Performance Analysis of OADM Based Switched Multimegabit Data Service

Abstract

Optical fiber communication systems are being extensively used all over the world for telecommunication, video and data transmission purposes. The demand for transmission over the global telecommunication network will continue to grow at an exponential rate and only fiber optics will be able to meet the challenge. This is because the optical fiber capable of allowing the transmission of many signals over long distances. Switched Multimegabit Data Service (SMDS) is a telecommunications service that provides connectionless, highperformance, packet-switched data transport. Being neither a protocol nor a technology, it supports standard protocols and communications interfaces using current (and future) technology. SMDS allows users to transparently extend their data communications capabilities over a wider geographical area. Since it is a service offered by the telephone companies, SMDS permits this expansion using existing Customer-premises equipment (CPE) and protocols, with minimal investment in dedicated leased lines as the number of line terminations increases. In this thesis, different LAN network and their performance for the success and the failure of the communication have been investigated. Industrial plants use conventional local area networks (LANs) to access a growing number of client/server (C/S) which have a direct impact on organization’s productivity. SMDS has been defined by the IEEE 802.6 Metropolitan Area Network (MAN) standard, as implemented by Bellcore. It can use a variety of technologies, including Broadband ISDN (B-ISDN) and Distributed Queue Dual Bus (DQDB). Current North American implementations utilize DQDB with DS1 (1.5 Mbit/s) or DS3 (44.736 Mbit/s) lines. Other implementations utilize E1 lines at speeds in excess of 1.9 Mbit/s or E3 lines. Future SMDS networks will couple B-ISDN with SONET OC3 at 155.520 Mbit/s. The thesis analyzes the behavior of accepted and drop packets in the OADM (Optical Add/Drop Multiplexer) based SMDS network. OADM decides which packet is to accepted and which is to be dropped. Results analyze the behavior of accepted and drop packets at random time of packets generation in the real time.