Emulation of Network Path Quality Indicators

The current network emulators commonly have bad versatility and their emulation fidelity is not high. Based on the principle of network emulation, this essay designs and implements a network path quality indicators emulation system, which can be transparently series deployed on a network path and change the performance of this path. The main tasks are: achieves a "Transparent Bridge" on Windows platform, using WinPcap packet capturer, gives the quality indicators emulation algorithms and models, studies the relationships between the indicators of network quality and the emulation algorithms has been improved and optimized based on this, designs, implements and verifies the emulation system. The emulation system has good cross-platform features, it achieves the frame-level emulation in the link layer, so it has a high fidelity.