Method and apparatus for transmitting and receiving downlink control signal in wireless communication system
摘要
說明書
A search space is recalculated based on a CORESET except for the overlapping region in the second CORESET, and a PDCCH may be transmitted on a PDCCH candidate existing in the newly-calculated search space. More specifically, when the second CORESET includes a total of N CCEs and the overlapping region includes a total of M CCEs, the BS may recalculate a search space based on the remaining (N-M) CCEs except for the overlapping region, and may transmit a PDCCH in the newly-calculated search space.
When the terminal monitors a PDCCH in the overlapping region, in relation to the first CORESET, the terminal may blind-decode an entire search space of the first CORESET regardless of the overlapping region.
For the second CORESET, the terminal may assume that the second CORESET has been rate-matched in the overlapping region, and then may blind-decode only the remaining region except for the overlapping region in the second CORESET. In this example, by using a method such as method 2-1 or method 2-2, the terminal may assume a search space, and then may perform blind-decoding.
[Method 3]
When an overlapping region between the first CORESET and the second CORESET exists, the BS may transmit a DMRS, which complies with DMRS configuration #1, even in the second CORESET. That is, the BS may transmit DMRSs, to which the same precoding is applied, on all REGs even in the second CORESET. In this example, the same precoding may be applied in both the first CORESET and the second CORESET.
