Performance Evaluation of OPS Contention Resolution Scheme Based on SPC Wavelength Conversion

The contention resolution scheme based on single-per-channel (SPC) wavelength conversion is proposed in optical packet switching (OPS) system. The packet loss probability in the scheme is analyzed in theory and the numerical results are shown. The results indicate the packet loss probability can be reduced with the increase of wavelength converters used in contention resolution. The effect of performance improvement by increasing wavelength converters at the low-load condition is better than that at the high-load condition. Furthermore, the impact from the system parameters, such as the number of optical wavelength and input ports, is analyzed based on the proposed model. The increase of optical wavelength per fiber improves the performance rapidly, but the increase of input fibers causes the performance degradation insignificantly.