Constraint-Based Routing in Path- Protected Translucent Optical Networks Considering Fiber Nonlinearities and Polarization Mode Dispersion
In this paper we present a novel physical layer impairment (PLI) aware routing and wavelength assignment (RWA) approach combined with PLI-aware regenerator placement. We consider the dominant linear and nonlinear signal quality degrading effects in 10 Gb/s non-return to zero (NRZ) on-off keying (OOK) systems by analytical models for amplified spontaneous emission noise (ASE), filter crosstalk, group-velocity dispersion (GVD) and polarization mode dispersion (PMD) as well as cross-phase modulation (XPM) and four wave mixing (FWM). As a topology for our study we have chosen the COST266 reference network, which is a pan-European meshed network with a total of 28 nodes and 41 (bidirectional) edges. For this network demands have been defined based on a population-based model. To facilitate transmission over very long path lengths regenerator pools have been placed sparsely at certain nodes due to cost considerations. The regenerator sites are selected based on a heuristic algorithm taking into account the physical effects resulting in signal quality degradation. Due to the high cost of optical-electrical-optical (OEO) conversion as few regenerators as possible are deployed. In our investigations we assumed a 1+1 path protection scheme in the optical layer. The exact assessment of the signal quality based on the current traffic situation using our methods permits a network performance (wavelength blocking probability) comparable to an opaque network with only a small number of regenerators.
Physical layer impairment aware routing regenerator placement nonlinear fiber effects optical crosstalk optical fiber communications routing and wavelength assignment wavelength division multiplexing.
Stephan Pachnicke Peter M.Krummrich
Dortmund University of Technology,High Frequency Institute,Dortmund,Germany
国际会议
2008亚太光通信会议(Asia-Pacific Optical Communications 2008)
杭州
英文
2008-10-26（万方平台首次上网日期，不代表论文的发表时间）