Method and apparatus for sidelink transmission with beamforming in a wireless communication system

A method for a first User Equipment (UE) performing sidelink transmission in a sidelink resource pool, comprising:

• performing one or more unicast sidelink transmissions with one or more destinations, wherein the first UE determines to apply one transmitted beam for sidelink transmission to each of the one or more destinations;
• receiving one or more messages from the one or more destinations, wherein each message of the one or more messages indicates a monitoring pattern associated with the one transmitted beam and information of Transmission Time Intervals (TTIs) that one of the one or more destinations monitors sidelink transmission via a received beam associated with the one transmitted beam;
• having sidelink data available associated with a subset of the one or more destinations;
• receiving a sidelink grant from a network node scheduling one or more sidelink resources in one or more TTIs;
• and
• selecting or determining a destination from the subset of the one or more destination, wherein the first UE selects or determines the destination based on at least the received one or more messages that the destination monitors via a received beam associated with the one transmitted beam in a TTI among the one or more TTIs.

A first User Equipment (UE) performing sidelink transmission in a sidelink resource pool, comprising:

• a memory;
• and
• a processor operatively coupled with the memory, wherein the processor is configured to execute a program code to:
• perform one or more unicast sidelink transmissions with one or more destinations comprising a second destination associated with a second UE;
• and
• transmit information indicating a set of Transmission Time Intervals (TTIs) to a network node, wherein the set of TTIs corresponds to the second UE monitoring or receiving Sidelink Control Information (SCI) in the sidelink resource pool via a second beam associated with the first UE.