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Flexible, efficient and robust real-time communication with server-based Ethernet Switching

机译:通过基于服务器的以太网交换实现灵活,高效和强大的实时通信

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The information exchanged in Networked Embedded Systems is steadily increasing in quantity, size, complexity and heterogeneity, with growing requirements for arbitrary arrival patterns and guaranteed QoS. One of the networking protocols that is becoming more common in such systems is Ethernet and its real-time Ethernet variants. However, they hardly support all the referred requirements in an efficient manner since they either favour determinism or throughput, but not both. A potential solution recently proposed by the authors is the Server-SE protocol that uses servers to confine traffic associated to specific applications or subsystems. Such an approach is dynamically reconfigurable and adaptive, being more bandwidth efficient while providing composability in the time domain. This paper proposes integrating the servers inside the Ethernet switch, boosting both the flexibility and the robustness of Server-SE, allowing, for example, the seamless connection of any Ethernet node. The switch is an FTT-enabled Ethernet Switch and the paper discusses two specific ways of integrating the servers, namely in software or in hardware. These options are described and compared analytically and experimentally. The former favours flexibility in the servers design and management while the latter provides lower latency.
机译:在网络嵌入式系统中交换的信息在数量,大小,复杂性和异构性方面都在稳步增长,对任意到达模式和有保证的QoS的要求也在不断提高。在此类系统中越来越常见的网络协议之一是以太网及其实时以太网变体。但是,它们几乎不以有效的方式支持所有提到的需求,因为它们要么支持确定性,要么支持吞吐量,但不能同时支持两者。作者最近提出的一种潜在解决方案是Server-SE协议,该协议使用服务器来限制与特定应用程序或子系统相关的流量。这种方法是动态可重新配置和自适应的,带宽效率更高,同时在时域提供可组合性。本文提出将服务器集成到以太网交换机中,以提高Server-SE的灵活性和鲁棒性,例如,允许任何以太网节点的无缝连接。该交换机是启用了FTT的以太网交换机,并且本文讨论了两种集成服务器的特定方式,即以软件方式还是以硬件方式。对这些选项进行了描述,并进行了分析和实验比较。前者支持服务器设计和管理的灵活性,而后者则提供了较低的延迟。

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