Design on pdcch dmrs mapping and coreset resource allocation

A method of wireless communication of a user equipment (UE), comprising:

• determining a first down link control channel (DCCH) resource candidate in a first control resource set (CORESET) on a carrier, the first DCCH 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 DCCH 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 DCCH resource candidate based on the channel estimation.

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 down link control channel (DCCH) resource candidate in a first control resource set (CORESET) on a carrier, the first DCCH 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 resource blocks (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;
• 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 DCCH resource candidate based on the channel estimation.