Beam configuration for secondary cells
Procedures for using a transmission configuration indication (TCI) state in wireless communications are described. A base station may send one or more configuration parameters indicating a plurality of cells to be updated with a same TCI state. A wireless device may perform, via the plurality of cells and using one or more parameters associated with the TCI state, at least one of transmission or reception.
1. A method comprising:
receiving, by a wireless device, one or more configuration parameters indicating a plurality of cells, of one or more cell groups, to be updated with a same transmission configuration indication (TCI) state;
receiving a control command indicating:
a cell index for a first cell of the plurality of cells; and
a TCI state for the first cell; and
applying, for transmission or reception, the TCI state to one or more control channels of each cell of the plurality of cells.
2. The method of claim 1 , further comprising determining, based on the one or more configuration parameters, a cell group parameter indicating one or more cell indexes of the plurality of cells,
wherein the applying the TCI state to the one or more control channels of each cell of the plurality of cells is based on the cell group parameter.
3. The method of claim 1 , further comprising:
determining, based on the TCI state, one or more uplink control channels of each cell of the plurality of cells; and
determining, based on the TCI state, one or more downlink control channels of each cell of the plurality of cells.
4. The method of claim 1 , wherein each cell of the plurality of cells is quasi-co-located using a same serving beam for physical downlink control channel (PDCCH) reception; and
wherein the applying the TCI state comprises applying the TCI state to one or more downlink control channels of each cell of the plurality of cells.
5. The method of claim 1 , wherein each cell of the plurality of cells is quasi-co-located using a same serving beam for physical uplink control channel (PUCCH) transmission; and
wherein the applying the TCI state comprises applying the TCI state to one or more uplink control channels of each cell of the plurality of cells.
6. The method of claim 1 , wherein the TCI state indicated by the control command is associated with a cell group parameter indicating one or more cell indexes of the plurality of cells, wherein the one or more cell indexes comprises the cell index for the first cell.
7. The method of claim 1 , wherein the TCI state indicated by the control command is associated with a reference signal, and
wherein demodulation reference signal (DM-RS) antenna ports, of one or more channels associated with control resource sets (CORESETs) of each cell of the plurality of cells, are quasi-co-located with the reference signal.
8. The method of claim 1 , wherein the one or more configuration parameters comprise one or more beam failure recovery (BFR) configuration parameters; and
wherein the method further comprises:
sending an uplink signal for a BFR procedure;
receiving, via one or more downlink control channels, an indication of a completion of the BFR procedure; and
based on the one or more BFR configuration parameters and the indication of the completion of the BFR procedure, stopping monitoring of downlink control channels of each cell, of the plurality of cells, other than the first cell.
9. The method of claim 1 , wherein the control command is a medium access control (MAC) control element (CE) activation command.
10. The method of claim 1 , further comprising:
after the applying the TCI state and via the one or more control channels of each cell of the plurality of cells, at least one of:
receiving a downlink transmission; or
sending an uplink transmission.
11. The method of claim 1 , wherein the plurality of cells are associated with beam failure recovery.
12. A method comprising:
receiving, by a wireless device, one or more configuration parameters indicating a plurality of cells, of one or more cell groups, to be updated with a same transmission configuration indication (TCI) state;
receiving, by the wireless device, a control command indicating:
a cell index for a first cell of the plurality of cells; and
a TCI state for the first cell; and
receiving, using the TCI state indicated by the control command, downlink transmission via one or more downlink control channels of each cell of the plurality of cells.
13. The method of claim 12 , further comprising:
determining, based on the one or more configuration parameters, a cell group parameter indicating one or more cell indexes of the plurality of cells; and
applying, based on the one or more cell indexes comprising the cell index for the first cell and at least one cell index for at least one second cell of the plurality of cells, the TCI state to the one or more downlink control channels of the at least one second cell of the plurality of cells.
14. The method of claim 12 , further comprising:
determining, based on the TCI state, one or more uplink control channels of each cell of the plurality of cells; and
applying the TCI state to the one or more uplink control channels of each cell of the plurality of cells.
15. The method of claim 12 , wherein the TCI state indicated by the control command is associated with a cell group parameter indicating one or more cell indexes of the plurality of cells, wherein the one or more cell indexes comprises the cell index for the first cell.
16. The method of claim 12 , wherein the TCI state indicated by the control command is associated with a reference signal, and
wherein demodulation reference signal (DM-RS) antenna ports, of one or more downlink channels associated with control resource sets (CORESETs) of the plurality of cells, are quasi-co-located with the reference signal.
17. The method of claim 12 , wherein the method further comprises:
sending an uplink signal for a beam failure recovery (BFR) procedure;
receiving, via one or more downlink control channels, an indication of a completion of the BFR procedure; and
based on one or more BFR configuration parameters and the indication of the completion of the BFR procedure, stopping monitoring of downlink control channels of each cell, of the plurality of cells, other than the first cell.
18. The method of claim 1 , wherein the applying the TCI state comprises applying the TCI state to one or more control channels of each cell of the plurality of cells based on:
the control command indicating the TCI state for the first cell; and
the plurality of cells comprising the first cell.
19. The method of claim 12 , wherein the control command is a medium access control (MAC) control element (CE) activation command.
20. The method of claim 12 , further comprising applying the TCI state to one or more channels of each cell of the plurality of cells based on:
the control command indicating the TCI state for the first cell; and
the plurality of cells comprising the first cell.
21. A method comprising:
receiving, by a wireless device, one or more configuration parameters indicating a plurality of cells, of one or more cell groups, to be updated with a same transmission configuration indication (TCI) state;
receiving a control command indicating:
a cell index for a first cell of the plurality of cells; and
a TCI state for the first cell; and
sending, using the TCI state indicated by the control command, uplink transmission via one or more uplink channels of each cell of the plurality of cells.
22. The method of claim 21 , further comprising:
determining, based on the TCI state, one or more uplink control channels of each cell of the plurality of cells; and
applying the TCI state to the one or more uplink control channels of each cell of the plurality of cells.
23. The method of claim 21 , further comprising:
determining, based on the one or more configuration parameters, a cell group parameter indicating one or more cell indexes of the plurality of cells; and
applying, based on the one or more cell indexes comprising the cell index for the first cell and at least one cell index for at least one second cell of the plurality of cells, the TCI state to the one or more uplink channels of the at least one second cell of the plurality of cells.
24. The method of claim 21 , further comprising determining, based on the TCI state indicated by the control command, a cell group parameter indicating one or more cell indexes of the plurality of cells, wherein the one or more cell indexes comprises the cell index for the first cell.
25. The method of claim 21 , wherein the TCI state indicated by the control command, is associated with a reference signal, and
wherein demodulation reference signal (DM-RS) antenna ports, of one or more channels in control resource sets (CORESETs) of the plurality of cells, are quasi-co-located with the reference signal.
26. The method of claim 21 , wherein the one or more configuration parameters comprise one or more beam failure recovery (BFR) configuration parameters; and wherein the method further comprises:
receiving, via one or more downlink control channels, an indication of a completion of a BFR procedure; and
based on the one or more BFR configuration parameters and the indication of the completion of the BFR procedure, stopping monitoring of downlink control channels of each cell, of the plurality of cells, other than the first cell.
27. The method of claim 21 , wherein the control command is a medium access control (MAC) control element (CE) activation command.
28. The method of claim 21 , further comprising applying the TCI state to one or more channels of each cell of the plurality of cells based on:
the control command indicating the TCI state for the first cell; and
the plurality of cells comprising the first cell.