US 12,127,270 B2
Recovery/fallback after unsuccessful 2-step random access attempt
Johan Rune, Lidingö (SE); and Icaro Leonardo Da Silva, Solna (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/617,707
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jun. 9, 2020, PCT No. PCT/EP2020/065934
§ 371(c)(1), (2) Date Dec. 9, 2021,
PCT Pub. No. WO2020/249548, PCT Pub. Date Dec. 17, 2020.
Claims priority of provisional application 62/859,365, filed on Jun. 10, 2019.
Prior Publication US 2022/0240326 A1, Jul. 28, 2022
Int. Cl. H04W 74/08 (2024.01); H04W 56/00 (2009.01); H04W 72/044 (2023.01); H04W 74/0833 (2024.01)
CPC H04W 74/0841 (2013.01) [H04W 56/001 (2013.01); H04W 72/046 (2013.01); H04W 74/0866 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A wireless device configured to communicate with a network node, the wireless device comprising:
processing circuitry configured to:
trigger a random access (RA) process;
select a first beam for the RA process, the selected first beam being associated with a two-step RA configuration, a characteristic of the selected first beam being determined to meet a predefined threshold;
perform a two-step RA process associated with the two-step RA configuration using the selected first beam;
determine that a step of the two-step RA process has failed; and
in response to determining the step of the two-step RA process has failed, retransmit an uplink shared channel portion of a message A, msgA, of the two-step RA process as an uplink shared channel message in a four step RA process.