Architecting Wavelength-Switched Optical Networks with Coherent P2MP Transceivers

The recently presented coherent point-to-multipoint transceivers (P2MP-TRXs), which are enabled by digital subcarrier modulation, have been viewed as a promising substitute for the point-to-point transceivers, especially for the network segments with hub-and-spoke traffic patterns. This paper studies the network planning of wavelength-switched optical networks with P2MP-TRXs, which includes correlated routing and spectrum assignment, placement of P2MP-TRXs in groups and corresponding subcarrier assignments. We design an efficient heuristic to find near-optimal solutions in polynomial time.