Dynamic bandwidth allocation EPON survey

Radzi, Nurul Asyikin Mohamed; Din, Norashidah Md; Sadon, Sajaa Kh.; Al-Mansoori, M. H.

doi:10.1109/scored.2013.7002561

Cited by 5 publications

(4 citation statements)

References 29 publications

(37 reference statements)

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“…The sum of these unused bandwidths in lowly utilized ONTs is called excessive bandwidth which we can further use among other ONTs. This is an important mile in moving forward toward the effective utilization in passive optical network to achieve better performance and provide better services for end-users [1], [12][13][14][15][16].…”

Section: Bandwidth Allocation Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Approach of the T-CONT Allocation to Increase the Bandwidth in Passive Optical Networks

Bosternák¹,

Róka²

2017

RADIOENGINEERING

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Section: Bandwidth Allocation Methodsmentioning

confidence: 99%

“…Between OLT and each ONT there are different values of round trip time RTT. This is the time that takes for the optical signal to be sent with an additional time of acknowledgment what is basically some kind of confirmation that the signal was successfully received [1], [2], [13], [14], [16].…”

Section: Introductionmentioning

confidence: 99%

Approach of the T-CONT Allocation to Increase the Bandwidth in Passive Optical Networks

Bosternák¹,

Róka²

2017

RADIOENGINEERING

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“…In addition, a DBWA scheme is needed to arbitrate upstream transmissions to avoid collisions and effectively use flexible sharing in WA-PON. However, most existing DBWA schemes, which are designed for other PON architectures [20][21][22][23][24], are not suitable for WA-PON. In fact, existing DBWA schemes consider how to grant bandwidth on only a fixed number of assigned wavelengths for each ONU, while in WA-PON a flexible number of upstream wavelengths can be assigned to an ONU.…”

Section: Wa-ponmentioning

confidence: 99%

Dynamic Bandwidth and Wavelength Allocation Scheme for Next-Generation Wavelength-Agile EPON

Wang¹,

Wang²,

Tornatore³

et al. 2017

J. Opt. Commun. Netw.

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Recently, the IEEE 802.3 Ethernet Working Group has classified three architectures for the nextgeneration Ethernet passive optical network (NG-EPON). They are called single-scheduling domain (SSD) PON, multi-scheduling domain (MSD) PON, and wavelength-agile (WA) PON, and they differ based on how a group of optical network units (ONUs) share a wavelength. Existing dynamic bandwidth and wavelength allocation (DBWA) schemes for conventional EPON can be applied to MSD-PON and SSD-PON, but not WA-PON. This is because WA-PON is a new architecture with full flexibility where a flexible number of wavelengths can be assigned to one ONU, and multiple ONUs can transmit at the same time. In this work, we develop a mathematical model and a novel DBWA scheme for transmission scheduling in WA-PON. However, as WA-PON incurs penalties in terms of delay and power consumption when an ONU activates its transmissions on new wavelengths, a trade-off between energy saving and data-transfer latency reduction needs to be carefully addressed when performing transmission scheduling. So, we develop a power-consumption model and modify the proposed DBWA scheme to enhance the energy efficiency of WA-PON. Finally, we conduct simulation experiments for performance evaluation of the three PON architectures in terms of latency and packet loss ratio. We quantitatively investigate the influence of various parameters, such as the number of ONU transceivers and ONU buffer size, on WA-PON latency and packet loss ratio, and we evaluate the energy efficiency gain of the modified DBWA scheme.

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“…Also, a DBA scheme is needed to arbitrate upstream transmissions to avoid collisions and effectively use the flexible sharing in WA-PON. But most existing DBA schemes, which are designed for other PON architectures [9]- [11], are not suitable for WA-PON. In fact, existing DBA schemes only consider how to grant bandwidth on a fixed number of assigned wavelengths for each ONU, while in WA-PON a flexible number of upstream wavelength channels can be assigned to an ONU.…”

Section: Wa-ponmentioning

confidence: 99%

On the performance of Hybrid-PON scheduling strategies for NG-EPON

Wang

Mukherjee

et al. 2016

2016 International Conference on Optical Network Design and Modeling (ONDM)

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To effectively schedule transmissions in NG-EPON, Hybrid-PON is further classified into MSD-PON, SSD-PON, and WA-PON depending on their different access architectures, viz. how a group of ONUs share the assigned wavelength channels. The architectures for these three Hybrid-PONs were introduced by the IEEE 802.3 Ethernet Working Group in 2015. In this study, we first propose to apply some existing dynamic bandwidth allocation (DBA) schemes in the cases of MSD-PON and SSD-PON. Then, since WA-PON is a new hybrid multiplexing architecture and previous DBA schemes cannot exploit its flexibility of wavelength assignment and sharing, we develop the optimization model and also provide a novel DBA scheme for WA-PON. Then, we compare the performance of these hybrid PONs by simulation in terms of average delay and packet drop ratio. We analyze the influence of increasing buffer size for each ONU in WA-PON and show how the flexibility of WA-PON can impact the performance. We find that WA-PON can reduce the drop ratio compared with SSD-PON at low offered load, and has smaller average delay than MSD-PON, which suggest that WA-PON can tolerate heavier traffic and performs the best among three Hybrid-PON architectures.

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Dynamic bandwidth allocation EPON survey

Cited by 5 publications

References 29 publications

Approach of the T-CONT Allocation to Increase the Bandwidth in Passive Optical Networks

Approach of the T-CONT Allocation to Increase the Bandwidth in Passive Optical Networks

Dynamic Bandwidth and Wavelength Allocation Scheme for Next-Generation Wavelength-Agile EPON

On the performance of Hybrid-PON scheduling strategies for NG-EPON

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