Method and apparatus for beam management in wireless network

A Base Station comprising:

• a processor;
• a transmitter;
• and a receiver;
• the processor and the transmitter configured to transmit a first signaling, the first signaling being used to determine a target time;
• the processor and the transmitter configured to transmit a first reference signal, wherein the first reference signal belongs to one of a first reference signal set or a second reference signal set;
• the processor and the transmitter configured to transmit a Physical Downlink Control Channel (PDCCH) transmission in a target resource pool subset after the target time, wherein the target resource pool subset comprises at least one Control Resource Set (CORESET), or, drop transmitting a first-type channel in a target resource pool subset after the target time, wherein the target resource pool subset is one of a first resource pool subset of a first resource pool set or a second resource pool subset of the first resource pool set,
• wherein, when the first reference signal belongs to the first reference signal set, the target resource pool subset is the first resource pool subset,
• wherein, when the first reference signal belongs to the second reference signal set, the target resource pool subset is the second resource pool subset, and
• wherein, the at least one CORESET and the first reference signal have a Quasi Co-Location (QCL) relationship.

The Base Station according of 6, wherein the processor, the transmitter, and a receiver are configured to:

• transmit a first signal;
• or
• receive a third signal;
• wherein the first signaling is used to determine scheduling information of the first signal, wherein the third signal is used to determine that the first signaling is correctly received, wherein time-domain resources occupied by the third signal are used to determine the target time, and wherein the first signaling is used to determine the time-domain resources occupied by the third signal.

A method performed by a User Equipment (UE), the method comprising:

• receiving a first signaling;
• determining a first reference signal based on the first signaling, wherein the first reference signal belongs to a first reference signal set or a second reference signal set
• determining, based on whether the first reference signal belongs to the first reference signal set or the second reference signal set, one or more Control Resource Sets (CORESETs) in which a Quasi Co-Location (QCL) relationship with the first reference signal is assumed when monitoring a Physical Downlink Control Channel (PDCCH) after a target time;
• determine the target time based on the first signaling;
• and
• monitoring the PDCCH after the target time in a first resource pool set, that comprises a first resource pool subset and a second resource pool subset, wherein the determined one or more CORESETSs are part of a target resource pool subset,
• wherein, when the first reference signal belongs to the first reference signal set, the target resource pool subset is the first resource pool subset, and
• wherein, when the first reference signal belongs to the second reference signal set, the target resource pool subset is the second resource pool subset.