Novel DBA algorithm for energy efficiency in TWDM-PONs

Dixit, Abhishek; Lannoo, Bart; Colle, Didier; Pickavet, Mario; Demeester, Piet

doi:10.1049/cp.2013.1666

Cited by 32 publications

(17 citation statements)

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“…Meanwhile, there are different studies for energyefficient WDM/TDM PON architectures with dynamic bandwidth (DBA) algorithms [18,19].…”

Section: Related Workmentioning

confidence: 99%

“…On the other hand, wavelengths are activated at the OLT while considering sleep mode states of the ONUs in [19].…”

Section: Related Workmentioning

confidence: 99%

“…In summary, the previous works [15][16][17][18][19][20][21][22] mostly focus on the energy savings in the WDM/TDM PON architectures and [22][23][24][25][26][27][28][29][30][31][32] proposes energy efficient studies in the FiWi networks by combining ONU sleep mechanisms with delay control schemes. It will be promising to introduce different CRMs that could enhance reconfigurable and service on demand converged access network with cost effective and energy efficient characteristics.…”

Section: Related Workmentioning

confidence: 99%

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Cost and energy efficient operation of converged, reconfigurable optical wireless networks

Bade

Toycan

Walker

2015

Optical Switching and Networking

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“…Meanwhile, there are different studies for energyefficient WDM/TDM PON architectures with dynamic bandwidth (DBA) algorithms [18,19].…”

Section: Related Workmentioning

confidence: 99%

“…On the other hand, wavelengths are activated at the OLT while considering sleep mode states of the ONUs in [19].…”

Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Cost and energy efficient operation of converged, reconfigurable optical wireless networks

Bade

Toycan

Walker

2015

Optical Switching and Networking

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show abstract

“…The static wavelength assignment, however, is not able to obtain goods of statistical multiplexing. Hence, a periodic load dependent grouping of ONUs on wavelengths has been proposed in [2] to adapt to bursty traffic. The number of wavelengths can also be changed according to the load to procure energy efficiency.…”

Section: Research Overviewmentioning

confidence: 99%

Dynamic bandwidth allocation with optimal wavelength switching in TWDM-PONs

Dixit

Lannoo

Colle

et al. 2013

2013 15th International Conference on Transparent Optical Networks (ICTON)

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Time and wavelength division multiplexed passive optical networks (TWDM-PONs) have been widely considered as one of the next evolutionary steps of optical access networks. A variety of algorithms exists that explore the problem of scheduling and wavelength assignment in TWDM-PONs. These algorithms, however, allow unlimited switching of wavelengths. In reality, wavelength switching increases guard bands due to the tuning and the switching time of components, limiting channel utilization and increasing packet delays. We propose a novel dynamic bandwidth allocation (DBA) algorithm for TWDM-PON that minimizes the performance degradation due to excessive wavelength switching.Keywords: Dynamic Bandwidth Allocation, Passive Optical Networks, and TDMA/WDMA PON. INTRODUCTIONThe continuous growth of bandwidth intensive applications like high-definition internet video, file sharing and video conferencing requires a concurrent growth in bandwidth capacities, which can be achieved by bringing an optical fibre closer to an end user, leading to the fibre-to-the-home (FTTH) technology. A promising and widely adopted FTTH technology is a passive optical network (PON). The PON has a tree topology and consists of an optical line terminal (OLT) in a central office, passive splitters/combiners in a remote node (RN) and a number of optical network units (ONU) at a user side. The PON technology can be implemented in a variety of ways, and time and wavelength division multiplexed PON (TWDM-PON) has been adopted by FSAN as the primary candidate of the next generation PON solution. TWDM-PON combines the expansion in capacity deposited by WDM with the inherent resource granularity of a TDM PON. TWDM-PON requires a dynamic bandwidth allocation (DBA) algorithm that dynamically assigns wavelengths and time slots to the ONUs. These DBAs are also known as upstream scheduling and wavelength assignment (USWA) algorithms.TWDM-PON is realized with a tuneable laser in each ONU. There exist several types of tuneable lasers: the slowest can switch between wavelengths in times ranging from several seconds to a few microseconds, whereas the fastest can switch in nanoseconds. Unfortunately, fast tuneable lasers are very costly and energy consuming, and thus would not be available for access networks. Thus, most often the ONUs will be equipped with lasers having long tuning times (at least tens of microseconds) and the DBA algorithms must take into account the performance degradation inherent to the long tuning and switching times. In addition, completely static allocation of wavelengths is also inefficient. This entails designing a DBA algorithm that switches wavelengths optimally in accord with the laser tuning times.Current state-of-the-art DBA algorithms, like earliest finish last transmission time (EFT), do not take into account the tuning and the switching time of lasers (and receivers), leading to a very high wavelength switching at ONUs. A very high switching leads to a high switching latency, which degrades the DBA performance. From exte...

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“…An energy consumption of an access network is 80% of the energy consumed in the Internet [2]. To save energy of XG-PONs, an ONU with a sleep mode was proposed in [3].…”

Section: Introductionmentioning

confidence: 99%

Pipelined architecture of dynamic bandwidth allocation for energy efficiency in XG-PON

Han¹

2014

ces

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This paper proposes a pipelined architecture for a dynamic bandwidth allocation (DBA) in 10-gigabit-capable passive optical networks (XG-PONs). In the proposed architecture, the DBA operation is performed in multiple stages for high energy efficiency. Also, the proposed architecture forwards requests to next stages to obtain high performance. Using simulations, we evaluate performance of the proposed architecture.

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Novel DBA algorithm for energy efficiency in TWDM-PONs

Abstract: Time and wavelength division multiplexed passive optical networks (TWDM-PONs) have been widely accepted as a next generation optical access (NGOA) solution. We propose a novel dynamic bandwidth allocation (DBA) algorithm for energy efficiency in TWDM-PONs.

Cited by 32 publications

References 1 publication

Cost and energy efficient operation of converged, reconfigurable optical wireless networks

Cost and energy efficient operation of converged, reconfigurable optical wireless networks

Dynamic bandwidth allocation with optimal wavelength switching in TWDM-PONs

Pipelined architecture of dynamic bandwidth allocation for energy efficiency in XG-PON

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