Method and apparatus for resource mapping of PDSCH on unlicensed spectrum

A base station (BS) in a wireless communication system supporting shared spectrum channel access, the BS comprising:

• at least one processor configured to determine a window for synchronize signal/physical broadcast channel (SS/PBCH) block transmission, a bitmap for SS/PBCH blocks (ssb-PositionsInBurst), and a parameter for quasi-co-location (QCL) assumption Q;
• and
• at least one transceiver operably connected to the at least one processor, the at least one transceiver configured to transmit, to a user equipment (UE), a set of downlink channels including the window for the SS/PBCH block transmission, the bitmap for ssb-PositionsInBurst, and the parameter for QCL assumption Q,
• wherein the at least one processor is further configured to:
• indicate, to the UE, a SS/PBCH block, based on the window for the SS/PBCH block transmission, the bitmap for ssb-PositionsInBurst, and the parameter for QCL assumption Q, the SS/PBCH block that is identified in the window for the SS/PBCH block transmission being determined, at the UE, as one of:
• a first set of SS/PBCH blocks assumed to be transmitted by the BS, or
• a second set of SS/PBCH blocks assumed to be transmitted by the BS, and
• determine a set of resources that is not available for at least one physical downlink shared channel (PDSCH) as overlapped with the first set of SS/PBCH blocks, and
• wherein the at least one transceiver is further configured to transmit, to the UE, the at least one PDSCH using other resources than the determined set of resources.

A method of a user equipment (UE) in a wireless communication system supporting shared spectrum channel access, the method comprising:

• receiving, from a base station (BS), a set of downlink channels supporting the shared spectrum channel access;
• identifying, from the set of downlink channels, a window for synchronization signal/physical broadcast channel (SS/PBCH) block transmission, a bitmap for SS/PBCH blocks (ssb-PositionsInBurst), and a parameter for quasi-co-location (QCL) assumption Q;
• determining, based on the identified window for the SS/PBCH block transmission, the identified bitmap for the ssb-PositionsInBurst, and the identified parameter for the QCL assumption Q, a SS/PBCH block in the identified window for the SS/PBCH block transmission as one of:
• a first set of SS/PBCH blocks assumed to be transmitted by the BS, or
• a second set of SS/PBCH blocks not transmitted by the BS;
• determining a set of resources that is not available for at least one physical downlink shared channel (PDSCH) as overlapped with the first set of SS/PBCH blocks;
• and
• receiving, from the BS, the at least one PDSCH based on resource other than the determined set of resources.