TTE scheduling communication method based on self-adaptive dual redundancy

A scheduling communication and dual-redundancy technology, which is applied in the field of aerospace communication, can solve problems such as increasing the number of network messages, network delay, and protocol complexity, and achieve the effects of improving bandwidth utilization, improving real-time performance, and reducing communication load

Inactive Publication Date: 2021-03-26
TIANJIN UNIV
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AI Technical Summary

Problems solved by technology

[0004] When a network failure occurs, traditional redundant link switching takes a long time and costs a lot, making it difficult to meet the application requirements in the aerospace field
Based on the PRP protocol, two nodes transmit data on two links at the same

Method used

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  • TTE scheduling communication method based on self-adaptive dual redundancy
  • TTE scheduling communication method based on self-adaptive dual redundancy
  • TTE scheduling communication method based on self-adaptive dual redundancy

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Experimental program
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Embodiment Construction

[0055] 1. Implementation structure

[0056] The realization structure of the present invention is as figure 1 shown.

[0057] It adopts redundant dual Ethernet structure to nodes, and each node is equipped with two completely independent network interfaces, forming two independent Ethernet physical channels of A and B. Messages are sent on both networks A and B at the same time. When a channel fails, the sending node can still send messages in time through the other channel, achieving zero failure recovery time.

[0058] The TTE network adopts a mixed traffic transmission mode, and the transmission traffic is divided into time-triggered (TT) traffic, rate-constrained (RC) traffic, and best-effort (BE) traffic according to time-critical characteristics. kind. TT streams, RC streams, and BE streams follow different scheduling rules and priorities.

[0059] 2. Theoretical Basis

[0060] (1) TTE traffic mixing scheduling principle

[0061] The design of the TTE periodic sche...

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Abstract

The invention belongs to the field of aerospace communication, and aims to improve the utilization rate of available resources of a network, reduce network delay and further ensure the real-time performance of a time-triggered Ethernet. According to the TTE scheduling communication method based on self-adaptive dual redundancy, a dual-Ethernet structure redundant to nodes is adopted, each node isprovided with two completely independent network interfaces for the transmission of mixed flow TT (time-triggered) flow, RC (rate-constrained) flow and BE (best-effort) flow. The TTE scheduling communication method specifically comprises the following steps that the TT flow generates TT flow according to a periodic scheduling principle, a left-end compression principle and a BE scheduling principle; dual-redundancy decentralized transmission is adopted, periodic scheduling table design is carried out on classified messages at a sending end according to a hybrid scheduling principle, and all node channels send the messages according to respective periodic scheduling tables. The method is mainly applied to TTE scheduling communication occasions.

Description

technical field [0001] The invention belongs to the field of aerospace communication and the field of time-triggered Ethernet, in particular to a TTE scheduling communication method based on self-adaptive double redundancy. Background technique [0002] Time-triggered Ethernet (Time-triggered Ethernet, TTE) is a high-speed, real-time, fault-tolerant Ethernet network communication technology that combines high real-time services with traditional best-effort services. value. Time-triggered Ethernet utilizes three infrastructures: synchronization controller SM (synchronization master), synchronization client SC (synchronization client), and compression controller CM (compression master) to ensure time synchronization of the entire network. Reasonable time planning and the design of the time schedule table enable the reasonable transmission of different information flows in the TTE network, reduce delays, and avoid link contention and collision loss of important information in ...

Claims

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Application Information

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IPC IPC(8): H04L12/851H04L12/853H04L12/865H04L12/869H04L12/873H04L29/08H04L47/2416H04L47/52H04L47/6275
CPCH04L47/2416H04L47/2433H04L47/58H04L47/6275H04L47/52H04L67/61
Inventor 汪清张佳滕立平王阔王娴
Owner TIANJIN UNIV
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