US 11,943,807 B2
Two step random access procedure
Renqiu Wang, San Diego, CA (US); Wanshi Chen, San Diego, CA (US); Hao Xu, Beijing (CN); Hung Dinh Ly, San Diego, CA (US); and Heechoon Lee, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Aug. 26, 2021, as Appl. No. 17/458,074.
Application 17/458,074 is a continuation of application No. 16/510,649, filed on Jul. 12, 2019, granted, now 11,122,617.
Application 16/510,649 is a continuation of application No. 15/799,357, filed on Oct. 31, 2017, granted, now 10,405,342, issued on Sep. 3, 2019.
Claims priority of provisional application 62/416,031, filed on Nov. 1, 2016.
Prior Publication US 2021/0392678 A1, Dec. 16, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/00 (2009.01); H04W 74/0833 (2024.01); H04W 84/04 (2009.01)
CPC H04W 74/006 (2013.01) [H04W 74/0833 (2013.01); H04W 84/042 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A base station, comprising:
a transceiver;
a memory; and
one or more processors coupled to the transceiver and the memory, the one or more processors configured to:
receive via the transceiver a first transmission from a user equipment (UE) for a random access procedure using a time-frequency resource, one or more parameters of the time-frequency resource being based on a first predetermined number of bits of a user equipment identity (UE ID) associated with the UE, the first transmission comprising a physical random access channel (PRACH) preamble sequence and a first message including at least a second predetermined number of bits of the UE ID;
determine a temporary identifier associated with the UE based on the second predetermined number of bits of the UE ID and the one or more parameters of the time-frequency resource used to receive at least the PRACH preamble sequence;
detect the PRACH preamble sequence;
decode the first message; and
in response to successfully detecting the PRACH preamble sequence and decoding the first message of the first transmission, transmit via the transceiver a second transmission including:
information on a physical downlink control channel (PDCCH) addressed to the temporary identifier associated with UE, and
a second message on a physical downlink shared channel (PDSCH) associated with the PDCCH,
wherein the second message on the PDSCH comprises at least one of an indication confirming the PRACH preamble sequence, a timing advance value, a back-off indicator, a contention resolution message, a transmit power control (TPC) command, an uplink resource grant, or a downlink resource grant, specific to the UE.