Avionics any source multicast (ASM) protocol controller

A protocol controller and control register technology, applied in electrical components, electromagnetic wave transmission systems, digital transmission systems, etc., can solve the problem of large transmission delay, difficulty in utilizing the advantages of high-speed transmission of fiber optic channels, and inability to meet the deterministic transmission requirements of avionics system communications and other issues to achieve the effect of high transmission efficiency

Inactive Publication Date: 2010-08-04
AVIC NO 631 RES INST
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  • Abstract
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AI Technical Summary

Problems solved by technology

The processing time of the communication protocol far exceeds the transmission time of the data frame, the efficiency of the communication interface is low, the transmission delay is large

Method used

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  • Avionics any source multicast (ASM) protocol controller
  • Avionics any source multicast (ASM) protocol controller
  • Avionics any source multicast (ASM) protocol controller

Examples

Experimental program
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Effect test

Embodiment Construction

[0042] The functional block diagram of the avionics ASM protocol controller is as follows: figure 1 As shown, the avionics protocol controller includes sending queue control, receiving queue control, sending scheduling control, ASM protocol encapsulation, ASM protocol analysis and other parts. The specific implementation is as follows:

[0043] (1) Send queue control

[0044] Before communication, the host allocates a message queue storage area according to the sending communication table. Each message queue storage area is composed of multiple buffers, logically forming a circular queue, and each buffer can store a message of the maximum length.

[0045] The information interaction between the host and the protocol controller adopts the ring queue management method. Each sending message queue corresponds to a set of control information including: message queue base address QueueBase, queue head pointer Head, message maximum length MsgMaxLen and other information. The host i...

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Abstract

The invention relates to an avionics any source multicast (ASM) protocol controller. Based on an optical-fiber channel, a pure hardware circuit is adopted to realize the ASM communication protocol processing function, and the dedicated ASM protocol controller is developed. The functions of message storage management, sending scheduling, protocol encapsulation, protocol decapsulation and the like are realized. The invention has low communication cost: the ASM protocol controller encapsulates and decapsulates the ASM protocol using hardware, and the cost of a host system protocol is saved; the invention adopts a priority scheduling strategy: a protocol processor schedules communications according to the scheduling strategy of urgency, period and event message, and the transmission service quality requirements of different avionics messages are satisfied; and the invention has high-speed communication bandwidth: the ASM controller can complete the protocol processing of data within a time interval between two messages, and the transmission requirement of communications to reaching a line rate can be satisfied.

Description

technical field [0001] The invention belongs to computer hardware technology, and relates to a hardware circuit realization method of an avionics ASM protocol controller. Background technique [0002] The new generation of military aircraft avionics system uses Fiber Channel FC as the airborne unified network, and the transmission rate of a single node is 2Gb / s, which is used to transmit information such as messages, data, and images. [0003] ASM is based on the high-level communication protocol of FC network. It has the characteristics of determinism, security and low delay. It is mainly used in the backbone communication network of avionics system. [0004] The ASM communication protocol is generally processed by host software, which occupies a large amount of CPU processing resources and has a large protocol processing overhead. The processing time of the communication protocol far exceeds the transmission time of the data frame. The efficiency of the communication inte...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L12/56H04B10/12
Inventor 王红春
Owner AVIC NO 631 RES INST
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