Multi-domain Optical Network Survivability And Routing And Wavelength Allocation

With the increase of the scale of optical netwoks, the optical networks is divided into many domains for security and administrative considerations.Namely,the survivability research and routing wavelength assignment in multi-domain optical networks becomes a hot topic. The survivability research and routing wavelength assignment in single domain have done a large amount works.But, they all based on that each node knows the complete physical topology and resource allocations.To achieve scalability and due to security and administrative considerations,each domain only advertise reachability information in multi-domain networks.It leads to that the survivability and routing wavelength assignment algorithm of single optical domains cannot be used in multi-domain optical networks.Topology aggregation can resolve the above challenges in multi-domain optical networks.We use the topology aggregation to resolve the survivability and routing wavelength assignment of the multi-domain optical networks.The second chapter describes several topology aggragtion technologies.Compare there spatial complexity and the precision.The full mesh topology aggregation is most exact, but the routing overhead is worst.Simple node topology aggregation has the smallest overhead, but it is not exact.Spanning tree and star topology are less exact than full mesh, but the overheads are smaller than it.The third chapter describes a segment-shared protection algorithm for multi-domain optical mesh networks. In SSPA, each gateway node of each domain maintains a virtual topology of multi-domain mesh networks by advertising full mesh aggregated topology among the domains and a complete physical topology of local domain but interior node only has complete physical topology of local domain. Second, an inter-domain working path is computed on the virtual network for each request. For each inter-domain link of the work path, an inter-domain segment-backup path is also sketched. Finally, the inter-domain working path and inter-domain segment-backup path are mapped into physical paths. A segment-backup path is computed for each segment-working path in each single-domain. The SSPA can achieve 100% protection. The fourth chapter describes a detailed hierarchical routing GMPLS-based framework for provisioning all-optical DWDM optical networks. First, we use the three kinds of topology aggregation technology including full mesh, simple node and spanning tree for interdomain routing. Then we use the GMPLS RSVP provisioning all-optical DWDM optical networks.