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Method for sending and reorganizing data frames in ttp format at tte terminal

A technology for terminal transmission and data frame, which is applied in data exchange network, digital transmission system, electrical components and other directions, and can solve the problems of large delay of data transmission across network communication, low operation efficiency and network transmission efficiency, and low data transmission efficiency. , to achieve high bandwidth utilization, high real-time performance, significant market prospects and economic benefits, and a wide range of applications

Active Publication Date: 2019-05-24
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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Problems solved by technology

The branch network using ARINC 429 in the traditional network architecture only has a bandwidth of 1Mbps, resulting in low data transmission efficiency after protocol conversion; at the same time, the frame length of the bus transmission is 4 bytes, except for the frame identification and check digit information, each The amount of effective information carried by the frame is very limited, resulting in a large delay in data transmission across the network, resulting in poor communication certainty and real-time performance; this protocol conversion method leads to low software integration, low operating efficiency and network transmission efficiency

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  • Method for sending and reorganizing data frames in ttp format at tte terminal
  • Method for sending and reorganizing data frames in ttp format at tte terminal
  • Method for sending and reorganizing data frames in ttp format at tte terminal

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] In the present invention, the avionics system mainly uses the gigabit bandwidth TTE bus as the aviation airborne backbone network, and the 25 megabit bandwidth TTP bus as the aviation airborne branch line network. The conversion method between the TTE bus and the TTP bus is as follows: figure 1 , figure 2 As shown, the core of the conversion method is the splitting / assembly technology based on TTE / TTP information flow. This technology now splits the data information of the TTE network into data pieces that meet the TTP bus transmission through the splitting algorithm in this design. Through the assembly algorithm in this design, the data information of the TTP network is now assembled into a complete data that meets the TTE bus transmission, and the two-way protocol conversion function between TTE and TTP is realized.

[0027] For the...

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Abstract

The invention discloses a method for sending a data frame in TTP format at a TTE terminal, comprising the following steps: step 1), splitting and judging the TTE message flow to be sent, if the length of the TTE message flow is greater than the maximum message load configured by TTP , then execute step 2; otherwise, directly pack the TTE message flow into a TTP unfragmented frame format and transmit it through the TTP bus: step 2) read the application messages sequentially from the TTE message flow according to the maximum message load of the TTP fragmented frame for TTP segmentation Slice frames are packed and transmitted over the TTP bus. The invention realizes the network communication docking function between the gigabit bandwidth TTE bus as the aviation airborne backbone network and the 25 megabit bandwidth TTP bus as the aviation airborne branch line network, and has real significance for realizing the time-triggered architecture of the avionics system on a unified network.

Description

technical field [0001] The invention belongs to the technical field of airborne bus communication in an avionics system, in particular to a design method for high-efficiency conversion of Ethernet and time-triggered protocols under a time-triggered communication framework. Background technique [0002] With the increasing demand of avionics systems for distributed communication applications with different safety criticality and real-time characteristics, the traditional network using event-based communication mechanism cannot control the delay and jitter caused by transmission competition, and cannot meet the needs of different communication systems. Application of time safety critical requirements. The time-triggered communication mechanism based on clock synchronization provides an opportunity to improve the determinism and real-time performance of the airborne bus. Both time-triggered Ethernet (TTE) and time-triggered protocol bus (TTP) belong to the aviation airborne bus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/951H04L12/953H04L29/06H04L47/43
CPCH04L49/9057H04L69/08
Inventor 罗泽雄
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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