The congestion control unit, congestion control manner, being the congestion control unit which controls the congestion of the IP network where the session configuration

摘要

PROBLEM TO BE SOLVED: To control congestions generated due to concentration of session establishing requests, in an IP telephone network.;SOLUTION: At the generation of the session establishing request, a session establishing request regulation deciding means 202 checks whether a pair of an outgoing IP telephone terminal address and an incoming IP telephone terminal address of the session establishing request are stored in the session incompletion information storing means 201; when the pair of addresses have been stored, the means checks whether the number of incomplete session establishment of an outgoing IP telephone terminal and an incoming IP telephone terminal is within N-th highest order of the stored number of incomplete; when the number is within the N-th highest order of the number of incomplete, further calculates the ratio of "the number of incomplete session establishing requests/the number of session establishing requests", decides whether this value is larger than a preliminarily given threshold; and when it is larger than the threshold, a session establishment request regulating means 203 refuses the session establishing request.;COPYRIGHT: (C)2005,JPO&NCIPI