US 11,743,831 B2
Method for performing random-access channel procedure in unlicensed band, and device therefor
Jeongsu Lee, Seoul (KR); Sukhyon Yoon, Seoul (KR); Hyunsoo Ko, Seoul (KR); Suckchel Yang, Seoul (KR); Seonwook Kim, Seoul (KR); Youngdae Lee, Seoul (KR); and Seokmin Shin, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Mar. 16, 2022, as Appl. No. 17/696,254.
Application 17/696,254 is a continuation of application No. PCT/KR2020/013070, filed on Sep. 25, 2020.
Claims priority of application No. 10-2019-0118399 (KR), filed on Sep. 25, 2019; and application No. 10-2019-0120135 (KR), filed on Sep. 27, 2019.
Prior Publication US 2022/0217641 A1, Jul. 7, 2022
Int. Cl. H04W 4/00 (2018.01); H04W 52/06 (2009.01); H04W 74/08 (2009.01)
CPC H04W 52/06 (2013.01) [H04W 74/0808 (2013.01); H04W 74/0833 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of performing a Random Access Channel (RACH) procedure on an unlicensed band by a user equipment (UE), the method comprising:
transmitting, to a base station (BS), a message A including a Physical Random Access Channel (PRACH) and a Physical Uplink Shared Channel (PUSCH); and
receiving, from the BS, a message B related to contention resolution in response to the message A,
wherein, based on that the PRACH and the PUSCH are transmitted consecutively, a value of a power ramping counter for configuring a transmission power of the message A increases based on that a transmission spatial beam for the PRACH is same as a transmission spatial beam for a previous PRACH,
wherein, based on that there is a time gap between the PRACH and the PUSCH, a power ramping counter for the PRACH and a power ramping counter for the PUSCH are used for configuring transmission powers of the PRACH and the PUSCH respectively.