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A Message Interval Sensitive 1553b Bus Event Message Scheduling Method

A technology of event message and scheduling method, which is applied in bus network, electrical components, digital transmission system, etc., can solve the problems of increasing the repetition interval of event message transmission interval, unable to maintain the bus scheduling period, etc., so as to improve the message interval and delay. performance, reduce processor resource usage, and achieve simple and effective results

Active Publication Date: 2021-01-01
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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AI Technical Summary

Problems solved by technology

When the bus load increases, the cycle of bus scheduling cannot be maintained, and the event message transmission interval is significantly larger than the event repetition interval

Method used

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  • A Message Interval Sensitive 1553b Bus Event Message Scheduling Method
  • A Message Interval Sensitive 1553b Bus Event Message Scheduling Method
  • A Message Interval Sensitive 1553b Bus Event Message Scheduling Method

Examples

Experimental program
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Effect test

Embodiment

[0048] Step 1. Select the maximum low-load scheduling period value that satisfies the jitter limit of the repeated event interval and the event message transmission interval;

[0049] Define the interval of repeating events as T EVENT , the cycle of bus scheduling is T SCH ,T EVENT is T SCH Integer multiples of . In the case of low bus load, the bus controller every T SCH Organize a bus message, and the bus message organization and transmission time in each cycle shall not exceed T SCH ,Such as figure 1 as shown, figure 1 The middle shaded part represents the message sequence transmission.

[0050] The event message is triggered at time 0, and the bus controller organizes the event message at time t and transmits it later, and the transmission end time does not exceed T SCH ,. event message at T EVENT time trigger, will be at T EVENT +t time is organized by the bus controller and subsequent transmission is carried out, and the transmission end time does not exceed T...

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Abstract

The invention provides a message interval-sensitive 1553B bus event message scheduling method. A maximum low-load scheduling period value which meets the jitter limit of a repeated event interval andan event message transmission interval is selected; when bus transmission enters an accidental high-load state, a message balanced transmission method is adopted; and when the number of continuous scheduling periods of less than TSCH reaches a threshold, the bus transmission is judged to enter a low-load state. The method is simple, convenient and effective; the bus scheduling method is dynamically adjusted according to load conditions of a bus; the occupation of processor resources is reduced under the condition of low load; and the message interval and the delay performance are improved through message balanced transmission under the condition of high load.

Description

technical field [0001] The invention relates to the field of bus control, in particular to a bus event message scheduling method. Background technique [0002] The 1553B bus is a digital time-division command / response data bus. The communication nodes on the bus are divided into bus controller (BC) and remote terminal (RT). The data flow on the bus is transmitted in units of messages under the scheduling of the bus controller. Event-triggered messages are a typical data flow in 1553B application scenarios. In some scenarios, repetitive events will cause event messages to be periodically transmitted on the bus at repeated intervals. At this time, the system usually limits the jitter range of the message interval and the proportion of messages exceeding the standard. [0003] The existing bus scheduling method selects a fixed bus scheduling cycle according to the allowable range of message interval jitter, and performs bus scheduling according to this cycle. This approach is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/40
CPCH04L12/4015
Inventor 王复苏马丽惟
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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