Method and apparatus for confirmation of multiple configured grants for sidelink in a wireless communication system

A wireless device in a wireless communication system comprising:

• a transceiver;
• a memory;
• and
• at least one processor operatively coupled to the transceiver and the memory, and configured to:
• control the transceiver to receive, from a network, configuration of multiple configured grants for sidelink;
• control the transceiver to transmit, to the network, a first Medium Access Control (MAC) protocol data unit (PDU) including a first Configured Grant Confirmation MAC Control Element (CE);
• control the transceiver to receive activation command or deactivation command on PDCCH for at least one of the multiple configured grants;
• trigger a specific configured grant confirmation upon receiving the activation command or the deactivation command, wherein the specific configured grant confirmation corresponds to the at least one of the multiple configured grants;
• generate a second MAC PDU including a second Configured Grant Confirmation MAC CE
• wherein the second Configured Grant Confirmation MAC CE includes at least one confirmation up to a last event that triggered the first Configured Grant Confirmation MAC CE prior to the second MAC PDU;
• cancel the triggered specific configured grant confirmation, which is prior to the second MAC PDU, based on that (i) a handover is performed, (ii) a serving cell change is performed, and/or (iii) a beam failure is detected;
• and
• control the transceiver to transmit, to the network, a the second MAC PDU including the second Configured Grant Confirmation MAC CE,
• wherein the second Configured Grant Confirmation MAC CE includes one or more fields in a bit group of which size is equal to number of the multiple configured grants,
• wherein each field in the bit group is set to (i) zero to indicate deactivation for each of the multiple configured grants or (ii) 1 to indicate activation for each of the multiple configured grants, and
• wherein each field in the second Configured Grant Confirmation MAC CE except the bit group is ignored.

A processor for a wireless device in a wireless communication system, wherein the processor is configured to control the wireless device to perform operations comprising:

• receiving, from a network, configuration of multiple configured grants for sidelink;
• transmitting, to the network, a first Medium Access Control (MAC) protocol data unit (PDU) including a first Configured Grant Confirmation MAC Control Element (CE);
• receiving activation command or deactivation command on Physical Downlink Control Channel (PDCCH) for at least one of the multiple configured grants;
• triggering a specific configured grant confirmation upon receiving the activation command or the deactivation command, wherein the specific configured grant confirmation corresponds to the at least one of the multiple configured grants;
• generating a second MAC PDU including a second Configured Grant Confirmation MAC CE,
• wherein the second Configured Grant Confirmation MAC CE includes at least one confirmation up to a last event that triggered the first Configured Grant Confirmation MAC CE prior to the second MAC PDU;
• canceling the triggered specific configured grant confirmation, which is prior to the second MAC PDU, based on that (i) a handover is performed, (ii) a serving cell change is performed, and/or (iii) a beam failure is detected;
• and
• transmitting, to the network, the second MAC PDU including the second Configured Grant Confirmation,
• wherein the second Configured Grant Confirmation MAC CE includes one or more fields in a bit group of which size is equal to number of the multiple configured grants,
• wherein each field in the bit group is set to (i) zero to indicate deactivation for each of the multiple configured grants or (ii) 1 to indicate activation for each of the multiple configured grants, and
• wherein each field in the second Configured Grant Confirmation MAC CE except the bit group is ignored.