US 12,256,439 B2
Method and apparatus for random access procedure
Zhipeng Lin, Nanjing (CN); Jan Christoffersson, Luleå (SE); and Robert Mark Harrison, Grapevine, TX (US)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/625,377
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jun. 30, 2020, PCT No. PCT/CN2020/099388
§ 371(c)(1), (2) Date Jan. 7, 2022,
PCT Pub. No. WO2021/004337, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. PCT/CN2019/095313 (WO), filed on Jul. 9, 2019.
Prior Publication US 2022/0256610 A1, Aug. 11, 2022
Int. Cl. H04W 74/08 (2024.01); H04W 74/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) [H04W 74/004 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method at a user equipment (UE), comprising:
selecting a synchronization signal and physical broadcast channel block (SSB) with a signal measured metric satisfying a criterion;
transmitting a first message including a random access channel (RACH) preamble on a RACH occasion and data on an uplink shared channel (USCH) to a base station, wherein the RACH preamble and the RACH occasion are selected based on a mapping of the SSB to the RACH preamble and the RACH occasion; and
receiving a second message from the base station as a response to the first message,
wherein the second message is a multiplexed response comprising a respective response to the first message of the UE, and another response to at least one other UE,
wherein a Radio Network Temporary Identifier (RNTI) for the second message is one of:
a common RNTI of the UE and the at least one other UE;
a UE-specific RNTI with a higher priority between the UE and the at least one other UE;
a UE-specific RNTI randomly selected from UE specific RNTI of the UE and at least one other's UE's UE specific RNTI; and
a UE-specific RNTI determined based on a measurement on uplink signals from the UE and the at least one other UE or a measurement by the UE and the at least one other UE on downlink signals.