Patent ID: 6359889
Filing Date: 2002-03-19
Classification: H04L

Abstract:
A cell switching device for switching a fixed-length cell, and for controlling a fixed rate connection, comprising:fixed rate bandwidth setting means for setting fixed rate bandwidth information being information about a bandwidth that the fixed rate connection can occupy; use state setting means for setting fixed rate used bandwidth information being information about a bandwidth that the fixed rate connection currently uses; and call controlling means for controlling whether or not to permit establishment of the fixed rate connection while performing an overbooking bandwidth control which permits a bandwidth indicated by the fixed rate used bandwidth information to exceed a bandwidth indicated by the fixed rate bandwidth information, based on the fixed rate bandwidth information set in said fixed rate bandwidth setting means and the fixed rate used bandwidth information set in said use state setting means, when the fixed rate connection is established, and for updating the fixed rate used bandwidth information set in said use state setting means, wherein: said fixed rate bandwidth setting means and said use state setting means are arranged for a corresponding capability part for switching or concentration-multiplexing the cell within the cell switching device; and said call controlling means performs the overbooking bandwidth control for the corresponding capability part while referencing said fixed rate bandwidth setting means and said use state setting means, which are arranged for the corresponding capability part.