US 12,127,271 B2
PUSCH resource selection in 2-step random access
Henrik Enbuske, Stockholm (SE); Jan Christoffersson, Luleå (SE); Zhipeng Lin, Nanjing Jiangsu (CN); Johan Rune, Lidingö (SE); Robert Mark Harrison, Grapevine, TX (US); and Jonas Sedin, Sollentuna (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/629,950
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jul. 13, 2020, PCT No. PCT/SE2020/050730
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/029803, PCT Pub. Date Feb. 18, 2021.
Claims priority of provisional application 62/886,754, filed on Aug. 14, 2019.
Prior Publication US 2022/0264659 A1, Aug. 18, 2022
Int. Cl. H04W 74/0833 (2024.01); H04B 17/318 (2015.01); H04L 1/00 (2006.01); H04W 72/0446 (2023.01); H04W 72/0453 (2023.01); H04W 74/00 (2009.01); H04W 74/08 (2009.01)
CPC H04W 74/0841 (2013.01) [H04B 17/318 (2015.01); H04L 1/0003 (2013.01); H04W 72/0446 (2013.01); H04W 72/0453 (2013.01); H04W 74/002 (2013.01); H04W 74/0866 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method implemented in a wireless device for selecting resources for a two-step random access (RA) procedure, the method comprising:
receiving a two-step RA configuration for a cell from a network node, the two-step RA configuration comprising: a first resource allocation for a physical uplink shared channel (PUSCH) transmission of a first message (msgA) of the two-step RA procedure, the first resource allocation for the PUSCH transmission of the msgA being associated with a first set of preambles; and a second resource allocation for the PUSCH transmission of the msgA associated with a second set of preambles;
selecting at least one beam from among a plurality of beams in the cell;
determining that the selected beam is associated with the two-step RA configuration; and
selecting, based on the two-step RA configuration being associated with the selected beam, one of the first and second resource allocation and the associated one of the first and second set of preambles, selecting one of the first and second resource allocation and the associated one of the first and second set of preambles comprising:
selecting the second resource allocation and associated second set of preambles when a payload size of the PUSCH transmission of the msgA is greater than a size threshold value and an estimated downlink pathloss is less than a pathloss threshold value; and
selecting the first resource allocation and associated first set of preambles otherwise; and
transmitting the PUSCH transmission of the msgA using the selected one of the first and second resource allocation.