Method for monitoring scheduling information in wireless communication system, and device using method
A method for monitoring scheduling information in a wireless communication system, and a device using the method are provided. The method: receives first configuration information about a search space of a first cell and second configuration information about the search space of a second cell; and monitors scheduling information for scheduling the second cell in the search space of the first cell, wherein the number of physical downlink control channel (PDCCH) candidates per aggregation level (AL) to be used in the search space of the first cell is determined on the basis of the second configuration information.
1. A method for monitoring scheduling information in a wireless communication system, the method comprising:
receiving first search space configuration information for a first cell and second search space configuration information for a second cell; and
monitoring scheduling information in a search space of the first cell based on the first search space configuration information or the second search space configuration information,
wherein:
in a case of cross carrier scheduling where the first cell is a scheduling cell and the second cell is a scheduled cell,
i) a number of physical downlink control channel (PDCCH) candidates and aggregation levels to be used on the first cell is determined based on a field in the second search space configuration information, and
ii) in the second search space configuration information, all optional fields are absent except the field.
2. The method of claim 1 , wherein the field informs a value of the number of PDCCH candidates for each aggregation level.
3. The method of claim 1 , wherein, based on monitoring the scheduling information for the second cell in the search space of the first cell, any information other than a number of PDCCH candidates per aggregation level is determined based on the first search space configuration information.
4. The method of claim 3 , wherein the other information comprises the ID (identity) of a control resource set (CORESET) related with the search space.
5. The method of claim 1 , wherein, based on monitoring scheduling information for the first cell in the search space of the first cell, the monitoring in the search space of the first cell is performed based on the first search space configuration information.
6. The method of claim 1 , wherein the first cell and the second cell are cells having the same subcarrier spacing.
7. The method of claim 1 , wherein the first cell and the second cell are cells having different subcarrier spacings.
8. The method of claim 1 , wherein the first search space configuration information and the second search space configuration information are received through an RRC (radio resource control) signal.
9. The method of claim 1 , wherein an identity (ID) of the search space of the first cell and an ID of a search space of the second cell are same as each other.
10. A user equipment (UE) comprising:
a transceiver for transmitting and receiving a radio signal; and
a processor operatively coupled to the transceiver,
wherein the processor is configured to:
receive first search space configuration information for a search space of a first cell and second search space configuration information for a search space of a second cell,
monitor scheduling information in a search space of the first cell based on the first search space configuration information or the second search space configuration information,
wherein:
in a case of cross carrier scheduling where the first cell is a scheduling cell and the second cell is a scheduled cell,
i) a number of physical downlink control channel (PDCCH) candidates and aggregation levels to be used on the first cell is determined based on a field in the second search space configuration information, and
ii) in the second search space configuration information, all optional fields are absent except the field.
11. The UE of claim 10 , wherein the field informs a value of the number of PDCCH candidates for each aggregation level.
12. The UE of claim 10 , wherein an identity (ID) of the search space of the first cell and an ID of a search space of the second cell are same as each other.
13. An apparatus, the apparatus comprising:
a hardware processor; and
a memory operably coupled to the hardware processor,
wherein the memory stores Instructions which when executed by the hardware processor cause a wireless communication device to:
receive first search space configuration information for a first cell and second search space configuration information for a second cell, and
monitor scheduling information in a search space of the first cell based on the first search space configuration information or the second search space configuration information,
wherein:
in a case of cross carrier scheduling where the first cell is a scheduling cell and the second cell is a scheduled cell,
i) a number of physical downlink control channel (PDCCH) candidates and aggregation levels to be used on the first cell is determined based on a field in the second search space configuration information, and
ii) in the second search space configuration information, all optional fields are absent except the field.
14. The apparatus of claim 13 , wherein the field informs a value of the number of PDCCH candidates for each aggregation level.
15. The apparatus of claim 13 , wherein an identity (ID) of the search space of the first cell and an ID of a search space of the second cell are same as each other.