Abstract
We investigate the survivable traffic grooming problem with inverse multiplexing in telecommunication mesh networks employing next-generation SONET/SDH and WDM. With the support of virtual concatenation, a connection of any bandwidth can be provisioned as several subconnections (i.e., inverse multiplexed) over diverse paths. Therefore, it is important to efficiently groom and protect these low-speed subconnections onto high-capacity wavelength channels, considering the typical constraints. We propose and investigate the characteristics of survivable multipath traffic grooming with protection-at-connection and protection-at-lightpath levels for grooming connections with shared pro- tection, subject to the constraints of the inverse-multiplexing factor, differential-delay constraint, and grooming ports. Since this problem is -complete, we propose effective heuristics using a novel analytical model. Our results show that (1) the network performance, in metrics of bandwidth blocking ratio and resource overbuild, can be notably improved by exploiting the inverse-multiplexing capability, (2) tight constraints have negative impact on performance, (3) protection-at-connection performs better in most cases of multipath provisioning when the constraints are not too tight, and (4) protection-at-lightpath achieves better performance when the number of grooming ports is moderate or small.
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
Sheng Huang, Chip Martel, and Biswanath Mukherjee
J. Opt. Commun. Netw. 2(6) 368-380 (2010)
Ferhat Dikbiyik, Massimo Tornatore, and Biswanath Mukherjee
J. Opt. Commun. Netw. 6(2) 127-137 (2014)
Chengyi Gao, Hakki C. Cankaya, Ankitkumar N. Patel, Jason P. Jue, Xi Wang, Qiong Zhang, Paparao Palacharla, and Motoyoshi Sekiya
J. Opt. Commun. Netw. 4(3) 259-270 (2012)