US 11,811,694 B2
Demodulation reference signal (DMRS) indication for single downlink control information (DCI) multitransmission reception point (TRP) transmission
Bishwarup Mondal, San Ramon, CA (US); Avik Sengupta, San Jose, CA (US); Alexei Davydov, Nizhny Novgorod (RU); and Yushu Zhang, Beijing (CN)
Assigned to APPLE INC., Cupertino, CA (US)
Appl. No. 17/430,857
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Feb. 16, 2020, PCT No. PCT/US2020/018473
§ 371(c)(1), (2) Date Aug. 13, 2021,
PCT Pub. No. WO2020/168322, PCT Pub. Date Aug. 20, 2020.
Claims priority of provisional application 62/806,644, filed on Feb. 15, 2019.
Prior Publication US 2022/0216964 A1, Jul. 7, 2022
Int. Cl. H04L 5/00 (2006.01)
CPC H04L 5/0051 (2013.01) 18 Claims
OG exemplary drawing
 
1. A base station (BS), comprising:
radio front end circuitry; and
processor circuitry, coupled to the radio front end circuitry, and configured to:
determine a first transmission configuration indicator (TCI) state corresponding to the BS, wherein the BS is a first transmission reception point (TRP) and a second TCI state corresponds to a second TRP;
determine a demodulation reference signal (DMRS) port indication value that correlates a first DMRS port of the first TRP to the first TCI state and a second DMRS port of the second TRP to the second TCI state,
wherein the DMRS port indication value indicates a number of code division multiplexing (CDM) groups and correlates: a first CDM group of the number of CDM groups with the first DMRS port, and a second CDM group of the number of CDM groups with the second DMRS port and with a third DMRS port, wherein the second DMRS port and the third DMRS port transmit on different layers; and
transmit, using the radio front end circuitry, a single downlink control information (DCI) signal comprising: the first TCI state, the second TCI state, and the DMRS port indication value.