FLEXIBLE DATA RATE CHANGE IN A MOBILE NETWORK

摘要

The present invention discloses a network system, in which data is transmitted in form of transmission frames, comprising a network control unit (4) for controlling communication in the network; and a terminal (2) for receiving and transmitting data from/to said network control unit (4); wherein said network control unit (4) is adapted to receive a request for changing a data rate from a first user data rate to a second user data rate, said network control unit (4) adds/deletes fill data (FD) to/from a transmission frame corresponding to the requested change of data rate for transmitting data to said terminal (2) at said second data rate; and said terminal (2) is adapted to detect the change in the amount of fill data (FD) and to change the user data rate for transmitting data to said network control unit (4) according to the detected change. In this system, it is possible to smoothly change the data rate without affecting the quality of service.