Dynamic bandwidth allocation with optimized excess bandwidth distribution and wavelength assignment in multi-wavelength access network

Dynamic bandwidth allocation (DBA) is of great importance and interest to multichannel passive optical networks (PON). It plays a crucial role in efficiently and fairly allocating the bandwidth among all users. In this paper, we proposed an optimized excess bandwidth distribution algorithm. The excess distribution quota obtained from the algorithm can be adjusted adaptively and can further augment the efficiency and fairness of DBA. The proposed algorithm can effectively prevent excess distribution from bandwidth monopolization and over-allocation. Besides, we formulate a wavelength assignment scheme to eliminate the idle period and increase the bandwidth utilization of the network. Finally, we conduct detailed simulation experiments to research and analyze the performance and demonstrate the effectiveness of the proposed scheme.