Energy-saving scheme based on downstream packet scheduling in ethernet passive optical networks

Zhang, Lincong; Liu, Yejun; Guo, Lei; Gong, Xiaoxue

doi:10.1016/j.yofte.2012.12.007

Cited by 21 publications

(20 citation statements)

References 24 publications

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“…However, these methods are not sufficiently flexible because the upstream and downstream transmissions do not finish at the same time. Thus, in [5], we presented the independent sleep mode for ONUs, in which the transmitter and receiver of the ONU can sleep independently according to upstream and downstream traffic, respectively. Hosseinabadi and Ansari [18] also considered independent sleep of the transmitter and the receiver by dividing nine states for ONU in different situations.…”

Section: Related Workmentioning

confidence: 99%

“…Because of the differences between unicast and multicast traffic, the sleep processes of ONUs oriented to multicast traffic cannot be handled Journal of Electrical and Computer Engineering 3 by the strategies in [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The authors in [19][20][21] mainly studied the bandwidth allocation problem of multicast traffic in TDM-PON (time division multiplexing-PON), WDM-PON (wavelength division multiplexing-PON), and TDM-WDM-PON, respectively.…”

Section: Related Workmentioning

confidence: 99%

“…Therefore, the irrelevant ONUs stay in a low-power or sleep state to save energy. However, most literature focuses on energy saving oriented to unicast traffic [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. In this work, we propose an energy-saving algorithm for multicast traffic (ESMT) to reduce the energy consumption of EPON ONUs oriented to multicast traffic, while maintaining the traffic delay at an acceptable level.…”

Section: Introductionmentioning

confidence: 99%

“…ONUs in the same group must receive the downstream multicast traffic at the same time; however, the upstream transmissions of these ONUs cannot proceed simultaneously. Therefore, the ONU hybrid sleep mode presented in our previous work [5] is a better way to solve the energy-saving problem in this situation. In other words, the ONU receivers in the same group can sleep simultaneously after the reception; meanwhile, the ONU transmitters can sleep independently, according to their own idle time.…”

Section: Introductionmentioning

confidence: 99%

“…If there is no upstream or downstream traffic, the ONU goes into a deep sleep state. However, due to multicast characteristics, the energy saving of ONUs oriented to multicast traffic in hybrid sleep mode is much more complicated than in [5].…”

Section: Introductionmentioning

confidence: 99%

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A Multicast-Traffic-Oriented Energy-Saving Algorithm with a Hybrid Sleep Mode for EPONs

Zhang

Guo

Liu

et al. 2016

Journal of Electrical and Computer Engineering

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High energy consumption in Ethernet Passive Optical Networks (EPONs) has caused intense research on energy-saving methods in recent years. The most common method for EPON energy saving is to cause optical network units (ONUs) to sleep which are idle or low loaded. With the popularity of multimedia applications, the ONUs carry not only unicast traffic but also more and more multicast traffic. However, existing studies mainly focus on ONUs that support only unicast traffic. The many differences between multicast traffic and unicast traffic make it necessary to design novel energy-saving methods. This paper proposes a multicasttraffic-oriented energy-saving algorithm for EPONs, called the energy-saving algorithm for multicast traffic (ESMT). To save as much energy as possible, the proposed algorithm uses a hybrid sleep mode (composed of a deep sleep state and an independent sleep mode) in which not only can ONU enter a deep sleep state, but also the ONU transmitter and receiver can sleep independently. Simulation results show that the proposed algorithm, which is oriented to multicast traffic in EPONs, is more energy efficient than other algorithms.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Multicast-Traffic-Oriented Energy-Saving Algorithm with a Hybrid Sleep Mode for EPONs

Zhang

Guo

Liu

et al. 2016

Journal of Electrical and Computer Engineering

Self Cite

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QoS-aware energy-efficient mechanism for sleeping mode ONUs in enhanced EPON

et al. 2015

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Ethernet passive optical network (EPON) is a broadband access time-division multiplexing passive optical network technology which can be referred to as green network, as it has less power consumption compared with other networks. The optical network unit (ONU) is the best candidate to implement energy-saving adjustments in EPON. Turning off the ONU transmitter (Tx)/receiver (Rx) for substantial time is a common method to achieve the energy saving. However, setting overlong sleep duration decreases the QoS, while short sleep duration increases the ONU power consumption. The challenging issue is how to balance the trade-off between achieving energy saving and guaranteeing QoS. In this paper, we introduce an enhanced EPON architecture and a QoS-aware energy-saving mechanism to reduce ONU energy consumption and guarantee an overall QoS metric based on the ITU-T standards requirements. To achieve the energy saving in the upstream/downstream direction, two sleep durations are defined for the ONU's Tx/Rx to generate four ONU modes including active, transmission, doze, and sleep. Simulation results show that the proposed scheme B I-Shyan Hwang improves the energy efficiency 44 % in average to fulfill the QoS metrics in terms of packet loss, delay and jitter, and the buffer requirement.

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Integrated coding-aware intra-ONU scheduling for passive optical networks with inter-ONU traffic

Dai

2016

Optics Communications

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Energy-saving scheme based on downstream packet scheduling in ethernet passive optical networks

Cited by 21 publications

References 24 publications

A Multicast-Traffic-Oriented Energy-Saving Algorithm with a Hybrid Sleep Mode for EPONs

A Multicast-Traffic-Oriented Energy-Saving Algorithm with a Hybrid Sleep Mode for EPONs

QoS-aware energy-efficient mechanism for sleeping mode ONUs in enhanced EPON

Integrated coding-aware intra-ONU scheduling for passive optical networks with inter-ONU traffic

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