Data Bases and Their Management for DSL Design Studies

Abstract

The performance evaluation of the high-speed digital subscriber line (HDSL) depends upon the design, linkages, and cooperative role of the extensive data bases during simulation studies. Such data bases are necessary during component design, performance evaluation and the overall feasibility studies of the HDSL at the basic data rate (144 kbps) or at the primary data rate (1.544 Mbps in the United States and 2.048 Mbps in Europe). In this Chapter, the design and procedures to build these interoperable data bases are presented. The need, consistency and interdependence of the data bases that actually supply the simulation programs are presented. The input data to the simulation programs is derived from large national Loop Surveys, the cable characteristics and surveys of noise in the loop plant. The output of the simulation programs generates interdependent and consistent data bases that are essential to evaluate the overall performance of the entire subscriber Loop Survey population at various rates (such as 144, 384, 768 kbps, 1.544 and 2.048 Mbps) in different telecommunication networks of various countries, regions, or even in premises distribution systems. In this Chapter, the success and frustrations in organizing and working with such interdependent and interoperable data bases are also presented.