Multi-service path switching in all-optical GMPLS core network

In this paper, we present a novel labeling scheme for multi-service path switching in the all-optical generalized multiprotocol label switched (GMPLS) core networks. In this scheme, we employ the multi-length variable-weight optical orthogonal code (MLVW-OOC) as a multiplexing signature sequence and identifying label. In order to analyze the performance of the network, the probability of error is evaluated for arbitrary number of classes and cross-correlation values. Furthermore, the probability of performance degradation is investigated by considering the activity coefficient of connected paths. To assure the demanded performance, label distributed protocol (LDP) is accommodated by a controlling mechanism which limits the number of connected paths. Finally, a four-class network is designed by the proposed labeling scheme and the probabilities of error and the performance degradation are investigated; results indicate that decreasing the upper bound of the connected paths will reduce the probability of the performance degradation.