GMPLS-Controlled Dynamic Optical Networks

The types of service and models of traffic in the transport networks have changed because of the increasing of IP data. A lots of researches focuses in the combination of IP and WDM at present. The wide-band of WDM can meet the growth of IP data. The evolution tendency of the transport networks results in the structure named "IP over WDM". How to change the point-to-point optical channel to the flexible and manageable optical networks is an urgent problem. In physical layer, the optical channel has become reconfigurable by the using of the ROADMs and OXCs. Generalized multi-protocol label switching (GMPLS), being developed by IETF, provides a unified control plane for the variety layer including optical layer in the control layer. GMPLS extend the capabilities from packet-based to wavelength-base. This dissertation is supported by the 10th five-years Plan Advance Research Fund Program "Reconfigurable optical add-drop multiplexer", and aims at the engineering realization. Three key research topics are selected: (1) The realization of ROADM, (2) Physical-layer considerations routing and wavelength assignment algorithm, and (3) The data communication networks (DCN) that supports the control layer in the dynamic optical networks.The main contents and innovations of this dissertation as follows:1. Different architectures of ROADM have been compared about its advantage and disadvantage, and the characteristics of the usage. A 4-degree ROADM based WSS was proposed to meet the requirement of mesh networks.2. The factors were investigated in optical transmission including the optical power, PMD and OSNR. A novel algorithm named Physical-Layer Considerations Dynamic Routing and wavelength assignment (PCDRWA) was developed. The performance of the proposed strategies was demonstrated to decrease the blocking probability through illustrative numerical examples.3. The routing protocol (OSPF-TE) in GMPLS was extended to support the algorithm with the constraint of ports in GMPLS-controlled ROADM.4. The structure of OSC which based on STM-1 was proposed. The DCN is MPLS-based for high QoS. TDM and packet is mixedly transported. It can meet the requirement of the GMPLS-based control plane for the wide-band and high QoS.5. The engineering realization of the first wavelengthsblocker-based ROADM was done including system structure, hardware, software, and system test in PRC. The result of operation showed that it can meet the requirement of design, and the ROADM has been checked and accepted.