本文给出了一种基于以太网卡的实时网络的体系结构，并详细描述了在传输层如何实现数据传输的时间确定性。

In this paper we present a real-time network architecture based on Ethernet card and describe how to implement it on transport layer in detail.

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DMA引擎的主要功能是进行主机和网卡之间的接收和发送数据以及描述符的传送。

The main function of DMA engine is to handle the receive and transmit data and descriptor transfers between the host memory and the NIC.

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