Abstract: Specially designed for avionics systems,a flow and error control mechanism over fibre channel driven by credit update is proposed.By optimizing the frame header format,the receiving end obtains the credit value through halving and drives the sending end to check and update the credit counting.Full duplex communication realizes credit count parameter management for data sender,data frame transmission error control,and triggered credit update for the receiver,which avoids resource locking and timeout response.Experimental results show that the proposed mechanism has better performance than the mechanism with relevant credit update.It can make full use of the memory resources of airborne platform.In case of limited cache for data frame receiving,the mechanism can ensure the throughput rate of big data flow message sequence transmission and improve real-time performance,which satisfies reliable and efficient data transmission in avionics networks.

Key words: fibre channel, credit, flow control, error control, avionics network, airborne platform

摘要： 针对航电系统设计要求,提出一种以信用更新为驱动的流量与差错控制机制。通过优化帧头格式,接收端以截半更新方式获取信用值,驱动发送端信用计数校对更新,同时全双工通信采用差错重传策略,实现数据发送方信用计数参数管理、数据帧传输差错控制和接收方信用触发更新三者功能的结合,解决资源死锁问题,避免发生超时响应。实验结果表明,与信用相对更新式控制机制相比,该机制能充分利用机载平台的内存资源,在接收通道数据帧缓存容量有限的情况下,保证节点间大数据流消息序列传输的吞吐率,提高实时性,满足航电网络对数据可靠高效的传输要求。

关键词: 光纤通道, 信用, 流量控制, 差错控制, 航电网络, 机载平台

CLC Number: 

• TN913.1