Dynamic-load-balancing algorithm suppressing the number of wavelength reallocations for &amp;#x03BB;-tunable WDM/TDM-PON

Senoo, Yasutoshi; Kaneko, Shigeo; Yoshida, Tomoaki; Sugawa, Jun; Odaka, Toshiyuki; Kimura, Shunji; Yoshimoto, Naoto; Kimura, Hirokazu

doi:10.1109/ecoc.2014.6963963

Cited by 15 publications

(6 citation statements)

References 2 publications

(4 reference statements)

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“…Advanced power savings is a function that reduces the number of working OLT ports when there is low traffic volume [12]. Dynamic load balancing is a function that transfers some of the traffic load from heavily loaded OLT ports to less burdened OLT ports [8], [13], [14]. For each function, ONUs connect to a new OLT port by performing λ-tuning according to the λ-tuning directions from the OLT port to which ONUs are originally assigned [15].…”

Section: Issues Facing λ-Tuning Olt Protectionmentioning

confidence: 99%

Reliable λ-Tuning OLT-Protection Method Based on Backup-Wavelength Pre-assignment and Discovery Process for Resilient WDM/TDM-PONs

Kaneko

Yoshida

Kimura

et al. 2015

J. Lightwave Technol.

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This paper proposes a novel wavelength-tuning (λ-tuning) optical line terminal (OLT) protection method for wavelength division multiplexing/time division multiplexing-passive optical networks (WDM/TDM-PONs). Since λ-tuning OLT protection achieves redundancy of OLT ports utilizing only the λ-tunability of optical network units (ONUs) that ONUs intrinsically have for colorless operation, no additional equipment such as redundant OLT ports or optical switches is necessary for the protection. The proposed method is based on backup wavelength pre-assignment and a discovery process. Since the backup wavelengths are pre-assigned, the proposed method shortens the service outage time and balances traffic loads among the active OLT ports after OLT protection. Therefore, the proposed method achieves high-level reliability cost-effectively. Through system demonstrations using media access control boards and λ-selective burst-mode transceivers for symmetric 40-Gb/s WDM/TDM-PONs, the validity of the proposal is examined based on the link-up time and throughput measurement for λ-tuning OLT-protection.Index Terms-Optical access network, optical access system, passive optical network (PON), passive optical network (PON) protection, wavelength division multiplexing/time division multiplexing-passive optical network (WDM/TDM-PON).

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Section: Issues Facing λ-Tuning Olt Protectionmentioning

confidence: 99%

Reliable λ-Tuning OLT-Protection Method Based on Backup-Wavelength Pre-assignment and Discovery Process for Resilient WDM/TDM-PONs

Kaneko

Yoshida

Kimura

et al. 2015

J. Lightwave Technol.

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“…The very first hitless wavelength tuning scheme experiment was presented in [6] with an OLT and two ONUs. DWBA in [7] distributes the traffic to each wavelength fairly and suffers less from both wavelength reallocations and the tuning time drawbacks with a high messaging overhead. The studies in [8], [9] experimentally verified such a scheme and reduced the messaging overhead between OLT-ONU for the wavelength switching by delaying the ONU relocation until traffic load exceeds a pre-defined threshold.…”

Section: Ieee Photonics Journalmentioning

confidence: 99%

Traffic-Adaptive Inter Wavelength Load Balancing for TWDM PON

et al. 2020

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This study presents a dynamic inter wavelength migration scheme for the optical network units (ONUs) employing linear regression machine learning method to equalize the traffic volume on all the wavelengths in time and wavelength division multiplexed passive optical network (TWDM PON). The proposed traffic-adaptive wavelength and bandwidth assignment (TA-WBA) scheme not only decreases upstream traffic delays but also offers 2.3% and 30% less delay on the wavelengths balancing the excessive load and 7% less upstream bandwidth waste, when evaluated against other load-balancing scheme.

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“…Only recently, attention has been focused on DWBAs reducing penalties due to tuning time overhead. For example in [6], a DWBA is proposed that minimizes the number of wavelength reallocations and, as of consequence, the tuning time overhead penalties while attaining fairness in distributing traffic to OSUs. Such DWBA is experimentally demonstrated with 512 ONUs in [7].…”

Section: Introductionmentioning

confidence: 99%

Balancing the Impact of ONU Tuning Overhead in Reconfigurable TWDM-PONs: An FPGA-Based Evaluation

Kondepu

Valcarenghi

Castoldi

2014

2015 IEEE Global Communications Conference (GLOBECOM)

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In TWDM-PON, the utilization of tunable transceivers at the ONUs allows to dynamically reconfigure the OSU-ONU pairings to decrease, for example, the energy consumption at the OLT. However, if the utilized dynamic wavelength and bandwidth allocation (DWBA) does not take into account which ONUs are reallocated, the ONU tuning overhead can severely impact the average frame delay experienced by the tuning ONUs. The paper shows that, by alternating the ONUs that tune at each reconfiguration, the impact of ONU tuning overhead on average frame delay is fairly distributed among the ONUs.

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Dynamic-load-balancing algorithm suppressing the number of wavelength reallocations for λ-tunable WDM/TDM-PON

Cited by 15 publications

References 2 publications

Reliable λ-Tuning OLT-Protection Method Based on Backup-Wavelength Pre-assignment and Discovery Process for Resilient WDM/TDM-PONs

Reliable λ-Tuning OLT-Protection Method Based on Backup-Wavelength Pre-assignment and Discovery Process for Resilient WDM/TDM-PONs

Traffic-Adaptive Inter Wavelength Load Balancing for TWDM PON

Balancing the Impact of ONU Tuning Overhead in Reconfigurable TWDM-PONs: An FPGA-Based Evaluation

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