Method and apparatus for configuration of repetitive transmission and reception of downlink control information in wireless communication system
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure provides a method for coverage enhancement for a PDCCH in a wireless communication system. The disclosure provides a method for effectively improving the reception reliability of downlink control information in a mobile communication system via multiple transmission points (TRPs).
1. A method performed by a terminal in a wireless communication system, the method comprising:
transmitting first capability information indicating a counting number of blind decodings for two physical downlink control channel (PDCCH) candidates associated with linked search spaces for PDCCH repetitions;
receiving configuration information indicating that a first search space and a second search space are the linked search spaces for PDCCH repetitions;
identifying monitoring occasions of a first PDCCH candidate associated with the first search space and a second PDCCH candidate associated with the second search space for detection of a first downlink control information (DCI) format and a monitoring occasion of a third PDCCH candidate for detection of a second DCI format; and
performing a PDCCH monitoring based on the identification,
wherein the third PDCCH candidate is not counted for a number of blind decodings, in case that one of the first PDCCH candidate and the second PDCCH candidate overlaps with the third PDCCH candidate.
2. The method of claim 1 , wherein the second DCI format has a same size as the first DCI format.
3. The method of claim 1 , wherein the third PDCCH candidate and one of the first PDCCH candidate and the second PDCCH candidate that overlaps with the third PDCCH candidate are associated with a same scrambling, a same set of control channel elements (CCEs), and a same control resource set (CORESET).
4. The method of claim 1 , wherein the first capability information indicates either 2 or 3.
5. The method of claim 1 , further comprising transmitting second capability information indicating that the terminal supports monitoring of an individual PDCCH candidate.
6. The method of claim 5 , wherein the third PDCCH candidate is monitored according to the second capability information.
7. The method of claim 1 , further comprising transmitting third capability information indicating a maximum number of overlaps between one of the two PDCCH candidates associated with the linked search spaces for PDCCH repetitions and an individual PDCCH candidate using a same set of control channel elements (CCEs) per slot.
8. The method of claim 1 , further comprising determining a later in time of the first PDCCH candidate and the second PDCCH candidate as a reference PDCCH candidate for receiving a physical downlink shared channel (PDSCH).
9. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
transmit, via the transceiver, first capability information indicating a counting number of blind decodings for two physical downlink control channel (PDCCH) candidates associated with linked search spaces for PDCCH repetitions,
receive, via the transceiver, configuration information indicating that a first search space and a second search space are the linked search spaces for PDCCH repetitions,
identify monitoring occasions of a first PDCCH candidate associated with the first search space and a second PDCCH candidate associated with the second search space for detection of a first downlink control information (DCI) format and a monitoring occasion of a third PDCCH candidate for detection of a second DCI format, and
perform a PDCCH monitoring based on the identification,
wherein the third PDCCH candidate is not counted for a number of blind decodings, in case that one of the first PDCCH candidate and the second PDCCH candidate overlaps with the third PDCCH candidate.
10. The terminal of claim 9 , wherein the second DCI format has a same size as the first DCI format.
11. The terminal of claim 9 , wherein the third PDCCH candidate and one of the first PDCCH candidate and the second PDCCH candidate that overlaps with the third PDCCH candidate are associated with a same scrambling, a same set of control channel elements (CCEs), and a same control resource set (CORESET).
12. The terminal of claim 9 , wherein the first capability information indicates either 2 or 3.
13. The terminal of claim 9 , wherein the controller is further configured to transmit, via the transceiver, second capability information indicating that the terminal supports monitoring of an individual PDCCH candidate.
14. The terminal of claim 13 , wherein the third PDCCH candidate is monitored according to the second capability information.
15. The terminal of claim 9 , wherein the controller is further configured to transmit, via the transceiver, third capability information indicating a maximum number of overlaps between one of the two PDCCH candidates associated with the linked search spaces for PDCCH repetitions and an individual PDCCH candidate using a same set of control channel elements (CCEs) per slot.
16. The terminal of claim 9 , wherein the controller is further configured to determine a later in time of the first PDCCH candidate and the second PDCCH candidate as a reference PDCCH candidate for receiving a physical downlink shared channel (PDSCH).