Data scheduling and transmitting method supporting time trigger mechanism in FC switch

Abstract

The present invention discloses a data scheduling and transmitting method supporting a time trigger mechanism in a FC switch, including the steps as follows: performing parameter configuration for a port of the switch according to a virtual channel strategy; 2. judging whether a data frame is time trigger data or event trigger data after the port of the switch receives the data frame, and entering a time trigger buffer region if the data frame is the time trigger data; 3. querying the message cycle and the time migration according to a virtual link number after the time trigger data enters the time trigger buffer region, judging whether the data frame is valid or not according to the current global time, and putting the data frame in a port buffer region if the data frame is valid and transmitting a schedule request to a scheduler; 4. responding the schedule request by the scheduler at the given time; 5. and switching on a crossbar switch by the switch after the schedule success so as to complete the data exchange and transmission. The method meets the requirements of high bandwidth and real-time performance for communication transmission in the airplane avionics system.

Description

technical field [0001] The invention relates to the technical field of communication, and proposes a design method for supporting time-triggered data frame scheduling exchange in a fiber channel network switch. technical background [0002] Network systems are the backbone of modern avionics systems. At present, the backbone switching network is designed with the idea of ​​event triggering. The real-time performance cannot meet the needs of data transmission of key subsystems at the same time, which leads to the problem of too many types of buses in the aircraft. The fiber channel network based on event triggering has high comprehensive network complexity. The disadvantage of difficulty is that the faults that occur are often difficult to locate. Contents of the invention [0003] Aiming at the shortcomings that the traditional fiber channel network is driven by event triggering and real-time performance cannot be guaranteed, the present invention provides a data scheduli...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the shortcomings that the traditional fiber channel network is driven by event triggering and real-time performance cannot be guaranteed, the present invention provides a data scheduling transmission method that supports a time-triggered mechanism in a fiber channel network switch, and aims at the characteristics of real-time data transmission. Improvements have been made to increase the virtual channel strategy, thereby providing real-time data transmission capabilities. The relevant improvements meet the requirements of the Fiber Channel series protocol specifications, and realize the communication functions required by the application of avionics systems

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