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A time-triggered tt frame message transmission method

A transmission method and time-triggered technology, which is applied in the field of message transmission, can solve problems such as insufficient internal cache and external cache delay jitter, and achieve the effects of avoiding delay and jitter, reducing cache capacity requirements, and lightening the burden

Active Publication Date: 2022-05-24
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a time-triggered TT frame message transmission method to solve the problem of insufficient internal buffer of existing devices or use of external buffer to cause time delay and jitter when transmitting multiple virtual link specifications

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  • A time-triggered tt frame message transmission method

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Embodiment Construction

[0013] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] A TT frame is a periodic message, and its corresponding TT cycle value is innumerable, but whether it is a receiving time point or a sending time point, it is a fixed and repeated time value relative to the zero point of the cycle. The TT cycle values ​​are scheduled and arranged as staggered periodic time points on the TT cycle time axis, and are periodically repeated on an infinite time axis, endlessly. In one TT cycle, many TT frames with different virtual link IDs (VLIDs) can be scheduled.

[0015] Based on the above-mentioned time-triggered feature of TT packets, this embodiment provides a time-triggered TT frame packet transmission method. According to the TT period, virtual links (VLs) corresponding to TT frames of the sam...

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Abstract

The invention relates to a time-triggered TT frame message transmission method, comprising: classifying the TT frames to be sent to the corresponding virtual links according to the TT period to obtain several classification results; all virtual links under each classification result The link corresponds to a parallel channel; each parallel channel has a corresponding cache, and the TT frames of each virtual link are stored in and out of the cache in turn: store the TT frames received in the corresponding virtual link into the cache, and wait until a When the sending time of the TT frame of the virtual link arrives, the TT frame of the virtual link path is removed from the buffer, and the TT frame of the next virtual link is prepared to be transmitted; the TT frame is removed from the buffer and sent to the corresponding physical interface, and the physical interface Send the received TT frame to the corresponding peer device. The invention reduces the burden of the cache, reduces the requirement of the cache capacity, and simultaneously avoids the problems of time delay and jitter caused by using an external cache.

Description

technical field [0001] The invention relates to a time-triggered TT frame message transmission method, which belongs to the technical field of message transmission. Background technique [0002] Periodic time-triggered messages are deterministic and high real-time during bus transmission, and can ensure message transmission within a specified time. Among them, the TTE network (Time Trigger Ethernet, time-triggered network) transmits periodic time-triggered packets. The TTE network is based on the TTA (Time-Triggered architecture, time-triggered architecture), using a standard IEEE802.3 A time-triggered network protocol implemented over Ethernet. The core of TTE network is to define how to achieve high-precision time synchronization in standard Ethernet, which can be compatible with common network data streams, AFDX (Avionics Full Duplex Switched Ethernet, Avionics Full Duplex Switched Ethernet, Avionics Full Duplex Switched Ethernet) on the same network platform network) d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/12H04W72/04H04L67/568G06F9/455
Inventor 陈水忠刘抒珍孙文中
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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