Aswir Premadi

Transmission surveillance and self-restoration against fibre fault for time division multiplexing using passive optical network

This study proposes a practical transmission surveillance and self-protection scheme for time division multiplexing using passive optical network (TDM-PON) with centralised monitoring and self-restorable apparatus. Troubleshooting a TDM-PON involves locating and identifying the source of an optical problem in what may be a complex optical network topology that includes several optical line terminals (OLTs), optical splitters, fibres and optical network units (ONUs). Since most components in the network are passive, a large part of the issues are due to dirty/damaged/misaligned connectors or breaks/macrobends in optical fibre cables. These will affect one, some or all subscribers in the network, depending on the location of the problems. The proposed scheme is able to prevent and detect the occurrence of fibre faults in a network system through centralised monitoring and remotely operate from a central office via Ethernet connection. Even with fibre fault prevention mechanisms, failures will still occur. Therefore fibre fault detection is required in order to detect potential faults and precisely localise the exact failure location. Whenever any failure occurs on the primary entity, the proposed system can protect and switch the failure line to the protection line to ensure that traffic flows continuously. Meanwhile, the failure information will be delivered to field engineers for taking appropriate recovery action to treat the fibre fault and failure link. One suggestion in point-to-multipoint (P2PM) applications has been proposed with the experimental results as the feasibility approach. This approach has bright prospects for improving the survivability and reliability as well as increasing the efficiency and monitoring capabilities in TDM-PON.

Access network survivability: An architecture approach for monitoring, protection and restoration in FTTH application

This paper presented a simple monitoring, protection switching, and fast restoration approach for fiber to the home passive optical network (FTTH-PON) using Access Control System (ACS). ACS is developed for centralized monitoring and failure detection from central office (CO) in downstream direction (from CO towards customer sides). The proposed system architecture incorporating low cost and enable the network service providers and field engineers to remotely control the testing module from anywhere in the world and automatically identify any fiber fault and address the failure location in the fiber field. Another unique function of ACS is to provide the activation for optical switching in a restoration scheme which implemented at the drop region of FTTH-PON. A protection device named Customer Protection Device that comprises of programmable optical switches will be employed at the customer sides, just before the optical network unit, for rerouting the disrupted signals to the protection line when failure occurs in the working line to ensure continuous service delivery to customers.

Application of PIC microcontroller for online monitoring and fiber fault identification

This paper presents an application PIC microcontroller for online monitoring and fiber fault identification in optical fiber communication. For this propose the PIC microcontroller is used control any optical switch connected to it. The proposed system architecture is discussed in detail, considering both the hardware and software elements involved. Finally, the benefits and limitations of such a system are considered, using some initial results obtained in an experimental implementation. The system is developed and tested successfully.

Embedded ethernet microcontroller for optical monitoring

In this paper, we presented the embedded Ethernet microcontroller for optical monitoring. This design is used for fiber monitoring in the FTTH system. The embedded Ethernet microcontroller is used to control the 1x8 optical switches where this switch is to reroute the optical signal in the FTTH system. These systems consisting of two primaries part communicating each other: i)A server consisting of a microcontroller PIC18F97J60 with built-in embedded Ethernet controller module and ii) a client computer. In this system, a microcontroller system is act like web server that store the web pages in their memory, a client computer can access this web page using web browser to monitor and control the microcontroller where the microcontroller is used to control the path of the optical signal by using optical switch.

Optical power budget and cost estimation for Intelligent Fiber-To-the-Home (i-FTTH)

This paper calculates the optical power budget and power margin for designing a conventional passive optical network (PON)-based Fiber-To-the-Home (FTTH) and Intelligent Fiber-To-the-Home (i-FTTH) with different link length of drop fiber and optical power splitting ratio of 1×N passive optical splitter. A simple calculation is used to determine how much loss and power are available for each individual fiber link in both networks with different type of signals. The cost estimation for both networks including the additional optical monitoring, switching, and protection systems are calculated and compared.

Web services for live monitoring in fiber to the home

This paper presents an application PIC microcontroller for web service for live monitoring in fiber to the home (FTTH). We focus on distributed real-time systems, which stand to benefit most from the use of web services technology. For this propose the PIC microcontroller is used control any optical switch connected to it, and send information to web server. It was successfully identified without affecting communication signal transmission, with the specification available a complete system can be made with 24 man-hours. The system will to improve the service reliability and reduce the maintenance cost.

Portable Network Monitoring System for Passive Optical Network (PON)

A real-time optical network monitoring system named Smart Access Network _ Testing, Analyzing and Database (SANTAD) that combined remote controlling, centralized monitoring and troubleshooting, fault detection, optical switching as well as protection and restoration features is introduced for delivering high quality of services (QoS) for passive optical network (PON). The implementation of SANTAD in PON shows its contribution on obtains the high accuracy in detecting any occurrence of fault and addressing the failure location within 30 seconds. The main advantages of this work are to assists the network operators to manage the PON network system more efficiently, reduce hands on workload, minimize network downtime, and rapidly restore failed services when problems are detected and diagnosed.

Web services for monitoring system in optical communication

This paper proposed an application of microcontroller embedded Ethernet to monitoring system in optical communication. We focus on distributed real-time systems, which stand to benefit most from the use of web services technology. For this propose the PIC microcontroller is used control any optical switch connected to it, and send information to internet. It was successfully identified without affecting communication signal transmission, with the specification available a complete system can be made with 24 man-hours. The system will to improve the service reliability and reduce the maintenance cost.

Access Control System: An Architecture Approach for Monitoring, Survivability and Scalability in FTTH-PON Application

This paper highlights on online monitoring, protection switching and fast restoration approach for fiber to the home-passive optical network (FTTH-PON) using Ac- cess Control System (ACS). ACS is developed for downwardly monitoring and failure detection from central office (CO) towards customer premises. ACS also provides activation of switching in the restoration scheme at the drop region of FTTH-PON. Customer protection device (CPD) comprises of programmable optical switches will be employed at the customer premises which stationed just before the ONU to ensure high survivability. We proposed and experimentally demonstrated a new in-line monitoring and testing system with the combination of passive in-line monitoring (PIM) device and Centralized Failure Detection System (CFDS) for transmission surveillance and failure detection without affecting the triple-play service delivery in fiber-to-the-home (FTTH) access network. PIM device is a fully passive device used for optical signals tapping purposes, meanwhile CFDS is a centralized monitoring and troubleshooting solution with graphical user interface (GUI) processing capabilities in MATLAB. ACS contains also a new optical splitting device named MROS for improving the efficiency and scalability of data delivery to the customer premises/ subscribers through optimizing the magnitude power dis- tribute to each line connected to ONU. All this approach has a bright prospect to improve the survivability and reliability as well as increase the efficiency and monitoring capabilities in an optical access network.

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

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.