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Several lightpaths can be switched as a single entity, so that only one pair of transmission ports will be consumed at every intermediate node, which facilitates port savings in Wavelength-Division Multiplexing (WDM) optical networks. However, in Elastic Optical Networks (EONs), the lightpath does not occupy a fixed wavelength but a group of continuous and orthogonal subcarriers with the flexible...
To realize high-speed big data transmission, we combine the advantages of Nyquist Super-channel and Software Defined Optical Networks (SDON), thus establishing the SDNyquist platform that dynamically manages the whole optical network. This platform has the features of flexible resource allocation, high spectrum efficiency and global network optimization with the help of Routing, Modulation Level and...
This paper studies the Hamiltonian cycle protection method in survivable WDM mesh networks and propose a new heuristic algorithm called differentiated Hamiltonian cycle protection (DHCP). Compared to conventional algorithm, DHCP obtains significant improvement in resource utilization ratio and blocking probability.
This paper proposes a novel Differentiated Domain Protection (DDP) algorithm to address survivability in multi-domain optical networks. In order to ensure the principle of transparent management in multi-optical domains, DDP abstracts the multi-domain optical networks to Virtual Topology Graph (VTG) to solve the inter-domain routing. In order to satisfy the survivable requirements of different domains,...
In this paper, we propose a new algorithm, enhanced differentiated services protection (EDSP), to satisfy the multiple services grades under multi-link failures in WDM optical networks. We consider three services grades, i.e., diamond grade, golden grade and economy grade. For demand with economy grade, EDSP only computes a primary path and does not consider protection. For demand with Golden grade,...
This paper proposes a new survivable algorithm, enhanced shared-path protection (ESPP), to tolerate multi-link failures in WDM optical networks. In ESPP, we consider the load balancing to reduce the blocking probability, use resources sharing to save backup resources, and perform recovery escalation to carry the affected traffic. Compared with the conventional algorithm, ESPP has better resource utilization...
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