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An analysis of FPGA-based UDP/IP stack parallelism for embedded Ethernet connectivity

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4 Author(s)
A. Lofgren ; Dept. of Comput. Sci. & Electron., Malardalen Univ., Vasteras, Sweden ; L. Lodesten ; S. Sjoholm ; H. Hansson

When designing FPGA-based Ethernet connected embedded systems the priority and necessity of requirements such as cost, area, flexibility etc. varies for each system. Simplified for most systems, it can be stated that no extra functionality than required is desired. Hence, when designing a UDP/IP stack in an FPGA a single UDP/IP stack "template" design is not suitable to effectively realize the different embedded network system requirements. We present three different UDP/IP stack cores, with different grades of parallelism and suited for various network demands. We show that the UDP/IP core area can be reduced to 1/3 of the original size with an appropriate implementation, accomplished by a trade-off between parallelism/latency and area. Furthermore guidelines are proposed on how to perform the trade-off between parallelism, area (cost), flexibility and functionality when designing an UDP/IP stack for compact embedded network systems.

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Date of Conference:

21-22 Nov. 2005