Centralized PON Monitoring Scheme Based on Optical Coding

Xu, Zhiyong; Zhang, Fuding; Sun, Xiaohan

doi:10.1109/lpt.2013.2251622

Cited by 31 publications

(15 citation statements)

References 9 publications

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“…The decoded monitoring pulses are converted into electrical signal by the PD, and then go through the integral filter to the threshold comparator, which extracts status information about each fiber link according to the autocorrelation peak [5]. In this paper, we focus on the monitoring system mathematical model and performance analysis, hence the principle and structure description of the encoder and decoder is out of the scope of the paper and can be referenced in our previous paper [3][4]. , ,…”

Section: Icton 2015mentioning

confidence: 99%

“…However, the capacity of this scheme is still limited. In our previous work, we proposed a centralized optical monitoring scheme in a PON based on the 2D optical frequency hopping/periodic coding scheme with the network recognition algorithm that converts the decoding operation into an electronic field [3][4]. After experimentally demonstrated, the results show that the proposed scheme achieves the small correlation distance and the larger capacity than PC scheme.…”

Section: Introductionmentioning

confidence: 99%

“…After experimentally demonstrated, the results show that the proposed scheme achieves the small correlation distance and the larger capacity than PC scheme. The status of the fiber link in PON can be monitored by the implementation of the network recognition algorithm [4].…”

Section: Introductionmentioning

confidence: 99%

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Modelling and analysis of optimal fiber-fault decision for optical 2D-coding monitoring scheme in PONs

Zhu

Zhang

Wang

et al. 2015

2015 17th International Conference on Transparent Optical Networks (ICTON)

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We develop a mathematical model of 2D-coding monitoring scheme in passive optical networks (PONs). We derive the new expression for P D (detection probability) and P FA (false-alarm probability), which are used to find the optimal decision probability. We simulate the effect of the client separation distance, network size, pulse width, and the transmitted power on the performance of 2D-coding monitoring scheme, and the numerical results show that the suitable system variables can be chosen optimally to facilitate optimal decision.

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Section: Icton 2015mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modelling and analysis of optimal fiber-fault decision for optical 2D-coding monitoring scheme in PONs

Zhu

Zhang

Wang

et al. 2015

2015 17th International Conference on Transparent Optical Networks (ICTON)

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“…However, some challenges arise when deploying it in an actual network. For instance, correlation distance (CD) defined as the relative distance between two users after which their coding sequences cannot interfere with each other is poor, which leads to more difficult recognition process and severe multiple-customers interference probability (MCIP) 22 . The MCIP is defined as the probability that the intensity superposition of transmitted signals between multiple users and the desired user at the time slot.…”

Section: Introductionmentioning

confidence: 99%

Optical pulse width modulation based TDM-PON monitoring with asymmetric loop in ONUs

Zhang

Sun

2018

Sci Rep

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We propose a time division multiplexing passive optical network (TDM-PON) monitoring scheme based on the optical pulse width modulation (OPWM) by using a simple asymmetric loop (AL) located near the optical network unit (ONU). Various pulse widths can be easily obtained by configuring the appropriate length of the patchcord used to generate the path difference between two branches of a 1 × 2 splitter. Different wavelengths can be assigned to the same pulse width, which can further increase the network size. The optimized parameters of the AL are investigated and analysis models are established. The calculation results show that the proposed scheme has smaller correlation distance (CD) and lower multiple-customers interference probability (MCIP) than the periodic coding (PC) scheme. A simplified PON system with 8 ONUs is set up to experimentally demonstrate the feasibility of the proposed scheme. The network recognition processing used to identify the reflected monitoring signals in the proposed scheme is simple, especially compared with the reduced complexity maximum likelihood sequence estimation (RC-MLSE) used in the typical PC scheme.

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“…However, this solution increases the cost and the complexity of PON infrastructure. Other than the OTDR-based schemes, optical code (OC)-based methods have been suggested to identify the faulty fiber in a high-capacity PON [15][16][17] . A modified optical coding scheme by using periodic code (PC) encoders was reported in Ref.…”

mentioning

confidence: 99%

Fault monitoring in passive optical network using code division multiplex-based dual-OTDR traces comparison

et al. 2017

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A dual optical time domain reflectometry (OTDR) system, which employs two different continuous waves at the optical line terminal and a pair of fiber Bragg gratings at the end of each optical network unit, is proposed in a time-division multiplexing passive optical network (PON). The proposed scheme accomplishes the fiber fault monitoring by comparing the different wavelength's testing curves. Complete complementary code is utilized to measure multiple wavelength signals simultaneously with only one receiver and to improve the dynamic range of this system. The PON system consisting of 20 km feeding fiber and a 1:16 splitter is investigated by the experiments. The experimental results show that the faulty branch can be successfully identified by using our scheme. What is more, we also demonstrate that our scheme can be applied to the multi-stage PON.

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Centralized PON Monitoring Scheme Based on Optical Coding

Cited by 31 publications

References 9 publications

Modelling and analysis of optimal fiber-fault decision for optical 2D-coding monitoring scheme in PONs

Modelling and analysis of optimal fiber-fault decision for optical 2D-coding monitoring scheme in PONs

Optical pulse width modulation based TDM-PON monitoring with asymmetric loop in ONUs

Fault monitoring in passive optical network using code division multiplex-based dual-OTDR traces comparison

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