Network system and topology map generating method

摘要

A network system that is able to automatically generate a topology map. A PON topology generation part of a network system with a predetermined network including an OLT and a plurality of ONUs performs a topology map generation process. The topology map generation process includes: (a) calculating a plurality of numbers Nci of 2-branches that are the numbers of 2-branches of splitters on a transmission path between the OLT and the plurality of ONUs, based on a plurality of transmission distances Li, a plurality of downstream transmission power values PT and a plurality of downstream reception power values PRi; and (b) generating a topology map based on the plurality of numbers Nci of 2-branches and the plurality of transmission distances Li.