Quasi-Co-Located Assumption for Aperiodic CSI-RS for Multi-TRP Operation

An apparatus, comprising:

• a processor configured to cause a wireless device to:
• receive downlink control information (DCI);
• determine a first quasi-co-located (QCL) assumption for aperiodic channel state information reference signals (CSI-RS) for the DCI;
• and
• buffer received signals according to the first QCL assumption for aperiodic CSI-RS if a scheduling offset for the DCI is below a scheduling offset threshold.

A wireless device, comprising:

• an antenna;
• a radio operably coupled to the antenna;
• and
• a processor operably coupled to the radio;
• wherein the processor is configured to cause the wireless device to:
• receive downlink control information (DCI);
• determine a first quasi-co-located (QCL) assumption for aperiodic channel state information reference signals (CSI-RS) for the DCI;
• and
• buffer received signals according to the first QCL assumption for aperiodic CSI-RS if a scheduling offset for the DCI is below a scheduling offset threshold.

A method, comprising:

• establishing wireless links with multiple transmission-reception-points (TRPs) of a cellular network according to a multi-TRP configuration;
• receiving downlink control information (DCI);
• determining a first quasi-co-located (QCL) assumption for aperiodic channel state information reference signals (CSI-RS) for the DCI;
• and
• buffering received signals according to the first QCL assumption for aperiodic CSI-RS if a scheduling offset for the DCI is below a scheduling offset threshold.