物理隔离网闸的设计与实现

对物理隔离技术和物理隔离网闸进行了分析介绍,提出了基于总线双通道循环缓冲区实时开关技术,该技术克服了原有技术的不足,大幅提高了网闸内外网间数据的交换速度和数据的实时性。给出了利用FPGA在网闸系统的SDRAM总线上实现该技术的设计,结果表明系统的数据交换速度和实时性满足了千兆级网络的应用要求。

Design and Realization of Netgap Based on Physical Isolation

The principle of the physical isolation technology and netgap is introduced. And a new theory - dual- tunnel real- time switcher with cyclic buffer based on bus is advanced. With this technology, the netgap system improves its' data exchanging rate and reduces the real- time response time. Then, the design and realization of gigabit netgap using this theory based on SDRAM bus is given. The data exchanging result of the system achieves satisfied performance, and meeting the gigabit Ethernet application.