Dual DEB-GPS scheduler in E-PON and its expansion for delay-constraint multicasting services

Abstract

Optical Network is promise to support the future huge bandwidth requirement of the Internet. Even though optical network can provide large bandwidth, it is important to guarantee the delay and delay variation constraint to guarantee the end-to-end QoS in optical networks mechanism. Therefore, both of the access networks and the backbone networks have to support the delay and delay variation constraint for guaranteed end-to- end QoS. While in recent years the telecommunications backbone has experienced substantial growth, little has changed in the access network. Ethernet passive optical networks, which represent the convergence of low-cost Ethernet equipment and low-cost fiber infrastructure, appear to be the best candidate for the next-generation access network. E-PON supports efficiently the increased Internet data traffic and efficient bandwidth assignment function by which the shared upstream bandwidth in the broadband access networks. In this thesis, when different types of incoming sources are mapped into QoS-aware source and Best-Effort (BE) source, we propose the Dual-GPS scheduler in E-PON that has the characteristics to provide delay and delay-constraint application, and maximizes the bandwidth to best-effort service. When transmit upstream data in E-PON, The proposed scheme supports the control capabilities of delay and delay-variation for required QoS flow through the novel bandwidth assignment scheme. Simulation results show that our scheme outperforms the conventional bandwidth allocation scheme in controlling the delay and delay-variation of E-PON system. In the backbone networks, we apply the multicast application and discuss the protocol architecture to support the delay and delay variation constraint. Also, this thesis discusses the design problem of Routing and wavelength assignment schemes in wavelength routed optical backbone networks. Furthermore, we discuss the multi LLID (Logical Link Identification) for supporting the multicast in ...