Configured grant improvement for new radio (NR) unlicensed

1. A user equipment (UE), comprising:

radio front end circuitry; and

processor circuitry, coupled to the radio front end circuitry, and configured to:

receive, using the radio front end circuitry, a message from a base station (BS);

based on the received message, determine whether to use a lowest Channel Access Priority Class (CAPC) or a highest CAPC;

in response to a determination to use the lowest CAPC, select a CAPC based on the lowest CAPC of one or more Media Access Control (MAC) Service Data Units (SDUs) that are multiplexed in one or more MAC Protocol Data Units (PDUs) for an uplink (UL) transmission;

in response to a determination to use the highest CAPC, select the CAPC based on the highest CAPC of the one or more MAC SDUs that are multiplexed in the MAC PDU for the UL transmission; and

transmit, using the radio front end circuitry, the MAC PDU to the BS,

wherein the message indicates to use the lowest CAPC in response to an access point (AP) associated with a wireless network being detected, and wherein the AP is associated with the UE or the BS.

2. The UE of claim 1 , wherein the message indicates to use the highest CAPC in response to the access point (AP) associated with the wireless network not being detected.

3. The UE of claim 1 , wherein the UL transmission corresponds to at least one of a configured grant or a dynamic grant.

4. The UE of claim 3 , wherein the MAC PDU comprises a first MAC PDU and a second MAC PDU, and

wherein the processor circuitry is further configured to:

multiplex control signaling into the first MAC PDU;

multiplex data signaling into the second MAC PDU;

transmit the first MAC PDU using the dynamic grant; and

transmit the second MAC PDU using the configured grant.

5. The UE of claim 4 , wherein the control signaling comprises at least one of a MAC control element (CE), a Signaling Radio Bearer (SRB), or a Data Radio Bearer (DRB) with the highest CACP.

6. The UE of claim 4 , wherein the data signaling comprises a Data Radio Bearer (DRB) not having the highest CACP.

7. The UE of claim 1 , wherein the processor circuitry is configured to start or restart a configured grant timer and a configured grant retransmission timer at a same time.

8. The UE of claim 7 , wherein the processor circuitry is configured to restart the configured grant timer when the configured grant timer expires and run the configured grant retransmission timer for a predefined number of configured grant retransmissions.

9. A method, comprising:

receiving, at a user equipment (UE), a message from a base station (BS);

based on the received message, determining whether to use a lowest Channel Access Priority Class (CAPC) or a highest CAPC;

in response to determining to use the lowest CAPC, selecting a CAPC based on the lowest CAPC of one or more Media Access Control (MAC) Service Data Units (SDUs) that are multiplexed in one or more MAC Protocol Data Units (PDUs) for an uplink (UL) transmission;

in response to determining to use the highest CAPC, selecting the CAPC based on the highest CAPC of the one or more MAC SDUs that are multiplexed in the MAC PDU for the UL transmission; and

transmitting the MAC PDU to the BS,

wherein the message indicates to use the lowest CAPC in response to an access point (AP) associated with a wireless network being detected, and wherein the AP is associated with the UE or the BS.

10. The method of claim 9 , wherein the message indicates to use the highest CAPC in response to the access point (AP) associated with the wireless network not being detected.

11. The method of claim 9 , wherein the UL transmission corresponds to at least one of a configured grant or a dynamic grant.

12. The method of claim 11 , wherein the MAC PDU comprises a first MAC PDU and a second MAC PDU, and

wherein the method further comprises:

multiplexing control signaling into the first MAC PDU;

multiplexing data signaling into the second MAC PDU;

transmitting the first MAC PDU using the dynamic grant; and

transmitting the second MAC PDU using the configured grant.

13. The method of claim 12 , wherein the control signaling comprises at least one of a MAC control element (CE), a Signaling Radio Bearer (SRB), or a Data Radio Bearer (DRB) with the highest CACP, and

wherein the data signaling comprises a Data Radio Bearer (DRB) not having the highest CACP.

14. The method of claim 9 , further comprising:

starting or restarting a configured grant timer and a configured grant retransmission timer at a same time.

15. The method of claim 14 , further comprising:

restarting the configured grant timer when the configured grant timer expires; and

running the configured grant retransmission timer for a predefined number of configured grant retransmissions.

16. A base station (BS), comprising:

radio front end circuitry; and

processor circuitry, coupled to the radio front end circuitry, and configured to:

determine whether an access point (AP) associated with a wireless network is detected;

generate a message for a user equipment (UE),

wherein the message comprises a parameter set to a lowest Channel Access Priority Class (CAPC) in response to detecting the AP or is set to a highest CAPC in response to not detecting the AP; and

transmit, using the radio front end circuitry, the message to the UE.

17. The BS of claim 16 , wherein the processor circuitry is configured to transmit the message using an uplink (UL) grant procedure.

18. The BS of claim 16 , wherein the message comprises an information element included in an RRCReconfiguration message.