組み込みネットワークアプリのためのXilinx Spartan3 FPGAを用いたローコストTCP/IPハードウェア実現(ネットワークプロセッサ,通信のための信号処理,無線LAN/PAN,一般)

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As multi-processor based computers and electronic devices become the norm, a further emphasis is made on achieving tasks by means of low power parallel processing. Furthermore, with the growth of Internet-based rich multimedia applications, these tasks would often require high speed network capabilities readily available. An FPGA, unlike ASIC implementations which are difficult to adopt for their lack of standards, would allow us to develop flexible and power-efficient high-speed processing systems capable of addressing the tasks at hand. In previous works we have introduced a remotely reconfigurable hardware/software complex system which is capable of exchanging virtual hardware circuits over Ethernet, as well as a proof of concept client-server architecture based web application that compresses and streams video in hardware, achieving a full-color VGA size (24bits RGB, 640x480 pixels) 20 fps video stream with throughput of 10.8Mbps. In this paper we propose a hardware TCP/IP stack implementation as an extension to this model, to enable Internet connectivity and to accelerate networking multimedia transmission. This TCP/IP stack is both modular, allowing direct connection of embedded applications without CPU or PCI bus resource usage through a common on-chip bus architecture, and extensible as it consists of independent blocks that can easily be changed in order to support future changes in protocols. This framework simplifies the development of networking applications since Internet Protocol (IP) packets, UDP datagrams and TCP segments are all directly processed in hardware. A software application needs only to interact with a memory buffer to use the network resources of the system. The applications of this modular TCP/IP stack vary in a wide range of devices such as multimedia content based devices, robotics and network security appliances. These applications will be able not only to gather and distribute information, but also to be reconfigured through the web. The proposed system is implemented in Xilinx's low-end SpartanS FPGA, which operates at 66MHz with achieved throughput of 100Mbps.
2011-02-24

組み込みネットワークアプリのためのXilinx Spartan3 FPGAを用いたローコストTCP/IPハードウェア実現(ネットワークプロセッサ,通信のための信号処理,無線LAN/PAN,一般)

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