Power, routing, Modulation Level and Spectrum Assignment in all-optical and elastic networks

Vale, V. A. C.; Almeida, Raul C.

doi:10.1016/j.osn.2018.11.001

Cited by 22 publications

(20 citation statements)

References 21 publications

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“…Bit rate requirement, routes, distance and modulation format are listed in Table 2. The physical layer parameters values of the elastic optical network are illustrated in Table 3, [4], [21], [22], [26], [36], [37]. Herein, we evaluate only twelve channels, including the channels with higher and lower power transmitted power, to avoid burden information.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The PRMSA is an NP-hard problem, which can be decomposed into several sub-problems with lower complexity, e.g. : PA, routing; spectrum assignment; and others [21], [25], [36]. Between them, the PA sub-problem is an important procedure: to combat the main impairments of the EONs, including the amplified spontaneous emission (ASE) and non-linearities interference (NLIs); to guarantee QoT in dynamic scenarios, minimizing the waste of resources during the network's lifetime; to increase the network capacity; to limit the power budged in the sense of maximizing the energy-efficiency (EE); to mitigate the effects caused by fluctuations in the amplifiers.…”

Section: Introductionmentioning

confidence: 99%

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Heuristic Chaotic Hurricane-Aided Efficient Power Assignment for Elastic Optical Network

Santos

Abrão

2020

IEEE Access

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In this paper, we propose a dynamical power allocation (PA) procedure for elastic optical networks (EONs) based on the evolutionary hurricane search optimization (HSO) algorithm with a chaotic logistic map diversification strategy with the purpose of improving the capability to escape from local optima, namely PA-CHSO. The aiming is the dynamical control of the transmitted optical powers according to the variations of each link state due to traffic fluctuations, channel impairments, as well as other channel-power coupling effects. Such realistic EON scenarios are affected mainly by the channel estimation inaccuracy, channel ageing and power fluctuations. The link state is based on the channel estimation and quality of transmission (QoT) parameters obtained from the optical performance monitors (OPMs). Numerical results have demonstrated the effectiveness of the PA-CHSO to dynamically mitigate the power penalty under real measurement conditions with uncertainties and noise, as well as when perturbations in the optical transmit powers are considered. INDEX TERMS Adaptive power control algorithm, optical networks, hurricane algorithm, chaotic map, elastic optical networks.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heuristic Chaotic Hurricane-Aided Efficient Power Assignment for Elastic Optical Network

Santos

Abrão

2020

IEEE Access

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“…Vale and Almeida Jr [25] presented a new RMSA algorithm called Power, Routing, Modulation Level and Spectrum Assignment (PRMLSA) which is considered the physical layer effects on the EON. This work mainly focused on assigning power of each light signal self-sufficiently, Because of Amplified Spontaneous Emission (ASE) noise impairments in the light signals and Non-linearity optical path in a dynamic scenario.…”

Section: Routing Modulation and Spectrum Assignment Algorithm Bmentioning

confidence: 99%

The Recent Contributions of Routing and Spectrum Assignment Algorithms in Elastic Optical Network (EON)

2020

IJITEE

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The speed is an important aspect of the current generation of Internet users. Currently WDM based optical fiber technology provides a good solution, still it is insufficient for future growth of cloud data centers, social media applications, online gaming, high definition video streaming and broadcasting, etc. The Elastic Optical Networks (EONs) recently added an energetic research field in the fiber-optic network. The EON is next generation of network that can provide flexibly in spectrum, improved service provisioning and accommodate high bandwidth applications in the single channel. In WDM, the Routing and Wavelength Assignment (RWA) is problem, likewise the EON has Routing and Spectrum Assignment (RSA) problem. In RSA problem the frequency slots (FSs) should allocate in continuity and contiguous manner for every demand request. Many research articles are published over the years to find the new feasible solutions for the RSA problem. This paper presents the recent approaches based on routing and spectrum assignment problem and fragmentation schemes which examines and compare the performance, features, and complexity of the approaches. This paper provides merits and demerits of existing approaches in RSA problem and provides more information about the approaches it will help for feature research.

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“…Standard approaches to solve the RMLSA problem establish end-to-end all-optical communication (i.e., transparent) between source-destination node pairs [10]- [17]. However, the accumulation of PLI limits the generation of transparent connections in wide-area elastic optical networks.…”

Section: Introductionmentioning

confidence: 99%

BER-Adaptive RMLSA Algorithm for Wide-Area Flexible Optical Networks

et al. 2020

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Wide-area optical networks face significant transmission challenges due to the relentless growth of bandwidth demands experienced nowadays. Network operators must consider the relationship between modulation format and maximum reach for each connection request due to the accumulation of physical layer impairments in optical fiber links, to guarantee a minimum quality of service (QoS) and quality of transmission (QoT) to all connection requests. In this work, we present a BER-adaptive solution to solve the routing, modulation format, and spectrum assignment (RMLSA) problem for wide-area elastic optical networks. Our main goal is to maximize successful connection requests in wide-area networks while choosing modulation formats with the highest efficiency possible. Consequently, our technique uses an adaptive bit-error-rate (BER) threshold to achieve communication with the best QoT in the most efficient manner, using the strictest BER value and the modulation format with the smallest bandwidth possible. Additionally, the proposed algorithm relies on 3R regeneration devices to enable long-distances communications if transparent communication cannot be achieved. We assessed our method through simulations for various network conditions, such as the number of regenerators per node, traffic load per user, and BER threshold values. In a scenario without regenerators, the BER-Adaptive algorithm performs similarly to the most relaxed fixed BER threshold studied in blocking probability. However, it ensures a higher QoT to most of the connection requests. The proposed algorithm thrives with the use of regenerators, showing the best performance among the studied solutions, enabling long-distance communications with a high QoT and low blocking probability.

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Power, routing, Modulation Level and Spectrum Assignment in all-optical and elastic networks

Cited by 22 publications

References 21 publications

Heuristic Chaotic Hurricane-Aided Efficient Power Assignment for Elastic Optical Network

Heuristic Chaotic Hurricane-Aided Efficient Power Assignment for Elastic Optical Network

The Recent Contributions of Routing and Spectrum Assignment Algorithms in Elastic Optical Network (EON)

BER-Adaptive RMLSA Algorithm for Wide-Area Flexible Optical Networks

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