METHODS AND APPARATUSES FOR MULTI-TRP TRANSMISSION IN HST SCENARIOS

1 . A method performed by a wireless transmit/receive unit (WTRU), the method comprising:

receiving zone configuration information pertaining to one or more zones, each zone of the one or more zones having one or more zone identifiers (zone-ids), wherein the configuration information indicates, for each respective zone-id of the one or more zone-ids, one or more of: a beam reference signal (BRS), a set of transmission configuration indicator (TCI) states, a search space, or a control resource set (CORESET) configuration or uplink resources;

and

transmitting, to a base station, an indication of a zone-id determined from the one or more zone-ids based on a measurement of one or more BRSs indicated via the configuration information, using uplink resources associated with the zone-id.

2 . The method of claim 1 , wherein zone configurations of the zone configuration information are defined by geographical coordinates.

3 . The method of claim 1 , wherein the determining of the zone-id from among the one or more zone-ids is further based on geographical coordinates of the WTRU.

4 . The method of claim 1 , wherein each zone-id is associated with a BRS.

5 . The method of claim 1 , wherein each zone-id is associated with a set of transmission configuration indicator (TCI) states for receiving a physical downlink shared channel (PDSCH) transmission.

6 . The method of claim 1 , wherein each zone-id is associated with a search space.

7 . The method of claim 1 , wherein each zone-id is associated with a control resource set (CORESET) configuration.

8 . The method of claim 1 , wherein each zone-id is associated with uplink resources.

9 . A method performed by a wireless transmit/receive unit (WTRU), the method comprising:

receiving zone configuration information pertaining to one or more zones, each zone of the one or more zones having one or more zone identifiers (zone-ids), wherein the configuration information indicates, for each respective zone-id of the one or more zone-ids, one or more of: a beam reference signal (BRS), a set of transmission configuration indicator (TCI) states, a search space, a control resource set (CORESET) configuration or uplink resources;

determining a zone-id of the one or more zones-ids, based on a measurement of one or more BRSs indicated via the configuration information;

monitoring a search space according to a search space configuration of the determined zone-id, for a physical downlink control channel (PDCCH) transmission;

receiving downlink control information (DCI) of the PDCCH transmission, wherein the DCI indicates a TCI state for receiving a PDSCH transmission;

determining a reference signal (RS) associated with the TCI state indicated by the DCI, based on the determined zone-id;

receiving a PDSCH transmission using an associated PDSCH demodulation reference signal (DMRS) that is quasi co-located with the determined RS; and

transmitting, to a base station, an indication of the determined zone-id, using uplink resources configured for the zone-id.

10 . The method of claim 9 , wherein zone configurations of the zone configuration information are defined by geographical coordinates.

11 . The method of claim 9 , wherein the determining of the zone-id from among the one or more zone-ids is further based on geographical coordinates of the WTRU.

12 . The method of claim 9 , wherein each zone-id is associated with a BRS.

13 . The method of claim 9 , wherein each zone-id is associated with a set of transmission configuration indicator (TCI) states for receiving a physical downlink shared channel (PDSCH) transmission.

14 . The method of claim 9 , wherein each zone-id is associated with a search space.

15 . The method of claim 9 , wherein each zone-id is associated with a control resource set (CORESET) configuration.

16 . The method of claim 9 , wherein each zone-id is associated with uplink resources.

17 . A wireless transmit/receive unit (WTRU) comprising:

a receiver configured to receive zone configuration information pertaining to one or more zones having one or more zone identifiers (zone-ids), wherein the configuration information indicates, for each respective zone-id of the one or more zone-ids, the configuration information indicates one or more of: a beam reference signal (BRS), a set of transmission configuration indicator (TCI) states, a search space, a control resource set (CORESET) configuration or uplink resources;

and

circuitry configured to indicate, to a base station, a zone-id determined from the one or more zone-ids based on a measurement of one or more BRSs indicated via the configuration information, using uplink resources configured for the zone-id.

18 . The WTRU of claim 17 , further comprising:

circuitry configured to monitor a search space or CORESET according to a search space or CORESET configuration of the determined zone-id, for a physical downlink control channel (PDCCH) transmission.

19 . The WTRU of claim 18 , further comprising:

the receiver configured to receive downlink control information (DCI) of the PDCCH transmission, wherein the DCI indicates a TCI state for receiving a PDSCH transmission.

20 . The WTRU of claim 19 , further comprising:

circuitry configured to determine a reference signal (RS) associated with the TCI state indicated by the DCI, based on the determined zone-id; and

the receiver further configured to receive a PDSCH transmission using an associated PDSCH demodulation reference signal (DMRS) that is quasi co-located with the determined RS.