Wu Runze

A Dynamic Bandwidth Allocation Scheme for GPON Based on Traffic Prediction

In order to improve the performance of Gigabit Passive Optical Network(GPON) systems, a novel dynamic bandwidth allocation(DBA) scheme called P-DBA based on traffic prediction for GPON is proposed, which can better meet the optical networks technical requirements of high bandwidth, low delay and low packet loss rate. Using the high-order moving average model, P-DBA scheme predicts the amount of high-priority traffic arriving during the waiting period, as a basis for bandwidth allocation, so as to ensure the performance of high priority services. Simulation results show that the P-DBA scheme proposed in this paper has good performances on latency and packet loss rate.

An adaptive multi-object routing algorithm in WDM optical networks

Different dynamic routing and wavelength assignment algorithms for WDM optical networks are described in this paper. A new dynamic algorithm based on the layered graph model and called Multi-object Optimal Algorithm (MOA) is proposed. A distinguished feature of MOA algorithm is that it employs more accurate network information than the existing algorithms on the availability of both the number of available wavelengths and the hops of the lightpath in deciding the routing and the wavelength assignment. In this paper, the detailed information per link is analyzed and the allocation of network resources is optimized under dynamic service traffic. Simulation results show that the algorithm MOA performs much better than some proposed traditional algorithms with comparable computation time.