Method and apparatus for skipping uplink transmission in mobile communications

1. A method, comprising:

determining, by a processor of an apparatus, whether a periodic BSR is included in a PDU;

determining, by the processor, whether data is available for a logical channel group (LCG); and

skipping, by the processor, transmission of the PDU when the periodic BSR is included in the PDU and no data is available for the LCG.

2. The method of claim 1 , wherein the PDU comprises a medium access control (MAC) PDU, and wherein the MAC PDU comprises no MAC service data unit (SDU).

3. The method of claim 1 , further comprising:

receiving, by the processor, a configured grant; and

skipping, by the processor, transmission of the PDU on the configured grant.

4. The method of claim 1 , further comprising:

transmitting, by the processor, the PDU when the periodic BSR is included in the PDU and the data is available for the LCG,

wherein the PDU comprises solely the periodic BSR.

5. The method of claim 4 , further comprising:

receiving, by the processor, a configured grant; and

transmitting, by the processor, the PDU on the configured grant.

6. The method of claim 1 , further comprising:

receiving, by the processor, a logical channel restriction;

determining, by the processor, a restricted logical channel according to the logical channel restriction;

determining, by the processor, that data is available in the restricted logical channel; and

skipping, by the processor, transmission of the PDU when no data is included in the PDU.

7. The method of claim 1 , further comprising:

receiving, by the processor, a configuration to enable uplink transmission skipping.

8. The method of claim 7 , wherein the configuration is received via a radio resource control (RRC) signaling or a layer 1 (L1) signaling.

9. The method of claim 1 , wherein the skipping comprises not generating the PDU.

10. An apparatus, comprising:

a transceiver capable of wirelessly communicating with a plurality of nodes of a wireless network; and

a processor communicatively coupled to the transceiver, the processor capable of:

determining whether a periodic BSR is included in a PDU;

determining whether data is available for a logical channel group (LCG); and

skipping transmission of the PDU when the periodic BSR is included in the PDU and no data is available for the LCG.

11. The apparatus of claim 10 , wherein the PDU comprises a medium access control (MAC) PDU, and wherein the MAC PDU comprises no MAC service data unit (SDU).

12. The apparatus of claim 10 , wherein the processor is further capable of:

receiving, via the transceiver, a configured grant; and

skipping transmission of the PDU on the configured grant.

13. The apparatus of claim 10 , wherein the processor is further capable of:

transmitting, via the transceiver, the PDU when the periodic BSR is included in the second PDU and the data is available for the LCG,

wherein the PDU comprises solely the periodic BSR.

14. The apparatus of claim 13 , wherein the processor is further capable of:

receiving, via the transceiver, a configured grant; and

transmitting, via the transceiver, the PDU on the configured grant.

15. The apparatus of claim 10 , wherein the processor is further capable of:

receiving, via the transceiver, a logical channel restriction;

determining a restricted logical channel according to the logical channel restriction;

determining that data is available in the restricted logical channel; and

skipping transmission of the PDU when no data is included in the PDU.

16. The apparatus of claim 10 , wherein the processor is further capable of:

receiving, via the transceiver, a configuration to enable uplink transmission skipping.

17. The apparatus of claim 16 , wherein the configuration is received via a radio resource control (RRC) signaling or a layer 1 (L1) signaling.

18. The apparatus of claim 10 , wherein, in skipping transmission of the PDU, the processor is capable of not generating the PDU.