TCI state activation for downlink transmission and uplink transmission
Apparatus and methods are provided for configuring TCI state activation and indication for DL transmission and UL transmission. In one novel aspect, list(s) associated with DL transmission, UL transmission or both DL transmission and UL transmission is/are provided. In particular, a UE can be configured with a plurality of TCI states. After being configured with the TCI states, the UE can receive a command that includes the list(s) associated with DL transmission, UL transmission or both DL transmission and UL transmission. The list(s) records a plurality of TCI state identifications. Accordingly, when the UE receives a value of a TCI field from a DCI and the value maps to designated TCI state identification(s) recorded on the list(s), the UE can apply designated TCI state(s) corresponding to the designated TCI state identification(s) for DL transmission, UL transmission or both DL transmission and UL transmission.
1. A method, comprising:
receiving, by a user equipment (UE), a first command from a network, wherein the first command includes:
a second list associated with downlink (DL) transmission and a third list associated with uplink (UL) transmission, wherein the second list records at least one second transmission configuration indication (TCI) state identification corresponding to at least one second TCI state, the at least one second TCI state is utilized for DL transmission, the third list records at least one third TCI state identification corresponding to at least one third TCI state and the at least one third TCI state is utilized for UL transmission;
receiving an indication indicating whether the second list and the third list apply or a first list applies, wherein the first list associated with both DL transmission and UL transmission, wherein the first list records at least one first TCI state identification corresponding to at least one first TCI state and the at least one first TCI state is utilized for both DL transmission and UL transmission; and
applying, by the UE, at least one designated TCI state corresponding to at least one designated TCI state identification recorded on one of the lists for DL transmission, UL transmission or both DL transmission and UL transmission.
2. The method of claim 1 , further comprising:
determining, by the UE, whether the first command includes the first list or the second list and the third list according a configuration from the first command or a second command.
3. The method of claim 1 , further comprising:
receiving, by the UE, a value of a transmission configuration indication (TCI) field from a downlink control information (DCI), wherein the value maps to the at least one designated TCI state identification recorded on one of the lists.
4. The method of claim 3 , wherein the first command includes the first list, the at least one designated TCI state identification mapped to the value is recorded on the first list, and the at least one designated TCI state is applied for both DL transmission and UL transmission.
5. The method of claim 3 , wherein the first command includes the second list and the third list, the at least one designated TCI state identification mapped to the value is recorded on the second list, and the at least one designated TCI state is applied for DL transmission.
6. The method of claim 3 , wherein the first command includes the second list and the third list, the at least one designated TCI state identification mapped to the value is recorded on the third list, and the at least one designated TCI state is applied for UL transmission.
7. The method of claim 3 , wherein the first command includes the second list and the third list, the at least one designated TCI state identification includes at least one first designated TCI state identification and at least one second designated TCI state identification, the at least one first designated TCI state identification mapped to the value is recorded on the second list, the at least one second designated TCI state identification mapped to the value is recorded on the third list, at least one first designated TCI state corresponding to the at least one first designated TCI state identification is applied for DL transmission, and at least one second designated TCI state corresponding to the at least one second designated TCI state identification is applied for UL transmission.
8. The method of claim 3 , wherein the at least one designated TCI state is applied on a cell or a group of cells.
9. The method of claim 3 , wherein the value further maps to a power control setting identification.
10. The method of claim 3 , further comprising:
receiving, by the UE, a higher layer configuration, wherein the higher layer configuration configures a presence of the TCI field of the DCI.
11. A user equipment (UE) comprising:
a transceiver that:
receives a first command from a network, wherein the first command includes:
a second list associated with downlink (DL) transmission and a third list associated with uplink (UL) transmission, wherein the second list records at least one second transmission configuration indication (TCI) state identification corresponding to at least one second TCI state, the at least one second TCI state is utilized for DL transmission, the third list records at least one third TCI state identification corresponding to at least one third TCI state and the at least one third TCI state is utilized for UL transmission; and
receives an indication indicating whether the second list and the third list apply or a first list applies, wherein the first list associated with both DL transmission and UL transmission, wherein the first list records at least one first TCI state identification corresponding to at least one first TCI state and the at least one first TCI state is utilized for both DL transmission and UL transmission; and
a transmission configuration indication (TCI) handling circuit that:
applies at least one designated TCI state corresponding to at least one designated TCI state identification recorded on one of the lists for DL transmission, UL transmission or both DL transmission and UL transmission.
12. The UE of claim 11 , wherein the TCI handling circuit further determines whether the first command includes the first list or the second list and the third list according a configuration from the first command or a second command.
13. The UE of claim 11 , wherein the transceiver receives a value of a transmission configuration indication (TCI) field from a downlink control information (DCI), the value maps to the at least one designated TCI state identification recorded on one of the lists.
14. The UE of claim 13 , wherein the first command includes the first list, the at least one designated TCI state identification mapped to the value is recorded on the first list, and the at least one designated TCI state is applied for both DL transmission and UL transmission.
15. The UE of claim 13 , wherein the first command includes the second list and the third list, the at least one designated TCI state identification mapped to the value is recorded on the second list, and the at least one designated TCI state is applied for DL transmission.
16. The UE of claim 13 , wherein the first command includes the second list and the third list, the at least one designated TCI state identification mapped to the value is recorded on the third list, and the at least one designated TCI state is applied for UL transmission.
17. The UE of claim 13 , wherein the first command includes the second list and the third list, the at least one designated TCI state identification includes at least one first designated TCI state identification and at least one second designated TCI state identification, the at least one first designated TCI state identification mapped to the value is recorded on the second list, the at least one second designated TCI state identification mapped to the value is recorded on the third list, at least one first designated TCI state corresponding to the at least one first designated TCI state identification is applied for DL transmission, and at least one second designated TCI state corresponding to the second designated TCI state identification is applied for UL transmission.
18. The UE of claim 13 , wherein the at least one designated TCI state is applied on a cell or a group of cells.
19. The UE of claim 13 , wherein the value further maps to a power control setting identification.
20. The UE of claim 13 , wherein the transceiver further receives a higher layer configuration, and the higher layer configuration configures a presence of the TCI field of the DCI.