Comparison of Spectral and Spatial Super-Channel Allocation Schemes for SDM Networks

Khodashenas, Pouria Sayyad; Rivas-Moscoso, Jose Manuel; Siracusa, Domenico; Pederzolli, Federico; Shariati, Behnam; Klonidis, Dimitrios; Salvadori, Elio; Tomkos, Ioannis

doi:10.1109/jlt.2016.2551299

Cited by 143 publications

(95 citation statements)

References 29 publications

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“…Then, the input of the second stage switch, which (x1, x2) is connected to, can be derived from Equations (2), (4), (5), and (7), as follows: (2) and Equation (5). )…”

Section: A New Decomposition Schemementioning

confidence: 99%

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Construction of Nonblocking Wavelength/Space Switches with AWGs and WSSes

Lin

Lea

2017

Applied Sciences

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Abstract:In this paper, we how to use two technologies, AWG (arrayed-waveguide grating) and WSS (wavelength selective switches), to design nonblocking wavelength/space optical cross connects. An AWG is a passive device and can route multiple wavelengths simultaneously. However, to apply AWGs, there are several issues to consider, including the wavelength conversion range, crosstalk, and switch size constraint. We show a decomposition technique for designing an AWG-based nonblocking wavelength/space switch. The decomposition is carried out in a transformed space network. The new technique is simpler in concept and more flexible in setting switch sizes. We also study another class of wavelength/space switches that are based on WSSes and compare the two approaches in terms of the scalability, switch size constraint, and number of WCs (wavelength converters) required.

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“…Then, the input of the second stage switch, which (x1, x2) is connected to, can be derived from Equations (2), (4), (5), and (7), as follows: (2) and Equation (5). )…”

Section: A New Decomposition Schemementioning

confidence: 99%

“…In addition to AWG, WSS [4,5,[20][21][22] is another commercially available technology for constructing nonblocking space/wavelength switches. We will present a different decomposition technique for designing WSS-based nonblocking optical cross-connects.…”

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confidence: 99%

Construction of Nonblocking Wavelength/Space Switches with AWGs and WSSes

Lin

Lea

2017

Applied Sciences

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“…The problem is, however, significantly more complex than we first assumed in [5]. In fact, the characteristics of the demands placed on the network play a major role in determining the performance of the various switching paradigms.…”

Section: Introductionmentioning

confidence: 97%

“…In a previous work [5], we showed how many WSSs can be saved by adopting JoS and FJoS in a production network, and analyzed the respective performance of these solutions. We found that these two switching paradigms may lead to a significant increase in the blocking probability of the network, leading to a reduced network throughput with respect to the independent switching (InS) solution, at least when a large number of relatively small connections is considered.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, which expands on [7], we try to address the performance degradation detected in [5] by proposing two novel routing, space, and spectrum allocation (RSSA) heuristic algorithms for instantiating spatial super-channels (i.e., super-channels where multiple sub-channels are placed in different spatial dimensions at the same frequency [8]) in (F)JoS SDM networks employing bundles of single-mode, single-core fibers; these algorithms improve the performance of our past results from [5] by sharing co-routed spatial groups. This is done by exploiting two tweaked reconfigurable optical add/drop multiplexer (ROADM) architectures, whose slightly higher cost is offset by the significantly higher throughput achievable by the combined solutions.…”

Section: Introductionmentioning

confidence: 99%

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Improving Performance of Spatially Joint-Switched Space Division Multiplexing Optical Networks via Spatial Group Sharing

Pederzolli

Siracusa

Shariati

et al. 2017

J. Opt. Commun. Netw.

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Space division multiplexing (SDM) is a promising approach to overcome the looming fiber capacity crunch. Joint and fractional joint switching (JoS and FJoS) architectures, which switch multiple spatial dimensions together as atomic units, have been proposed to reduce the cost of implementing SDM and cater to strongly coupled transmission media. However, they have been shown to impose significant penalties to overall network performance, at least when many relatively small connections are used in the context of uncoupled spatial dimensions, while performing nearly as well as the independent switching (InS) architecture if the average connection size is sufficiently large to efficiently exploit their increased granularity. In this work we tackle the performance penalty that JoS and FJoS architectures impose on SDM networks with uncoupled spatial dimensions compared to InS, by proposing two novel routing, space, and spectrum allocation (RSSA) heuristics that effectively share jointly switched resources, adapted to use different types of SDM reconfigurable optical add/drop multiplexer architectures requiring only a small additional cost. We investigate the performance of these new RSSA algorithms compared to an existing one under several traffic conditions and models using simulations. We find that our proposals can achieve significant improvements in the performance of SDM networks carrying large numbers of relatively small connections, up to parity of performance with InS designs, at a lower implementation cost, under all traffic conditions under study, including different average connection sizes and size diversity.

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2017

Provisioning, Recovery, and In‐operation Planning in Elastic Optical Networks

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Comparison of Spectral and Spatial Super-Channel Allocation Schemes for SDM Networks

Cited by 143 publications

References 29 publications

Construction of Nonblocking Wavelength/Space Switches with AWGs and WSSes

Construction of Nonblocking Wavelength/Space Switches with AWGs and WSSes

Improving Performance of Spatially Joint-Switched Space Division Multiplexing Optical Networks via Spatial Group Sharing

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