Open AccessOn Finding the Multicast Protection Tree Considering SRLG in WDM Optical Networks
Author(s) -
Li Yonggang,
Jin Yaohui,
Li Lemin,
Li Longjiang
Publication year - 2006
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.06.0205.0128
Subject(s) - multicast , spare part , computer network , blocking (statistics) , computer science , tree (set theory) , distributed computing , wavelength division multiplexing , shared resource , scheme (mathematics) , engineering , mathematics , materials science , optoelectronics , wavelength , mathematical analysis , mechanical engineering
In this letter, a new sharing mechanism, SRLG sharing, is proposed, which allows the links of the same shared risk link group (SRLG) in a primary light tree to share protections in WDM optical networks. In previous studies, how to share spare resources with SRLG constraints has not been studied in multicast optical networks. In this letter, considering SRLG sharing, we propose a novel algorithm –multicast with SRLG sharing (MSS)– to establish a protection light tree. Finally, the algorithm MSS and the algorithm multicast with no SRLG sharing (MNSS) are compared through a simulation to show that our new sharing scheme of SRLG sharing is more efficient than that of no SRLG sharing in terms of spare resource utilization and blocking probability.