Combined routing and core-spectrum assignment scheme based on spectrum status for spatial division multiplexing elastic optical networks

2020 ◽  
Author(s):  
Shixin Liu ◽  
Bokai Cheng ◽  
Cheng Hang ◽  
Jiaoliang Yu ◽  
Yutong Wang ◽  
...  
Keyword(s):  
Optical Networks ◽  
Spectrum Assignment ◽  
Spatial Division Multiplexing ◽  
Assignment Scheme

A Novel Spectrum Assignment Scheme for Time-Varying Traffic in Flexgrid Optical Networks

2018 ◽  
Vol 39 (3) ◽  
pp. 319-324
Author(s):  
Fengqing Liu ◽  
Yanfang Xu ◽  
Shilin Xiao
Keyword(s):  
Real Time ◽  
Optical Networks ◽  
Blocking Probability ◽  
Numerical Results ◽  
Time Varying ◽  
Spectrum Assignment ◽  
Assignment Scheme ◽  
Flexgrid Optical Networks ◽  
Over Time

Abstract In real-time communication, the bandwidth required by traffic may fluctuate over time, and the network should allocate spectrum flexibly to satisfy such demands. In this paper, a novel spectrum assignment scheme is proposed. It reduces the spectrum fragmentation by minimizing the number of spectrum-free windows and establishes a virtual sub-connection in a non-contiguous spectrum block for the incremental bandwidths of time-varying traffic, to eliminate the traffic relocation and interruption caused by traffic change. Numerical results demonstrate that the scheme proposed in this paper effectively reduces the network blocking probability, decreases the traffic interrupt ratio, and improves the performance of serving traffic.

Routing and spectrum assignment: A metaheuristic for hybrid ordering selection in elastic optical networks

2021 ◽  
pp. 108287
Author(s):  
Henrique A. Dinarte ◽  
Bruno V.A. Correia ◽  
Daniel A.R. Chaves ◽  
Raul C. Almeida
Keyword(s):  
Optical Networks ◽  
Spectrum Assignment ◽  
Routing And Spectrum Assignment
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