Hybrid trigger scheduling method used for airborne fiber channel

A scheduling method, fiber channel technology, applied in the direction of optical fiber transmission, radio transmission system, electrical components, etc., can solve the problem that the deterministic delay cannot be effectively guaranteed, achieve significant economic benefits and application prospects, fast deployment, simple design Effect

Active Publication Date: 2017-03-29
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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Problems solved by technology

[0003] Blindly increasing system bandwidth can no longer solve all problems
Although Fiber Channel has the characteristics of low latency, deterministic latency cannot be effectively guaranteed after data frames are switched and queued.

Method used

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  • Hybrid trigger scheduling method used for airborne fiber channel
  • Hybrid trigger scheduling method used for airborne fiber channel
  • Hybrid trigger scheduling method used for airborne fiber channel

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings.

[0027] For the optical fiber channel network communication system with time-triggered and event-triggered mixed scheduling, the present invention implements data frame transmission scheduling through bandwidth-limiting and time-division multiplexing (TDMA) methods.

[0028] Such as figure 2 As shown, the data frame of the FC communication task can only occur within the active time (active time), and there is a fixed interval between any two active times, and this time interval is called the silence time (silence time). All FC task requests generated during the quiet time will be ignored, and only data frame scheduling requests submitted during the active time will be responded.

[0029] In order to realize time triggering in the FC terminal system, the present invention divides the task period of FC into time trigger segment (abbreviated...

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Abstract

The invention discloses a hybrid trigger scheduling method used for an airborne fiber channel. A time axis is divided into time trigger segments, dynamic segments and default segments, wherein the time trigger segments are used for transmitting data frames triggered based on time; the dynamic segments are used for transmitting data frames triggered not by time; and the default segments are used for synchronizing and correcting a network clock. According to the invention, through division and layering on the time axis, a feasible execution method is brought forward for realizing time trigger and event trigger hybrid scheduling of a fiber channel. The method is simple in design and fast in disposition, is compatible with a conventional fiber channel network system, and has remarkable economic benefits and application prospect.

Description

technical field [0001] The invention relates to an airborne fiber channel (Fiber Channel) network communication system, and proposes a design method for an airborne fiber channel time-triggered scheduling scheme in view of the characteristics of avionics network communication requiring high reliability and certainty. Background technique [0002] Since the development of avionics technology, airborne Fiber Channel (FC) has been widely used in distributed system networks due to its comprehensive advantages in high bandwidth, low latency, and strong anti-electromagnetic interference capabilities. In the avionics system, critical systems such as missions and flight safety require time-deterministic guarantees. figure 1 Shows the fiber channel redundant communication system structure. [0003] Blindly increasing the system bandwidth can no longer solve all problems. Although Fiber Channel has low-latency characteristics, deterministic latency cannot be effectively guaranteed a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/25H04B7/185
CPCH04B7/18519H04B10/25
Inventor 王嘉良
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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