Design for Energy-Efficient IP Over WDM Networks With Joint Lightpath Bypass and Router-Card Sleeping Strategies

Lui, Yunlei; Shen, Gangxiang; Shao, Weidong

doi:10.1364/jocn.5.001122

Cited by 26 publications

(7 citation statements)

References 14 publications

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“…Reference [3] presented a strategy to save energy consumption when traffic varies. Reference [4] employed lightpath bypass and router-card sleep modes to minimize energy consumption under daily traffic fluctuation.…”

Section: B Related Workmentioning

confidence: 99%

“…In optical networks, service latency mainly consists of propagation latency (0.005 ms/km) on optical layer, and nodal processing latency in packet routers on electrical layer for packet queuing, traffic grooming, signal multiplexing/demultiplexing at the end of lightpaths. Under the condition of optical-layer route unchanged, the number of traversed lightpaths (hops on electrical layer) is the decisive variable for request latency degradation 4. Note that a lightpath l can also be expressed as (i, j), where i and j denote source and destination, respectively, of the baseline lightpath.…”

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confidence: 99%

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Provisioning Short-Term Traffic Fluctuations in Elastic Optical Networks

Zhong

Hua

Tornatore

et al. 2019

IEEE/ACM Trans. Networking

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Transient traffic spikes are becoming a crucial 1 challenge for network operators from both user-experience 2 and network-maintenance perspectives. Different from long-term 3 traffic growth, the bursty nature of short-term traffic fluctu-4 ations makes it difficult to be provisioned effectively. Luckily, 5 next-generation elastic optical networks (EONs) provide an 6 economical way to deal with such short-term traffic fluctuations. 7 In this paper, we go beyond conventional network reconfiguration 8 approaches by proposing the novel lightpath-splitting scheme in 9 EONs. In lightpath splitting, we introduce the concept of Split-10 Points to describe how lightpath splitting is performed. Light-11 paths traversing multiple nodes in the optical layer can be split 12 into shorter ones by SplitPoints to serve more traffic demands 13 by raising signal modulation levels of lightpaths accordingly. 14 We formulate the problem into a mathematical optimization 15 model and linearize it into an integer linear program (ILP). 16 We solve the optimization model on a small network instance 17 and design scalable heuristic algorithms based on greedy and 18 simulated annealing approaches. Numerical results show the 19 tradeoff between throughput gain and negative impacts like 20 traffic interruptions. Especially, by selecting SplitPoints wisely, 21 operators can achieve almost twice as much throughput as 22 conventional schemes without lightpath splitting.

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Section: B Related Workmentioning

confidence: 99%

mentioning

confidence: 99%

Provisioning Short-Term Traffic Fluctuations in Elastic Optical Networks

Zhong

Hua

Tornatore

et al. 2019

IEEE/ACM Trans. Networking

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“…Focusing on variations of traffic over time, sinusoidal functions are usually used as a parametrized model [4,5,[10][11][12][13][14][15][16][17][18][19][20][21][22]. Traffic variation in the context of saving energy is the focus only of [4,5].…”

Section: Related Workmentioning

confidence: 99%

Spatial and Temporal Traffic Variation in Core Networks: Impact on Energy Saving and Devices Lifetime

et al. 2016

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Abstract:We assess the impact of traffic variations on energy consumption and devices lifetime in a core network. Specifically, we first define a model to control the spatial as well as the temporal variations of traffic. We generate different sets of traffic matrices by adopting our model, which are then used as input to an energy-aware algorithm, with the aim of finding the set of Line Cards (LCs) in Sleep Mode (SM) for each traffic matrix. Given this output, we are able to compute different evaluation metrics, including: the total energy consumption, the normalized lifetime as a consequence of activation/deactivation of network devices, and the total network profitability (i.e., the monetary gain/loss for the operator). Our results show that the temporal variation of traffic affects the LCs energy consumption, but has a limited impact on their lifetime. Moreover, the spatial variation of traffic is no obstacle for energy saving. Eventually, the frequency of the power cycles, introduced by the energy-aware algorithm, is particularly important for the lifetime of LCs. Finally, we show that positive total profitability is achieved in most of the considered cases.

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“…Lui et al [18] address energy saving in IP over WDM networks through IP routing bypassing. The authors design an energy-minimized IP over WDM network by combining lightpath bypass and router-card sleeping techniques.…”

Section: Related Workmentioning

confidence: 99%

Using OpenFlow to provide cut-through switching in MobilityFirst

et al. 2014

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Mobile devices are expected to become the Internet's predominant technology. Current protocols such as TCP/IP were not originally designed with mobility as a key consideration, and therefore underperform under challenging mobile and wireless conditions. MobilityFirst, a clean slate architecture proposal, embraces several key concepts centered around secure identifiers that inherently support mobility and trustworthiness as key requirements of the network architecture. This includes a hop-by-hop segmented data transport based on a globally unique identifier. This allows late and dynamic rebinding of end-point addresses to support mobility. While this provides critical gains in wireless segments, some overheads are incurred even in stable segments such as in the core. Bypassing routing-layer decisions in these cases, with lower layer cut-through forwarding, can improve said gains. In this work, we introduce a general bypass capability within the MobilityFirst architecture that provides better performance and enables both individual and aggregate flow-level traffic control. Furthermore, we present An earlier version of this paper was presented at an OpenFlow-based proof-of-concept implementation of the bypass function using layer 2 VLAN tagging. We run experiments on the ORBIT and Global Environment for Network Innovations (GENI) testbeds to evaluate the performance and scalability of the solution. By implementing the bypass functionality, we are able to significantly reduce the number of messages processed by the controller as well as the number of flow rules that need to be pushed into the switches.

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Design for Energy-Efficient IP Over WDM Networks With Joint Lightpath Bypass and Router-Card Sleeping Strategies

Cited by 26 publications

References 14 publications

Provisioning Short-Term Traffic Fluctuations in Elastic Optical Networks

Provisioning Short-Term Traffic Fluctuations in Elastic Optical Networks

Spatial and Temporal Traffic Variation in Core Networks: Impact on Energy Saving and Devices Lifetime

Using OpenFlow to provide cut-through switching in MobilityFirst

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