Divided type scheduling method applied to shared Ethernet

A scheduling method, Ethernet technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve the problems of research scope and technological advancement not as extensive and continuous as Ethernet technology, poor transmission bandwidth scalability, etc. Achieve significant market prospects and economic benefits, improve transmission certainty and reliability, and achieve a wide range of effects

Active Publication Date: 2018-08-24
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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Problems solved by technology

As a relatively closed bus technology, TTP's research scope and technical advancement are not as extensive and continuous as Ethernet technology, and its physical layer technology has almost no new update iterations, resulting in poor scalability of transmission bandwidth; The backbone network based on 802.3 standard, such as industrial switched Ethernet AFDX, time-triggered Ethernet TTE and optical fiber Ethernet, is widely used in avionics systems. Design a high-deterministic, low-cost, and bandwidth-compatible Ethernet-compatible It is very potential to replace TTP with network and apply to aviation distributed control system

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  • Divided type scheduling method applied to shared Ethernet

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, the shared Ethernet is composed of the Ethernet bus transmission medium and the nodes connected to the Ethernet. In the shared Ethernet, the system communication cycle is divided into periodic equal-length time slots according to the number of nodes connected to the Ethernet, and the duration of each system communication cycle is determined according to the system communication requirements on the basis of satisfying the equal-length division. At the same time, the divided time slots are evenly allocated to each node according to the polling mechanism, and each time slot is allocated to a unique node, and the allocated time slots are loaded to each access node in the form of network configuration information. Each node monopolizes the bandwidth of the time slot according to the allocated time slot. Under the...

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Abstract

The invention discloses a divided type scheduling method applied to a shared Ethernet. The divided type scheduling method comprises the following steps: 1, obtaining a distributed time slot; 2, further dividing the time slot into a TT time slice and an ET time slice; 3, sending to a timely scheduling port, a timed scheduling port or a random access port according to a priority of to-be-sent data;4, enabling the timely scheduling port, the timed scheduling port or the random access port to frame received data and store to respective and corresponding timely scheduling data frame queue, timed scheduling data frame queue and random access data frame queue; 5, within the TT time slice, sending data frames in the timely scheduling data frame queue; and 6, within the ET time slice, sending dataframes in the timed scheduling data frame queue and the random access data frame queue. The divided type scheduling method is applied to the field of aviation electronic communication and particularly to a scene with an extremely high demand on certainty and security of data transmission in the fields of flight control, engine control and electromechanical control.

Description

technical field [0001] The invention belongs to the field of airborne bus communication technology in avionics systems, and in particular relates to the selection of bus network architecture in the field of communication, which requires extremely high certainty and safety of data transmission in the field of flight control, engine control and electromechanical control design method. Background technique [0002] In the past few decades, Ethernet, as an open and standardized network, has achieved the most extensive and successful application in the world, and it has experienced the evolution of network configuration from shared to switched. The current mainstream switched Ethernet has developed from 100Mbps to 100Gbps. Due to its open nature, it is vulnerable to various attacks, and the security level cannot meet the high-security application fields of aviation and airborne; at the same time, the best-effort transmission method adopted by Ethernet does not take too much into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/873H04L12/865H04L12/403H04L47/52H04L47/6275
CPCH04L12/4035H04L47/521H04L47/6275
Inventor 罗泽雄崔亮谭永亮于乐蔡冬生徐晓飞
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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