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GMPLS-based transparent optical networks suffer from accumulation of physical layer impairments (PLIs) along the optical path and inefficient wavelength utilization due to wavelength continuity constraint. To increase the optical reach, resource utilization, and average call acceptance ratio, network operators resort to translucent optical networks in which a limited number of regenerators are placed...
GMPLS-based transparent optical networks suffer from accumulation of physical layer impairments (PLIs) and wavelength continuity constraint along the transparent optical path. To increase optical reach, resource utilization, and average call acceptance ratio (and hence the revenues), network operators resort to translucent optical networks. In these networks a limited number of regenerators are placed...
Standard GMPLS protocols used for dynamic establishment of lightpaths in transparent optical networks suffer from lack of physical layer impairments (PLIs) information, which makes it difficult to evaluate optical feasibility. In this paper, we compare two impairment aware (IA)-GMPLS architectures: signalling based-in which RSVP-TE is extended to carry PLIs and hybrid architecture-in which RSVP-TE...
We propose a hybrid control plane architecture, in which both RSVP-TE and OSPF-TE are extended to carry PLIs information and disseminate wavelength availability information, respectively, for impairment-aware routing in transparent optical networks. The results suggest that, hybrid approach provides good trade-off between control overhead and network performance.
In transparent optical networks, physical layer impairments (PLIs) incurred by non-ideal optical transmission media accumulate along an optical path, and the overall effect determines the feasibility of the lightpaths. If the received signal quality is not within the receiver sensitivity threshold, the receiver may not be able to correctly detect the optical signal. Hence it is important to understand...
WiMAX is one of the most promising emerging broadband wireless technologies. As a consequence, data transfer performance optimization represents a crucial issue due to TCP limitations in wireless environment. In this study, we focus on the overhead deriving from the multilayer ARQ employed at the link and transport layers. To the aim of reducing unnecessary burden on the wireless link, we propose...
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