US 12,490,310 B2
Two step random access in non-terrestrial networks
Mohammad Ghadir Khoshkholgh Dashtaki, Burnaby (CA); Ali Cagatay Cirik, Chantilly, VA (US); Esmael Hejazi Dinan, McLean, VA (US); Hyoungsuk Jeon, Centreville, VA (US); Hua Zhou, Vienna, VA (US); and Nazanin Rastegardoost, McLean, VA (US)
Assigned to Ofinno, LLC, Reston, VA (US)
Filed by Ofinno, LLC, Reston, VA (US)
Filed on Jul. 28, 2022, as Appl. No. 17/875,638.
Claims priority of provisional application 63/229,639, filed on Aug. 5, 2021.
Prior Publication US 2023/0043620 A1, Feb. 9, 2023
Int. Cl. H04W 74/0833 (2024.01); H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)
CPC H04W 74/0833 (2013.01) [H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
selecting, by a wireless device and in response to initiating a random access procedure, a first radio resource for transmitting a message, wherein the first radio resource comprises a first physical random access channel (PRACH) occasion and a first physical uplink shared channel (PUSCH) occasion mapped to the first PRACH occasion; and
in response to the first radio resource being invalid for transmission of the message, transmitting, via a second radio resource, the message based on:
the second radio resource being valid for the transmission of the message; and
a time difference between the second radio resource and the first radio resource being less than a threshold, wherein:
the first radio resource is invalid based on the first PRACH occasion being valid and the first PUSCH occasion being invalid; and
the second radio resource comprises a second PRACH occasion and a second PUSCH occasion mapped to the second PRACH occasion.