Granted Patent B2

US 12,634,742 · App. 17/625,198 · Granted May 19, 2026

Inventors: Oumer Teyeb (Montréal, CA); Filip Barac (Huddinge, SE); Gunnar Mildh (Sollentuna, SE)

Assignee: Telefonaktiebolaget LM Ericsson (publ)

H04W28/0263H04W28/0215H04W40/12

Abstract

Claims (12)

1 . A method performed by a central unit control plane (CU-CP) of a base station serving as a donor base station in a multi-hop integrated access and backhaul (IAB) network, the method comprising:

determining downlink (DL) mapping information that associates user equipment (UE) traffic flows, identified by quality-of-service (QoS) flow identifiers (IDs), with first-hop DL backhaul radio link control channel (BH RLC) channels of a distributed unit (DU) of the donor base station, for initial mapping by the DU of DL traffic into the multi-hop IAB network;

determining uplink (UL) mapping information that associates first-hop UL BH RLC channels of the DU with the UE traffic flows identified by the QoS flow IDs, for reforming the UE traffic flows from UL traffic incoming to the DU from the multi-hop IAB network; and

configuring the DU of the donor base station to perform DL mapping and UL mapping, based on sending the DL mapping information and the UL mapping information to the DU of the donor base station.

2 . The method of claim 1 , wherein the method includes the CU-CP deciding, with respect to a UE supported by the multi-hop IAB network, whether to use one-to-one mapping for the UE, in which a first-hop DL or UL BH RLC channel is dedicated for the UE.

3 . A base station comprising:

interface and processing circuitry configured for operation as a central unit (CU) of the base station; and

interface and processing circuitry configured for operation as a distributed unit (DU) of the base station;

wherein the CU provides a CU control plane (CU-CP) that, with respect to the base station operating as a donor base station in a multi-hop integrated access and backhaul (IAB) network, is configured to:

determine downlink (DL) mapping information that associates user equipment (UE) traffic flows, identified by quality-of-service (QoS) flow identifiers (IDs), with first-hop DL backhaul radio link control (BH RLC) channels of the DU, for initial mapping by the DU of DL traffic into the multi-hop IAB network;

determine uplink (UL) mapping information that associates first-hop UL BH RLC channels of the DU with the UE traffic flows identified by the QoS flow IDs, for use by the DU in reforming the UE traffic flows from UL traffic incoming to the DU from the multi-hop IAB network; and

configuring the DU to perform DL mapping and UL mapping, based on sending the DL mapping information and the UL mapping information to the DU of the donor base station.

Assignments (1)

Continuity (2)

References Cited (45)