A contention resolution scheme, P-cycle auto-switching (PCAS), is proposed in wavelength-switched optical networks (WSONs) based on generalized multi-protocol label switching (GMPLS) to solve backward blocking. This system permits the preferable request and switches the other to a backup path generated by the P-cycle. Simulation results show that the PCAS scheme is effective in mitigating backward blocking, especially under concentrated load.
© 2010 Chinese Optics Letters
Lianxing Hou, Yueming Lu, Junhua Wang, and Yuefeng Ji, "Design of contention resolution over backup path in path computation element based wavelength-switched optical networks," Chin. Opt. Lett. 8, 372-376 (2010)