An arrangement and a method relating to transmission systems

摘要

The present invention relates to an arrangement and to a method for choosing a route in a hierarchical transmission system that includes a plurality of interconnected nodes. The invention comprises the steps of: generating so-called local routing tables in which routes between nodes on the same hierarchical level are saved; generating so-called global routing tables in which routes between nodes on different hierarchical levels are saved; and choosing a route in said routing tables in response to a request for a connection between a so-called source node and a so-called destination node.