US 12,452,887 B2
Random access channel (RACH) coverage enhancement
Reza Kalbasi, San Diego, CA (US)
Filed by Parsa Wireless Communications LLC, Stamford, CT (US)
Filed on Mar. 29, 2023, as Appl. No. 18/127,746.
Claims priority of provisional application 63/340,974, filed on May 12, 2022.
Prior Publication US 2023/0371047 A1, Nov. 16, 2023
Int. Cl. H04W 72/30 (2023.01); H04W 72/044 (2023.01); H04W 72/1268 (2023.01); H04W 74/0833 (2024.01)
CPC H04W 72/30 (2023.01) [H04W 72/046 (2013.01); H04W 72/1268 (2013.01); H04W 74/0833 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of random access channel (RACH) procedure at a user equipment (UE), comprising the steps of:
transmitting a first message including a random preamble selected from a set of preambles to a base station (BS);
receiving a second message including control information required for establishing communication between the UE and the BS in one or more physical downlink control channels (PDCCHs) in a first time duration;
determining one PDCCH in the one or more PDCCHs which has the highest received signal power (RSRP);
in a third message reporting the one PDCCH with the highest RSRP to the base station and transmitting uplink scheduling information in one or more physical uplink shared channels (PUSCHs) in a second time duration; and
receiving a fourth message, the fourth message includes a contention resolution process and a report indicating the one PUSCH with the highest RSRP.