US 12,289,263 B2
Method for transmitting and receiving phase tracking reference signal in wireless communication system, and apparatus therefor
Kyuseok Kim, Seoul (KR); Hyungtae Kim, Seoul (KR); Jiwon Kang, Seoul (KR); and Kilbom Lee, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 17/608,332
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed May 4, 2020, PCT No. PCT/KR2020/005874
§ 371(c)(1), (2) Date Nov. 2, 2021,
PCT Pub. No. WO2020/222606, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 10-2019-0051877 (KR), filed on May 2, 2019; application No. 10-2019-0055310 (KR), filed on May 10, 2019; and application No. 10-2019-0123411 (KR), filed on Oct. 4, 2019.
Prior Publication US 2022/0239433 A1, Jul. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 5/00 (2006.01); H04W 72/23 (2023.01)
CPC H04L 5/0048 (2013.01) [H04L 5/0094 (2013.01); H04W 72/23 (2023.01)] 10 Claims
OG exemplary drawing
 
1. A method of receiving a phase tracking reference signal (PTRS) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving configuration information related to the PTRS;
receiving downlink control information (DCI) including a transmission configuration indication (TCI) field and an antenna port field,
wherein one or more TCI states are mapped to a codepoint of the TCI field of the DCI based on an activation command, and
wherein the antenna port field includes information related to at least one demodulation reference signal (DMRS) port;
determining a number of PTRS ports based on at least one of i) a number of TCI states configured based on the codepoint, ii) a number of at least one code division multiplexing (CDM) group related to the at least one DMRS port determined based on the antenna port field, or iii) a maximum value of the number of PTRS ports; and
receiving the PTRS based on the determined number of PTRS ports,
wherein an entry related to (i) the at least one DMRS port among DMRS ports and (ii) a number of CDM group(s) without data among CDM groups is configured based on the antenna port field of the DCI,
wherein the DMRS ports are indexed by port indices, respectively, and
wherein the CDM groups are indexed by CDM group indices, respectively.