Method of monitoring physical downlink control channel and an apparatus using the same

1. A method for a physical downlink control channel (PDCCH) monitoring of a user equipment (UE) in a wireless communication system, the method comprising:

receiving, from a first transmit-receive point (TRP), first information regarding a plurality of control resource sets (CORESETs), the first information providing for each CORESET of the plurality of CORESETs:

i) a CORESET index,

ii) a PDCCH demodulation reference signal (DM-RS) scrambling sequence initialization value,

iii) a CORESET time duration in number of symbols,

iv) a set of resource blocks,

v) control channel element (CCE)-to-resource element group (REG) mapping parameters,

vi) an antenna port quasi co-location indicating quasi co-location information of a DM-RS antenna port for PDCCH reception, and

vii) an indication of presence of transmission configuration indication (TCI) field for a specific downlink control information (DCI) format;

receiving, from the first TRP, second information which reports a first configuration among a plurality of configurations related to the PDCCH monitoring,

wherein the first configuration reports a combination of a first resource pattern index and a first PDCCH CORESET index;

performing a first PDCCH monitoring in a first CORESET indicated by the first PDCCH CORESET index and communicating with the first TRP using a first resource pattern indicated by the first resource pattern index,

wherein the first resource pattern comprises more downlink resources than uplink resources in a slot;

transmitting, to the first TRP, a scheduling request for uplink transmission;

in response to the scheduling request, receiving, from the first TRP, a second configuration for a second TRP,

wherein the second configuration reports a combination of a second resource pattern index and a second PDCCH CORESET index; and

performing a second PDCCH monitoring in a second CORESET indicated by the second PDCCH CORESET index and communicating with the second TRP using a second resource pattern indicated by the second resource pattern index,

wherein the second resource pattern comprises more uplink resources than downlink resources in a slot.

2. The method of claim 1 , wherein each of the first resource pattern index and a second resource pattern index reports a location of uplink resources and downlink resources in a slot, and each of the first PDCCH CORESET index and the second PDCCH CORESET index reports a CORESET for performing a PDCCH monitoring.

3. The method of claim 2 , wherein the PDCCH monitoring is performed in the CORESET in the downlink resources.

4. The method of claim 1 , wherein the PDCCH monitoring is monitoring of a PDCCH transmitted by any one of a plurality of TRPs, the plurality of TRPs including the TRP and the second TRP.

5. The method of claim 4 , wherein the plurality of TRPs have a same cell identity (ID).

6. The method of claim 4 , wherein each of the plurality of TRPs provides a semi-static resource allocation of a different resource pattern.

7. The method of claim 1 , wherein the UE communicates with only one of a plurality of TRPs at a specific time point.

8. A user equipment (UE) comprising:

a transceiver transmitting and receiving a radio signal; and

a processor operatively coupled with the transceiver, wherein the processor is configured to:

receive from a first transmit-receive point (TRP), first information which first information regarding a plurality of control resource sets (CORESETs), the first information providing for each CORESET of the plurality of CORESETs:

i) a CORESET index,

ii) a physical downlink control channel (PDCCH) demodulation reference signal (DM-RS) scrambling sequence initialization value,

iii) a CORESET time duration in number of symbols,

iv) a set of resource blocks,

v) control channel element (CCE)-to-resource element group (REG) mapping parameters,

vi) an antenna port quasi co-location indicating quasi co-location information of a DM-RS antenna port for PDCCH reception, and

vii) an indication of presence of transmission configuration indication (TCI) field for a specific downlink control information (DCI) format;

receive, from the first TRP, second information which reports a first configuration among a plurality of configurations related to a PDCCH monitoring,

wherein the first configuration reports a combination of a first resource pattern index and a first PDCCH CORESET index;

perform a first PDCCH monitoring in a first CORESET indicated by the first PDCCH CORESET index and communicate with the first TRP using a first resource pattern indicated by the first resource pattern index,

wherein the first resource pattern comprises more downlink resources than uplink resources in a slot;

transmit, to the first TRP, a scheduling request for uplink transmission;

in response to the scheduling request, receive, from the first TRP, a second configuration for a second TRP,

wherein the second configuration reports a combination of a second resource pattern index and a second PDCCH CORESET index; and

perform a second PDCCH monitoring in a second CORESET indicated by the second PDCCH CORESET index and communicate with the second TRP using a second resource pattern indicated by the second resource pattern index,

wherein the second resource pattern comprises more uplink resources than downlink resources in a slot.

9. The UE of claim 8 , wherein each of the first resource pattern index and a second resource pattern index reports a location of uplink resources and downlink resources in a slot, and each of the first PDCCH CORESET index and the second PDCCH CORESET index reports a CORESET for performing a PDCCH monitoring.

10. The UE of claim 9 , wherein the PDCCH monitoring is performed in the CORESET in the downlink resources.

11. The UE of claim 8 , wherein the PDCCH monitoring is monitoring of a PDCCH transmitted by any one of a plurality of TRPs, the plurality of TRPs including the first and TRP and the second TRP.

12. The UE of claim 11 , wherein the plurality of TRPs have a same cell identity (ID).

13. The UE of claim 11 , wherein each of the plurality of TRPs provide a semi-static resource allocation of a different resource pattern.

14. A method of communicating with a user equipment (UE) in a wireless communication system, the method performed by a network comprising a first transmit-receive point (TRP) and a second TRP and comprising:

transmitting, through the first TRP, first information regarding a plurality of control resource sets (CORESETs), the first information providing for each CORESET of the plurality of CORESETs:

i) a CORESET index,

ii) a physical downlink control channel (PDCCH) demodulation reference signal (DM-RS) scrambling sequence initialization value,

iii) a CORESET time duration in number of symbols,

iv) a set of resource blocks,

v) control channel element (CCE)-to-resource element group (REG) mapping parameters,

vi) an antenna port quasi co-location indicating quasi co-location information of a DM-RS antenna port for PDCCH reception, and

vii) an indication of presence of transmission configuration indication (TCI) field for a specific downlink control information (DCI) format;

transmitting, through the first TRP, second information which reports a first configuration among a plurality of configurations related to a PDCCH monitoring,

wherein the first configuration reports a combination of a first resource pattern index and a first PDCCH CORESET index;

transmitting a first PDCCH in a first CORESET indicated by the first PDCCH CORESET index and communicating with the UE through the first TRP using a first resource pattern indicated by the first resource pattern index,

wherein the first resource pattern comprises more downlink resources than uplink resources in a slot;

receiving, through the first TRP, a scheduling request for uplink transmission from the UE;

in response to the scheduling request, transmitting, through the first TRP, a second configuration for the second TRP,

wherein the second configuration reports a combination of a second resource pattern index and a second PDCCH CORESET index; and

transmitting a second PDCCH in a second CORESET indicated by the second PDCCH CORESET index and communicating with the UE through the second TRP using a second resource pattern indicated by the second resource pattern index,

wherein the second resource pattern comprises more uplink resources than downlink resources in a slot.

15. A network comprising a first transmit-receive point (TRP) and a second TRP, the network comprising:

a transceiver transmitting and receiving a radio signal; and

a processor operatively coupled with the transceiver, wherein the processor is configured to:

transmit, through the first TRP, first information regarding a plurality of control resource sets (CORESETs), the first information providing for each CORESET of the plurality of CORESETs:

i) a CORESET index,

ii) a physical downlink control channel (PDCCH) demodulation reference signal (DM-RS) scrambling sequence initialization value,

iii) a CORESET time duration in number of symbols,

iv) a set of resource blocks,

v) control channel element (CCE)-to-resource element group (REG) mapping parameters,

vi) an antenna port quasi co-location indicating quasi co-location information of a DM-RS antenna port for PDCCH reception, and

vii) an indication of presence of transmission configuration indication (TCI) field for a specific downlink control information (DCI) format;

transmit, through the first TRP, second information which reports a first configuration among a plurality of configurations related to a PDCCH monitoring,

wherein the first configuration reports a combination of a first resource pattern index and a first PDCCH CORESET index;

transmit, through the first TRP, second information which reports a first configuration among a plurality of configurations related to a PDCCH monitoring,

wherein the first configuration reports a combination of a first resource pattern index and a first PDCCH CORESET index;

transmit a first PDCCH in a first CORESET indicated by the first PDCCH CORESET index and communicate with the UE through the first TRP using a first resource pattern indicated by the first resource pattern index,

wherein the first resource pattern comprises more downlink resources than uplink resources in a slot;

receive, through the first TRP, a scheduling request for uplink transmission from the UE;

in response to the scheduling request, transmit, through the first TRP, a second configuration for the second TRP,

wherein the second configuration reports a combination of a second resource pattern index and a second PDCCH CORESET index; and

transmit a second PDCCH in a second CORESET indicated by the second PDCCH CORESET index and communicate with the UE through the second TRP using a second resource pattern indicated by the second resource pattern index,

wherein the second resource pattern comprises more uplink resources than downlink resources in a slot.

16. A non-transitory computer readable medium (CRM) having an instruction to be executed by at least one processor to perform operations includes:

receiving, from a first transmit-receive point (TRP), first information regarding a plurality of control resource sets (CORESETs), the first information providing for each CORESET of the plurality of CORESETs:

i) a CORESET index,

ii) a physical downlink control channel (PDCCH) demodulation reference signal (DM-RS) scrambling sequence initialization value,

iii) a CORESET time duration in number of symbols,

iv) a set of resource blocks,

v) control channel element (CCE)-to-resource element group (REG) mapping parameters,

vi) an antenna port quasi co-location indicating quasi co-location information of a DM-RS antenna port for PDCCH reception, and

vii) an indication of presence of transmission configuration indication (TCI) field for a specific downlink control information (DCI) format;

receiving, from the first TRP, second information which reports a first configuration among a plurality of configurations related to the PDCCH monitoring,

wherein the first configuration reports a combination of a first resource pattern index and a first PDCCH CORESET index; and

performing a first PDCCH monitoring in a first CORESET indicated by the first PDCCH CORESET index and communicating with the first TRP using a first resource pattern indicated by the first resource pattern index,

wherein the first resource pattern comprises more downlink resources than uplink resources in a slot;

transmitting, to the first TRP, a scheduling request for uplink transmission;

in response to the scheduling request, receiving, from the first TRP, a second configuration a the second TRP,

wherein the second configuration reports a combination of a second resource pattern index and a second PDCCH CORESET index; and

performing a second PDCCH monitoring in a second CORESET indicated by the second PDCCH CORESET index and communicating with the second TRP using a second resource pattern indicated by the second resource pattern index,

wherein the second resource pattern comprises more uplink resources than downlink resources in a slot.

17. An apparatus of a wireless communication system, the apparatus comprising:

a processor; and

a memory coupled with the processor,

wherein the processor is configured to:

receive, from a first transmit-receive point (TRP), first information regarding a plurality of control resource sets (CORESETs), the first information providing for each CORESET of the plurality of CORESETs:

i) a CORESET index,

ii) a physical downlink control channel (PDCCH) demodulation reference signal (DM-RS) scrambling sequence initialization value,

iii) a CORESET time duration in number of symbols,

iv) a set of resource blocks,

v) control channel element (CCE)-to-resource element group (REG) mapping parameters,

vi) an antenna port quasi co-location indicating quasi co-location information of a DM-RS antenna port for PDCCH reception, and

vii) an indication of presence of transmission configuration indication (TCI) field for a specific downlink control information (DCI) format;

receive, from the first TRP, second information which reports a first configuration among a plurality of configurations related to a PDCCH monitoring,

wherein the first configuration reports a combination of a first resource pattern index and a first PDCCH CORESET index; and

perform a first PDCCH monitoring in a first CORESET indicated by the first PDCCH CORESET index and communicate with the first TRP using a first resource pattern indicated by the first resource pattern index,

wherein the first resource pattern comprises more downlink resources than uplink resources in a slot;

transmit, to the first TRP, a scheduling request for uplink transmission;

in response to the scheduling request, receive, from the first TRP, a second configuration a the second TRP,

wherein the second configuration reports a combination of a second resource pattern index and a second PDCCH CORESET index; and

perform a second PDCCH monitoring in a second CORESET indicated by the second PDCCH CORESET index and communicate with the second TRP using a second resource pattern indicated by the second resource pattern index,

wherein the second resource pattern comprises more uplink resources than downlink resources in a slot.