Link Resource-Aware RMSA Algorithm for Advance Reservation Requests in Semi-Filterless Optical Networks

This paper investigates the routing, modulation, and spectrum assignment (RMSA) problem for advance reservation (AR) requests in semi-filterless optical networks (semi-FONs). A link resource-aware (LRA) algorithm consisting of three parts is proposed. First, request scheduling phase, a sorting strategy based on flexible window size starting time schedules AR with respect to time. Next, routing evenly distributes across network resources, thereby avoiding blocking due excessive resource occupation single or few links. In frequency–time block-based metric employed measure availability each block requests. sum two factors: distance boundaries, interval between start earliest Our simulation results demonstrate that proposed LRA has lower probability compared benchmark algorithms.