Network operations for DL TCI configuration
A base station serving a user equipment (UE) may signal a transmission configuration indicator (TCI) state change for more than one control resource set (CORESET). The base station has one or more processors configured to configure, for the UE, a group of control resource sets (CORESETs), the CORESET group including a plurality of CORESETs, signal, to the UE, the CORESET group including the plurality of CORESETs and indicate, to the UE, a transmission configuration indicator (TCI) state change for one or more of the plurality of CORESETs in the CORESET group via a medium access control (MAC) control element (CE).
1. A base station, comprising:
one or more processors configured to:
configure, for a user equipment (UE), a group of control resource sets (CORESETs), the CORESET group including a plurality of CORESETs, wherein configuring the CORESET group comprises configuring N CORESET groups, wherein a CORESET belongs to more than one of the N CORSET groups and wherein each of the N CORESET groups comprise a different set of CORESETs;
signal, to the UE, the CORESET group including the plurality of CORESETs; and
indicate, to the UE, a transmission configuration indicator (TCI) state change for one or more of the plurality of CORESETs in the CORESET group via a medium access control (MAC) control element (CE); and
a transceiver communicatively connected to the one or more processors.
2. The base station of claim 1 , wherein the CORESET group is configured via one of radio resource control (RRC) signaling or a CORESETPoolIndex.
3. The base station of claim 1 , wherein the MAC CE comprises a CORESET group identifier (ID) for the CORESET group and wherein the TCI state change is indicated directly to the UE based on the CORESET group ID, and wherein the TCI state change is to be applied to all the CORESETs in the CORESET group.
4. The base station of claim 1 , wherein the MAC CE comprises an identification of one of the plurality of CORESETs in the CORESET group and wherein the TCI state change is to be applied to all the CORESETs in the CORESET group to which the one of the CORESETs belongs.
5. The base station of claim 1 , wherein the MAC CE comprises a field for indicating whether the TCI state change applies to a single CORESET or to the CORESET group.
6. The base station of claim 5 , wherein, when the field indicates the TCI state change applies to the CORESET group, a further field of the MAC CE comprises a CORESET group identifier (ID) for the CORESET group.
7. The base station of claim 5 , wherein, when the field indicates the TCI state change applies to a single CORESET, a further field of the MAC CE comprises a CORESET identifier (ID) for the single CORESET.
8. A base station, comprising:
one or more processors configured to:
configure, for a user equipment (UE), a list of component carriers (CCs) having common beam management (CBM); and
indicate to the UE, via a medium access control (MAC) control element (CE), either a transmission configuration indicator (TCI) state change for a physical downlink shared channel (PDSCH) or a control resource set (CORESET) beam change for a physical downlink control channel (PDCCH), the MAC CE comprising an indicator for a CC so that the UE applies the TCI state change for the PDSCH or the CORESET beam change for the PDCCH to each of the CCs in the CC list that includes the indicated CC; and
a transceiver communicatively connected to the one or more processors.
9. The base station of claim 8 , wherein the CC list comprises all CCs for which the UE can perform CBM.
10. The base station of claim 8 , wherein the one or more processors are further configured to:
receive an indication from the UE of a modified CC list different from the CC list; and
update the CC list to correspond to the modified CC list.
11. The base station of claim 10 , wherein the UE indicated the modified CC list to a network via an uplink MAC CE.
12. A base station, comprising:
one or more processors configured to:
configure, for a user equipment (UE), whether a simultaneous transmission configuration indicator (TCI) state change for a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) is to be applied; and
transmit, to the UE, an indication of whether the simultaneous TCI state change is to be applied via a PDSCH medium access control (MAC) control element (CE), wherein the PDSCH MAC CE includes a first field configured to indicate whether the simultaneous TCI state change is to be used, a second field configured to indicate whether a control resource set (CORESET) group comprising multiple CORESETs are to be changed simultaneously and a third field configured to indicate whether a single control resource set (CORESET) group or all active CORESETs are to be changed; and
a transceiver communicatively connected to the one or more processors.
13. The base station of claim 12 , wherein the simultaneous TCI state change is configured by a radio resource control (RRC) layer.