PDCCH DMRS mapping and coreset resource allocation
A UE determines a first DCCH resource candidate in a first CORESET on a carrier, the first DCCH resource candidate including a first set of RBs. The UE also determines a first sequence of DMRSs that are mapped, starting at a reference point, to RBs in a predetermined range within the carrier in a frequency domain, the predetermined range containing the first DCCH resource candidate in the frequency domain. The UE further determines a first reference location of the first set of RBs. The UE determines, based on the first reference location, a first set of DMRSs from the first sequence of DMRSs, the first set of DMRSs being mapped to the first set of RBs. The UE obtains a channel estimation based on the first set of DMRSs; and The UE performs blind decoding of the first DCCH resource candidate based on the channel estimation.
1. A method of wireless communication of a user equipment (UE), comprising:
determining a first physical down link control channel (PDCCH) resource candidate in a first control resource set (CORESET) on a carrier, the first PDCCH resource candidate including a first set of resource blocks (RBs);
determining a first sequence of Demodulation Reference Signals (DMRSs) that are mapped, starting at a reference point, to RBs in a predetermined range within the carrier in a frequency domain, the predetermined range containing the first PDCCH resource candidate in the frequency domain;
determining, with reference to the reference point in the frequency domain, a first reference location of the first set of RBs;
determining, based on the first reference location, a first set of DMRSs from the first sequence of DMRSs, the first set of DMRSs being mapped to the first set of RBs;
obtaining a channel estimation based on the first set of DMRSs; and
performing blind decoding of the first PDCCH resource candidate based on the channel estimation.
2. The method of claim 1 , further comprising:
receiving a first CORESET configuration of the first CORESET; and
determining resources occupied by the first CORESET on the carrier in the frequency domain based on the first CORESET configuration.
3. The method of claim 2 , wherein the first reference location is indicated by an integer of RBs away from the reference point.
4. The method of claim 2 , wherein the reference point is a predetermined point of the first CORESET in the frequency domain, wherein the predetermined range is a range occupied by the first CORESET in the frequency domain.
5. The method of claim 2 , wherein the reference point is a predetermined point of a bandwidth part of the carrier assigned to the UE in the frequency domain, wherein the predetermined range is a range occupied by the bandwidth part in the frequency domain.
6. The method of claim 5 , wherein the first CORESET configuration is received through a system information transmission.
7. The method of claim 5 , further comprising:
determining a second PDCCH resource candidate in a second CORESET of the UE on the carrier, the second PDCCH resource candidate including the first set of RBs; and
preforming blind decoding of the second PDCCH resource candidate based on the channel estimation.
8. An apparatus for wireless communication, the apparatus being a user equipment (UE), comprising:
a memory; and
at least one processor coupled to the memory and configured to:
determine a first physical down link control channel (PDCCH) resource candidate in a first control resource set (CORESET) on a carrier, the first PDCCH resource candidate including a first set of resource blocks (RBs);
determine a first sequence of Demodulation Reference Signals (DMRSs) that are mapped, starting at a reference point, to RBs in a predetermined range within the carrier in a frequency domain, the predetermined range containing the first PDCCH resource candidate in the frequency domain;
determine, with reference to the reference point in the frequency domain, a first reference location of the first set of RBs;
determine, based on the first reference location, a first set of DMRSs from the first sequence of DMRSs, the first set of DMRSs being mapped to the first set of RBs;
obtain a channel estimation based on the first set of DMRSs; and
perform blind decoding of the first PDCCH resource candidate based on the channel estimation.
9. The apparatus of claim 8 , wherein the at least one processor is further configured to:
receive a first CORESET configuration of the first CORESET; and
determine resources occupied by the first CORESET on the carrier in the frequency domain based on the first CORESET configuration.
10. The apparatus of claim 9 , wherein the first reference location is indicated by an integer of RBs away from the reference point.
11. The apparatus of claim 9 , wherein the reference point is a predetermined point of the first CORESET in the frequency domain, wherein the predetermined range is a range occupied by the first CORESET in the frequency domain.
12. The apparatus of claim 9 , wherein the reference point is a predetermined point of a bandwidth part of the carrier assigned to the UE in the frequency domain, wherein the predetermined range is a range occupied by the bandwidth part in the frequency domain.
13. The apparatus of claim 12 , wherein the first CORESET configuration is received through a system information transmission.
14. The apparatus of claim 12 , wherein the at least one processor is further configured to:
determine a second PDCCH resource candidate in a second CORESET of the UE on the carrier, the second PDCCH resource candidate including the first set of RBs; and
preform blind decoding of the second PDCCH resource candidate based on the channel estimation.
15. A non-transitory computer-readable medium storing computer executable code for wireless communication of wireless equipment, comprising code to:
determine a first physical down link control channel (PDCCH) resource candidate in a first control resource set (CORESET) on a carrier, the first PDCCH resource candidate including a first set of resource blocks (RBs);
determine a first sequence of Demodulation Reference Signals (DMRSs) that are mapped, starting at a reference point, to RBs in a predetermined range within the carrier in a frequency domain, the predetermined range containing the first PDCCH resource candidate in the frequency domain;
determine, with reference to the reference point in the frequency domain, a first reference location of the first set of RBs;
determine, based on the first reference location, a first set of DMRSs from the first sequence of DMRSs, the first set of DMRSs being mapped to the first set of RBs;
obtain a channel estimation based on the first set of DMRSs; and
perform blind decoding of the first PDCCH resource candidate based on the channel estimation.
16. The non-transitory computer-readable medium of claim 15 , wherein the code is further configured to:
receive a first CORESET configuration of the first CORESET; and
determine resources occupied by the first CORESET on the carrier in the frequency domain based on the first CORESET configuration.
17. The non-transitory computer-readable medium of claim 16 , wherein the first reference location is indicated by an integer of RBs away from the reference point.
18. The non-transitory computer-readable medium of claim 16 , wherein the reference point is a predetermined point of the first CORESET in the frequency domain, wherein the predetermined range is a range occupied by the first CORESET in the frequency domain.
19. The non-transitory computer-readable medium of claim 16 , wherein the reference point is a predetermined point of a bandwidth part of the carrier assigned to the UE in the frequency domain, wherein the predetermined range is a range occupied by the bandwidth part in the frequency domain.
20. The non-transitory computer-readable medium of claim 19 , wherein the first CORESET configuration is received through a system information transmission.