Time density and frequency density determination of phase tracking reference signals (pt-rs) in new radio (nr) systems

A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of a Next Generation Node-B (gNB), the operations to configure the processing circuitry to:

• encode a PTRS-UplinkConfig IE to include:
• a higher layer parameter timeDensity that indicates a plurality of MCS thresholds, and
• a higher layer parameter frequencyDensity that indicates a plurality of RB thresholds;
• encode, for transmission to a User Equipment (UE), control signaling that includes the PTRS-UplinkConfig IE;
• encode, for transmission to the UE, downlink control information (DCI) that includes a scheduled modulation and coding scheme (MCS) and a scheduled bandwidth;
• determine a time density of phase tracking reference signal (PT-RS) to be received from the UE, the time spacing parameter determined based at least partly on a comparison between the scheduled MCS and the plurality of MCS thresholds;
• and
• determine a frequency density of the PT-RS, the frequency spacing parameter determined based at least partly on a comparison between the scheduled bandwidth and the plurality of resource block (RB) thresholds.

An apparatus of a User Equipment (UE), the apparatus comprising:

• memory;
• and processing circuitry, configured to:
• decode, from a Next Generation Node-B (gNB), control signaling that includes a PDSCH-Config information element (IE) that configures the UE with a list of up to M Transmission Configuration Indication (TCI) states to decode a physical downlink shared channel (PDSCH) according to a detected physical downlink control channel (PDCCH) with downlink control information (DCI) intended for the UE and a given serving cell, wherein M depends on a capability of the UE,
• wherein each TCI state includes one or more parameters for configuring a quasi-colocation relationship between one or two downlink reference signals and demodulation reference signal (DM-RS) ports of the PDSCH;
• decode, from the gNB, downlink control information (DCI) that indicates a TCI state, from the list of TCI states, to be used by the UE;
• detect the PDCCH, wherein for DM-RS of the PDCCH, the TCI indicated in the DCI indicates a quasi co-location type that is one of:
• QCL-TypeA and QCL-TypeD;
• and
• decode the PDSCH, wherein for DM-RS of the PDSCH, the TCI indicated in the DCI indicates a quasi co-location type that is one of:
• QCL-TypeA and QCL-TypeD.