民用飞机航电数据网络带宽资源分配优化设计

Optimization design of bandwidth resource allocation for civil aircraft avionics data network

民用飞机航电数据网络在设计过程中,通过对带宽资源的合理分配,来满足网络成员系统的数据传输需求。而在设计过程中,存在因网络带宽需求分布的非均匀性等因素造成的局部带宽资源不足的问题,因此需要在初步带宽资源分配结果上进行局部优化设计。提出一种通过网络带宽资源使用率最高的链路和端系统进行识别,以及进行针对性物理链路连接关系调整,从而实现降低交换机之间链路带宽资源使用率的方法。通过网络仿真对该方法的优化效果进行了分析,发现这种方法能够降低网络局部链路的较高带宽资源使用率,单轮优化的有效降幅超过15%。该网络带宽资源分配优化设计方法,一方面能够有效解决因飞机网络局部带宽不足问题,降低由此导致的网络拥堵、排队、丢包等风险,确保网络确定性;另一方面还能尽量保持当前分配结果,减少设计优化变更对网络时延性能和网络布线方面的影响。

In the design process of civil aircraft avionics data network,bandwidth resources is allocated reasonably to meet the data transmission requirements of network member systems.Due to the non-uniformity of network bandwidth requirements distribution and other factors,there may be local bandwidth resources insufficiency in the design process,so it is necessary to carry out a local optimization design based on the preliminary bandwidth resource allocation results is necessary.This paper proposes a method to reduce the utilization rate of link bandwidth resources between switches by identifying the link and end system with the highest utilization rate of network bandwidth resources,and adjusting the connection relationship of physical links.Taking a typical ARINC664 network as an example,the reduction of single-round optimization is over 15%.On the one hand,the optimization design method of network bandwidth resource allocation can effectively solve the problem of insufficient local bandwidth of aircraft network,reduce the risk of network congestion,queuing and packet loss,and ensure the network certainty;On the other hand,the current distribution results can keep the current allocation results as much as possible and minimize the impact of design optimization changes on network delay performance and network routing.