Modeling an Optical Network Operating with Hybrid-Switching Paradigms

Bonani, Luiz Henrique

doi:10.1590/2179-10742016v15i4814

Cited by 7 publications

(9 citation statements)

References 28 publications

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“…Note that if the set of equations ( 13) is consistent, the theoretical cumulants are known, and r is sufficiently large so that A r has full column rank, then λ can be estimated error free as the unique solution of (13). We demonstrate in Section V for the NSFnet [24] that r = 3 is sufficient to achieve full column rank, and that the theoretical performance is approachable when the cumulants are estimated from a sufficiently large number of realizations of Y .…”

Section: A Cumulant Matchingmentioning

confidence: 99%

“…In this section we demonstrate the performance of our approach and the gain realized by using higher-order empirical cumulants 2 . We study the NSFnet [24] whose topology is shown in Fig. 1.…”

Section: Numerical Examplementioning

confidence: 99%

“…In Section IV we discuss rate estimation in networks operating under a random routing regime. Numerical results for the NSFnet [24] are presented in Section V. Concluding remarks are given in Section VI. Technical details of the derivations are deferred to the Appendix.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Traffic Rate Network Tomography with Higher-Order Cumulants

Lev-Ari¹,

Ephraim²,

Mark³

2020

Preprint

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Network tomography aims at estimating sourcedestination traffic rates from link traffic measurements. This inverse problem was formulated by Vardi in 1996 for Poisson traffic over networks operating under deterministic as well as random routing regimes. In this paper we expand Vardi's secondorder moment matching rate estimation approach to higher-order cumulant matching with the goal of increasing the column rank of the mapping and consequently improving the rate estimation accuracy. We develop a systematic set of linear cumulant matching equations and express them compactly in terms of the Khatri-Rao product. Both least squares estimation and iterative minimum I-divergence estimation are considered. We develop an upper bound on the mean squared error (MSE) in least squares rate estimation from empirical cumulants. We demonstrate for the NSFnet that supplementing Vardi's approach with thirdorder empirical cumulant reduces its averaged normalized MSE relative to the theoretical minimum of the second-order moment matching approach by about 12% − 18%. This minimum MSE is obtained when Vardi's second-order moment matching approach is based on the theoretical rather than the empirical moments.

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Section: A Cumulant Matchingmentioning

confidence: 99%

Section: Numerical Examplementioning

confidence: 99%

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Traffic Rate Network Tomography with Higher-Order Cumulants

Lev-Ari¹,

Ephraim²,

Mark³

2020

Preprint

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“…The consistent and continuous demand/growth of high-speed internet with a higher volume of data processing prompts the need for high-speed non-blocking optical switches with less sensitivity to polarization and operational wavelength [1]. These functionalities need to accompany with low power consumption, low loss, small device footprint, and a higher number of ports, full operational bandwidth that depends on the number of output ports, and low production cost.…”

Section: Introductionmentioning

confidence: 99%

Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-shifters

Niraula¹,

Rizal

2019

Preprint

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This paper reports design of a 2 × 4 hybrid multimode interferometer-Mach-zehnder interferometer (MMI-MZI) configuration and compact thermo-optical switch consisting of slab waveguides on the silicon-on-insulator (SOI), platform. The device consisted of two identical MMIs as power splitters and couplers that are connected with two identical MMI-based phase shifters, and linear tapers at both ends of the MMIs to minimize the power coupling loss. A thin Al pad is used as a heating element, and a trench is created around this pad to prevent heat from spreading and to minimize loss. The calculated average thermo-optical switching power consumption, excess loss, and power imbalance are 1.4 mW, 0.9 dB, and 0.1 dB, respectively. The overall footprint of the device is 6 × 304 μm2. The new heating method has advantages of compact size, ease of fabrication on SOI platform with the current CMOS technology, and offers low excess loss and power consumption as demanded by devices based on SOI technology. The device can act as two independent optical switches in one structure.

show abstract

“…The consistent and continuous demand/growth of high-speed internet with a higher volume of data processing has prompted the need for high-speed non-blocking optical switches with less sensitivity to polarization and operational wavelength [1]. These functionalities need to accompany with low power consumption, low loss, small device footprint, and a higher number of ports, full operational bandwidth that depends on the number of output ports, and a low production cost.…”

Section: Introductionmentioning

confidence: 99%

Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-Shifters

Niraula¹,

Rizal

2019

Materials

View full text Add to dashboard Cite

This paper reports design of a 2 × 4 hybrid multimode interferometer-Mach-zehnder interferometer (MMI-MZI) configuration consiting of compact thermo-optical switches on the silicon-on-insulator (SOI) platform. The device consists of two identical MMI slab waveguides as power splitters and couplers that are connected with two identical MMI-based phase shifters, and linear tapers at both ends of the MMIs to minimize the power coupling loss. A thin Al pad is used as a heating element and a trench is created around this pad to prevent heat from spreading, and to minimize loss. The calculated average thermo-optical switching power consumption, excess loss, and power imbalance are 1.4 mW, 0.9 dB, and 0.1 dB, respectively. The overall footprint of the device is 6 × 304 μ m 2 . The new heating method has advantages of compact size, ease of fabrication on SOI platform with the current CMOS technology, and offers low excess loss and power consumption as demanded by devices based on SOI technology. The device can act as two independent optical switches in one device.

show abstract

Modeling an Optical Network Operating with Hybrid-Switching Paradigms

Cited by 7 publications

References 28 publications

Traffic Rate Network Tomography with Higher-Order Cumulants

Traffic Rate Network Tomography with Higher-Order Cumulants

Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-shifters

Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-Shifters

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Modeling an Optical Network Operating with Hybrid-Switching Paradigms

Cited by 7 publications

References 28 publications

Traffic Rate Network Tomography with Higher-Order Cumulants

Traffic Rate Network Tomography with Higher-Order Cumulants

Design of a 2 &times; 4 Hybrid MMI-MZI Configuration with MMI Phase-shifters

Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-Shifters

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Product

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Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-shifters