Availability Estimation and Analysis for ADM Equipment and SDH Optical Fiber Ring Networks

• Main Authors: Nien,Ting-hu, 粘丁戶
• Other Authors: B.H. Lee
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/46484087688957459294

碩士 === 國立臺灣科技大學 === 電機工程系 === 92 === Nowadays, communication requirements are changing gradually from traditional voice conversations to multi-media transmission mode with voice conversations, video, and data. In order to provide larger bandwidth and high reliability for customer, synchronous digital hierarchy (SDH) technology is the best choice for high-speed optical fiber backbone transmission network. As a point of view of system network planning and actual operation & maintenance, this article is to approach the reliability estimated for main equipment, an add drop multiplexer (ADM) of SDH network. We would like to compare the influences of the mean time between failure (MTBF) and availability of ADM equipped with/without redundant circuit interface modules and also to analyze that the different results of availability in different combined circuit interface modules and different number of mean time to repair (MTTR) to evaluate availability of maintenance. In addition, the ring topology of SDH network is the most popular for Telecom service provider now and there are two protections switch schemes including multi section shared protection ring (MS-SPRING) and subnetwork connection protection (SNCP). Because different types of fiber cut will affect different kinds of availability of circuits, here, we would like to assume that there are four ADM nodes typically to form a ring topology. Based on the assumption, we investigate how the protection schemes affect the circuit availability, and the result will be reference what are the suitable applications we could use. Finally, we hope these analytic results could be good references for telecom service provider in SDH optical transmission network maintenance improvement