Method and apparatus for resource allocation and bandwidth part inactivity timer handling for vehicle-to-everything communication

A user equipment (UE) in a wireless communication system, the UE comprising:

• at least one transceiver;
• and
• at least one processor configured to:
• identify that a plurality of serving cells is configured,
• receive a physical downlink control channel (PDCCH) on an active downlink (DL) bandwidth part (BWP) of a first serving cell, wherein the PDCCH is addressed to a sidelink (SL) vehicle-radio network temporary identifier (SL-V-RNTI) or SL-semi persistent scheduling-vehicle-radio network temporary identifier (SL-SPS-V-RNTI), and indicates an SL grant for a BWP of a second serving cell, and
• start a BWP inactivity timer associated with an active DL BWP of the second serving cell.

A method performed by a base station in a wireless communication system, the method comprising:

• configuring, to a user equipment (UE), a plurality of serving cells;
• and
• transmitting, to the UE, a physical downlink control channel (PDCCH) on an active downlink (DL) bandwidth part (BWP) of a first serving cell,
• wherein the PDCCH is addressed to a sidelink (SL) vehicle-radio network temporary identifier (SL-V-RNTI) or SL-semi persistent scheduling-vehicle-radio network temporary identifier (SL-SPS-V-RNTI), and indicates an SL grant for a BWP of a second serving cell, and
• wherein a BWP inactivity timer associated with an active DL BWP of the second serving cell starts.

A base station in a wireless communication system, the base station comprising:

• at least one transceiver;
• and
• at least one processor configured to:
• configure, to a user equipment (UE), a plurality of serving cells, and
• transmit, to the UE, a physical downlink control channel (PDCCH) on an active downlink (DL) bandwidth part (BWP) of a first serving cell,
• wherein the PDCCH is addressed to a sidelink (SL) vehicle-radio network temporary identifier (SL-V-RNTI) or SL-semi persistent scheduling-vehicle-radio network temporary identifier (SL-SPS-V-RNTI), and indicates an SL grant for a BWP of a second serving cell, and
• wherein a BWP inactivity timer associated with an active DL BWP of the second serving cell starts.