US 11,902,926 B2
Downlink (DL) transmission timing of integrated access and backhaul (IAB) node
Honglei Miao, Munich (DE)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/278,211
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Oct. 4, 2019, PCT No. PCT/US2019/054611
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/072851, PCT Pub. Date Apr. 9, 2020.
Claims priority of provisional application 62/742,027, filed on Oct. 5, 2018.
Prior Publication US 2021/0352607 A1, Nov. 11, 2021
Int. Cl. H04W 56/00 (2009.01)
CPC H04W 56/0045 (2013.01) 18 Claims
OG exemplary drawing
 
1. An apparatus comprising:
one or more processors configured to cause a radio access node to:
determine a first reference timing of a first communication connection between the radio access node and a second, parent radio access node; and
determine a second reference timing of a second communication connection between the radio access node and a third, child radio access node;
generate a request for the child radio access node to perform a timing advance adjustment based on the first and second reference timings, so that an uplink receive signal transmitted by the child radio access node arrives at a same time at the radio access node as a downlink receive signal transmitted by the parent radio access node arrives at the radio access node in case of frequency division multiplexed signals; and
apply different analog spatial beamformers for the receive signals transmitted by the parent radio access node and the child radio access node.