US 12,232,127 B2
Method and apparatus for indicating TCI, base station and storage medium
Xin Su, Beijing (CN); Qiubin Gao, Beijing (CN); Runhua Chen, Beijing (CN); and Mengjun Wang, Beijing (CN)
Assigned to DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
Appl. No. 17/600,605
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Jan. 10, 2020, PCT No. PCT/CN2020/071549
§ 371(c)(1), (2) Date Oct. 1, 2021,
PCT Pub. No. WO2020/199717, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 201910270885.X (CN), filed on Apr. 4, 2019.
Prior Publication US 2022/0201663 A1, Jun. 23, 2022
Int. Cl. H04W 72/23 (2023.01); H04L 5/00 (2006.01)
CPC H04W 72/23 (2023.01) [H04L 5/0053 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method for indicating transmission configuration indication (TCI), applied to a base station, and comprising:
indicating, by downlink control information (DCI), a corresponding relationship between a code division multiplexing (CDM) group and TCI states, in a case that TCI in the DCI configured for a user equipment (UE) corresponds to at least two TCI states;
wherein the CDM group is a CDM group to which demodulation reference signal (DMRS) ports allocated by the base station for the UE belong;
wherein the DMRS ports allocated for the UE conform to a DMRS pilot type 1, and the TCI corresponds to two TCI states, wherein the indicating, by the DCI, the corresponding relationship between the CDM group and the TCI states, comprises one of: indicating, by first indication information in the DCI, that the CDM group to which the DMRS ports allocated for the UE belong corresponds to a first TCI state of the two TCI states; indicating, by second indication information in the DCI, that the CDM group to which the DMRS ports allocated for the UE belong corresponds to a second TCI state of the two TCI states; indicating, by third indication information in the DCI, that a first CDM group to which the DMRS ports allocated for the UE belong corresponds to a first TCI state of the two TCI states, and a second CDM group to which the DMRS ports belong corresponds to a second TCI state of the two TCI states; or indicating, by fourth indication information in the DCI, that a first CDM group to which the DMRS ports allocated for the UE belong corresponds to a second TCI state of the two TCI states, and a second CDM group to which the DMRS ports belong corresponds to a first TCI state of the two TCI states;
or,
wherein the DMRS ports allocated for the UE conform to a DMRS pilot type 1, and the TCI corresponds to two TCI states, wherein the indicating, by the DCI, the corresponding relationship between the CDM group and the TCI states, comprises one of: indicating, by fifth indication information in the DCI, that in a case that the DMRS ports allocated for the UE belong to one CDM group, the one CDM group corresponds to a first TCI state of the two TCI states; and in a case that the DMRS ports allocated for the UE belong to two CDM groups, a first CDM group to which the DMRS ports belong corresponds to the first TCI state of the two TCI states, and a second CDM group to which the DMRS ports belong corresponds to a second TCI state of the two TCI states; or indicating, by sixth indication information in the DCI, that in a case that the DMRS ports allocated for the UE belong to one CDM group, the one CDM group corresponds to a second TCI state of the two TCI states; and in a case that the DMRS ports allocated for the UE belong to two CDM groups, a first CDM group to which the DMRS ports belong corresponds to the second TCI state of the two TCI states, and a second CDM group to which the DMRS ports belong corresponds to a first TCI state of the two TCI states;
or,
wherein the DMRS ports allocated for the UE conform to a DMRS pilot type 2, and the TCI corresponds to two TCI states, wherein the indicating, by the DCI, the corresponding relationship between the CDM group and the TCI states, comprises one of: indicating, by seventh indication information in the DCI, that the CDM group to which the DMRS ports allocated for the UE belong corresponds to a first TCI state of the two TCI states; indicating, by eighth indication information in the DCI, that the CDM group to which the DMRS ports allocated for the UE belong corresponds to a second TCI state of the two TCI states; indicating, by ninth indication information in the DCI, that a first CDM group to which the DMRS ports allocated for the UE belong corresponds to a first TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a second TCI state of the two TCI states; indicating, by tenth indication information in the DCI, that a first CDM group to which the DMRS ports allocated for the UE belong corresponds to a second TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a first TCI state of the two TCI states; indicating, by eleventh indication information in the DCI, that a second CDM group to which the DMRS ports allocated for the UE belong corresponds to a first TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a second TCI state of the two TCI states; indicating, by twelfth indication information in the DCI, that a second CDM group to which the DMRS ports allocated for the UE belong corresponds to a second TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a first TCI state of the two TCI states; indicating, by thirteenth indication information in the DCI, that a third CDM group to which the DMRS ports allocated for the UE belong corresponds to a first TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a second TCI state of the two TCI states; or indicating, by fourteenth indication information in the DCI, that a third CDM group to which the DMRS ports allocated for the UE belong corresponds to a second TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a first TCI state of the two TCI states;
or,
wherein the DMRS ports allocated for the UE conform to a DMRS pilot type 2, and the TCI corresponds to two TCI states, wherein the indicating, by the DCI, the corresponding relationship between the CDM group and the TCI states, comprises one of: indicating, by fifteenth indication information in the DCI, that in a case that the DMRS ports allocated for the UE belong to one CDM group, the one CDM group corresponds to a first TCI state of the two TCI states; and in a case that the DMRS ports allocated for the UE belong to at least two CDM groups comprising a first CDM group, the first CDM group to which the DMRS ports belong corresponds to the first TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a second TCI state of the two TCI states; indicating, by sixteenth indication information in the DCI, that in a case that the DMRS ports allocated for the UE belong to one CDM group, the one CDM group corresponds to a second TCI state of the two TCI states; and in a case that the DMRS ports allocated for the UE belong to at least two CDM groups comprising a first CDM group, the first CDM group to which the DMRS ports belong corresponds to the second TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a first TCI state of the two TCI states; indicating, by seventeenth indication information in the DCI, that a second CDM group to which the DMRS ports allocated for the UE belong corresponds to a first TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a second TCI state of the two TCI states; indicating, by eighteenth indication information in the DCI, that a second CDM group to which the DMRS ports allocated for the UE belong corresponds to a second TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a first TCI state of the two TCI states; indicating, by nineteenth indication information in the DCI, that a third CDM group to which the DMRS ports allocated for the UE belong corresponds to a first TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a second TCI state of the two TCI states; or indicating, by twentieth indication information in the DCI, that a third CDM group to which the DMRS ports allocated for the UE belong corresponds to a second TCI state of the two TCI states, and other CDM groups to which the DMRS ports belong correspond to a first TCI state of the two TCI states.