Patent ID: 6430620
Filing Date: 2002-08-06
Classification: H04L

Abstract:
A stream data transfer system, comprising a server for editing, upon receipt of a request for start of transfer from a client, stream data read out at prescribed send rate from storing means based on the control by a rate controlling means into packet and transferring said data to the client through a network, and a client for receiving the data sent out from the server with packet receiving means and storing said data in a receiving buffer temporarily,in which the server comprises: the rate controlling means for delivering to the packet transmitting means data to be transferred by attaching information indicating the position on the file of that data to the data; and re-transfer controlling means for performing re-transfer of the data corresponding to the lost data based on information indicating the position on the file of that data in correspondence to the state of loss of data received by the packet receiving means of the client and in which the client comprises; re-transfer requesting means for monitoring loss of the data received by said packet receiving means and requesting re-transfer of the data corresponding to the lost data by attaching information indicating the position on the file of that data to the data, said re-transfer requesting means determines a lost data position number corresponding to a lost data element based on position numbers before and after the lost data position number.