scholarly journals Visualization Tool for Control Signalling in NG-PON2

2016 ◽  
Vol 12 (2) ◽  
pp. 117
Author(s):  
Michal Jurcik ◽  
Tomas Horvath
Keyword(s):  
New Technologies ◽  
Optical Network ◽  
Passive Optical Network ◽  
Visualization Tool ◽  
C Programming Language ◽  
C Programming ◽  
Control Message ◽  
Promising Solution ◽  
Industry Professionals

The requirements of end users on the quality of Internet connection and services is forcing the Internet providersand technical community to propose and introduce new technologies which may react to this demand. The most promising solution in this regard seems to be a passive optical network. There are many standards and recommendations provided by the organizations IEEE and ITU-T, such as EPON, GEPON, G-PON, XG-PON, and newly added NG-PON2 described in the ITU-T G.989 recommendation. Due to the implementation of TWDM mechanism the recommendation describes additionalcontrol messages to manage the whole network. This leads us to a need for a visualization tool which clearly shows control message flows and events between ONU and OLT units for each state. The application, designed by the authors and developed in C# programming language, is mainly focused on education purposes, but could be also useful to skilled industry professionals and in general those who have read the standard but are not fully familiar with the sequence of data flow in NG-PON2.

scholarly journals Passive Optical Network Survivability: Protection, Detection and Restoration

2015 ◽  
Vol 1 (1) ◽  
pp. 128-142
Author(s):  
Huda Saleh Abbas ◽  
Mark A Gregory
Keyword(s):  
Performance Metrics ◽  
Network Reliability ◽  
Optical Network ◽  
Access Network ◽  
Passive Optical Network ◽  
Network Availability ◽  
Restoration Time ◽  
Optical Line ◽  
Fiber Link

Passive optical network (PON) technologies have received increasing attention as demand for fibre access networks has grown. Enhancing fibre access network reliability provides lower operational costs, and improves customer satisfaction. This paper discusses PON survivability including protection schemes for the fiber link and the Optical Line Terminal (OLT), the exciting monitoring techniques of the fiber link, and the effect of reducing the restoration time on the network availability. The main contribution of this study is to provide two protection schemes namely OLT-only-protected and OLT-and-ring protected. The proposed schemes are designed to handle instances of single failure affecting all customers in the network. This work considers three key performance metrics- Failure Impact Robustness (FIR), cost, and availability. The objective of the proposed protection architectures is to guarantee high quality of service at low costs by protecting critical network elements such as OLT and fiber ring. The proposed architectures have been compared with other well-known protection schemes. The results postulate that OLT-and-ring protected approach has 99.993% availability with a 0.09% increase in cost compared to the ring-only protection architecture.

scholarly journals Modeling and simulation of heat and mass transfer during drying of coffee in a box dryer using C++ programming language

2021 ◽  
Vol 24 ◽  
Author(s):  
Gildeir Lima Rabello ◽  
Uilla Fava Pimentel ◽  
Donato Aranda ◽  
Willian Poubel
Keyword(s):  
Mass Transfer ◽  
Modeling And Simulation ◽  
Temperature Profile ◽  
Programming Language ◽  
Air Temperature ◽  
Phenomenological Model ◽  
Drying Time ◽  
C Programming Language ◽  
C Programming

Abstract Drying is one of the stages of coffee processing and has been considered one of the factors that impact the quality of the final drink. In this sense, the present study developed a phenomenological model for a box-type dryer implementing in C / C ++ programming language. The profile of the exhaust air temperature was obtained over the drying time. The model was verified by comparing data obtained from the literature, thus guaranteeing its functionality to make predictions about the air temperature profile in equipment used by small coffee producers, which may contribute to the increase in product quality.

scholarly journals Analisa Kualitas Delay Video on Demand Useetv Menggunakan Serat Optik Di Area Purwokerto

2017 ◽  
Vol 18 (2) ◽  
pp. 83
Author(s):  
Widhiatmoko Herry Purnomo ◽  
Farida Asrian
Keyword(s):  
Quality Of Service ◽  
Optical Network ◽  
Internet Protocol ◽  
Video On Demand ◽  
Passive Optical Network ◽  
On Demand

Video on Demand adalah salah satu layanan UseeTV IndiHome PT. Telekomunikasi Indonesia, Tbk berbasis IP (Internet Protocol).  Video on Demand (VoD) merupakan salah satu fitur dari UseeTV yang memungkinkan pelanggan untuk dapat melakukan perekaman, penyimpanan dan penayangan kembali acara televise tertentu. Untuk mendapatkan kinerja yang baik maka layanan ini membutuhkan bandwidth yang cukup besar. Teknologi Gigabit-Capable Passive Optical Network (GPON) menjadi teknologi yang dapat mendukung layanan ini. Dalam layanan UseeTV, aktifitas jalur downstream menjadi perlakuan khusus, sehingga Quality of Service (QoS) dan kepadatan trafik perlu diperhatikan.Salah satu parameter yang berpengaruh terhadap layanan UseeTV adalah delay. Semakin kecil nilai delay  maka akan semakin baik juga layanan UseeTV yang diterima oleh pelanggan. 

scholarly journals MongoDB Database as Storage for GPON Frames

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6208
Author(s):  
Martin Holik ◽  
Tomas Horvath ◽  
Vaclav Oujezsky ◽  
Petr Munster ◽  
Adrian Tomasov ◽  
...  
Keyword(s):  
Programming Languages ◽  
Optical Network ◽  
Passive Optical Network ◽  
Application Development ◽  
International Telecommunication ◽  
High Processing Speed ◽  
C Programming ◽  
Field Programmable ◽  
High Processing ◽  
Test Scenarios

This work is focused on creating an open-source software-based solution for monitoring traffic transmitted through gigabit passive optical network. In this case, the data are captured by the field-programmable gate array (FPGA) card and reassembled using parsing software from a passive optical network built on the International Telecommunication Unit telecommunication section (ITU-T) G.984 gigabit-capable passive optical network GPON recommendation. Then, the captured frames are converted by suitable software into GPON frames, which will be further processed for analysis. Due to the high transfer rate of GPON recommendations, the work describes the issue of writing to the Mongo database system. In order to achieve the best possible results and minimal loss of transmitted frames, a series of tests were performed. The proposed test scenarios are based on different database writing approaches and are implemented in the Python and C# programming languages. Based on our results, it has been shown that the high processing speed is too high for Python processing. Critical operations must be implemented in the C# programming language. Due to rapid application development, Python can only be used for noncritical time-consuming data processing operations.

Protection Approach against SRLG Failure for Survivable Long-Reach Passive Optical Network in Smart Grid

2014 ◽  
Vol 1049-1050 ◽  
pp. 2131-2134
Author(s):  
Hong Hao Zhao ◽  
Fan Bo Meng ◽  
Tai Yi Fu ◽  
Ming Shuang Gao
Keyword(s):  
Smart Grid ◽  
Optical Network ◽  
Passive Optical Network ◽  
High Rate ◽  
Reliability Model ◽  
Fiber Failure ◽  
Key Issues ◽  
Promising Solution ◽  
Shared Risk ◽  
Network Component

Long-Reach Passive Optical Network (LR-PON) is widely acknowledged as a promising solution for communication system in smart grid. Survivability is one of the key issues in the planning of LR-PON because massive high-rate traffic flows may be interrupted in case of network component failure. However, the survivability issue of LR-PON is addressed in few works. Most of previous works focus on single distribution fiber failure and remain untouched the simultaneous failure of multiple distribution fibers. In this paper, we focus on the survivability of LR-PON against single Shared-Risk Link Group (SRLG) failure. A reliability model is proposed to represent the probability of reliable connection for each Optical Network Unit (ONU). Based on this reliability model, we propose a novel Backup Fibers Protection (BFP) approach, aiming at the optimization of joint allocating backup capacity and deploying backup fibers. Through extensive simulation, we investigate the performance of BFP and demonstrate its effectiveness in different scenarios.

scholarly journals An algorithm for scheduling hybrid slot-size to increase traffic density in EPONs

2021 ◽  
Vol 8 (1) ◽  
pp. 028-038
Author(s):  
Jayanth C. ◽  
B. Sivakumar
Keyword(s):  
Bandwidth Allocation ◽  
Scheduling Algorithm ◽  
Optical Network ◽  
Future Generation ◽  
Passive Optical Network ◽  
Traffic Density ◽  
Prime Concern ◽  
Slot Size ◽  
Control Message ◽  
Time Cycle

The current basically Ethernet passive optical network (EPON) efficiently supports different service classes, i.e., Giant Prime concern (GP) traffic and Efficiently-best (EE) traffic, in future-generation networks. The difficult task is finding the efficient Dynamic Bandwidth Allocation (DBA) procedure task which suggests service classes of bandwidth simultaneously. This paper suggests improved version to DBA algorithm, Remodeled version-Hybrid division-size/Rate (HDSR) scheme. The modified control message scheduling algorithm is also discussed along with Remodeled-HDSR Algorithm which fits to the proposed scheme. In the modified Remodeled-HSSR scheme, time cycle length is identical classified accordingly with two subparts. In algorithm as explained in order to increase traffic density, the subdivision part of the planned cycle, the traffic conditions are dynamically suggested an improved version for Best effort traffic of multiple ONUs. In the First subdivision part of the span time analysis time will not be compressed, particularly at less buffer status conditions plan buffer status of the HP traffic. The Remodeled control message algorithm which predefined status and is scheduled particularly which controls connecting the sub-parts of the planned cycles of the sequence time and in-turn increases synchronization between two Gate messages to particular ONUs.

scholarly journals A Hybrid Bandwith Allocation Algorithm for EPON-WiMAX Integrated Networks Based on Auction Process

2021 ◽  
Author(s):  
Mohamed Ahmed Maher ◽  
Fathi Abd El-samie ◽  
Osama Zahran
Keyword(s):  
Quality Of Service ◽  
Bandwidth Allocation ◽  
Service Providers ◽  
Stackelberg Game ◽  
Optical Network ◽  
Service Level ◽  
Passive Optical Network ◽  
Allocation Strategy ◽  
Integrated Networks

Abstract Integration of Ethernet passive optical network (EPON) and WiMAX technologies is viewed as a great solution for next-generation broadband access networks. In the systems adopting this strategy, weighty bandwidth allocation schemes are fundamental to fulfil the quality of service (QoS) and fairness requirements of different traffic classes. Existing proposals to overcome the bandwidth allocation problem in EPON/WiMAX networks dismiss collaboration between the self-interested EPON and WiMAX service providers (WSPs). This study presents a novel EPON-based semi-dynamic bandwidth allocation (S-DBA) method that shows points of interest in the integration process. In the proposed algorithm depending on the auction process, the optical line terminal runs an auction to adequately post the optical network unit bandwidth that distributes the most elevated bidders based on the measurement of the accessible bandwidth. Simulation results demonstrate massive upgrades compared with fair sharing using dual-service-level agreements, ‘limited service’ interleaved polling with adaptive cycle time methods, bandwidth allocation strategy using Stackelberg game, and bandwidth allocation strategy using coalition game regarding the quality of service parameters such as throughput and time delay. This will be extremely helpful for optical system upgrading and improvement with minimal effort.

Performance Evaluation of Ethernet Passive Optical Network for Smart Grid

2014 ◽  
Vol 667 ◽  
pp. 149-152 ◽  
Author(s):  
Fan Bo Meng ◽  
Tai Yi Fu ◽  
Jun Nan Wang ◽  
Jing Tao Yu ◽  
Chan Nan Zhu
Keyword(s):  
Smart Grid ◽  
Bandwidth Allocation ◽  
Optical Network ◽  
Packet Delay ◽  
Passive Optical Network ◽  
Access Technology ◽  
High Bandwidth ◽  
Promising Solution ◽  
Ethernet Passive Optical Network ◽  
Bandwidth Capacity

As a mature access technology for the communication in smart grid, Ethernet Passive Optical Network (EPON) is widely considered as a promising solution due to high bandwidth capacity and stability. In recent years, EPON technology has received much attention and introduced into smart grid. The particularity of smart grid largely depends on bandwidth allocation. In this paper, we evaluate the performances of smart grid with three bandwidth allocation algorithms, i.e., Poll with Stop (PS), Max and Min Bandwidth Bounds (MMBB) and Cyclic Strategy (CS), respectively. The simulation results in this paper show the advantages of CS algorithm in terms of packet delay and throughput.

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