QoS supported dynamic traffic scheduling in WDM/TDM networks with arbitrary tuning latencies

This paper proposes a dynamic traffic scheduling algorithm in single-hop WDM/TDM networks with arbitrary tuning latencies to support guaranteed QoS. To furnish different levels of QoS, two classes of traffic are considered: constant bit rate (CBR) and available bit rate (ABR). An effective bandwidth normalization scheme for ABR traffic is also derived. By applying distinct normalization schemes to CBR and ABR traffic individually, the bandwidth can be allocated more accurately and meanwhile the QoS is also guaranteed. Two slot allocation policies are also suggested to allocate the time slots to connections. The performance of proposed algorithm is evaluated and compared by simulations under different system parameters, such as wavelength number, traffic load, and tuning latency.