Spectrum Allocation Considering Crosstalk Impacts at both Fibers and Nodes in Space-Division Multiplexing Elastic Optical Networks

2019 ◽  
Author(s):  
Kosuke Kubota ◽  
Yosuke Tanigawa ◽  
Hideki Tode ◽  
Yusuke Hirota
Keyword(s):  
Optical Networks ◽  
Spectrum Allocation ◽  
Space Division Multiplexing ◽  
Space Division

scholarly journals LBFA: A Load-Balanced and Fragmentation-Aware Resource Allocation Algorithm in Space-Division Multiplexing Elastic Optical Networks

Photonics ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 456
Author(s):  
Shengyu Zhang ◽  
Kwan Lawrence Yeung ◽  
Along Jin
Keyword(s):  
Optical Networks ◽  
Blocking Probability ◽  
Optical Network ◽  
Computation Method ◽  
Resource Allocation Algorithm ◽  
Space Division Multiplexing ◽  
Space Division ◽  
Critical Issues ◽  
Joint Load ◽  
Load Balanced

We consider a space-division multiplexing elastic optical network (SDM-EON) that supports super-channels (SChs). A Sch comprises a set of contiguous frequency slots on multiple cores in a multi-core fiber. The problem of finding a lightpath using SChs involves routing, modulation, spectrum and core assignment (RMSCA). To minimize the request blocking probability (RBP), two critical issues must be addressed. First, routing and modulation assignment (RMA) should not cause hotspots, or overutilized links. Second, spectrum and core assignment (SCA) should aim at minimizing fragmentation, or small frequency slot blocks that can hardly be utilized by future requests. In this paper, a pre-computation method is first proposed for better load balancing in RMA. Then an efficient fragmentation-aware SCA is proposed based on a new fragmentation metric that measures both the spectral and spatial fragmentation. With the enhanced RMA and SCA, a joint load-balanced and fragmentation-aware algorithm called LBFA is designed to solve the RMSCA problem. As compared with the existing algorithms, simulation results show that our LBFA provides significant reduction in RBP.

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