A test bed study of network determinism for heterogeneous traffic using time-triggered ethernet
A test bed study of network determinism for heterogeneous traffic using time-triggered ethernet
复制标题
DOI：
10.1109/milcom.2017.8170786
复制
发表时间：
2017-10
期刊：
影响因子：
--
通讯作者：
Allen Starke;D. Kumar;M. Ford;J. Mcnair;A. Bell
中科院分区：
文献类型：
--
作者：
Allen Starke;D. Kumar;M. Ford;J. Mcnair;A. Bell
未来的战术通信涉及高数据速率的尽力而为的流量与实时流量一起工作，用于具有硬截止日期的时间关键型应用。不可用的带宽和/或不及时的响应可能导致不期望的甚至灾难性的结果。基于以太网的通信系统由于具有更高的带宽、更好的利用率和处理异构流量的能力而成为主要的战术网络标准之一。然而，以太网遭受不一致的性能抖动，延迟和带宽下的重负载。新兴的时间触发以太网（TTE）解决方案承诺确定性的以太网性能，容错拓扑和关键流量的实时保证。本文对TTE协议进行了研究，并建立了TTTech TTE测试床来评估其性能。通过实验研究，TTE协议被观察到提供一致的高数据速率的尽力而为的消息，确定性与非常低的抖动的时间触发的消息，和容错最小的数据包丢失使用冗余的网络拓扑结构。此外，观察到的挑战，提出了集成周期和同步开销之间的权衡。它的结论是，TTE是一个有能力的解决方案，以支持异构流量的时间关键型应用，如航空航天系统（如。飞机、航天器等），地面车辆（例如，火车、公共汽车、汽车等）和网络物理系统（例如，智能电网、物联网等）。
Future tactical communications involves high data rate best effort traffic working alongside real-time traffic for time-critical applications with hard deadlines. Unavailable bandwidth and/or untimely responses may lead to undesired or even catastrophic outcomes. Ethernet-based communication systems are one of the major tactical network standards due to the higher bandwidth, better utilization, and ability to handle heterogeneous traffic. However, Ethernet suffers from inconsistent performance for jitter, latency and bandwidth under heavy loads. The emerging Time-Triggered Ethernet (TTE) solutions promise deterministic Ethernet performance, fault-tolerant topologies and real-time guarantees for critical traffic. In this paper we study the TTE protocol and build a TTTech TTE test bed to evaluate its performance. Through experimental study, the TTE protocol was observed to provide consistent high data rates for best effort messages, determinism with very low jitter for time-triggered messages, and fault-tolerance for minimal packet loss using redundant networking topologies. In addition, challenges were observed that presented a trade-off between the integration cycle and the synchronization overhead. It is concluded that TTE is a capable solution to support heterogeneous traffic in time-critical applications, such as aerospace systems (eg. airplanes, spacecraft, etc.), ground-based vehicles (eg. trains, buses, cars, etc), and cyber-physical systems (eg. smart-grids, IoT, etc.).