US 11,924,142 B2
Coverage enhancement
Erik Bengtsson, Eslöv (SE); Olof Zander, Södra Sandby (SE); Fredrik Rusek, Eslöv (SE); Kun Zhao, Malmö (SE); and Jose Flordelis, Lund (SE)
Assigned to SONY GOUP CORPORATION, Tokyo (JP)
Appl. No. 17/921,747
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Mar. 31, 2021, PCT No. PCT/EP2021/058415
§ 371(c)(1), (2) Date Oct. 27, 2022,
PCT Pub. No. WO2021/228467, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 2030159-4 (SE), filed on May 14, 2020.
Prior Publication US 2023/0163932 A1, May 25, 2023
Int. Cl. H04W 72/0446 (2023.01); H04L 5/00 (2006.01); H04L 25/02 (2006.01); H04L 27/26 (2006.01); H04W 72/1268 (2023.01)
CPC H04L 5/0094 (2013.01) [H04L 5/0005 (2013.01); H04L 25/0202 (2013.01); H04L 27/261 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of operating a wireless communication device, the method comprising:
receiving at least one downlink control message from a communications network, the at least one downlink control message being indicative of a frequency density of uplink reference signals, the uplink reference signals being for an estimation of a radio channel between the wireless communication device and the communications network to coherently decode data signals encoding data of a uplink data transmission, the uplink reference signals and the data signals using the same precoding,
transmitting the uplink reference signals on the radio channel using a time-frequency resource mapping set in accordance with the frequency density, the time-frequency resource mapping allocating time-frequency resource elements of a plurality of time-frequency resource elements of a time-frequency resource grid of the radio channel to the uplink reference signals, and
suspending said transmitting of the uplink reference signals upon activating a predefined coverage enhancement transmission mode for the uplink data transmission, wherein the predefined coverage enhancement transmission mode is characterized by a code rate of the data below a predefined threshold.