Title :
Optimized routing for fault management in optical burst-switched WDM networks
Author :
Zhang, Jing ; Wang, Shuang ; Zhu, Keyao ; Song, Lei ; Datta, Debasish ; Kim, Young-Chon ; Mukherjee, Biswanath
Author_Institution :
Sun Microsystems, Menlo Park
fDate :
8/1/2007 12:00:00 AM
Abstract :
Optical burst switching (OBS) is a promising technique for supporting high-capacity, bursty data traffic over optical wavelength-division-multiplexed (WDM) networks. An optical link failure may result in a huge amount of data (and revenue) loss, and it has been an important survivability concern in optical networks. In this paper, we study the fault- management issues related with a link failure in an OBS network. We propose to use pre-planned global rerouting to balance network load and to reroute bursts after a link fails. We apply optimization techniques to pre-plan explicit backup routes for failure scenarios. Our objective is to achieve optimal load balancing both before and after a failure such that the network state can still remain stable with minimum burst-loss probability when a failure occurs. We apply the pre-planned normal and backup routing tables to an OBS network, and study the network performance after a failure occur using illustrative numerical examples. The results show that the average burst-loss probability can be significantly reduced by 60% - from an average of 0.10 to 0.04 (when the normalized link load is less than 0.5) using globally-rerouted backup routes, when compared with the scheme without global rerouting. We also observe that the burst-loss probability is reduced by 43% - from an average of 0.07 to 0.04 (when the link load is less than 0.5) if the rerouting is done using optimization techniques, when compared with shortest-path routing.for Fault Management
Keywords :
optical burst switching; optimisation; telecommunication network routing; wavelength division multiplexing; bursty data traffic; explicit routing; fault management; optical burst switching; optical burst-switched network; optical network; optical wavelength-division-multiplexed; optimization techniques; optimized routing; pre-plan explicit backup route; preplanned rerouting; resilient buffer; Assembly; Business continuity; Optical buffering; Optical burst switching; Optical fiber networks; Payloads; Routing; Telecommunication traffic; WDM networks; Wavelength division multiplexing;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
DOI :
10.1109/JSAC-OCN.2007.025106