少勇张天一
Owner ZHEJIANG LAB
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