Patent ID: 8804526

Claim:
A congestion management apparatus for installation in a data network, said network comprising a server configured to send a Real-time Transport Protocol over a User Datagram Protocol (RTP/UDP) traffic data stream to a client across the data network, said server and said client communicating with one another across the data network by using Real-Time Streaming Protocol (RTSP) control signals including control data for controlling said traffic data stream, the congestion management apparatus being configured to receive said RTP/UDP traffic data stream from the server through the data network and to receive an associated RTSP control signal from the client through the data network, the congestion management apparatus including at least one processor configured to detect an Explicit Congestion Notification (ECN) congestion indicator in said traffic data stream; generate congestion control data, in response to detecting said congestion indicator; select an adaptation method according to a protocol associated with said received RTSP control signal, said congestion control data being generated in accordance with said selected adaptation method; modify the received RTSP control signal by incorporating said congestion control data into said RTSP control signal; and a router sending said modified RTSP control signal incorporating said congestion control data to said server across said data network.