A client's terminal 102 carries out the control of data transmission to a server apparatus 101 depending upon a data transmission program involving data transmission control information provided by the server apparatus 101. The server apparatus 101 transmits also a control-information update message...http://www.google.de/patents/US20020199183?utm_source=gb-gplus-sharePatent US20020199183 - Two-way communicating method and system and information processing apparatus