FLOW CONTROL SYSTEM BASED UPON VARIABLE QUEUE LENGTH

摘要

PURPOSE:To use a buffer efficiently and prevent a congestion state when the use rate of the buffer is high by using the rate of a packet exchange not to fixed queue length, but to the number of all connection calls of an unused buffer which is calculated periodically. CONSTITUTION:A switching network does not have a fixed number of buffers previously and queues a buffer memory to update receivable window size 11-1 on the basis of the size of a receiving window 11 as a maximum value by using empty buffers as many as all calls whose number is calculated periodically. When the packet exchange 100 receives a data packet from a call A and the receiving window 11 is open, namely, when the size of the receiving window is =1, the data packet is accepted and the receivable window size 11-1 is decreased by one; when the size 12-1 of the receivable window is =1, the data packet is transmitted without being queued and sendable window size 12-1 is decreased by one.