Patent ID: 6181700
Filing Date: 2001-01-30
Classification: H04L,H04Q

Abstract:
A data transfer device for establishing data communication through an ATM network, comprising:a connection setting portion operable to set a logical connection on the ATM network;a protocol processing portion operable to perform protocol processing having a procedure for selective retransmission on said logical connection;a parameter table operable to store a plurality of protocol parameters required for the protocol processing in said protocol processing portion and a parameter MaxPD for defining a transmission interval of delivery confirmation packets as one of said plurality of protocol parameters;a parameter changing portion operable to chance the contents of settings of the protocol parameters stored in said parameter table depending on a communication state, and to change said parameter MaxPD;wherein said parameter changing portion is operable to change said parameter MaxPD in accordance with the number of data packets transferred at one time on said logical connection and to change said parameter MaxPD in accordance with a number of data packets, into which data to be transferred is divided or which are designated to be transferred at one time, so as to deliver a confirmation packet immediately after the last data packet is transferred.