Patent ID: 6414937
Filing Date: 2002-07-02
Classification: H04L

Abstract:
A self healing method of an ABR communication service, for maintaining a cell transfer when a failure occurs in a path through which the cell transfer is performed from a source terminal to a destination terminal at a variable cell sending rate, by assuring a frequency band for the cell transfer in a bypass route different from said path and switching said path to a bypass route, said self healing method comprising the step of:fixing upper limits of cell sending rate at source terminals in said path and said bypass route by setting contents of ER fields of BRM cells to be transferred to said respective source terminals to values of the sending rate of said respective source terminals at the time when the frequency band is assured in the bypass route, during the time period when the frequency band is assured in said bypass route to the time when the switching from said path to said bypass route is completed, by an ATM cell switch device which performs the path switching and an ATM cell switch device on said bypass route; and setting the sending rates of said respective source terminals according to the contents of said ER fields of said received BRM cells by said respective source terminals themselves.