Modified Smallest Available Report First: New Dynamic Bandwidth Allocation schemes in QoS-capable EPONs

Dolama, Mustafa Vahabzadeh; Rahbar, Akbar Ghaffarpour

doi:10.1016/j.yofte.2010.09.002

Cited by 20 publications

(5 citation statements)

References 16 publications

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“…The offline framework for IPACT 23 has also been explored in many studies. [24][25][26][27] A scheme following this framework requires an OLT to wait for all the queue reports from all the ONUs before it executes the DBA algorithm. Thus, the OLT can fairly allocate bandwidth to all the ONUs.…”

Section: Related Workmentioning

confidence: 99%

Comprehensive bandwidth utilization and polling mechanism for XGPON

Butt

Idrus²,

Zulkifli³

et al. 2017

Int J Communication

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For an efficient utilization of the upstream bandwidth in passive optical network, a dynamic bandwidth assignment mechanism is necessary as it helps the service providers in provisioning of bandwidth to users according to the service level agreements. The scheduling mechanism of existing schemes, immediate allocation with colorless grant and efficient bandwidth utilization (EBU), does not assign the surplus bandwidth to a specific traffic class and only divides it equally among the optical network units (ONUs). This results in overreporting of ONU bandwidth demand to the optical line terminal and causes wastage of bandwidth and increase in delays at high traffic loads. Moreover, the EBU also assigns the unused bandwidth of lightly loaded ONU queues to the overloaded queues through an Update operation. This Update operation has a flaw that it borrows the extra bandwidth to a queue in the current service interval, if the queue report is higher than its service level agreement and refunds in next service interval. This borrow-refund operation causes reduced bandwidth allocation to the lower priority classes and increases their delay and frame loss. This study improves both these weaknesses. The simulation results show that the proposed scheme uses bandwidth efficiently and reduces mean upstream delay of type-2 (T2) traffic class by 38% and type-3 (T3) up to 150% compared to immediate allocation with colorless grant at a cost of up to 10% higher delay for T2. However, T4 performance improves by 400% compared to EBU with slight increase in delay for T2 traffic class. Overall, it shows a balanced performance for all the traffic classes and minimizes the bandwidth waste per cycle as well as the frame loss rate.

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Section: Related Workmentioning

confidence: 99%

Comprehensive bandwidth utilization and polling mechanism for XGPON

Butt

Idrus²,

Zulkifli³

et al. 2017

Int J Communication

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show abstract

“…The typical traffic mixture ratio of EF, AF, and BE classes is (20%, 40%, 40%) [7]. However, since the Ethernet traffic is bursty, the proportion of the UDBA traffic profile is varied to the other three different traffic mixtures in order to simulate their effects.…”

Section: Simulation Studymentioning

confidence: 99%

“…A current method of avoiding collision is by using dynamic bandwidth allocation (DBA) algorithm. Up to date, a number of DBA algorithms have been proposed in the literature [2][3][4][5][6][7][8][9][10][11][12]. In general, we can divide the algorithms into two parts: DBAs that use one logical link identifier (LLID) per ONU and DBAs that use multiple LLIDs per ONU.…”

Section: Introductionmentioning

confidence: 99%

“…With FPS, packets are sent according to the standard strict priority scheduling, whereas IPS is proposed where it eliminates the light load punishment by using the two-stage buffer explained by Kramer et al [5]. Besides that, algorithms in [6,7] are proposed by combining excessive bandwidth mechanism with a strict priority scheduling in intra-ONU.…”

Section: Introductionmentioning

confidence: 99%

“…In modified smallest available report first (MSARF) [7], ONUs are sorted in an ascending order according to their bandwidth demands. The smallest ONUs are served first.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Implementation of a One-LLID-per-Queue DBA Algorithm in EPON

Radzi

Din

Al-Mansoori

et al. 2014

Advances in Optical Technologies

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The advantages of Ethernet passive optical network (EPON) are setting it to be a natural ubiquitous solution for the access network. In the upstream direction of EPON, the directional property of the splitter requires that the traffic flow be mitigated to avoid collision. A dynamic bandwidth allocation (DBA) scheme is desirable in optimizing the bandwidth usage further. In this paper, a global priority DBA mechanism is discussed. The mechanism aims to reduce the overall delay while enhancing the throughput and fairness. This study was conducted using MATLAB where it was compared to two other algorithms in the literature. The results show that the delay is reduced up to 59% and the throughput and fairness index are improved up to 10% and 6%, respectively.

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Bandwidth Forecasting for Power Communication Using Adaptive Extreme Learning Machine

Zhang

Wang³

et al. 2016

Cloud Computing and Security

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Modified Smallest Available Report First: New Dynamic Bandwidth Allocation schemes in QoS-capable EPONs

Cited by 20 publications

References 16 publications

Comprehensive bandwidth utilization and polling mechanism for XGPON

Comprehensive bandwidth utilization and polling mechanism for XGPON

Implementation of a One-LLID-per-Queue DBA Algorithm in EPON

Bandwidth Forecasting for Power Communication Using Adaptive Extreme Learning Machine

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