航空电子网络上音视频应用的需求日益剧增，对网络的带宽及服务质量都提出了更高的要求。音视频传输AVB（Audio Video Bridge）以太网络在传统以太网上提供时间同步和低延迟的音视频流服务，因而受到航电应用的关注。分析了AVB协议，针对航电环境下信息交换需解决的问题，提出了时间触发AVB网络方案，研究了其实时性传输机制和流量映射等模型；结合某综合航电系统的案例，构建了AVB网络的系统架构，仿真结果表明时间触发AVB网络有望满足分布式综合模块化航空电子（DIMA）系统实时性需求，并且比AFDX网络具有优越性。

The demand for audio/video applications in avionics network is increasing rapidly.There are highly requirements for network bandwidth and quality of service.Audio/Video Bridging (AVB) technology can provide a synchronized and low-latency audio/video service in traditional Ethernet network,and therefore it has received attention in avionics applications.On the basis of analyzing AVB protocol,a time-triggered AVB transmission mechanism is proposed with the real-time guarantee and a traffic mapping model for message exchange in avionics network.The system architecture of AVB is constructed as a case study for an integrated avionics system.The simulation results indicate that the time-triggered AVB is expected to meet transfer needs in DIMA and is superior to AFDX.