Research And Design Of Flow Control And Storage Resource Scheduling Mechanism Of FC-AE-1553 Network

The Fibre Channel technology developed for the avionics environment regulated by the Fiber Channel-Avionics Environment-1553 protocol set(referred to as FC-AE-1553)has high transmission bandwidth,low latency,low error rate and seamless compatibility with traditional Military-Standard-1553(MIL-STD-1553)bus protocol features,so it has a wide range of applications in the aerospace field.At present,for the transmission of deterministic services in the FC-AE-1553 network,the bandwidth allocation principle of "allocation on demand" is mostly used;for the transmission of non-deterministic services,the flow control of Fibre Channel layer 2(FC-2)is generally used Mechanism to control data interaction.However,the traditional flow control scheme under the existing flow control protocol still has the problems of low throughput,excessive maximum and average delay.In addition,the dynamic change of FC-AE-1553 network traffic makes the dynamic allocation of storage resources necessary.This paper studies the transmission of non-deterministic services in the FC-AE-1553 network based on the flow control mechanism and the dynamic allocation of its storage resources.The main work content and research results are as follows.(1)According to the actual needs of FC-AE-1553 network transmission of non-deterministic services,this paper proposes an adaptive flow control scheme based on cache space sharing and dynamic adjustment of port credit value.The goal of this scheme is to increase the network throughput and reduce the network delay.According to the simulation verification of the network simulation platform built on OPNET,compared with the traditional flow control scheme,under the condition of network load balancing,the throughput of the adaptive flow control scheme is increased by 30%,and the average delay is reduced by 35%;Under unbalanced conditions,the throughput of the adaptive flow control scheme increased by 55%,and the average delay was reduced by 70%.(2)In response to the problem that the storage resource scheduling of the FC-AE-1553 network is not flexible enough,this paper has designed a scheduling strategy for dynamic storage resources applied to the FC-AE-1553 network.Node resources are pooled and optimally adjusted according to network needs:the storage space of storage nodes in the network is dynamically and adaptively allocated to different computing nodes according to the real-time traffic in the network.It has been verified by simulation that under the condition of network load balancing,the dynamic storage resource scheme increases the utilization of storage space of storage nodes in the network by 25%;under the condition of unbalanced network load,the dynamic storage resource scheme enables storage in the network The utilization rate of nodes has been increased by 40%.(3)According to the actual application requirements,the visual interface of the FC-AE-1553 network simulation platform is developed.JAVA SWING and OPNET are used for joint simulation.The OPNET interface function is used to dock the JAVA SWING interface,making the configuration of each simulation parameter more intuitive.The statistical extraction of the results is more clear,and the user’s operation is more convenient and quicker.