Explicit Congestion Notification Marking of User Traffic

A method performed by a sending radio network node for supporting Explicit Congestion Notification (ECN) marking of user traffic in a wireless communication network, wherein said method comprises the steps of:

• monitoring a congestion metric on a data radio bearer;
• and
• transmitting control information indicating traffic congestion on said data radio bearer, based on said congestion metric, to a receiving radio network node.

A method performed by a receiving radio network node for Explicit Congestion Notification (ECN) marking of user traffic in a wireless communication network, wherein said method comprises the steps of:

• receiving control information indicating traffic congestion on a data radio bearer, based on a congestion metric, from a sending radio network node;
• and
• marking a next ECN-capable user packet of said user traffic on said data radio bearer with ECN marking, based on said control information.

A sending radio network node configured to support Explicit Congestion Notification (ECN) marking of user traffic in a wireless communication network, the sending radio network node comprising:

• a processor and a memory, said memory comprising instructions executable by the processor, whereby the processor is configured to monitor a congestion metric on a data radio bearer;
• and
• communication circuitry configured to transmit control information indicating traffic congestion on said data radio bearer, based on said congestion metric, to a receiving radio network node.

A non-transitory computer-readable medium comprising, stored thereupon, a computer program comprising instructions that, when executed by at least one processor of a sending radio network node, cause the at least one processor to:

• monitor a congestion metric on a data radio bearer;
• and
• prepare control information indicating traffic congestion on said data radio bearer, based on said congestion metric, for transmitting to a receiving radio network node.

A receiving radio network node configured to mark user traffic in a wireless communication network with Explicit Congestion Notification (ECN) marking, wherein said receiving radio network node comprises:

• communication circuitry configured to receive control information indicating traffic congestion on a data radio bearer, based on a congestion metric, from a sending radio network node;
• and
• a processor and a memory, said memory comprising instructions executable by the processor, whereby the processor is operative to mark a next ECN-capable user packet of said user traffic on said data radio bearer with ECN marking, based on said control information.