Abstract
An all-optical orthogonal frequency division multiplexing (OFDM) network coding scheme is proposed for multigranularity multicast traffic transmission in flexible-grid optical networks. Based on all-optical OFDM technology, diverse bitrates traffic is transmitted efficiently by the proposed architecture with flexibility and scalability in spectrum allocation. Moreover, the integration of network coding technology within the optical multicast network improves resource utilization efficiency and enhances transport capacity. The feasibility of an all-optical OFDM network coding scheme for multigranularity multicast traffic transmission is analyzed, and performance evaluations are performed on transmitting diverse bitrate traffic, respectively. The relevant simulation results show that various bitrate multicast traffic demand can be transmitted successfully by the proposed scheme, and spectrum resources can also be allocated to satisfy flexible multicast traffic demand dynamically and efficiently. Furthermore, synchronization for network coding is also investigated. Tolerance of misalignment is improved by the approach to stretch subcarrier signal pluses, and the difficulty of pulse alignment is also reduced.
Published Version
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