Method of dynamic attribution of an admission control to an Integrated Access and Backhaul node, IAB, disposed in a tree communication architecture between a fixed donor Integrated Access and Backhaul node, IAB-d, and a mobile terminal, UE said method comprising: a. selecting at least one anchor Integrated Access and Backhaul node, IAB-a, among Integrated Access and Backhaul nodes, IAB, of a group in function of the relative position of each node into said architecture, at least one of said nodes of said group and of said terminals being mobile with respect to the others; b. signaling delegation of an admission control from a Central Unit, CU, of said donor Integrated Access and Backhaul node, IAB-d, to the selected at least one anchor Integrated Access and Backhaul node, IAB-a, the signaling step including the following sub-steps: i. transmitting context information from said Central Unit, CU, of said donor Integrated Access and Backhaul node, IAB-d, to the selected at least one anchor Integrated Access and Backhaul node, IAB-a; ii. transmitting identification of said donor Integrated Access and Backhaul node, IAB-d, from said Central Unit, CU, of the said donor Integrated Access and Backhaul node, IAB-d, to the selected at least one anchor Integrated Access and Backhaul node, IAB-a; iii. transmitting identification of said anchor Integrated Access and Backhaul node, IAB-a, from said anchor Integrated Access and Backhaul node, IAB-a, to at least one outbound Integrated Access and Backhaul node, IAB-o, said outbound Integrated Access and Backhaul node, IAB-o, having said anchor Integrated Access and Backhaul node, IAB-a, as a parent node. a. selecting at least one anchor Integrated Access and Backhaul node, IAB-a, among Integrated Access and Backhaul nodes, IAB, of a group in function of the relative position of each node into said architecture, at least one of said nodes of said group and of said terminals being mobile with respect to the others; b. signaling delegation of an admission control from a Central Unit, CU, of said donor Integrated Access and Backhaul node, IAB-d, to the selected at least one anchor Integrated Access and Backhaul node, IAB-a, the signaling step including the following sub-steps: i. transmitting context information from said Central Unit, CU, of said donor Integrated Access and Backhaul node, IAB-d, to the selected at least one anchor Integrated Access and Backhaul node, IAB-a; ii. transmitting identification of said donor Integrated Access and Backhaul node, IAB-d, from said Central Unit, CU, of the said donor Integrated Access and Backhaul node, IAB-d, to the selected at least one anchor Integrated Access and Backhaul node, IAB-a; iii. transmitting identification of said anchor Integrated Access and Backhaul node, IAB-a, from said anchor Integrated Access and Backhaul node, IAB-a, to at least one outbound Integrated Access and Backhaul node, IAB-o, said outbound Integrated Access and Backhaul node, IAB-o, having said anchor Integrated Access and Backhaul node, IAB-a, as a parent node. i. transmitting context information from said Central Unit, CU, of said donor Integrated Access and Backhaul node, IAB-d, to the selected at least one anchor Integrated Access and Backhaul node, IAB-a; ii. transmitting identification of said donor Integrated Access and Backhaul node, IAB-d, from said Central Unit, CU, of the said donor Integrated Access and Backhaul node, IAB-d, to the selected at least one anchor Integrated Access and Backhaul node, IAB-a; iii. transmitting identification of said anchor Integrated Access and Backhaul node, IAB-a, from said anchor Integrated Access and Backhaul node, IAB-a, to at least one outbound Integrated Access and Backhaul node, IAB-o, said outbound Integrated Access and Backhaul node, IAB-o, having said anchor Integrated Access and Backhaul node, IAB-a, as a parent node.