Sleep assistive dynamic bandwidth assignment scheme for passive optical network (PON)

Butt, Rizwan Aslam; Faheem, Muhammad; Ashraf, Muhammad Waqar; Idrus, Sevia Mahdaliza

doi:10.1007/s11107-018-0799-z

Cited by 10 publications

(6 citation statements)

References 33 publications

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“…These results are rational and in correspondence to Fig. 6 of earlier simulation results which were published in [14] and improved as compared to the earlier similar work [11]. These results are due to inactivity period consideration.…”

Section: Performance Evaluation Of the Sbm Modelsupporting

confidence: 92%

“…Additionally, the authors did not consider the inactivity of ONU in AS and SLA states. Though, yield has shown inaccuracy of this model at no traffic load while the maximum sojourn of ONU in AS state is only 35%, which is not rational and contradicted the simulation results which are reported in other CSM studies such as [8], [14], [15].…”

Section: Related Workcontrasting

confidence: 78%

“…Moreover, their state transition probabilities are also inaccurate, and as authors did not consider the ONU inactivity periods. Their results also show the inaccuracy of the model as at no traffic load the maximum sojourn of ONU in AS state is just 35% which is not rational and in contrast to the simulation results reported in other CSM studies such as [8], [14], [15].…”

Section: Introductionmentioning

confidence: 59%

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Sleep Buffer-based Cyclic Sleep / Doze model & framework for ITU Next Generation PONs

Ahmed

Arfeen

Butt

et al. 2022

Preprint

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The power consumption of Next Generation Passive Optical Network (PON) has increased due to the higher number of Optical Network Units (ONU). The International Telecommunication Union (ITU) has provided the options of Cyclic Sleep Mode (CSM) and Cyclic Doze Mode (CDM) schemes for energy conservation. The performance of these low-power modes is critically dependent on traffic arrival rate and traffic threshold on which Local Wakeup Indication (LWI) events are triggered. Therefore, an analytical model of ONU to study different CSM / CDM control schemes is of prime importance. The existing models do not incorporate the sleep buffer which results in limited performance evaluation of the CSM process at low traffic arrival rates and they are unable to possess the CSM / CDM process at higher traffic loads. Therefore, this work improves the existing Discrete-Time Markov Chain (DTMC) based power model by considering a sleep buffer at each ONU to control the local wakeup indication events at the ONU and the Optical Line Terminal (OLT). The proposed model accurately computes the ONU sojourn in each CSM / CDM state, power consumption of ONU, and energy savings as a function of traffic arrival rate. Based on the proposed model a CSM / CDM framework is also added to configure all the parameters efficiently under the given average delay limits.

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Section: Performance Evaluation Of the Sbm Modelsupporting

confidence: 92%

Section: Related Workcontrasting

confidence: 78%

Section: Introductionmentioning

confidence: 59%

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Sleep Buffer-based Cyclic Sleep / Doze model & framework for ITU Next Generation PONs

Ahmed

Arfeen

Butt

et al. 2022

Preprint

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“…The ONU sojourn in AF also decreases at higher traffic loads. These results are very rational and in line with ONU AS state time results presented figure 6 of earlier simulation results published in reference 20. This is because this study used a fixed size AS state buffer approach to delay the ONU sojourn in AS state which accounts for the ONU inactivity during the AS state time.…”

Section: Performance Evaluation Of the Modelsupporting

confidence: 89%

“…Moreover, their state transition probabilities are also not accurate and they did not take into account the inactivity of ONU in AS and SLA states. The results of this study also show the inaccuracy of this model as at no traffic load the maximum sojourn of ONU in AS state is only 35% which is not rational and contrast to the simulation results reported in other CSP studies such as references 12,20,21.…”

Section: Introductioncontrasting

confidence: 93%

Traffic aware cyclic sleep‐based power consumption model for a passive optical network

Butt

Faheem

Anwar

et al. 2022

Int J Numerical Modelling

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For a network, a power consumption model is an important tool to test the performance of a network process for different traffic loads. In a Passive optical network (PON), the optical network unit (ONU) is responsible for the major power consumption of PON. Both IEEE and ITU have standardized a cyclic sleep process (CSP) for ONU energy conservation. In next-generation PON; TWDM and XGS PON, the ONU power contribution has increased further due to higher number of ONUs and ONU being tunable. Therefore, an accurate power consumption model of the CSP process for energy efficiency studies under different traffic conditions is of prime importance. The existing CSP power consumption models do not depict the CSP process accurately especially the inactivity of the ONU in the asleep and sleep aware states are not taken into account which reduce the accuracy of the model. The proposed inactivity aware model (IAM) overcomes these gaps and very accurately models the CSP process, as evident from the results, which are better than earlier model results and quite close to earlier published simulation results. The model is also validated through a simulation-based study and the simulation results are observed to be very close to the model results with only a 5% deviation.

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Sleep-aware wavelength and bandwidth assignment scheme for TWDM PON

et al. 2021

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The energy efficiency and delay performance of PON are two inversely related phenomena. Higher sleep time of the Optical Network Units (ONUs) results in higher upstream (US) delays due to increased traffic queues during the ONU Asleep state. Although an efficient dynamic bandwidth and wavelength assignment (DWBA) scheme can decrease US delays by minimizing the bandwidth waste and improving the fairness of bandwidth distribution among the ONUs. However, the conventional DWBA schemes are not designed to work with cyclic sleep mode (CSM) and they keep on assigning bandwidth to ONUs even if the ONU is in Asleep state leading to wastage of bandwidth and degraded CSM performance. Therefore, in this work a sleep aware DWBA scheme for TWDM PON is presented to coordinate with CSM mode. It only assign bandwidth to Active ONUs during the guaranteed phase, surplus phase and excess phase allocation phases which minimizes the bandwidth waste and the bandwidth lost at the ONU end. The wavelength switching process is also improved by only considering the Active state ONUs to balance the traffic load on all the wavelengths. The simulation results support our claim as the SA-DWBA scheme on average achieves DWBA schemes due to up to 50% to 65% higher energy savings compared to other due to longer ONU Asleep times. However, the increased upstream delays of all the traffic classes in SA-DWBA scheme remain within the set delay limit of 50 ms.

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Sleep assistive dynamic bandwidth assignment scheme for passive optical network (PON)

Cited by 10 publications

References 33 publications

Sleep Buffer-based Cyclic Sleep / Doze model & framework for ITU Next Generation PONs

Sleep Buffer-based Cyclic Sleep / Doze model & framework for ITU Next Generation PONs

Traffic aware cyclic sleep‐based power consumption model for a passive optical network

Sleep-aware wavelength and bandwidth assignment scheme for TWDM PON

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Sleep assistive dynamic bandwidth assignment scheme for passive optical network (PON)

Cited by 10 publications

References 33 publications

Sleep Buffer-based Cyclic Sleep / Doze model &amp; framework for ITU Next Generation PONs

Sleep Buffer-based Cyclic Sleep / Doze model &amp; framework for ITU Next Generation PONs

Traffic aware cyclic sleep‐based power consumption model for a passive optical network

Sleep-aware wavelength and bandwidth assignment scheme for TWDM PON

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Product

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Sleep Buffer-based Cyclic Sleep / Doze model & framework for ITU Next Generation PONs

Sleep Buffer-based Cyclic Sleep / Doze model & framework for ITU Next Generation PONs