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.

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.

scholarly journals ALICE Central Trigger System for LHC Run 3

2021 ◽  
Vol 251 ◽  
pp. 04022
Author(s):  
Jakub Kvapil ◽  
Anju Bhasin ◽  
Marek Bombara ◽  
David Evans ◽  
Anton Jusko ◽  
...  
Keyword(s):  
Distribution System ◽  
Optical Network ◽  
Passive Optical Network ◽  
High Rate ◽  
Readout System ◽  
Timing Control ◽  
Trigger System ◽  
Triggering Mechanism ◽  
Alice Experiment ◽  
Backward Compatibility

A major upgrade of the ALICE experiment is in progress and will result in high-rate data taking during LHC Run 3 (2022-2024). The LHC interaction rate at Point 2 where the ALICE experiment is located will be increased to 50 kHz in Pb–Pb collisions and 1 MHz in pp collisions. The ALICE experiment will be able to read out data at these interaction rates leading to an increase of the collected luminosity by a factor of up to about 100 with respect to LHC Runs 1 and 2. To satisfy these requirements, a new readout system has been developed for most of the ALICE detectors, allowing the full readout of the data at the required interaction rates without the need for a hardware trigger selection. A novel trigger and timing distribution system will be implemented, based on Passive Optical Network (PON) and GigaBit Transceiver (GBT) technology. To assure backward compatibility a triggered mode based on RD12 Trigger- Timing-Control (TTC) technology, as used in the previous LHC runs, will be maintained and re-implemented under the new Central Trigger System (CTS). A new universal ALICE Trigger Board (ATB) based on the Xilinx Kintex Ultrascale FPGA has been designed to function as a Central Trigger Processor (CTP), Local Trigger Unit (LTU), and monitoring interfaces. In this paper, this new hybrid multilevel system with continuous readout will be described, together with the triggering mechanism and algorithms. An overview of the CTS, the design of the ATB and the different communication protocols will be presented.

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.

Application and Analysis of Long-Distance EPON in Transmission Lines Monitoring System

2011 ◽  
Vol 317-319 ◽  
pp. 1583-1589 ◽  
Author(s):  
Hui Huang ◽  
Hao Zhang
Keyword(s):  
Communication Network ◽  
Smart Grid ◽  
Monitoring System ◽  
Transmission Lines ◽  
Optical Network ◽  
Passive Optical Network ◽  
Long Distance ◽  
Factors Affecting ◽  
Long Distance Transmission ◽  
Ethernet Passive Optical Network

Ethernet Passive Optical Network (EPON) has been widely used in the Smart Grid. However, the overlay radius of EPON system is generally a 20 km, which has become the obstacle of application of EPON in Smart Grid.This paper introduces the advantages of EPON and analyzes the need for long-distance EPON of t Transmission Lines Monitoring System. And also this paper analyzes the factors affecting the long-distance transmission of EPON. Then this paper discusses the implementation of long-distance EPON and proposes a scheme of achieving communication network of Transmission Lines Monitoring System based on long-distance EPON.

Research of Adaptive Control Bi-OADM in Passive Optical Network

2014 ◽  
Vol 716-717 ◽  
pp. 1395-1398
Author(s):  
Kang Yang ◽  
Mu Zhang ◽  
Ying Juan Yue
Keyword(s):  
Adaptive Control ◽  
Optical Network ◽  
Optical Switches ◽  
Passive Optical Network ◽  
Switching Scheme ◽  
Low Loss ◽  
Fiber Failure ◽  
Path Switching

Architecture of adaptive control Bi-OADM is presented. Employing alternate-path switching scheme, the bi-directional traffic can be restored promptly under certain direction fiber failure in passive optical network (PON). The results indicate the adaptive control OADM exhibits a low loss (SMSR=15dB). As all the alternate-path switching is performed at optical switches, the administration and management cost can also be easily optimized.

scholarly journals Survivability Analysis of Ethernet Passive Optical Network Applied in Strong Smart Grid

2012 ◽  
Vol 16 ◽  
pp. 1776-1784 ◽  
Author(s):  
Zheng Wei ◽  
Shou Guochu ◽  
Guo Zhigang ◽  
Hu Yihong
Keyword(s):  
Smart Grid ◽  
Optical Network ◽  
Passive Optical Network ◽  
Ethernet Passive Optical Network
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