Communication scheduling method based on time

A communication scheduling and time technology, applied in the field of communication, can solve the problems of communication delay, large jitter, and inability to meet the application requirements of safety-critical fields, and achieve the effect of strong real-time performance.

Active Publication Date: 2014-03-26
AVIC NO 631 RES INST
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Problems solved by technology

Due to the randomness of the ordinary Ethernet communication of the event trigger mechanism, the communication delay and jitter are large, which cannot meet the application requirements of safety-critical fields.

Method used

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  • Communication scheduling method based on time
  • Communication scheduling method based on time

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Embodiment Construction

[0029] A time-based communication scheduling method, the overall structure adopted is as figure 1 Shown. It includes 4 parts: communication configuration, sending buffer, scheduler and redundancy control.

[0030] The sending communication configuration unit is used to save the configuration parameters of each sending virtual link (VL), the sending buffer is used to save the data frame to be sent, the scheduler performs 128 VL communication scheduling functions, and the redundancy control is used for double redundancy Transmission control of the degree network.

[0031] The scheduling method of the present invention includes the following steps:

[0032] 1] Configuration parameters

[0033] Configure parameters for each sending virtual link. The parameters include control parameters and time parameters. The control parameters include parameters indicating whether the sending virtual link is valid, the maximum frame length of the sending virtual link, the selection of the sending marg...

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Abstract

The invention relates to a communication scheduling method based on time. The communication scheduling method comprises the steps that 1) parameters comprising control parameters and time parameters are allocated for each transmission virtual link; 2) all the transmission virtual links are arranged in turn according to the respective time parameter; 3) a transmission buffer zone of the virtual links buffers a transmission frame; 4) a scheduler in a group period separately visits each virtual link according to the time parameter of the transmission virtual link and transmits the frame data kept in the transmission buffer zone according to the time parameter allocated by each virtual link. The invention provides a scheduling mechanism triggered by time, and the mechanism supports the communication triggered by time. Therefore, compared with the communication of common Ethernet network with a mechanism triggered by an event, the mechanism has the advantage of strong real-time.

Description

Technical field [0001] The invention belongs to the field of communication technology. Background technique [0002] The existing airborne bus and network technologies have technical defects in terms of transmission bandwidth, determinism, and real-time characteristics, and cannot meet the communication requirements of safety-critical fields such as flight control systems. Therefore, the aircraft currently has the integration of multiple airborne communication network technologies: 1553B bus, ARINC429, FC network, CAN bus, AFDX network and other network technologies are concentrated in the same combat aircraft, for the upgrade, debugging, and debugging of combat aircraft. Many difficulties have been added to maintenance such as replacement. [0003] Therefore, it is necessary to propose a method to solve the transmission time trigger communication on the ordinary Ethernet to meet the application requirements of safety-critical fields. [0004] In high-security communication, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/861
Inventor 黄韬王红春陈长胜何向栋李大鹏田园刘智武张旭张立辉邱征
Owner AVIC NO 631 RES INST
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