Improving Performance of All-Optical Packet Switching Network with a Modified Pulse Position Modulation Routing Table

In Previous works show that pulse-position modulation (PPM) is an effective modulation technique for all-optical packet header (correlation) processing scheme in OPS networks. However, the PPM method requires long length of PPRT entries that may result in a long packet header address correlation timeto achieve small number of entries in the routing table. In this study, we propose a modified pulse position modulation (MPPM) header processing scheme, which is the combination of the one control binary bit field and MPPM formats in packet header that is able to offer a reduction in the processing time and hence, improve the network performance. The numerical results show that the developed MPPM-based header processing scheme improves the utilization efficiency, reduces the minimum packet drop probability in comparison with conventional electronic header processing and PPM header processing schemes.