HYBRID CONGESTION CONTROL

摘要

A multi-mode congestion control is employed in a transport network (9) interconnecting a radio access node (4) and a control node (5) of a communication network (1). The transport network (9) employs a window-based state providing a window-based congestion control mode for a data flow. This mode involves notifying an application level transport protocol implemented in a sending source (7, 8) of the communication network (1) of any detected congestion event. If a congestion event in the transport network (9) is detected a switch to a rate-based state is performed. The rate-based state provides a rate-based congestion control mode involving transmitting a rate-reducing message from the radio access node (4) to the control node (5) to trigger a reduction in the bitrate of the data flow in response to the detected congestion event.