US Patent No. 10,893,550


Patent No. 10,893,550
Issue Date January 12, 2021
Title Numerology Dependent Random Access Timing
Inventorship Muhammad Nazmul Islam, Edison, NJ (US)
Tao Luo, San Diego, CA (US)
Sony Akkarakaran, Poway, CA (US)
Hung Ly, San Diego, CA (US)
Bilal Sadiq, Basking Ridge, NJ (US)
Assignee QUALCOMM Incorporated, San Diego, CA (US)

Claim of US Patent No. 10,893,550

1. A method for wireless communications, comprising:identifying that a random access channel (RACH) procedure is to be performed;
receiving, at a user equipment (UE), an indication of a subcarrier spacing to be used for the RACH procedure; and
determining, based at least in part on the subcarrier spacing, a number of symbols that the UE is to wait between a last symbol of a random access response (RAR) window in which no RAR is received and a retransmission of a RACH message
receiving, an RAR
transmitting a Message 3 response after a time interval, the time interval being a numerological maximum of the time values, including a minimum time gap T, represented in absolute time, and the output N of Equation 1 as follows:
where Ni is representative of the smaller of the tone spacing between Msg2 and Msg3 and S represents a fixed number of symbols.