	US 12,238,025 B2
	Systems and methods for mapping transmission configuration indication (TCI) state and demodulation reference signal (DMRS) ports groups
Yushu Zhang, Beijing (CN); Bishwarup Mondal, San Ramon, CA (US); Alexei Davydov, Nizhny Novorod (RU); Guotong Wang, Beijing (CN); and Avik Sengupta, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/419,426
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Jan. 7, 2020, PCT No. PCT/US2020/012569 § 371(c)(1), (2) Date Jun. 29, 2021, PCT Pub. No. WO2020/146377, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. PCT/CN2019/070917 (WO), filed on Jan. 8, 2019.
Prior Publication US 2022/0077982 A1, Mar. 10, 2022
Int. Cl. H04L 5/00 (2006.01); H04W 72/23 (2023.01)

CPC H04L 5/0048 (2013.01) [H04W 72/23 (2023.01)]

20 Claims

1. A base station configured for operation in a multiple transmission and reception point (multi-TRP) wireless network, the base station comprising:

radio front end circuitry; and

processor circuitry, coupled to the radio front end circuitry, configured to cause the base station to:

configure a transmission configuration indication (TCI) state to demodulation reference signal (DMRS) ports group mapping for a user equipment (UE) wherein the TCI state to DMRS ports group mapping associates a list of TCI states respectively to one or more DMRS ports groups;

transmit, to the UE using the radio front end circuitry, a control signal indicating a first TCI state and a second TCI state selected from the list of TCI states; and

transmit, to the UE, physical downlink shared channel (PDSCH) and associated DMRS transmissions scheduled by the control signal and based on at least one of the first TCI state or the second TCI state and on the TCI state to DMRS ports group mapping.