US 12,457,636 B2
Methods, base station and terminal device for two-step random access procedure
Zhipeng Lin, Nanjing (CN); Robert Mark Harrison, Grapevine, TX (US); and Asbjörn Grövlen, Stockholm (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/419,673
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Aug. 16, 2019, PCT No. PCT/CN2019/101097
§ 371(c)(1), (2) Date Jun. 29, 2021,
PCT Pub. No. WO2020/134121, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. PCT/CN2018/125611 (WO), filed on Dec. 29, 2018.
Prior Publication US 2023/0096520 A1, Mar. 30, 2023
Int. Cl. H04W 74/00 (2009.01); H04L 5/00 (2006.01); H04W 74/0833 (2024.01); H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)
CPC H04W 74/006 (2013.01) [H04L 5/0094 (2013.01); H04W 74/0836 (2024.01); H04W 74/0833 (2013.01); H04W 74/0838 (2024.01)] 4 Claims
OG exemplary drawing
 
1. A method in a base station, comprising:
transmitting, to a terminal device through an air interface, a first message having a first parameter indicating a subcarrier spacing (SCS) of a preamble and a second parameter indicating a SCS of a physical uplink shared channel (PUSCH), wherein the first and second parameters are used by the terminal device for transmitting message A in a two-step random access procedure, wherein the first message is a radio resource control (RRC) message or a system information block type 1 (SIB1) message, and wherein the SCS of the PUSCH is same as an SCS used for message 3 in a four-step random access procedure; and
receiving, from the terminal device through the air interface in the two-step random access procedure, the message A based on the SCS of the preamble and the SCS of the PUSCH transmitted in the first message.