Design of QoS-Aware Energy-Efficient Fiber–Wireless Access Networks

Schütz, G.; Correia, N.

doi:10.1364/jocn.4.000586

Cited by 28 publications

(20 citation statements)

References 20 publications

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“…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%

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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: Introductionmentioning

confidence: 99%

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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“…These approaches, however, are not suitable for FiWi networks where traffic is forwarded toward the ONUs. FiWi networks have been studied in many aspects [4,13,14]. In [4,13] the focus is on fault-tolerance while [13,14] relate to energy saving.…”

Section: Fiwi Network Architecturementioning

confidence: 99%

“…FiWi networks have been studied in many aspects [4,13,14]. In [4,13] the focus is on fault-tolerance while [13,14] relate to energy saving. Although these studies incorporate frequency assignment decisions in them, the approaches are faulttolerance and energy saving oriented.…”

Section: Fiwi Network Architecturementioning

confidence: 99%

Frequency assignment in multi-channel and multi-radio FiWi access networks

Sabino

Correia

Barradas

2014

2014 9th Iberian Conference on Information Systems and Technologies (CISTI)

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FiWi architectures have been proposed as cost effective solutions to provide high bandwidth and ubiquity at access network areas. In multi-radio and multi-channel scenarios an effective frequency assignment must be done to radios so that higher throughput and low delay can be obtained and the best of such architectures is achieved. Here we propose an approach for frequency assignment in multi-radio and multi-channel FiWi access networks. A simulation model is built to evaluate the effectiveness of our approach. Results show that our scheme is able to increase throughput and reduce delay, when compared with a fixed assignment strategy, by carefully planning frequency assignments which makes it possible to increase network parallel transmissions (reduce time division).

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“…Some works have been carried out to investigate the issue of energy savings in the FiWi network [6][7][8]. Most of these works aim to reduce the energy consumption of the optical back-end by extending the ONU sleep mechanisms in PON to FiWi and combining with the wireless rerouting.…”

Section: Introductionmentioning

confidence: 99%

Energy-efficient topology reconfiguration in green Fiber-Wireless (FiWi) access network

Liu

Guo

Yang

2013

2013 22nd Wireless and Optical Communication Conference

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As a promising access technique, Fiber-Wireless (FiWi) network not only enables the cost-effective broadband access, but also provides more opportunities for energy savings. Previous works mostly focused on energy savings in the optical back-end of FiWi. Generally, they extend the Optical Network Unit (ONU) sleep mechanisms initially designed for Passive Optical Network (PON) to FiWi by combining with the wireless rerouting. Most of these works, however, remain untouched energy savings in the wireless front-end. In fact, when one or more ONUs in the network is/are sleeping, many wireless components remain idle or underutilized which cause a lot of energy waste. In this paper, we propose a new energy-efficient Wireless-Optical Topology Reconfiguration (WOTR) scheme for the integrated energy savings in FiWi. Aiming to reduce energy consumption over the whole network, WOTR reconfigures the optical topology by using ONU sleep as well as the wireless topology by using Radio Interface (RI) standby. By means of topology reconfiguration, the network components will be utilized more efficiently, thus saving more energy. Simulation results show that WOTR can reduce the energy consumption significantly with just a little performance degradation in network throughput.

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Design of QoS-Aware Energy-Efficient Fiber–Wireless Access Networks

Cited by 28 publications

References 20 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

Frequency assignment in multi-channel and multi-radio FiWi access networks

Energy-efficient topology reconfiguration in green Fiber-Wireless (FiWi) access network

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