Orthogonal Frequency Division Multiplexing (OFDM) has recently been proposed as a modulation
technique. For optical networks, because of its good spectral efficiency, flexibility, and tolerance to
impairments, optical OFDM is much more flexible compared to traditional WDM systems, enabling elastic
bandwidth transmissions, and optical networking is the future trend of development. In OFDM-based
optical network the research of blocking rate has very important significance for network assessment.
Current research for WDM network is basically based on a fixed bandwidth, in order to accommodate the
future business and the fast-changing development of optical network, our study is based on variable
bandwidth OFDM-based optical networks. We apply the mathematical analysis and theoretical derivation,
based on the existing theory and algorithms, research blocking probability of the variable bandwidth of
optical network, and then we will build a model for blocking probability.