Distributed inter-domain lightpath provisioning in the presence of wavelength conversion

Inter-Domain Routing Scalability in Optical DWDM Networks

“…However associated inter-domain routing loads are notably higher, and alternate, simpler star-based topologies are shown to give mixed results [17]. This forms the overall motivation of the work herein, namely, to extend the framework in [16] to improve inter-domain scalability. Specifically, this is done via the design of novel, highly-scalable inter-domain triggering update policies.…”

“…Specifically, the work extends the recent effort in [16] by developing new and improved routing update/triggering schemes for full mesh topology abstraction. The paper is organized as follows.…”

“…In light of the above, a more comprehensive approach for inter-domain lightpath RWA is considered in [16]. Herein the authors develop a GMPLS-based hierarchical routing model to condense and propagate domain state using full-mesh topology abstraction.…”

“…Before presenting these new routing strategies, however, it is necessary to introduce the overall notation and inter-domain provisioning solution in [16].…”

“…Inter-domain graph H(U,E) Before detailing full-mesh topology abstraction, it is instructive to review the more basic simple node abstraction [7], [16]. This scheme performs no domain compression and simply condenses a domain into a single virtual node, Figure 1.…”