Downstream performance analysis and optimization of the next generation passive optical network stage 2 (NG-PON2)

Kachhatiya, Vivek; Prince, Shanthi

doi:10.1016/j.optlastec.2018.02.007

Cited by 22 publications

(4 citation statements)

References 29 publications

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“…OFDM demodulator performance parameters should be identical with the transmitter to recover the m-QAM symbols at receiver side. The m-QAM sequence detector signifies the binary sequences and de-mapped the received electrical signal to retrieve the bit sequences (Kachhatiya and Prince 2018;Kaur et al 2017a). Then for wireless transmission, a 1×10 fork is used for copying the incoming signal into ten numbers of ideal single-mode LDs (390,430,470,510,550,590,630,670,710 and 750 nm) based VLC system.…”

Section: System Architecturementioning

confidence: 99%

Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

2021

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In this work, a full-duplex time and wavelength division multiplexing-passive optical network (TWDM-PON) system is analysed. Orthogonal frequency division multiplexing (OFDM) with m-quadrature amplitude modulation (m-QAM) is employed to improve the performance of TWDM-PON for downstream and upstream transmission. Simultaneously, multi-color (390-750 nm) laser diodes (LDs) are employed for visible light communication (VLC) using various VLC links to encourage the information rate of fiber/VLC optical network. A TWDM-PON utilizing 16-, 32-and 64-QAM OFDM with ten LDs based VLC system has been analysed for full-duplex multi-color VLC signals of the system. The impact of the LDs input current and high transmission rate in the proposed PON/VLC link has been investigated for m-QAM OFDM modulation. The results show that the 40/40 Gbps 16-, 32-and 64-QAM signals over ten 8000 m VLC links and a 50 km fiber link are successfully transmitted at the modulation input current of 9 mA under bit error rate (BER) of 3.8×10 -3 .Also, the proposed system employing 16-, 32-and 64-QAM signals over a 10 km fiber and ten 10 m VLC links provide the maximum transmission rate of 120, 100 and 80 Gbps respectively. Moreover, the measured error vector magnitudes (EVMs) and calculated BER values for 16-QAM downstream and upstream signals, are well below the required FEC limit than high-order modulation formats. Further, the numerical analysis of the proposed system reveals the superiority of the proposed fiber/VLC links.

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Section: System Architecturementioning

confidence: 99%

Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

2021

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“…These fascinating components offer low attenuation and high-speed over the fiber-FSO link distances. 9,10 Furthermore, the information signals from a parabolic-index multimode fiber (PIMMF) and an FSO link is fed to the output spatial aperture followed by a spatial connector and their parameters are imitated as identical as input spatial components to assure the phase matching.…”

Section: Concept and System Architecture Of Bidirectional Mdm-based Hmentioning

confidence: 99%

“…7 However, PON, a fiber access network may not be an adequate selection in certain regions where the fiber installations are costly because of the territorial restrictions. [8][9][10] Thus, to provide broadband capacity and a cost-effective last-mile network to all end-users, the emerging PON and optical wireless systems would be the favorable systems for high-speed information transmission. 11 Here, the most beneficial, free-space optics (FSO) technology can be effectively employed and combined with the PON to fix this issue.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of long‐reach 40/40 Gbps mode division multiplexing‐based hybrid time and wavelength division multiplexing passive optical network/free‐space optics using Gamma‐Gamma fading model with pointing error under different weather conditions

Kumari

Sharma

Sheetal

2021

Trans Emerging Tel Tech

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Time and wavelength division multiplexing passive optical network (TWDM-PON) is adopted across the globe and is considered as the most remarkable trend of the next-generation solution to serve exponential traffic growth for fifth-generation (5G) network. In the interest of achieving 5G network requirements, we propose a mode division multiplexing (MDM) based bidirectional 40/40 Gbps hybrid TWDM-PON and free-space optics (FSO) system. The system performance is analyzed for bidirectional hybrid fiber/FSO channels incorporating four distinct Laguerre-Gaussian (LG00, LG01, LG11, and LG21) spatial modes for variable fiber (10-155 km)/FSO (10-1000 m) link ranges and different receiver aperture diameters (20 μm-60 cm). Based on Gamma-Gamma (GG) modeled FSO channels using Laguerre Gaussian modes, bit error rate (BER) performance of the system is numerically investigated under the impact of dynamic atmospheric weather conditions, weak-to-strong turbulence conditions, pointing errors, and geometric loss (GL) at an acceptable BER of 10 −9. In addition, to support the numerical analysis, the simulation results exhibit that the hybrid fiber/FSO LG00 signals over 1000 m FSO and 155 km fiber link ranges are successfully transmitted in the system with 40 μm spatial and 60 cm FSO receiver aperture diameters under the impact of strong turbulence, atmospheric attenuation of 0.2 dB/km and noise. Moreover, the performance comparison of the MDM-based hybrid TWDM-PON/FSO with the previous latest literature works reveals a superior system performance under practical environment conditions. The proposed work can be utilized to realize longreach, bandwidth-efficient, high-capacity, and high-speed data transmission links.

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“…As per ITU G.989.3 recommendations, four to eight wavelengths can be operated in DS in L band ranging from 1590 to1610 nm, all with a data rate of 10 Gbps (Kachhatiya and Prince 2018a). Additionally, same number of wavelengths can also be operated in C band ranging from 1520 to1540 nm, each bearing 2.5 Gb/s or 10 Gb/s data (Kachhatiya and Prince 2018b). Each TWDM PON ONU is equipped with a tunable transceiver for being able to communicate with the OLT on suitable US/DS wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Sleep-aware wavelength and bandwidth assignment scheme for TWDM PON

et al. 2021

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The energy efficiency and delay performance of PON are two inversely related phenomena. Higher sleep time of the Optical Network Units (ONUs) results in higher upstream (US) delays due to increased traffic queues during the ONU Asleep state. Although an efficient dynamic bandwidth and wavelength assignment (DWBA) scheme can decrease US delays by minimizing the bandwidth waste and improving the fairness of bandwidth distribution among the ONUs. However, the conventional DWBA schemes are not designed to work with cyclic sleep mode (CSM) and they keep on assigning bandwidth to ONUs even if the ONU is in Asleep state leading to wastage of bandwidth and degraded CSM performance. Therefore, in this work a sleep aware DWBA scheme for TWDM PON is presented to coordinate with CSM mode. It only assign bandwidth to Active ONUs during the guaranteed phase, surplus phase and excess phase allocation phases which minimizes the bandwidth waste and the bandwidth lost at the ONU end. The wavelength switching process is also improved by only considering the Active state ONUs to balance the traffic load on all the wavelengths. The simulation results support our claim as the SA-DWBA scheme on average achieves DWBA schemes due to up to 50% to 65% higher energy savings compared to other due to longer ONU Asleep times. However, the increased upstream delays of all the traffic classes in SA-DWBA scheme remain within the set delay limit of 50 ms.

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Downstream performance analysis and optimization of the next generation passive optical network stage 2 (NG-PON2)

Cited by 22 publications

References 29 publications

Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

Performance analysis of long‐reach 40/40 Gbps mode division multiplexing‐based hybrid time and wavelength division multiplexing passive optical network/free‐space optics using Gamma‐Gamma fading model with pointing error under different weather conditions

Sleep-aware wavelength and bandwidth assignment scheme for TWDM PON

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