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Routing and Scheduling in Distributed Advance Reservation Networks

Advance reservation of connection requests is a growing focus area and a range of solutions have been proposed. However, most efforts here have focused on scheduling algorithm design and have not addressed related implementation concerns in distributed settings. As a result, most schemes imply the use of a centralized controller, posing many scalability and reliability challenges. In order to address these concerns, this paper proposes a distributed routing solution for advance reservation. Namely, new link-state data structures are defined to summarize timeline-bandwidth state without the "time-slot" constraint along with novel routing update triggering policies for timely state dissemination. A refined distributed path- computation scheme is then developed to use this propagated state. The proposed solution is analyzed using discrete event simulation.