Method and nodes for congestion notification

A node of a transmission network for handling a data transmission from a sender to a receiver, said data transmission involving passing data packets from said sender to said receiver via said node and a further node between said sender and receiver, said data packets passing from said node to said further node towards said receiver, where said node comprises a controller configured to:

• receive a message from said further node relating to a decision on whether to notify said receiver of a congestion condition in said data transmission, and
• send an explicit congestion notification towards said receiver if it is decided to notify said receiver of said congestion condition, wherein said sending comprises sending the explicit congestion notification from said node in a control message to said further node, said control message being distinguishable from user plane messages, the further node being configured to forward said explicit congestion notification to said receiver according to a low delay transmission procedure that provides lower delays towards said receiver than experienced by user plane traffic.

A method for controlling a node of a transmission network for handling a data transmission from a sender to a receiver, said data transmission involving passing data packets from said sender to said receiver via said node and a further node between said sender and receiver, said data packets passing from said node to said further node towards said receiver, the method comprising:

• receiving a message from said further node relating to a decision on whether to notify said receiver of a congestion condition in said data transmission, and
• sending an explicit congestion notification towards said receiver if it is decided to notify said receiver of said congestion condition, wherein said sending comprises sending the explicit congestion notification from said node in a control message to said further node, said control message being distinguishable from user plane messages, the further node being configured to forward said explicit congestion notification to said receiver according to a low delay transmission procedure that provides lower delays towards said receiver than experienced by user plane traffic.

A computer program product stored on a non-transitory computer readable medium and comprising computer code parts configured to, when loaded into and executed on a programmable node of a communication network, control a node of a transmission network for handling a data transmission from a sender to a receiver, said data transmission involving passing data packets from said sender to said receiver via said node and a further node between said sender and receiver, said data packets passing from said node to said further node towards said receiver, by:

• receiving a message from said further node relating to a decision on whether to notify said receiver of a congestion condition in said data transmission, and
• sending an explicit congestion notification towards said receiver if it is decided to notify said receiver of said congestion condition, wherein said sending comprises sending the explicit congestion notification from said node in a control message to said further node, said control message being distinguishable from user plane messages, the further node being configured to forward said explicit congestion notification to said receiver according to a low delay transmission procedure that provides lower delays towards said receiver than experienced by user plane traffic.