A Clock-Gating-Based Energy-Efficient Scheme for ONUs in Real-Time IMDD OFDM-PONs

Zhang, Junjie; Zhao, Jiahe; Huang, Hung-Lung; Ye, Nan; Giddings, R. P.; Li, Zhengxuan; Qin, Deli; Zhang, Qianwu; Tang, J. M.

doi:10.1109/jlt.2020.2977053

Cited by 6 publications

(5 citation statements)

References 18 publications

(29 reference statements)

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“…To verify the performance of the layered LDPC decoder with the proposed architecture in OFDM-PON, experiments are undertaken by an FPGA-based OFDM-PON platform previously used in [19][20][21] and an FPGA-based LDPC decoder, as shown in Figure 7. In this paper, two Xilinx FPGA boards (ML605) with Virtex-6 XC6VLX240T are used in the implementation of the OFDM-PON platform.…”

Section: Methodsmentioning

confidence: 99%

Efficient Pipeline Conflict Resolution for Layered QC-LDPC Decoders in OFDM-PON

Wang,

Xu,

Chen

et al. 2024

Preprint

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Pipeline conflicts arising from data dependencies are a common issue encountered in the hardware implementation of layered QC-LDPC decoders. This paper proposes an efficient layered decoding architecture to reduce pipeline conflicts without introducing stall cycles, by reordering the processing order offline and using the patch method based on variable-to-check message. The experimental results on the LDPC code of the IEEE802.16 standard in the OFDM-PON system demonstrate that the proposed architecture has a sensitivity improvement of 0.125 dBm and 0.375 dBm, respectively, compared with our previous work and the method described in the other work.

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Section: Methodsmentioning

confidence: 99%

Efficient Pipeline Conflict Resolution for Layered QC-LDPC Decoders in OFDM-PON

Wang,

Xu,

Chen

et al. 2024

Preprint

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show abstract

“…To verify the performance of the layered LDPC decoder with the proposed architecture in OFDM-PON, experiments are undertaken by an FPGA-based OFDM-PON platform previously used in [23][24][25][26][27] and an FPGA-based LDPC decoder, as shown in Figure 7. In this paper, two Xilinx FPGA boards (ML605) with Virtex-6 XC6VLX240T are used in the implementation of the OFDM-PON platform.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, only half of the subcarriers can be used for transmission. Further, to overcome the low-pass characteristics of the channel and the ADC roll-down effects, we only use 2 to 28 subcarriers to carry the encoded data, as we did in our previous work [23]. And the power spectral density when 2 to 28 subcarriers are turned on is shown in Figure 9.…”

Section: Methodsmentioning

confidence: 99%

Efficient Pipeline Conflict Resolution for Layered QC-LDPC Decoders in OFDM-PON

Wang,

Xu,

Chen

et al. 2024

Photonics

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The high standard of communication quality in optical access networks makes forward error correction (FEC) schemes, such as LDPC, an integral part of the system. However, pipeline conflict arising from data dependencies is a common issue encountered in the hardware implementation of layered QC-LDPC decoders. This paper proposes an efficient layered decoding architecture to reduce pipeline conflicts without introducing stall cycles. It can solve some of the pipeline conflicts by flexibly reordering the processing order of inter-layer and intra-layer submatrices offline. In addition, the patch method, based on variable-to-check messages, allows for the delayed use of gains between layer iterations, which can further minimize the performance loss caused by the remaining pipeline conflicts. The experimental results on the LDPC code of the IEEE802.16 standard in the OFDM-PON system demonstrate that the proposed architecture has sensitivity improvements of 0.125 dBm and 0.375 dBm, respectively, compared with our previous work and the method described in the other work. The optimized architecture improves the reliability of the decoder and can also make a contribution to efficient PON systems.

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“…An efcient clock gating-based approach for orthogonal frequency multiplexing PONs was reported in [5] to enhance the energy efciency of ONU applications. Traditional approaches categorize the received frames based on ONU, and later, it is used to control the orthogonal frequency division multiplexing (OFDM) demodulation module clock.…”

Section: Related Workmentioning

confidence: 99%

Energy-Efficient Regional Area Metropolitan Optical Access Network (RAMOAN) Using Modified Load Adaptive Sequence Arrangement (M-LASA) Methodology

Kumar

Mohan

2023

International Transactions on Electrical Energy Systems

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Energy efficiency in optical networks is one of the important criteria to attain enhanced performance. Better energy efficiency can be attained in optical networks if the resources are properly scheduled. Polling sequences perform resource scheduling based on load requirements, and various methodologies have evolved in recent times for better efficiency. Load adaptive sequence arrangement (LASA) is one of the familiar and efficient methodologies adopted in various methodologies. However, the power consumption and idle time of optical network units are high which should be reduced to attain optimal network performances. Considering this, a modified LASA is presented in this research work for the regional area metropolitan optical access network (RAMOAN). The modified LASA is obtained by integrating the first-in-last-out polling sequence such that the proposed arrangement provides a better coverage radius, minimal power cost, maximum access reach, maximum energy saving, and minimal delay and energy cost. The better performance of the proposed approach is compared with traditional time and wavelength division multiplexed (TWDM), TWDM-protected, and RAMOAN with LASA through simulation analysis to validate the better performances of the proposed model.

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A Clock-Gating-Based Energy-Efficient Scheme for ONUs in Real-Time IMDD OFDM-PONs

Abstract: Peer reviewed versionCyswllt i'r cyhoeddiad / Link to publication Dyfyniad o'r fersiwn a gyhoeddwyd / Citation for published version (APA):

Cited by 6 publications

References 18 publications

Efficient Pipeline Conflict Resolution for Layered QC-LDPC Decoders in OFDM-PON

Efficient Pipeline Conflict Resolution for Layered QC-LDPC Decoders in OFDM-PON

Efficient Pipeline Conflict Resolution for Layered QC-LDPC Decoders in OFDM-PON

Energy-Efficient Regional Area Metropolitan Optical Access Network (RAMOAN) Using Modified Load Adaptive Sequence Arrangement (M-LASA) Methodology

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