US 12,289,615 B2
Methods and apparatuses for providing transmit/receive relative radio alignment verification
George Jöngren, Sundbyberg (SE); and Johan Furuskog, Stockholm (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/757,710
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Dec. 14, 2020, PCT No. PCT/SE2020/051210
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/126055, PCT Pub. Date Jun. 24, 2021.
Claims priority of provisional application 62/949,839, filed on Dec. 18, 2019.
Prior Publication US 2023/0036989 A1, Feb. 2, 2023
Int. Cl. H04L 12/00 (2006.01); H04L 5/00 (2006.01); H04W 16/28 (2009.01); H04W 56/00 (2009.01)
CPC H04W 16/28 (2013.01) [H04L 5/0048 (2013.01); H04W 56/001 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method performed by a network node for determining radio alignment of a full downlink channel and a full uplink channel between a wireless device and a multi-antenna base station comprising a plurality of antennas, the method comprising:
obtaining downlink channel data, wherein the downlink channel data comprises:
estimates of a plurality of downlink channels each associated with a downlink reference signal being received from one of the plurality of antennas at the wireless device, and time synchronization information associated with each of the plurality of downlink channels,
wherein the estimates of the plurality of downlink channels comprises estimates of a plurality of subset vector channels each associated with a different time instance, mi, and estimates of a phase tracking channel at each different time instance, mi, and
wherein the phase tracking channel is associated with a first downlink reference signal always transmitted from a first antenna of the plurality of antennas, and the plurality of subset vector channels is associated with a plurality of cycled downlink reference signals cycled over the plurality of antennas excluding the first antenna over consecutive downlink slots, the plurality of cycled downlink reference signals being fewer than the plurality of antennas excluding the first antenna;
obtaining uplink channel data, wherein the uplink channel data comprises:
estimates of a plurality of uplink channels each associated with an uplink reference signal being received one of the plurality of antennas from the wireless device, and time synchronization information associated with each of the plurality of uplink channels; and
comparing the downlink channel data and the uplink channel data to determine whether the downlink channel and uplink channel between the wireless device and the multi-antenna base station are aligned.