Transmission of information relating to a quality of service

A device comprising:

• a processor configured to,
• assemble a real time streaming protocol message, the real time streaming protocol message comprising one or more of a SETUP message, a SET_PARAMETER message, an OPTIONS message and a PLAY message, and
• attach information relating to a quality of service to a header of said real time streaming protocol message, wherein said information relating to the quality of service comprises one or more of
• a metric associated to an achieved quality of service which is to be reported by the device, and
• information indicating a reporting frequency which is to be used by the device for reporting the achieved quality of service;
• and
• a transmitter configured to,
• transmit said real time streaming protocol message.

A method comprising at a first device:

• assembling a real time streaming protocol message, the real time streaming protocol message comprising one or more of a SETUP message, a SET_PARAMETER message, an OPTIONS message and a PLAY message;
• attaching information relating to a quality of service to a header of said real time streaming protocol message, wherein said information relating to the quality of service comprises one or more of
• a metric associated to an achieved quality of service which is to be reported by the first device to a second device, and
• information indicating a reporting frequency which is to be used by the first device for reporting the achieved quality of service to the second device;
• and
• transmitting said real time streaming protocol message to the second device.