Backup reprovisioning with partial protection for disaster-survivable software-defined optical networks
- 437 Downloads
As networks grow in size, large-scale failures caused by disasters may lead to huge data loss, especially in an optical network employing wavelength-division multiplexing (WDM). Providing 100 % protection against disasters would require massive and economically unsustainable bandwidth overprovisioning, as disasters are difficult to predict, statistically rare, and may create large-scale failures. Backup reprovisioning schemes are proposed to remedy this problem, but in case of a large-scale disaster, even the flexibility provided by backup reprovisioning may not be enough, given the sudden reduction in available network resource, i.e., resource crunch. To mitigate the adverse effects of resource crunch, an effective resource reallocation is possible by exploiting service heterogeneity, specifically degraded-service tolerance, which makes it possible to provide some level of service, e.g., reduced capacity, to connections that can tolerate degraded service, versus no service at all. Software-Defined Networking (SDN) is a promising approach to perform such dynamic changes (redistribution of network resources) as it simplifies network management via centralized control logic. By exploiting these new opportunities, we propose a Backup Reprovisioning with Partial Protection (BRPP) scheme supporting dedicated-path protection, where backup resources are reserved but not provisioned (as in shared-path protection), such that the amount of bandwidth reserved for backups as well as their routings are subject to dynamic changes, given the network state, to increase utilization. The performance of the proposed scheme is evaluated by means of SDN emulation using Mininet environment and OpenDaylight as the controller.
KeywordsSoftware-defined optical network (SDON) Optical backbone network Disaster survivability Backup reprovisioning Degraded-service tolerance Risk-aware provisioning
- 2.Zhang, J., Zhu, K., Mukherjee, B.: Backup reprovisioning to remedy the effect of multiple link failures in WDM mesh networks. IEEE J. Sel. Areas Commun. 24(8), 57–67 (2006)Google Scholar
- 6.Sgambelluri, A., et al.: Generalized SDN control for access/metro/core integration in the framework of the interface to the Routing System (I2RS). IEEE Globecom Workshops (2013)Google Scholar
- 9.Kim, S., Lumetta, S.: Evaluation of protection reconfiguration for multiple failures in WDM mesh networks, IEEE/OSA optical fiber communications (OFC) conference, Atlanta, GA, (Mar 2003)Google Scholar