DATA RECEPTION APPARATUS, DATA TRANSMISSION APPARATUS AND METHODS THEREOF

1 . A data reception apparatus, configured in a terminal equipment, the data reception apparatus comprising:

a receiver configured to receive first indication information, wherein the first indication information is used to indicate at least one set of unified TCI (transmission configuration indication) state(s) for mTRP (multiple transmission and reception points); and

processor circuitry configured to determine one or more transmission configuration indication states (TCI states) in the at least one set of unified TCI state(s) for mTRP according to the first indication information;

wherein the first indication information is carried by media access control control element (MAC CE), and one or more bits in the MAC CE is used to indicate whether at least one unified TCI state in the at least one set of unified TCI state(s) for mTRP is present or not.

2 . The apparatus according to claim 1 , wherein at least one set of unified transmission configuration indication state(s) for mTRP comprises a subset of a first joint/downlink TCI state and a second joint/downlink TCI state, and/or, a subset of a first uplink TCI state and a second uplink TCI state.

3 . The apparatus according to claim 1 , wherein at least one set of unified transmission configuration indication state(s) (TCI state(s)) for multiple transmission and reception point (mTRP) comprises at least one of the following combinations of TCI states (TCI states):

a first downlink transmission configuration indication state (TCI state), a second downlink transmission configuration indication state (TCI state), a first uplink transmission configuration indication state (TCI state), and a second uplink transmission configuration indication state (TCI state);

a first downlink transmission configuration indication state (TCI state), a second downlink transmission configuration indication state (TCI state), and a first uplink transmission configuration indication state (TCI state);

a first downlink transmission configuration indication state (TCI state), a second downlink transmission configuration indication state (TCI state), and a second uplink transmission configuration indication state (TCI state);

a first downlink transmission configuration indication state (TCI state) and a second downlink transmission configuration indication state (TCI state);

a first downlink transmission configuration indication state (TCI state), a first uplink transmission configuration indication state (TCI state), and a second uplink transmission configuration indication state (TCI state);

a first downlink transmission configuration indication state (TCI state) and a first uplink transmission configuration indication state (TCI state);

a first downlink transmission configuration indication state (TCI state) and a second uplink transmission configuration indication state (TCI state);

a first downlink transmission configuration indication state (TCI state);

a second downlink transmission configuration indication state (TCI state), a first uplink transmission configuration indication state (TCI state), and a second uplink transmission configuration indication state (TCI state);

a second downlink transmission configuration indication state (TCI state) and a first uplink transmission configuration indication state (TCI state);

a second downlink transmission configuration indication state (TCI state) and a second uplink transmission configuration indication state (TCI state);

a second downlink transmission configuration indication state (TCI state);

a first uplink transmission configuration indication state (TCI state) and a second uplink transmission configuration indication state (TCI state);

a first uplink transmission configuration indication state (TCI state);

a second uplink transmission configuration indication state (TCI state);

a first joint transmission configuration indication state (TCI state) and a second joint transmission configuration indication state (TCI state);

a first joint transmission configuration indication state (TCI state); or

a second joint transmission configuration indication state (TCI state).

4 . The apparatus according to claim 1 , wherein the MAC CE is used to map up to eight sets of TCI state(s) to codepoints of a DCI field.

5 . The apparatus according to claim 1 , wherein the first indication information indicates the at least one set of unified transmission configuration indication (TCI) state(s) via a first field in the MAC CE, and

wherein the at least one set of unified transmission configuration indication (TCI) state(s) is indicated via a plurality of bits of the first field.

6 . The apparatus according to claim 5 , wherein, if a bit of the first field is set to 1, the bit indicates that a corresponding TCI state for a codepoint is present;

if a bit of the first field is set to 0, the bit indicates that a corresponding TCI state for a codepoint is absent.

7 . The apparatus according to claim 5 , wherein the plurality of bits of the first field are arranged in an order of row first and then column.

8 . The apparatus according to claim 5 , wherein that the at least one set of unified transmission configuration indication (TCI) state(s) is indicated via a plurality of bits of the first field comprises that:

in a case where a first subfield of the bits of the first field is of a first value, the first indication information indicates that there exists no corresponding transmission configuration indication state (TCI state) on a second field to which the first subfield of the bits of the first field corresponds; and

in a case where the first subfield of the bits of the first field is of a second value, the first indication information indicates that there exists a corresponding transmission configuration indication state (TCI state) on the second field to which the first subfield of the bits of the first field corresponds.

9 . The apparatus according to claim 8 , wherein in the case where the first subfield of the bits of the first field is of the second value, the processor circuitry is further configured to read the second field on the first indication information corresponding to the first subfield of the bits of the first field, wherein a first subfield of the second field indicates an identification information index of the transmission configuration indication state (TCI state).

10 . The apparatus according to claim 9 , wherein the first field corresponds to at least one transmission configuration indication codepoint (TCI codepoint), wherein a transmission configuration indication state (TCI state) to which one transmission configuration indication codepoint (TCI codepoint) corresponds is determined by a transmission configuration indication state (TCI state) to which at least one first subfield in the first field corresponds.

11 . The apparatus according to claim 1 , wherein the receiver further receives second indication information, wherein the second indication information indicates an applied transmission configuration indication state (TCI state) according to the transmission configuration indication state (TCI state) determined by the first indication information; and

wherein the second indication information is carried by downlink control information (DCI).

12 . The apparatus according to claim 1 , wherein that the first indication information is carried by a media access control control element (MAC CE) comprises that: the media access control control element (MAC CE) comprises a first media access control control element (MAC CE) and/or a second media access control control element (MAC CE).

13 . The apparatus according to claim 12 , wherein the receiver further receives configuration information, and in a case where a value of the configuration information is ‘separate’, the first indication information is carried by the first media access control control element (MAC CE), and in a case where a value of the configuration information is ‘joint’, the first indication information is carried by the second media access control control element (MAC CE).

14 . The apparatus according to claim 12 , wherein

in the case where the value of the configuration information is ‘separate’, the first indication information indicates the at least one unified TCI state(s) set via a first field of the first MAC CE, wherein the at least one unified TCI state(s) set is indicated via a plurality of bits of the first field;

in the case where the value of the configuration information is ‘joint’, the first indication information indicates the at least one unified TCI state(s) set via a ninth field of the second media access control control element (MAC CE), wherein the at least one set of unified TCI state(s) is indicated by a plurality of bits of the ninth field.

15 . The apparatus according to claim 14 , wherein a bit of the first field in the first MAC CE or the ninth field in the second MAC CE is set to 1 , it indicates a corresponding TCI state for a codepoint is present; a bit of the first field in the first MAC CE or the ninth field in the second MAC CE is set to 0 , it indicates a corresponding TCI state for a codepoint is absent.

16 . The apparatus according to claim 14 , wherein

in a case where a first subfield of the bits of the first field in the first MAC CE or the ninth field in the second MAC CE is of a first value, the first indication information indicates that there exists no corresponding transmission configuration indication state (TCI state) on a second field to which the first subfield of the bits of the first field corresponds or a tenth field to which the first subfield of the bits of the ninth field corresponds, and

in a case where the first subfield of the bits of the first field in the first MAC CE or the ninth field in the second MAC CE is of a second value, the first indication information indicates that there exists a corresponding transmission configuration indication state (TCI state) on the second field to which the first subfield of the bits of the first field corresponds or the tenth field to which the first subfield of the bits of the ninth field corresponds;

wherein the plurality of bits of the first field or the ninth field are arranged in an order of row first and then column.

17 . The apparatus according to claim 16 , wherein

in the case where the first subfield of the bits of the first field is of the second value, the second field on the first indication information corresponding to the first subfield of the bits of the first field is read, wherein a first subfield of the second field indicates the identification information index of the transmission configuration indication state (TCI state);

in the case where the first subfield of the bits of the ninth field is of the second value, the tenth field on the first indication information corresponding to the first subfield of the bits of the ninth field is read, wherein a first subfield of the tenth field indicates an identification information index of the transmission configuration indication state (TCI state).

18 . The apparatus according to claim 17 , wherein

the first field corresponds to at least one transmission configuration indication codepoint (TCI codepoint), wherein a transmission configuration indication state (TCI state) to which one transmission configuration indication codepoint (TCI codepoint) corresponds is determined by a transmission configuration indication state (TCI state) to which at least one first subfield in the first field corresponds;

the ninth field corresponds to at least one transmission configuration indication codepoint (TCI codepoint), wherein a transmission configuration indication state (TCI state) to which one transmission configuration indication codepoint (TCI codepoint) corresponds is determined by a transmission configuration indication state (TCI state) to which at least one first subfield in the ninth field corresponds.

19 . A data transmission apparatus, configured in a network device, the data transmission apparatus comprising:

a transmitter configured to transmit first indication information, wherein the first indication information is used to indicate at least one set of unified transmission configuration indication (TCI) state(s) for multiple transmission and reception points (mTRPs);

wherein the first indication information is used by a terminal equipment to determine one or more transmission configuration indication state (TCI state) in the at least one set of unified transmission configuration indication state (TCI state); and

wherein the first indication information is carried by media access control control element (MAC CE), and one or more bits in the MAC CE is used to indicate whether at least one set of unified TCI state in the at least one unified TCI state(s) for mTRP is present or not.

20 . A communication system, comprising:

a network device configured to transmit first indication information, wherein the first indication information is used to indicate at least one set of unified transmission configuration indication (TCI) state(s) for multiple transmission and reception point (mTRP); and

a terminal equipment configured to determine one or more transmission configuration indication state (TCI state) in the at least one set of unified transmission configuration indication state(s) according to the first indication information;

wherein the first indication information is carried by media access control control element (MAC CE), and one or more bits in the MAC CE is used to indicate whether at least one unified TCI state in at least one set of unified TCI state(s) for mTRP is present or not.