| The optical network can provide the answer to the acute need for the very-highbandwidth transmission systems, since WDM and OTDM offer two possible techniques to exploit the bandwidth of optical fibers. More recently, the WDM-TDM multiplexing method has been proposed to make the most of the bandwidth resource. A WDM-TDM hybrid network employs the WDM-TDM multiplexing method.; In this project, we deal with the bandwidth allocation problem in WDM-TDM hybrid networks. We concentrate on the time slot assignment to a connection in a real-time manner. The problem that we confront is how many time slot are needed to assign to a connection in order to guarantee its QoS requirement. Moreover, we would like to update the assignment periodically to follow the varying traffic. The goal is to increase the time slot utilization efficiency while satisfying the QoS.; A time slots allocation method is proposed in this project. The time slots are assigned based on the history information such as the number of time slots assigned and the system performances in the previous periods. Simulations have been done in order to evaluate the performance of the method proposed. The results show that the proposed method worked effectively and the system performances have been improved comparing with the conventional time slots allocation methods. |
