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Multiservice, multirate IP transmission over OCDMA network

In this paper, we propose a new Internet protocol (IP) traffic transmission architecture over optical code-division multiple-access (OCDMA) network capable of providing multiservice, multirate transmissions. The new architecture is independent of the OCDMA scheme employed. The main idea is to use multi-weight multi-length optical orthogonal code (MWML-OOC) as signature sequence of an incoherent OCDMA system to achieve multiservice and multirate transmissions. Furthermore, in order to evaluate the packet error rate (PER) of the proposed multiservice IP transmission, we derive a bit error rate (BER) expression of a MWML-OOC OCDMA system. The network performance is analyzed in terms of the channel utilization of the users' classes. The simulation results show that better performance is obtained by users defined with high-weight code. This is especially evident when the channel utilization is low.