US 12,256,434 B2
Configurations for transmitting random access preamble messages
Muhammad Nazmul Islam, Littleton, MA (US); Tao Luo, San Diego, CA (US); Sumeeth Nagaraja, Los Altos, CA (US); Peng Cheng, Beijing (CN); Sundar Subramanian, San Diego, CA (US); and Keiichi Kubota, Tokyo (JP)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Appl. No. 16/634,563
Filed by Qualcomm Incorporated, San Diego, CA (US)
PCT Filed Jul. 10, 2018, PCT No. PCT/CN2018/095138
§ 371(c)(1), (2) Date Jan. 27, 2020,
PCT Pub. No. WO2019/033876, PCT Pub. Date Feb. 21, 2019.
Claims priority of application No. PCT/CN2017/097321 (WO), filed on Aug. 14, 2017.
Prior Publication US 2020/0267770 A1, Aug. 20, 2020
Int. Cl. H04W 4/00 (2018.01); H04W 36/00 (2009.01); H04W 72/044 (2023.01); H04W 74/0833 (2024.01); H04W 76/27 (2018.01); H04W 36/08 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 36/0072 (2013.01); H04W 72/046 (2013.01); H04W 76/27 (2018.02); H04W 36/08 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An apparatus for wireless communication at a user equipment (UE), comprising:
one or more processors;
memory coupled with the one or more processors; and
instructions stored in the memory, the one or more processors configured to:
receive, from a network entity, signaling that indicates a configuration for a repeated transmission of a random access channel (RACH) preamble message before an expiration of a RACH response window during a single RACH transmission occasion, wherein the configuration supports multiple transmissions of the RACH preamble message via a set of dedicated RACH resources comprising a first plurality of symbols, each symbol of the first plurality of symbols associated with a corresponding reception beam of the network entity, the signaling further indicating a threshold quantity of RACH preamble messages for transmission via the set of dedicated RACH resources;
select a set of resources from the set of dedicated RACH resources for transmitting the RACH preamble message based at least in part on the configurationfor the UE;
transmit, in accordance with the threshold quantity of RACH preamble messages for transmission via the set of dedicated RACH resources, a first plurality of signals comprising the RACH preamble message via the selected set of resources using a first plurality of uplink transmit beams before the expiration of the RACH response window;
transmit at least a second signal comprising the RACH preamble message via at least one resource of a periodic set of common RACH resources using at least one uplink transmit beam before the expiration of the RACH response window, wherein the periodic set of common RACH resources comprises a second plurality of symbols, each symbol of the second plurality of symbols associated with a second corresponding reception beam of the network entity; and
receive a RACH response to the RACH preamble message before the expiration of the RACH response window.