Static manycast advance reservation in split-incapable optical networks

Recent explosion of high-bandwidth applications and scientific collaboration has expedited the need for scheduled transmission of data to multiple scientific sites around the world. Advance reservations (AR) promote efficient bandwidth utilization, particularly when demands are high. The collaborative nature of modern science calls for more flexible point-to-multipoint distribution paradigms, such as manycasting. Combining AR and manycast communication mechanisms enables intelligent resource utilization in optical networks to support future e-science applications. Limiting the adoption of point-to-multipoint communication is the physical handicap that many optical crossconnects are Split-Incapable (SI), i.e., all-optical splitting of signals is not supported, making optical AR manycasting infeasible. In this paper, we adapt solutions which have previously only been considered in immediate reservation (IR) scenarios to provide manycasting as a multi-hop logical overlay to the unicast-only optical layer. We develop ILPs and heuristics to evaluate the resource consumption for various AR traffic scenarios ¹.