Method and system for transferring data to improve responsiveness when sending large data sets

A method of increasing responsiveness of a server comprising the steps of:

• (i) determining a minimum difference (dmin) given by a minimum time for a first response with an embedded first time stamp message sent from a sever to a client and returned from the client to the server;
• (ii) receiving at the server a request for an image data file over a network from the client using an internet protocol connection;
• (iii) sending from the server to the client a second response to the request and embedding a second timestamp at a first time (t1);
• (iv) receiving from the client at a second time (t2) the second response containing the first timestamp;
• (v) determining a difference (d) given by t2 less t1;
• (vi) calculating an extra travel time (e) given by d less dmin;
• and
• (vii) if e is greater than approximately 50 msec, then reducing a send bandwidth (bsend) to blimit, where blimit is a bandwidth limit on the server.

A method of increasing responsiveness of a server comprising the steps of:

• (i) receiving at a server a first request for a first image data file over a network from a client using an internet protocol connection;
• (ii) sending from the server to the client a first response to the first request comprising a first timestamp at a first time (t1);
• (iii) receiving at the server at a second time (t2) the first timestamp returned from the client;
• (iv) determining a first difference (d1) given by t2 less t1;
• (v) receiving at the server a second request for a second image data file over the network from the client using the internet protocol connection;
• (vi) sending from the server to the client a second response to the second request comprising a second timestamp at a third time (t3);
• (vii) receiving at the server at a fourth time (t4) the second timestamp returned from the client;
• (viii) determining a second difference (d2) given by t4 less t3;
• (ix) calculating an extra travel time (e) given by d2 less d1;
• and
• (x) if e is greater than approximately 40 msec, then reducing a send bandwidth (bsend) to reduce network delay.