The advance reservation of network connections is an area of growing interest and a range of service models and algorithms have been proposed to achieve various scheduling objectives, i.e., including optimization based strategies and heuristic schemes. Now given the time-shifted nature of future requests, rerouting strategies have also been considered to… (More)
Recent studies on inter-domain DWDM networks have focused on topology abstraction for state summarization, i.e. transforming a physical topology to a virtual mesh, tree, or star network. Although these schemes give very good inter- domain blocking reduction, associated inter-domain routing overheads are significant, particularly as the number of domains and… (More)
This paper studies routing scalability in multi-domain DWDM networks. Although inter-domain provision-ing has been well studied for packet/cell-switching networks, the wavelength dimension (along with wavelength conversion) poses many challenges in multi-domain DWDM settings. To address these concerns a detailed GMPLS-based hierarchical routing framework is… (More)
—As applications continue to expand, there is a growing need to provide advance reservation scheduling for higher-end virtual overlay network services. Hence this work presents an optimization formulation for this problem and studies several heuristic solutions using network simulation.
Advances in SONET/SDH technologies have introduced novel features for improved services mapping and provisioning, enabling many new avenues for new Carrier Ethernet support. However Ethernet-over-SONET studies have mostly focused on provisioning point-to-point Ethernet private line offerings. This paper considers the more challenging case of provisioning… (More)
This paper proposes three novel admission control schemes for networks supporting prioritized advance reservation. The integer linear programming model for prioritized advance reservation and the pseudo-code algorithms implementing the schemes are outlined. Detailed simulation analysis results are then presented to compare the performance of the proposed… (More)
Numerous "on-demand" immediate request (IR) schemes have been developed for provisioning connection requests in optical networks. Lately more complicated advance reservation (AR) schemes are also being investigated by the research community. However, implementing AR across multiple network domains is a very challenging problem owing to key challenges in the… (More)