Analysis of Mean Packet Delay for Dynamic Bandwidth Allocation Algorithms in EPONs

Bharati, Sailesh; Saengudomlert, Poompat

doi:10.1109/jlt.2010.2089971

Cited by 32 publications

(33 citation statements)

References 14 publications

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“…Many scheduling disciplines have been considered for upstream DBA design in PONs. Most famously, IPACT with gated service has been taken as the mainstream scheduling discipline for most DBAs in TDMA-PONs [15], [17], [19], [21]. Therefore to find E{N i } and E{Y i }, we proceed with the analysis given that a gated service is employed.…”

Section: Queuing Delay Analysismentioning

confidence: 99%

“…Our focus on gated service is motivated by its smallest packet delays among various scheduling disciplines, particularly at high network loads [16], which is a desired feature for mission-critical services and virtual private networks (VPNs) [22]. However, we note that the gated service may not achieve fairness among ONUs; thus if the latter is set as a salient network requirement, other scheduling disciplines should instead be analyzed (e.g., limited service [17]). …”

Section: Queuing Delay Analysismentioning

confidence: 99%

“…For more details on the delay variation under the gated service in PONs, we refer the reader to [17]. There, unlike in our model, multiple ONUs contribute to the vacation time, which causes higher packet delay as the load increases, yet in the order of few milliseconds.…”

Section: That the Sleep Time Barely Varies As The Load Increases (In mentioning

confidence: 99%

“…While M/G/1 with vacations has been thoroughly explored [13], [14], and lately applied to single-class TDMA-PON [15]- [17], to the best of our knowledge, this is the first closed-form sleep time model for multi-class PONs using M/G/1 queue with vacations.…”

mentioning

confidence: 99%

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Energy Efficiency in TDMA-Based Next-Generation Passive Optical Access Networks

Dhaini

Shen

et al. 2014

IEEE/ACM Trans. Networking

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Abstract-Next-generation passive optical network (PON) has been considered in the past few years as a cost-effective broadband access technology. With the ever-increasing power saving concern, energy efficiency has been an important issue in its operations. In this paper, we propose a novel sleep time sizing and scheduling framework for the implementation of green bandwidth allocation (GBA) in TDMA-PONs. The proposed framework leverages the batch-mode transmission feature of GBA to minimize the overhead due to frequent ONU on-off transitions. The optimal sleeping time sequence of each ONU is determined in every cycle without violating the maximum delay requirement. With multiple ONUs possibly accessing the shared media simultaneously, a collision may occur. To address this problem, we propose a new sleep time sizing mechanism, namely Sort-And-Shift (SAS), in which the ONUs are sorted according to their expected transmission start times, and their sleep times are shifted to resolve any possible collision while ensuring maximum energy saving. Results show the effectiveness of the proposed framework and highlight the merits of our solutions.

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Section: Queuing Delay Analysismentioning

confidence: 99%

Section: Queuing Delay Analysismentioning

confidence: 99%

Section: That the Sleep Time Barely Varies As The Load Increases (In mentioning

confidence: 99%

mentioning

confidence: 99%

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Energy Efficiency in TDMA-Based Next-Generation Passive Optical Access Networks

Dhaini

Shen

et al. 2014

IEEE/ACM Trans. Networking

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“…We firstly consider a generic scheduling mechanism by allowing each ONU to wake up and start downstream and upstream transmissions in a round-robin manner, in which a mean packet delay expression is derived with the limited service discipline. To the best of our knowledge, delay analysis based on the limited service discipline has only been reported in [5], strictly for upstream bandwidth allocation due to its complexity. Hence, the novelty of our work is that we consider it for downstream bandwidth allocation, and for ONU sleep time computation.…”

mentioning

confidence: 99%

Downstream-based Scheduling for Energy Conservation in Green EPONs

Chen¹,

Dhaini²,

Ho³

et al. 2012

JCM

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Abstract-Maximizing the optical network unit's (ONU) sleep time is an effective approach for achieving maximum energy conservation in green Ethernet passive optical networks (EPONs). While overlapping downstream and upstream ONU transmissions can maximize the ONU sleep time, it jeopardizes the quality of service (QoS) performance of the network, especially for downstream traffic in case the overlapping is based on the upstream time slot. In this paper, we study the downstream traffic performance in green EPONs under the limited service discipline and the upstream-based overlapped time window. Specifically, we first derive the expected mean packet delay, and then present a closed-form expression of the ONU sleep time, setting identical upstream/downstream transmission cycle times based on a maximum downstream traffic delay requirement. With the proposed system model, we present a novel downstream bandwidth allocation scheme for energy conservation in green EPONs. Simulation results verify the proposed model and highlight the advantages of our scheme over conventional approaches.

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An improved weighted IPACT algorithm of EPONs in smart distribution networks based on the requirements of relay protection

Xiao

Zhang

Yin

2016

Int. Trans. Electr. Energ. Syst.

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SUMMARYBecause of the capacity of satisfying the quality of service requirements of each traffic service in smart distribution networks, Ethernet passive optical network (EPON) technology is one of the primary technologies for establishing communication systems in smart distribution networks. This paper presents an improved weighted interleaved polling with adaptive cycle time (IW-IPACT) algorithm according to the quality of service requirement of different traffic classes, especially the requirement of the new protection and control technique. During a polling cycle, a virtual weighted buffer queue that meets the bandwidth requirements of the EPON was constructed. Thus, strict priority scheduling was used for the expedited forwarding service, and the weighted fair queuing scheduling was applied for the other services. In addition, to evaluate the real-time performance of the IW-IPACT algorithm, the upper bound for the packet delay of each traffic class was derived by using the network calculus method. The evaluation results indicate that the bandwidth utilization of the EPON was improved by using the IW-IPACT algorithm. In addition, the calculus and OPNET simulation results also show that the EPON can meet the real-time requirements of relay protection.

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Analysis of Mean Packet Delay for Dynamic Bandwidth Allocation Algorithms in EPONs

Cited by 32 publications

References 14 publications

Energy Efficiency in TDMA-Based Next-Generation Passive Optical Access Networks

Energy Efficiency in TDMA-Based Next-Generation Passive Optical Access Networks

Downstream-based Scheduling for Energy Conservation in Green EPONs

An improved weighted IPACT algorithm of EPONs in smart distribution networks based on the requirements of relay protection

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