Techniques for uplink transmission management

A user equipment (UE), comprising:

• a memory;
• a transceiver, and
• one or more processors operatively coupled with the memory and the transceiver, the one or more processors configured to:
• receive, via the transceiver, a first explicit uplink grant for transmission of a first protocol data unit (PDU) associated with a first Hybrid Automatic Repeat Request (HARQ) process;
• receive, via the transceiver, a second explicit uplink grant for transmission of a second PDU associated with a second HARQ process, the second explicit uplink grant being received subsequent to the first explicit uplink grant;
• perform a first clear channel assessment (CCA) in response to the first explicit uplink grant in a first time slot;
• perform a second CCA in response to the second explicit uplink grant in a second time slot;
• and
• determine, in response to the first CCA failing and the second CCA succeeding, whether to transmit the first PDU or the second PDU in a time slot subsequent to the second time slot over an unlicensed spectrum or a shared spectrum.

A non-transitory computer readable medium having instructions stored therein that, in response to execution by one or more processors, cause the one or more processors to:

• receive a first explicit uplink grant for transmission of a first protocol data unit (PDU) associated with a first Hybrid Automatic Repeat Request (HARQ) process;
• receive a second explicit uplink grant for transmission of a second PDU associated with a second HARQ process, the second explicit uplink grant being received subsequent to the first explicit uplink grant;
• perform a first clear channel assessment (CCA) in response to the first explicit uplink grant in a first time slot;
• perform a second CCA in response to the second explicit uplink grant in a second time slot;
• and
• determine, in response to the first CCA failing and the second CCA succeeding, whether to transmit the first PDU or the second PDU in a time slot subsequent to the second time slot over an unlicensed spectrum or a shared spectrum.

A user equipment (UE), comprising:

• means for receiving a first explicit uplink grant for transmission of a first protocol data unit (PDU) associated with a first Hybrid Automatic Repeat Request (HARQ) process;
• means for receiving a second explicit uplink grant for transmission of a second PDU associated with a second HARQ process, the second explicit uplink grant being received subsequent to the first explicit uplink grant;
• means for performing a first clear channel assessment (CCA) in response to the first explicit uplink grant in a first time slot;
• means for performing a second CCA in response to the second explicit uplink grant in a second time slot;
• and
• means for determining, if the first CCA fails and the second CCA succeeds, whether to transmit the first PDU or the second PDU in a time slot subsequent to the second time slot over an unlicensed spectrum or a shared spectrum.