User equipment, base station, and communication method

A base station, comprising:

• transmission circuitry configured to transmit, to a user equipment (UE), a first radio resource control (RRC) parameter indicating first one or more zero power channel state information reference signal (ZP CSI-RS) resource sets and a second RRC parameter indicating second one or more ZP CSI-RS resource sets, and to transmit a DCI format scheduling a physical downlink shared channel (PDSCH);
• and
• control circuitry configured to:
• in a case that the DCI format is DCI format 1_0, determine one or more REs of the PDSCH overlapped with REs of the first one or more ZP CSI-RS resource sets or REs of the second one or more ZP CSI-RS resource sets as available REs for the PDSCH;
• in a case that the DCI format is DCI format 1_1, determine one or more REs of the PDSCH overlapped with REs of the second one or more ZP CSI-RS resource sets as available REs for the PDSCH, and determine whether one or more REs of the PDSCH overlapped with REs of the first one or more ZP CSI-RS resource sets as available REs for the PDSCH or as unavailable REs for the PDSCH at least based on a DCI field included in the DCI format 1_1;
• and
• in a case that the DCI format is DCI format 1_2, determine one or more REs of the PDSCH overlapped with REs of the first one or more ZP CSI-RS resource sets as available REs for the PDSCH, and determine whether one or more REs of the PDSCH overlapped with REs of the second one or more ZP CSI-RS resource sets as available REs for the PDSCH or as un available REs for the PDSCH at least based on a DCI field included in the DCI format 1_2.

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

• receiving, from a base station, a first radio resource control (RRC) parameter indicating first one or more zero power channel state information reference signal (ZP CSI-RS) resource sets and a second RRC parameter indicating second one or more ZP CSI-RS resource sets;
• receiving a DCI format scheduling a physical downlink shared channel (PDSCH);
• and
• in a case that the DCI format is DCI format 1_0, determining one or more REs of the PDSCH overlapped with REs of the first one or more ZP CSI-RS resource sets or REs of the second one or more ZP CSI-RS resource sets as available REs for the PDSCH;
• in a case that the DCI format is DCI format 1_1, determining one or more REs of the PDSCH overlapped with REs of the second one or more ZP CSI-RS resource sets as available REs for the PDSCH, and determining whether one or more REs of the PDSCH overlapped with REs of the first one or more ZP CSI-RS resource sets as available REs for the PDSCH or as unavailable REs for the PDSCH at least based on a DCI field included in the DCI format 1_1;
• and
• in a case that the DCI format is DCI format 1_2, determining one or more REs of the PDSCH overlapped with REs of the first one or more ZP CSI-RS resource sets as available REs for the PDSCH, and determining whether one or more REs of the PDSCH overlapped with REs of the second one or more ZP CSI-RS resource sets as available REs for the PDSCH or as un available REs for the PDSCH at least based on a DCI field included in the DCI format 1_2.