scholarly journals Dynamic adaptive spectrum allocation in flexible grid optical network with multi‐path routing

2020 ◽  
Author(s):  
Ujjwal Ujjwal ◽  
Neha Mahala ◽  
Jaisingh Thangaraj
Keyword(s):  
Optical Network ◽  
Spectrum Allocation ◽  
Flexible Grid

Research on CLIB Routing and Spectrum Allocation Algorithm in Elastic Optical Networks

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Li Li ◽  
Zhai Ya-Fang ◽  
Li Hong-Jie
Keyword(s):  
Optical Networks ◽  
Blocking Probability ◽  
Rapid Development ◽  
Optical Network ◽  
Spectrum Allocation ◽  
Mobile Internet ◽  
High Definition ◽  
Allocation Algorithm ◽  
High Bandwidth ◽  
Routing And Spectrum Allocation

AbstractWith the rapid development of mobile Internet, high-definition video and cloud computing, users’ bandwidth demands are not only larger and larger but also more and more diverse. To solve this problem, there searchers put forward the concept of elastic optical network (EON). EON adopts the transmission mode of elastic grid, which can allocate spectrum resources flexibly and meet high bandwidth and diversity requirements at the same time. Routing and spectrum allocation (RSA) is an important issue in EON. In this paper, we present a heuristic algorithm named constrained-lower-indexed-block (CLIB) allocation algorithm for the RSA problem. The algorithm is based on the K candidate paths. When there are available spectrum blocks on multiple candidate paths, if the increase of the path length does not exceed a given threshold, the lower index spectrum would be selected for the connection request on a longer path. The aim of the algorithm is to concentrate the occupied frequency slices on one side of the spectrum and leave another side of the spectrum to the later arrived connection requests as much as possible, to reduce the blocking probability of connection requests. Simulation results show that comparing with the first-last-fit and hybrid grouping algorithms, the CLIB algorithm can reduce the blocking probability of connection requests.

Scalable Virtual Optical Network Mapping over Software-Defined Flexible Grid Optical Networks

2015 ◽  
Author(s):  
Xi Wang ◽  
Mukul R. Prasad ◽  
Fan Yu ◽  
Indradeep Ghosh ◽  
Paparao Palacharla ◽  
...  
Keyword(s):  
Optical Networks ◽  
Optical Network ◽  
Network Mapping ◽  
Flexible Grid

scholarly journals Routing, Modulation Format, Baud Rate and Spectrum Allocation in Optical Metro Rings With Flexible Grid and Few-Mode Transmission

2017 ◽  
Vol 35 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Cristina Rottondi ◽  
Pierpaolo Boffi ◽  
Paolo Martelli ◽  
Massimo Tornatore
Keyword(s):  
Spectrum Allocation ◽  
Baud Rate ◽  
Modulation Format ◽  
Flexible Grid

A Cross-layer Traffic Grooming Algorithm in Joint Optimization of the IP over Elastic Optical Network

2019 ◽  
Vol 41 (1) ◽  
pp. 73-82
Author(s):  
Jijun Zhao ◽  
Yuehuan Xu ◽  
Danping Ren ◽  
Jinhua Hu
Keyword(s):  
Blocking Probability ◽  
Adaptive Modulation ◽  
Optical Network ◽  
Traffic Grooming ◽  
Spectrum Allocation ◽  
Joint Optimization ◽  
Cross Layer ◽  
Dynamic Traffic ◽  
Elastic Optical Network ◽  
Dynamic Traffic Grooming

Abstract To fully utilize the existing optical network resource, the dynamic traffic grooming technology, which could efficiently multiplex many low-speed services arriving dynamically onto high-capacity optical channels, has been studied extensively and used widely. In this article, the problem of dynamic traffic grooming in joint optimization of IP over elastic optical network (EON) is studied. This problem consists of three sub-problems at two layers: the routing problem at the IP-layer (IPR), the routing, modulation level (RML), and the spectrum allocation (SA) problems at the optical layers. We proposed a novel topology-integration and adaptive-modulation based in cross-layer routing spectrum allocation (CL-RSA) algorithm, which follows a multi-cost approach that solves the IPR, the RML, and the SA problems jointly. The most important features of the proposed algorithm are merging physical topology with virtual topology and using the minimum-weight preferred method for route selection. Meanwhile, the effect of physical-layer impairments (PLI) on signal transmission is considered. In addition, the adaptive modulation scheme is used to allocate the spectrum resource. The simulation results show that the algorithm can effectively improve the spectrum resource utilization and reduce the network blocking probability compared to other algorithms in various network conditions, especially in the high load condition effectively.

Virtual Optical Network Provisioning over Flexible-Grid Multi-Domain Optical Networks

2014 ◽  
Author(s):  
Sangjin Hong ◽  
Jason P. Jue ◽  
Qiong Zhang ◽  
Xi Wang ◽  
Hakki C. Cankaya ◽  
...  
Keyword(s):  
Optical Networks ◽  
Optical Network ◽  
Network Provisioning ◽  
Flexible Grid
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