Patent ID: 11956665
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method of operation in a wireless communications network, the method comprising:
at a first Integrated Access and wireless access Backhaul (IAB) node:
for first traffic flows that target first User Equipments (UEs) served by the first IAB node, transmitting the first traffic flows to the first UEs and, in a case where there are one or more upstream IAB nodes forwarding the first traffic flows from a donor IAB node, transmitting congestion reports for the first traffic flows towards the donor IAB node, based on per-node congestion marking applied by the one or more upstream IAB nodes in response to each such upstream IAB node detecting excess delays associated with next-hop forwarding of the first traffic flows; and
for second traffic flows for which the first IAB node acts as an upstream IAB node forwarding the second traffic flows towards one or more downstream IAB nodes that serve second UEs targeted by the second traffic flows, preserving any congestion marking contained in data packets of the second traffic flows, while adding own-node congestion marking to the same or other data packets of the second traffic flows, responsive to detecting excess delays associated with next-hop forwarding of the second traffic flows by the first IAB node; and

at the donor IAB node:
performing traffic flow control for the first traffic flows and the second traffic flows, responsive to the congestion reports received from respective ones of the serving IAB nodes.