Method and apparatus for beam determination

A base station, comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the base station to:
• transmit a first downlink control information (DCI), wherein two common transmission configuration indication (TCI) states are indicated by a TCI field in the first DCI;
• transmit a signaling including beam indication information for a data transmission, wherein the data transmission is a physical downlink shared channel (PDSCH) or a physical downlink shared channel (PUSCH);
• and
• in the case that the two common TCI states are two joint or downlink (DL) common TCI states and the data transmission is a PDSCH, transmit the PDSCH according to beam indication information in at least one slot indicated by the signaling where the two common TCI states are applicable;
• and
• in the case that the two common TCI states are two joint or uplink (UL) common TCI states and the data transmission is a PUSCH, receive the PUSCH according to the beam indication information in at least one slot indicated by the signaling where the two common TCI states are applicable.

A method at a user equipment (UE), the method comprising:

• receiving a first downlink control information (DCI), wherein two common transmission configuration indication (TCI) states are indicated by a TCI field in the first DCI;
• receiving a signaling including beam indication information for a data transmission, wherein the data transmission is a physical downlink shared channel (PDSCH) or a physical downlink shared channel (PUSCH);
• and
• in the case that the two common TCI states are two joint or downlink (DL) common TCI states and the data transmission is a PDSCH, receiving the PDSCH according to the beam indication information in at least one slot indicated by the signaling where the two common TCI states are applicable;
• and
• in the case that the two common TCI states are two joint or uplink (UL) common TCI states and the data transmission is a PUSCH, transmitting the PUSCH according to the beam indication information in at least one slot indicated by the signaling where the two common TCI states are applicable.

A processor for wireless communication, comprising:

• at least one controller coupled with at least one memory and configured to cause the processor to:
• receive a first downlink control information (DCI), wherein two common transmission configuration indication (TCI) states are indicated by a TCI field in the first DCI;
• receive a signaling including beam indication information for a data transmission, wherein the data transmission is a physical downlink shared channel (PDSCH) or a physical downlink shared channel (PUSCH);
• and
• in the case that the two common TCI states are two joint or downlink (DL) common TCI states and the data transmission is a PDSCH, receive the PDSCH according to the beam indication information in at least one slot indicated by the signaling where the two common TCI states are applicable;
• and
• in the case that the two common TCI states are two joint or uplink (UL) common TCI states and the data transmission is a PUSCH, transmit the PUSCH according to the beam indication information in at least one slot indicated by the signaling where the two common TCI states are applicable.