Patent ID: 6104698
Filing Date: 2000-08-15
Classification: H04L

Abstract:
An Asynchronous Transfer Mode (ATM), exchange system for receiving a plurality of calls each having different required communication quality, the system comprising:a buffer for each of a plurality of respective bandwidth demand classes that have been defined according to the required communication quality, each buffer storing call cells belonging to one of said respective bandwidth demand classes;a counter for each of said respective bandwidth demand classes;call reception control means for setting in each counter a guaranteed bandwidth represented by a number of cells per certain time interval required to be output to an output channel for assuring the communication quality of each of said respective bandwidth demand classes at said certain time interval; andpriority control means for outputting cells to said output channel, said cells being stored in said buffer corresponding to one of said bandwidth demand classes, said counter corresponding to said one of said bandwidth demand classes containing a value not set to zero (0), said priority control means further subtracting one (1) from said value set in said counter of said one of said bandwidth demand classes that has output cells and said priority control means further outputting cells stored in said buffer corresponding to another of said bandwidth demand classes having a corresponding counter containing a value of zero (0).