US 12,336,013 B2
Four-step to two-step random access procedure
Hyoungsuk Jeon, Centreville, VA (US); Esmael Hejazi Dinan, McLean, VA (US); Hua Zhou, Vienna, VA (US); Kai Xu, Great Falls, VA (US); Alireza Babaei, Fairfax, VA (US); Kyungmin Park, Vienna, VA (US); and Ali Cagatay Cirik, Chantilly, VA (US)
Assigned to Ofinno, LLC, Reston, VA (US)
Filed by Ofinno, LLC, Reston, VA (US)
Filed on Aug. 17, 2023, as Appl. No. 18/234,957.
Application 18/234,957 is a continuation of application No. 17/665,187, filed on Feb. 4, 2022, granted, now 11,737,149.
Application 17/665,187 is a continuation of application No. 16/584,073, filed on Sep. 26, 2019, granted, now 11,259,331, issued on Feb. 22, 2022.
Claims priority of provisional application 62/737,849, filed on Sep. 27, 2018.
Prior Publication US 2023/0397257 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0833 (2024.01); H04W 56/00 (2009.01); H04W 72/23 (2023.01); H04W 74/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 56/005 (2013.01); H04W 72/23 (2023.01); H04W 74/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive, based on transmitting a first random access preamble, a medium access control (MAC) packet data unit (PDU) comprising a first MAC sub-PDU and a second MAC sub-PDU, wherein:
the first MAC sub-PDU comprises a first random access response (RAR) having a first format for two-step random access; and
the second MAC sub-PDU comprises:
a subheader indicating that a second RAR has a second format for Msg3 transmission; and
the second RAR comprising a first uplink grant;
transmit, via the first uplink grant, a Msg3 comprising a wireless device identifier of the wireless device; and
based on not receiving a response to the Msg3, perform a two-step random access procedure comprising a transmission of a first message, of the two-step random access procedure, wherein the first message comprises:
a second random access preamble; and
a transport block.