Abstract
Timely detection of Dense Wavelength Division Multiplexing (DWDM) link quality and service performance problems of fiber deployment are important and critical for telecommunication operators. In this paper, we propose a new methodology for network fault detection inside optical transmission systems deployed in a real-operator environment and present the working principles of the system. Our new calculation methodology is used for joint fiber and DWDM link quality evaluation inside the proposed High-level Unified BackBone Link Examiner (HUBBLE) platform. At the end of the paper, we also detail some of the benefits, challenges, and opportunities of automation in DWDM networks using the proposed HUBBLE platform
Highlights
The target of optical transmission systems is to carry all the payload wrapped transparently in containers with minimum loss and latency while providing maximum capacity
Our main contributions in this paper can be summarized as follows: (i) We propose a new architecture specific to telecommunication operators that can collect fiber and Dense Wavelength Division Multiplexing (DWDM) related parameters from multiple vendors, perform analysis, and visualize the fiber and DWDM alarm severity levels. (ii) We develop new metrics and methodologies that score jointly both the fiber link quality and DWDM link using the measurements collected from various Network Equipment (NE) instead of adhering to the attenuation values given by the fiber optic cable standards of manufacturers. (iii) We provide benefits, challenges, and opportunities of automation of DWDM networks experienced using the High-level Unified BackBone Link Examiner (HUBBLE) platform
Even if the fiber attenuation difference and fiber km loss are in the green region, if the fiber deviation from expected attenuation value is in the red region, we mark this fiber as critical
Summary
The target of optical transmission systems is to carry all the payload wrapped transparently in containers with minimum loss and latency while providing maximum capacity. For reliable and seamless connection, measuring the quality level of fiber cables is quite important for the operation of DWDM systems. Too much switching is not preferred and determining the root cause of the problem with ASON systems and Network Management System (NMS) becomes difficult Network performance measurements such as Bit Error Rate (BER) and Forward Error Correction (FEC) measurements should be checked properly. The importance of fault management and repair time for the optical links to provide enhancement for reliable transmission and increments in power savings of 5G transport networks. A method and system for monitoring/supervising optical fault management for fibers and their connection points in certain Network Equipment (NE) to resolve and detect some of the problems based on OTDR measurements is presented in [19]. An approach for access links with OTDR testing is described in [23]
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