US 12,395,871 B2
Beam management for frequency division duplex operation
Jose Flordelis, Lund (SE); Fredrik Rusek, Eslöv (SE); Olof Zander, Södra Sandby (SE); Kun Zhao, Malmö (SE); and Erik Bengtsson, Eslöv (SE)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 17/758,349
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Jan. 14, 2021, PCT No. PCT/EP2021/050667
§ 371(c)(1), (2) Date Jul. 1, 2022,
PCT Pub. No. WO2021/144352, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 2030010-9 (SE), filed on Jan. 14, 2020.
Prior Publication US 2023/0069193 A1, Mar. 2, 2023
Int. Cl. H04W 24/08 (2009.01); H04L 5/00 (2006.01); H04L 5/14 (2006.01); H04W 74/0833 (2024.01)
CPC H04W 24/08 (2013.01) [H04L 5/0051 (2013.01); H04L 5/14 (2013.01); H04W 74/0841 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of operating a wireless communication device configured to communicate with a communications network using frequency duplex transmission in an uplink frequency band and in a downlink frequency band, the method comprising:
monitoring for first downlink reference signals transmitted by an access node of the communications network in the uplink frequency band and using multiple first downlink transmit beams, and
monitoring for second downlink reference signals transmitted by the access node of the communications network in the downlink frequency band and using multiple second downlink transmit beams, wherein the second downlink reference signals are transmitted using the multiple second downlink transmit beams being associated with multiple random-access occasions, and
wherein the method further comprising:
selecting a random-access occasion from the multiple random-access occasions based on said monitoring of the first downlink reference signals, and
transmitting, in the uplink frequency band, a random-access message to the communications network in the selected random-access occasion.