Load Adaptive and Fault Tolerant Framework for Energy Saving in Fiber–Wireless Access Networks

Barradas, Alvaro L.; Correia, N.; Coimbra, J.; Schütz, G.

doi:10.1364/jocn.5.000957

Cited by 18 publications

(18 citation statements)

References 10 publications

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“…That is, wireless routers are not mobile, as they are part of the access network structure and, therefore, can receive power from the electrical network. Any radio frequency technology can be used at this front-end section, e.g., 802.11 or WiMAX, and single or multiple radios per node can be used [9,10]. The use of multiradio and multichannel communication at the wireless mesh front end is now considered a very attractive way of improving network throughput and availability because wireless devices became inexpensive.…”

Section: A Fiwi Architecture and Energy Saving Potentialmentioning

confidence: 99%

“…Because of the just-described characteristics of FiWi networks, long sleep states at some ONUs can be used to reduce energy waste as long as a good alternative route toward an awake ONU exists [9]. That is, there should be a way to reroute traffic toward an active ONU, using a not too long alternative route, or otherwise the energy waste at the wireless section will surpass the energy saved at the ONUs.…”

Section: A Fiwi Architecture and Energy Saving Potentialmentioning

confidence: 99%

“…While in sleep mode, the ONU periodically changes from sleep to active states to prevent missing any traffic. The performance of this sleep scheme depends on the intermittence of sleep periods [9]. This paper proposes a way to increase the performance of fast/cyclic sleep mode, while ensuring QoS, by promoting long-standing sleep periods at ONUs whenever low traffic activity is detected at the network.…”

Section: A Fiwi Architecture and Energy Saving Potentialmentioning

confidence: 99%

See 2 more Smart Citations

Correlation-Based Energy Saving Approach for Smart Fiber Wireless Networks

Correia

Schütz

Barradas

2015

J. Opt. Commun. Netw.

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Energy saving is an important issue that should be taken into consideration when planning telecommunication networks. In fiber-wireless access networks the potential for energy consumption reduction is higher, when compared to other architectures, as many routes toward the optical section are available for nodes at the wireless section, allowing some optical network units (ONUs) to enter long sleep state. However, in a multiradio and multichannel wireless front end, some nodes might not be able to reach all the ONUs. Thus, integrated energy saving mechanisms should be smart and allow for ONU mode adjustments according to wireless node reachability and traffic distribution across the wireless section. In this paper we propose a correlation-aware approach that allows the optical line terminal to infer which ONUs are reachable by wireless nodes. Then, when the network is under low traffic conditions, the appropriate set of ONUs to enter long sleep can be selected. This approach is able, therefore, to integrate knowledge of a wireless front end to promote long-standing sleep periods at the ONUs while avoiding heavy exchange of network state information.

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Section: A Fiwi Architecture and Energy Saving Potentialmentioning

confidence: 99%

Section: A Fiwi Architecture and Energy Saving Potentialmentioning

confidence: 99%

Section: A Fiwi Architecture and Energy Saving Potentialmentioning

confidence: 99%

See 1 more Smart Citation

Correlation-Based Energy Saving Approach for Smart Fiber Wireless Networks

Correia

Schütz

Barradas

2015

J. Opt. Commun. Netw.

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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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