scholarly journals Entirely Passive Remote Node Design And System Architecture For Bus Topology Based 80Gbps Symmetrical NG-PON2

2021 ◽  
Author(s):  
Ramandeep Kaur ◽  
Simranjit Singh Tiwana ◽  
Rajandeep Singh ◽  
Simranjit Singh
Keyword(s):  
Bit Error Rate ◽  
System Architecture ◽  
Signal To Noise Ratio ◽  
Optical Network ◽  
Optical Signal ◽  
Passive Optical Network ◽  
Optical Frequency ◽  
Signal To Noise ◽  
Broadcast Network ◽  
Network Topologies

Abstract The next generation passive optical network stage 2 (NG-PON2) is a broadcast network in which a large number of optical network units (ONUs) can be served using various network topologies. In this paper, a purely passive remote node (RN) design based on fiber bragg grating (FBG) is presented for the bus topology of a high split NG-PON2 system. The performance of the proposed node has been analysed for a symmetric 80 Gbps NG-PON2 system serving 1024 ONUs in terms of bit error rate (BER) and optical signal to noise ratio (OSNR). The working of the proposed node has been explained with the optical frequency spectrums for downstream and upstream signals. The observed OSNR levels for the ONUs operating at the 1st RN is 84.8743dB which decreases to 75.7973dB for the ONUs connected to the 8th RN. The BER level < 10-9 for both upstream and downstream confirms the correct working of the proposed node in the NG-PON2 system.

scholarly journals PERANCANGAN DAN PENGUKURAN PERFORMANSI JARINGAN FIBER TO THE HOME DENGAN TEKNOLOGI GIGABIT PASSIVE OPTICAL NETWORK MENGGUNAKAN APLIKASI OPTISYSTEM DI KELURAHAN SURAU GADANG

2021 ◽  
Vol 11 (2) ◽  
pp. 22-27
Author(s):  
Siska Aulia ◽  
Silvia Fitri ◽  
Aprinal Adila Asril
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Rise Time ◽  
Signal To Noise Ratio ◽  
Time Budget ◽  
Optical Network ◽  
Google Earth ◽  
Passive Optical Network ◽  
Signal To Noise ◽  
Fiber To The Home

Pada tugas akhir ini dirancang suatu jaringan Fiber To The Home ( FTTH) di Kelurahan Surau Gadang yang mana daerah tersebut dilakukan perancangan dan pengukuran performasi jaringan dimana standar yang digunakan sesuai dengan PT. ICON+. Tata cara yang digunakan dalam perancangan ini ialah penen- tuan posisi, pengumpulan informasi, serta perancangan memakai aplikasi Google Earth serta OptiSystem. Hasil dari perbandingan antara pengukuran OptiSystem dan pengukuran di lapangan didapatkan hasil redaman yang berbeda, dimana hasil pengukuran pada OptiSystem pelanggan dengan jarak terjauh menghasilkan daya terima sebesar -18.277 dBm sedangkan untuk pengukuran di lapangan pelanggan dengan jarak terjauh menghasilkan daya terima sebesar -18.52 dBm. Parameter Rise Time Budget didapatkan dari perhitungan ialah 0. 029 ns yang sudah memenuhi stndar kelayakan ialah tidak lebih dari 0. 219 ns sedangkan nilai Bit Error Rate pada simulasi ialah 8.11464 x 10-33 yang sudah memenuhi standar kelayakan ialah tidak lebih dari 10-9. Nilai Signal To Noise Ratio (SNR) merupakan 50.044831 dB yang pula penuhi standar minimal SNR ialah 21.5 dB. Dari hasil perhi- tungan serta hasil simulasi didapatkan nilai-nilai yang masih memenuhi standar kelayakan jaringan Fiber To The Home sehingga rancangan layak buat diimplementasikan.

Applying Smart Security Model to Protect Client Services From the Threats of the Optical Network

2021 ◽  
pp. 80-113
Author(s):  
Kamel H. Rahouma ◽  
Ayman A. Ali
Keyword(s):  
Signal To Noise Ratio ◽  
Optical Network ◽  
Optical Signal ◽  
Software Defined Network ◽  
Security Model ◽  
Signal To Noise ◽  
New Model ◽  
Intelligent Software ◽  
Optical Transport Network ◽  
The Right

The chapter discusses the security of the client signals over the optical network from any wiretapping or loosing. The physical layer of the optical transport network (OTN) is the weakest layer in the network; anyone can access the optical cables from any location and states his attack. A security layer is proposed to be added in the mapping of OTN frames. The detection of any intrusion is done by monitoring the variations in the optical signal to noise ratio (OSNR) by using intelligent software defined network. The signal cryptographic is done at the source and the destination only. The chapter shows how the multi-failure restorations in the multi-domains could be done. A new model is introduced by slicing the multi-domains to three layers to fit the needs of 5G. The results show that the multi-failure restoration improved from 25% to 100%, the revenue from some OTN domains increased by 50%, the switching time enhanced by 50%, the latency reduced from 27 msec to 742 usec, and it will take many years to figure out the right keys to perform the decryption process.

scholarly journals Implementasi Layanan Internet Protocol Television Menggunakan MSAN Dan GPON

2020 ◽  
Vol 23 (2) ◽  
Author(s):  
Mohammad Hamdani ◽  
Yuneska K Wahyuningsih
Keyword(s):  
Signal To Noise Ratio ◽  
Optical Network ◽  
Internet Protocol ◽  
Passive Optical Network ◽  
Service Access ◽  
Transmission Losses ◽  
Signal To Noise ◽  
Internet Protocol Television ◽  
Noise Ratio ◽  
Ratio Transmission

Pada tulisan ini dibahas tentang bagaimana implementasi layanan IPTV terbaik dengan dua alternatifpemilihan teknologi, yaitu Multi Service Access Node (MSAN)atau Gigabit-Passive Optical Network(GPON),berdasarkan jarak pelanggan terhadap lokasi dari pemberi layanan IPTV tersebut. Untuk keperluantersebut dilakukan analisa terhadap parameter QoS dari layanan IPTV (yaitu Signal to Noise Ratio,Transmission Losses, Line Attenuation, dan Delay),baik yang menggunakan jaringan akses network MSAN,maupun yang menggunakan jaringan akses Gigabit-Passive Optical Network (GPON).Berdasarkan pengukuran dan perhitungan maka untuk memperoleh kualitas layanan IPTV yang baik, jarakmaksimal pelanggan dengan MSAN adalah 1 km. Bila jarak lebih dari 1 km maka diperoleh attenuasi dan rugitransmisi sangat tinggi, sehingga kualitas layanan IPTV menjadi kurang baik. Oleh sebab itu untuk jarak lebihdari 1 km dapat digunakan jaringan akses network FTTH-GPON, dimana redamannya kecil dan tidaktergantung oleh jarak pengkabelan. Dengan demikian jaringan akses FTTH-GPON merupakan solusi terbaikuntuk pelanggan didaerah yang berlokasi lebih dari 1 km terhadap MSAN/Remote DSLAM atau daerah yangtidak dimungkinkan bagi pemasangan MSAN.

scholarly journals Adaptive Pre/Post-Compensation of Cascade Filters in Coherent Optical Transponders

2020 ◽  
Vol 12 (2) ◽  
pp. 21
Author(s):  
Ahmad Abdo ◽  
Claude D’Amours
Keyword(s):  
Monte Carlo ◽  
Bit Error Rate ◽  
Error Rate ◽  
Gradient Descent ◽  
Signal To Noise Ratio ◽  
Optical Signal ◽  
Signal To Noise ◽  
Operating Region ◽  
Linear And Nonlinear ◽  
Additional Hardware

We propose an adaptive joint pre- and post-compensation to correct the filtering effects caused by cascading reconfigurable optical add drop multiplexers (ROADMs). The improvement is achieved without using additional hardware (HW) on the link or within the signal processor in the transponders. Using Monte Carlo simulations, the gradient-descent based method shows an improvement of 0.6 dB and 1.1 dB in the required optical signal-to-noise ratio (R-OSNR) at the threshold pre-decoder bit error rate (BER) of 0.02 versus pre-compensation only in the linear and nonlinear operating region of fiber respectively. We experimentally verified the method with lab measurements in the presence of heavy filtering and optical impairments. We observed a gain up to ~0.4 dB compared to typically used pre-compensation only. Additionally, other tangible system benefits of our method are listed and discussed.

scholarly journals Simultaneous monitoring of chromatic dispersion and optical signal to noise ratio in optical links using convolutional neural network and asynchronous delay-tap sampling

2020 ◽  
Vol 50 (3) ◽  
Author(s):  
Tomasz Mrozek ◽  
Krzysztof Perlicki ◽  
Andrzej Jakubiak
Keyword(s):  
Signal To Noise Ratio ◽  
Chromatic Dispersion ◽  
Optical Network ◽  
Optical Signal ◽  
Phase Portraits ◽  
Signal To Noise ◽  
Optical Links ◽  
Binary Images ◽  
Noise Ratio ◽  
Amplified Spontaneous Emission Noise

The article presents a method for image analysis using asynchronous delay-tap sampling (ADTS) technique and convolutional neural networks (CNNs), allowing simultaneous monitoring of many phenomena occurring in the physical layer of the optical network. The ADTS method makes it possible to visualize the course of the optical signal in the form of characteristics (so-called phase portraits), which change their shape under the influence of phenomena (including chromatic dispersion, amplified spontaneous emission noise and other). Using the VPIphotonics software, a simulation model of the ADTS technique was built. After the simulation tests, 10 000 images were obtained, which after proper preparation were subjected to further analysis using CNN algorithms. The main goal of the study was to train a CNN to recognize the selected impairment (distortion); then to test its accuracy and estimate the impairment for the selected set of test images. The input data consisted of processed binary images in the form of two-dimensional matrices, with the position of the pixel. This article focuses on the analysis of images containing simultaneously the phenomena of chromatic dispersion and optical signal to noise ratio.

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