Section: 8.9.9.2 BH RLC Channel Mapping on BAP Layer
Content: When traffic is forwarded on BAP layer as described in TS 38.300[ NR; NR and NG-RAN Overall description; Stage-2 ]  [2], the IAB-node performs the BH RLC channel mapping as defined in TS 38.340[ NR; Backhaul Adaptation Protocol (BAP) specification ]  [22]. The BH RLC channel mapping information is configured by the IAB-donor-CU. The BH RLC channel mappings can be configured as part of the UE Context Setup or UE Context Modification procedures. They may also be configured via the non-UE-associated BAP Configuration procedure. NOTE: Implementation must ensure the avoidance of potential race conditions, i.e. that no conflicting configurations are concurrently performed using UE-associated and non-UE-associated procedures.