检索结果-内蒙古大学图书馆

IEEE Conference on Innovative Technologies in Intelligent systems and Industrial Applications (CITISIA)

作者： Ng Boon Chuan Mohammad Syuhaimi Ab-Rahman Aswir Premadi Kasmiran Jumari Division Computer and Network Security Research Group Department of Electrical Electronics and Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi Malaysia

This paper proposed a network management software tool named smart access network _ testing, analyzing and database (SANTAD) that associated with remotely controlling, optical monitoring, system analyzing, fault detection, protection switching, and automatic recovery apparatus for fiber-to-the-home passive optical network (FTTH-PON) based on Visual Basic programming. The developed program is able to prevent and detect any occurrence of fault in the network system through centralized monitoring and remote operating from central office (CO) via Ethernet connection. SANTAD enable the status of each transmission link to be displayed on a single computer screen with capability to configure the drastic drop of optical signal level and detect the failure simultaneously. The analysis results will then stored in database with certain attributes such as date and time, network failure rate, failure location, etc. The database system enable the history of network scanning process be analyzed and studied by the engineers.

关键词： Software tools Passive optical networks Optical fiber testing Optical control Optical fiber networks computerized monitoring Remote monitoring Fault detection Automatic testing Software testing

来源：评论

学校读者我要写书评

暂无评论

Multi access detection system for line monitoring in fiber to the home (FTTH)

Multi access detection system for line monitoring in fiber t...

引用

International Conference on Space Science and Communication (IconSpace)

作者： Mastang Mohammad Syuhaimi Ab-Rahman Kasmiran Jumari Computer and Network Security Research Group Department of Electrical Electronic & Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Selangor Darul Ehsan Malaysia

This paper presented a status monitoring system designed to improve fiber-to-the-home (FTTH) engineering work by enabling technicians in central offices to observe, in real time, the usage state of FTTH services for each line in detail when they perform operations such as changing cable routes. This will reduce service interruptions. For FTTH access services, optical network units (ONUs) are installed in customer premises and optical line terminals (OLTs) are installed in the central office. The monitoring system is connected to the fiber section between ONUs and an OLT, and it receives the upstream optical signal from the ONU. This optical signal is converted to 1-bit signal to be processed by computer. Every ONU is equipped with wireless transmitter and PIC microcontroller to send signal to wireless receiver (multipoint to point). The display program is created to monitor the condition of FTTH lines.

关键词： Optical fiber subscriber loops Optical network units Optical fiber cables Optical receivers Optical transmitters Central office computerized monitoring Integrated optics Signal processing Design engineering

来源：评论

学校读者我要写书评

暂无评论

Access Control System: A Cost Effective Protection Scheme for Fiber Fault Identification

Access Control System: A Cost Effective Protection Scheme fo...

引用

International Conference on Signal Acquisition and Processing, ICSAP

作者： Aswir Premadi Mohammad Syuhaimi Ab-Rahman Siti Asma Che Aziz Kasmiran Jumari Computer and Network Security Research Group Department of Electrical Electronic & Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Selangor Darul Ehsan Malaysia

In this paper, we present access control system (ACS) a cost effective protection for fiber fault identification in fiber to the home (FTTH) passive optical network (PON). To achieve better protection, ACS can access by remote host via Internet or LAN, with the specification available a complete system can be made with 24 man-hours. Our solution is shown to be effective in improving live-fiber services.

关键词： Access control Costs Protection Fault diagnosis Optical fiber LAN Optical fiber networks Passive optical networks Optical fiber subscriber loops Internet Local area networks

来源：评论

学校读者我要写书评

暂无评论

Approach to extracting hot topics based on network traffic content

引用

Frontiers of Electrical and Electronic engineering in China 2009年第1期4卷 20-23页

作者： Yadong ZHOU Xiaohong GUAN Qindong SUN Wei LI Jing TAO MOE Key Lab for Intelligent Networks and Network Security State Key Lab for Manufacturing SystemsXi’an Jiaotong UniversityXi’an 710049China Department of Automation Tsinghua National Lab for Information Science and TechnologyTsinghua UniversityBeijing 100084China School of Computer Science and Engineering Xi’an University of TechnologyXi’an 710048China

This article presents the formal definition and description of popular topics on the Internet,analyzes the relationship between popular words and topics,and finally introduces a method that uses statistics and correlation of the popular words in traffic content and network flow characteristics as input for extracting popular topics on the *** on this,this article adapts a clustering algorithm to extract popular topics and gives formalized *** test results show that this method has an accuracy of 16.7%in extracting popular topics on the *** with web mining and topic detection and tracking(TDT),it can provide a more suitable data source for effective recovery of Internet public opinions.

关键词： hot topic extraction network traffic content Internet public opinion analysis

来源：评论

学校读者我要写书评

暂无评论

Passive optical signal tapping device

引用

Journal of Applied Sciences 2009年第20期9卷 3731-3738页

作者： Ab-Rahman, M.S. Ng, B.C. Ismail, R. Spectrum Technology Research Division Computer and Network Security Research Group Department of Electrical Electronic and Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

A fully passive optical signal tapping device named Passive In-line Monitoring (PIM) device is developed to provide and increase the monitoring and maintenance capabilities of Fiber-To-The-Home (FTTH). This device will be permanently installed with the FTTH trunk lines to tap out a small ratio of triple-play signals for monitoring appliance without affecting the service transmission. The PIM device optically splits the full-duplex signals into two portions;98% maintains in the transmission link, while the other 2% is simultaneously connects to a portable tester unit for identifying the signal presence and direction. Such features also allow the network operators to maintain and operate their network more cost-effectively and offer the end-users with an improved survivability and reliability network, which is continuously monitored 24 h a day and 7 days a week. A PIM device prototype had been successfully developed in this study and implemented in FTTH. The experimental results show the parameters of PIM device are operating wavelength 1310/1480/1550 ran, operating bandwidth±15 ran, insertion loss35 dB and directionality>55 dB. © 2009 Asian network for Scientific Information.

关键词： Fiber to the x

来源：评论

学校读者我要写书评

暂无评论

Development of Smart Drop Restoration Scheme for Customer's Ease in the i-FTTH EPON network Solution

Development of Smart Drop Restoration Scheme for Customer's ...

引用

International Conference on computer Technology and Development (ICCTD)

作者： Siti Rahayu Hassan Mohd Syuhaim Ab-Rahman Kasmiran Jumari Computer & Network Security Research Group Faculty of Engineering & Built Environment Department of Electrical Electronic and Systems Engineering Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

This paper addresses a new restoration mechanism in drop region of EPON network by using the optical switch device to increase the efficiency, survivability and reliability of fiber to the home (FTTH) customer access network. The developed device will be installed at the drop section to detect the failure line that occurs in the multi-line drop section of FTTH network downwardly from passive optical splitter to the customer premises (ONU). The drop section restoration mechanism called smart drop restoration scheme (SDRS) will contribute for tree based and bus based architecture. Conventionally, the failure line of FTTH network can be measured using Optical Time-Domain Reflectometer (OTDR) upwardly from customer premises to the central office. The optical switches will be controlled by Access Control System (ACS). If the breakdown is the detected in drop section, ACS will recognize the related access line by the 3% tapped signal that is connected to every access line. The activation signal is then sent to activate the dedicated protection scheme. But if fault is still not restored, the shared protection scheme will be activated. Results from Optisystem software simulation will be presented so as to prove the solution feasibility.

关键词： EPON Optical fiber networks Optical fiber subscriber loops Optical switches Passive optical networks Protection Telecommunication network reliability Optical fiber devices Optical devices Optical network units

来源：评论

学校读者我要写书评

暂无评论

Turn-on Time Delay of Uncooled Semiconductor Laser Diode Subject to External Optical Feedback: Theoretical Analysis

Turn-on Time Delay of Uncooled Semiconductor Laser Diode Sub...

引用

International Conference on computer Technology and Development (ICCTD)

作者： Mohammad Syuhaimi Ab-Rahman Mazen R. Hassan Computer & Network Security Research Group Faculty of Engineering & Built Environment Department of Electrical Electronic and Systems Engineering University Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

In this paper, the effect of external optical feedback (EOF) on the turn-on time delay (t on ) of uncooled semiconductor laser diode (SLD) is investigated theoretically. The effects temperature of operation (T) and EOF on t on are calculated according to their effect on threshold carrier density (N th ). The temperature dependence (TD) of N th is calculated according to the TD of laser cavity parameters and not by the well-known Parkove relationship. Simulation results show that t on increases as T increases due to increasing of N th . In addition, t on decreases as external reflectivity (r ext ) increases when the phase of reflected light is coherent. While at incoherent reflected light, t on increases sharply around specified value of r ext where this leads to inoperable case for SLD.

关键词： Delay effects Diode lasers Optical feedback Superluminescent diodes Temperature Laser feedback Charge carrier density Laser theory Reflectivity Optical fiber networks

来源：评论

学校读者我要写书评

暂无评论

Temperature-pattern dependence of initial carrier density of high-speed digitally modulated uncooled semiconductor laser diodes: Theoretical analysis

Temperature-pattern dependence of initial carrier density of...

引用

International Conference on Electrical engineering and Informatics, ICEEI

作者： Mohammed Syuhaimi Ab-Rahman Mazen R. Hassan Computer & Network Security Research Group Faculty of Engineering & Built Environment Department of Electrical Electronic and Systems Engineering University Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

In this paper, the temperature-pattern dependence (T-PD) of initial/residual carrier density, Ni, of high-speed digitally modulated uncooled semiconductor laser diode has been investigated in details. The temperature dependence (TD) of N ii has been calculated according to the TD of threshold carrier density, N th , analytically and not by the well known exponential Pankove. While the pattern dependence (PD) of N i has been calculated according to the effect of the number of ldquo0rdquo bits preceding the considered ldquo1rdquo bit, N bit , and bitrate, Brate, on the carrier density through the time interval between the ldquo1rdquo bits. We show, for the first time, that Ni may increase or decrease, i. e. fluctuate, with temperature of operation, T, depending on the time interval between the previous and the next ldquo1rdquo bits.

关键词： Charge carrier density Digital modulation Diode lasers Optical receivers Optical transmitters Optical modulation Passive optical networks Optical feedback Circuits Superluminescent diodes

来源：评论

学校读者我要写书评

暂无评论

Automatic Protection Unit in Application of Restoration Scheme for FTTH Passive Optical network

Automatic Protection Unit in Application of Restoration Sche...

引用

International Conference on computer Technology and Development (ICCTD)

作者： Siti Asma Che Aziz Mohammad Syuhaimi Ab Rahman Kasmran Jumari Department of Electrical Electronic and Systems Engineering Computer and Network Security Research Group Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

Fiber to the home (FTTH) network security has become a very essential and important topic for optical network. Fault isolation became important issues in order to provide an efficient FTTH network and simultaneously will provide continuous services to the end user without being interrupted by any failure in fiber line. Protection scheme against the failure in distribution fiber line is carried out using our protection and restoration scheme. This paper focused on the implementation of automatic device switching to perform in restoration scheme located at distribution fiber section. This protection device is potentially will improve the system efficiency in order to provide the continuous data flow until it reach to the end user. We implement for immediate split structure in Fiber to the Home (FTTH-EPON) network when the signal is totally split when it pass through the optical splitter. Automatic Protection Unit (APU) is an automatic switching device designed as a package that offered for the ease of customer to perform security and self restoration at the end user side. While in this paper also includes the power penalty analysis for optical switch cascaded in our network protection design according to the APU device.

关键词： Optical fiber subscriber loops Passive optical networks Optical fiber networks Optical fiber devices Signal restoration Optical network units Power system protection Packaging Optical switches Optical design

来源：评论

学校读者我要写书评

暂无评论

Implementation of Access Control System for Fiber to the Home

Implementation of Access Control System for Fiber to the Hom...

引用

International Conference on computer and Automation engineering, ICCAE

作者： Mohammad Syuhaimi Ab-Rahman Aswir Premadi Computer and Network Security Research Group Department of Electrical Electronics & Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

This paper proposes a design and architecture of access control system to implement remote monitor and control for fiber to the home. Our solution works on a standard local area network (LAN) using a specially designed hardware interfaced with an Ethernet system rising PIC microcontroller. The developed design will be installed with optical line terminal (OLT) at the central office (CO). Protection switching is achieved automatically when failure occurs without interrupting customer service.

关键词： Passive optical networks Optical network units High speed optical techniques Microcontrollers Ethernet networks Hardware Design engineering Local area networks Integrated optics Condition monitoring

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：