System and Method for Handling of an Uplink Transmission Collision with an Ack/Nack Signal

1. A method of operating a user equipment (UE) in a wireless communications network, the method comprising: determining, by the UE, a potential collision between a scheduled uplink transmission and an uplink transmission of an acknowledgement/negative acknowledgement (ACK/NACK) signal, both the scheduled uplink transmission and the uplink transmission of ACK/NACK are to be transmitted by the UE; in response to determining the potential collision, refraining, by the UE, from transmitting the scheduled uplink transmission; delivering, by the UE, an ACK for the scheduled uplink transmission from a physical layer to higher layers; and refraining, by the UE, from transmitting a subsequent non-adaptive retransmission for the scheduled uplink transmission.

2. The method of claim 1 , wherein the higher layers comprise a medium access control (MAC) layer.

3. The method of claim 1 , further comprising identifying, by a medium access control (MAC) layer of the UE, a collision between the scheduled uplink transmission and the ACK/NACK signal.

4. The method of claim 3 , further comprising setting a hybrid automatic repeat request (HARQ) feedback for the scheduled uplink transmission to an ACK by an HARQ process.

5. The method of claim 1 , further comprising transmitting a subsequent adaptive retransmission for the scheduled uplink transmission.

6. The method of claim 1 , wherein the scheduled uplink transmission is a scheduled physical uplink shared channel (PUSCH) transmission.

7. The method of claim 1 , wherein the ACK/NACK signal is transmitted on an uplink in response to a physical downlink shared channel (PDSCH) reception.

8. The method of claim 1 , wherein the ACK/NACK signal is a part of an ACK/NACK repetition sequence.

9. The method of claim 8 , wherein the ACK/NACK repetition sequence comprises the ACK/NACK signal repeated 2, 4, or 6 times in consecutive uplink subframes.

10. A user equipment (UE) for operating in a wireless communications network, comprising one or more processors configured to: determine a potential collision between a scheduled uplink transmission and an uplink transmission of an acknowledgement/negative acknowledgement (ACK/NACK) signal, both the scheduled uplink transmission and the uplink transmission of ACK/NACK are to be transmitted by the UE; in response to determining the potential collision: refrain from transmitting the scheduled uplink transmission; deliver an ACK for the scheduled uplink transmission from a physical layer to higher layers; and refrain from transmitting a subsequent non-adaptive retransmission for the scheduled uplink transmission.

11. The user equipment of claim 10 , wherein the higher layers comprise a medium access control (MAC) layer.

12. The user equipment of claim 10 , the one or more processors further configured to identify, by a medium access control (MAC) layer, a collision between the scheduled uplink transmission and the ACK/NACK signal.

13. The user equipment of claim 10 , the one or more processors further configured to set a hybrid automatic repeat request (HARQ) feedback for the scheduled uplink transmission to an ACK by an HARQ process.

14. The user equipment of claim 10 , the one or more processors further configured to transmit a subsequent adaptive retransmission for the scheduled uplink transmission.

15. The user equipment of claim 10 , wherein the scheduled uplink transmission is a scheduled physical uplink shared channel (PUSCH) transmission.

16. The user equipment of claim 10 , wherein the ACK/NACK signal is transmitted on an uplink in response to a physical downlink shared channel (PDSCH) reception.

17. The user equipment of claim 10 , wherein the ACK/NACK signal is a part of an ACK/NACK repetition sequence.

18. The user equipment of claim 17 , wherein the ACK/NACK repetition sequence comprises the ACK/NACK signal repeated 2, 4, or 6 times in consecutive uplink subframes.