Patent ID: 6282197
Filing Date: 2001-08-28
Classification: H04L,H04Q

Abstract:
An ATM switching apparatus prepared with a plurality of virtual path connections to a facing node defined as other ATM switching apparatus, said ATM switching apparatus comprising:storage means for storing facing node free bandwidth values and ratios relative to the plurality of respective virtual path connections;calculating means for calculating, when receiving a connection request indicating to set up a connection to the facing node, a necessary bandwidth value defined as a bandwidth value necessary for the connection the basis of bandwidth negotiation data in the connection establishing request;selecting means for selecting, from the plurality of virtual path connections, such a virtual path connection that a result of multiplication of the facing node free bandwidth value and the ratio that are stored in said storage means exceeds the necessary bandwidth value calculated by said calculating means and is most approximate to the necessary bandwidth value;transmitting means for transmitting, to said facing node, a connection establishing request containing information indicating a use of the virtual path connection selected by said selecting means; andratio rewriting means for rewriting, when receiving a rejection message indicating a rejection of acceptance of the connection establishing request transmitted by said transmitting means, a ratio stored in said storage means and relative to the virtual path connection selected by said selecting means into a value obtained by dividing the necessary bandwidth value by the facing node free bandwidth value relative to that virtual path connection.