QoT-aware Grooming, Routing, and Wavelength Assignment (GRWA) for Mixed-Line-Rate translucent optical networks

2013 ◽  
Vol 10 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Zhao Juzi ◽  
Suresh Subramaniam ◽  
Maite Brandt-Pearce
Keyword(s):  
Optical Networks ◽  
Routing And Wavelength Assignment ◽  
Wavelength Assignment ◽  
Translucent Optical Networks ◽  
Mixed Line ◽  
Mixed Line Rate

A Novel Dynamic Physical Layer Impairment-Aware Routing and Wavelength Assignment (PLI-RWA) Algorithm for Mixed Line Rate (MLR) Wavelength Division Multiplexed (WDM) Optical Networks

2016 ◽  
Vol 37 (4) ◽  
Author(s):  
Sridhar Iyer
Keyword(s):  
Optical Networks ◽  
Phase Modulation ◽  
Routing And Wavelength Assignment ◽  
Physical Layer ◽  
Data Rate ◽  
Wavelength Assignment ◽  
Wdm Optical Networks ◽  
Modulation Formats ◽  
Mixed Line ◽  
Mixed Line Rate

AbstractThe ever-increasing global Internet traffic will inevitably lead to a serious upgrade of the current optical networks’ capacity. The legacy infrastructure can be enhanced not only by increasing the capacity but also by adopting advance modulation formats, having increased spectral efficiency at higher data rate. In a transparent mixed-line-rate (MLR) optical network, different line rates, on different wavelengths, can coexist on the same fiber. Migration to data rates higher than 10 Gbps requires the implementation of phase modulation schemes. However, the co-existing on-off keying (OOK) channels cause critical physical layer impairments (PLIs) to the phase modulated channels, mainly due to cross-phase modulation (XPM), which in turn limits the network’s performance. In order to mitigate this effect, a more sophisticated PLI-Routing and Wavelength Assignment (PLI-RWA) scheme needs to be adopted. In this paper, we investigate the critical impairment for each data rate and the way it affects the quality of transmission (QoT). In view of the aforementioned, we present a novel dynamic PLI-RWA algorithm for MLR optical networks. The proposed algorithm is compared through simulations with the shortest path and minimum hop routing schemes. The simulation results show that performance of the proposed algorithm is better than the existing schemes.

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