航空电子全双工交换式以太网（AFDX）是一种成熟的民机机内网络技术，已在空客A380等大型客机中得到应用。随着民机航电系统功能日趋复杂，机内设备之间的复杂交联关系为有线网络的组网和部署带来了全新挑战，并引发SWaP等问题，从而进一步限制了传统有线网络的发展；5G等一系列无线通信技术成为解决上述问题的一种思路。考虑到机内网络强实时高可靠特征，需要在保证性能不降级的情况下对5G无线接入的机内混合网络进行研究。本文提出一种基于5G的机内无线有线混合组网的网络拓扑架构，并实施了流量无线接入设计；基于该架构，通过随机网络演算，利用切诺夫边界定理，建立了机内5G无线混合组网的流量端到端延迟分析模型；参考A380网络拓扑，构建大规模机内混合组网数值仿真拓扑架构，对无线有线混合组网条件下的消息传输延时进行数值仿真分析，结果表明：相比于原AFDX有线网络，在网络延迟平均牺牲5%的基础上，即可实现5G无线混合网络的接入。

Avionics Full-Duplex switched ethernet （AFDX） is a mature airborne networking technology for civil aircraft， and has been applied in large passenger aircraft such as Airbus A380. With the increasingly complex functions of civil aircraft avionics system， the complex cross-linking relationship between aircraft equipment has brought new challenges to the networking and deployment of wired network and caused the problems such as SWaP， which further limited the development of traditional wired network. 5G and a series of wireless communication technologies have become a new trend to solve the above problems. Considering the strong real-timeliness and high reliability of airborne network， it is necessary to investigate the airborne hybrid network with 5G wireless access without degradation of performance. In this paper， we propose a network topology architecture for in-flight wireless-wireline hybrid network based on 5G， and implement a traffic wireless access design. Based on this architecture， a traffic end-to-end delay analysis model of in-flight 5G wireless hybrid network is established by using the Chernoff boundary theorem and stochastic network calculus. Referring to the A380 network topology， a simulation topology for large-scale airborne network is constructed， and the message transmission delay under the condition of wireless wired hybrid network is numerically simulated and analyzed. The results show that compared to the original AFDX wired network， the5G wireless hybrid network access can be achieved on the basis of an average network delay reduction of 5%.