US 11,683,844 B2
Method for receiving, by terminal, downlink signal on basis of random access channel procedure in unlicensed band, and apparatus therefor
Jeongsu Lee, Seoul (KR); Sukhyon Yoon, Seoul (KR); Hyunsoo Ko, Seoul (KR); and Seonwook Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Mar. 9, 2022, as Appl. No. 17/690,707.
Application 17/690,707 is a continuation of application No. PCT/KR2020/006585, filed on May 20, 2020.
Claims priority of application No. 10-2019-0123340 (KR), filed on Oct. 4, 2019.
Prior Publication US 2022/0201763 A1, Jun. 23, 2022
Int. Cl. H04W 74/08 (2009.01); H04W 52/02 (2009.01); H04W 72/14 (2009.01); H04W 74/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 52/0216 (2013.01); H04W 72/14 (2013.01); H04W 74/006 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of receiving a downlink signal based on a random access procedure by a terminal, the method comprising:
transmitting, through a message A, only a physical random access channel (PRACH) preamble, without transmitting both the PRACH and a physical uplink shared channel (PUSCH) in the message A, to a base station;
receiving a random access response (RAR) through a message B from the base station, in response to the message A;
receiving, from the base station, information regarding at least one discontinuous reception (DRX) timer for configuration of DRX operation; and
receiving, from the base station, a downlink signal during an on duration based on the at least one DRX timer,
wherein the PRACH preamble is mapped to a PUSCH occasion for the message A,
wherein a window for detecting the message B starts at least one symbol after a last symbol of the PUSCH occasion corresponding to the PRACH preamble transmission, and
wherein the PUSCH occasion is a valid PUSCH occasion related to the PRACH preamble.