US 11,877,165 B2
Using alternative paths of descendant nodes for backhaul-link failure reporting in integrated access
Ajmal Muhammad, Sollentuna (SE); Oumer Teyeb, Montréal (CA); and Gunnar Mildh, Sollentuna (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/430,532
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Feb. 12, 2020, PCT No. PCT/EP2020/053641
§ 371(c)(1), (2) Date Aug. 12, 2021,
PCT Pub. No. WO2020/165278, PCT Pub. Date Aug. 20, 2020.
Claims priority of provisional application 62/805,015, filed on Feb. 13, 2019.
Prior Publication US 2022/0132337 A1, Apr. 28, 2022
Int. Cl. H04W 24/04 (2009.01); H04W 76/19 (2018.01); H04W 40/34 (2009.01); H04L 45/02 (2022.01)
CPC H04W 24/04 (2013.01) [H04W 40/34 (2013.01); H04W 76/19 (2018.02); H04L 45/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A child integrated access backhaul (IAB) node configured to communicate with a first parent IAB node and a descendant IAB node over a backhaul network, the child IAB node comprising:
processing circuitry configured to:
detect a backhaul link failure between the child IAB node and the first parent IAB node;
in response to the detected backhaul link failure, cause transmission of a radio link failure indication to the descendant IAB node, the radio link failure indication being configured to cause each descendant IAB node in an established communication path receiving the radio link failure indication to modify data transmission and remain on the established communication path to the child IAB node;
receive signaling indicating for the child IAB node to connect to a second parent IAB node; and
modify network topology at least in part by connecting to the second parent IAB node.