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Towards High-Fidelity Emulation of Dynamic Network Channel Characteristics

Xu Zhu Baokang Zhao Dapeng Wang Huanren Zhou Xiaodong Han Feng Tian
Jul 2026 · International Conference on Optical Communications and Networks · pp. 1-3 · 0 citations · 11 references

Abstract

High-precision and large-capacity network delay emulation is essential for algorithm validation and system testing in cloud computing, satellite communications and vehicular IoT. This paper proposes a novel FPGA-based high-bandwidth delay emulation method, which buffers packets in on-chip Ultra RAM, maps packet identifiers to RAM addresses via a single-cycle 32-bit parallel CRC32 hash, and schedules packets by target egress timestamps using a Push-In First-Out (PIFO) mechanism. Experiments confirm that the system achieves lossless emulation of 1.5 ms network delay at 10 Gbps line rate.

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