Uplink scheduling for license assisted access

An apparatus of an evolved node B (eNB) comprising control circuitry configured to:

• determine that a first channel is idle based on a sensing of the first channel for a first period of time;
• initiate, based on the determination that the first channel is idle, a reservation signal on the first channel for a second period of time following the first period of time;
• initiate transmission of an uplink grant to a first user equipment (UE), the uplink grant associated with the first channel and a third period of time following the second period of time;
• and
• initiate sensing of the first channel during the third period of time to detect a physical uplink shared channel (PUSCH) transmission associated with the uplink grant;
• and
• generate a hybrid automatic repeat request for transmission to the first UE in response to the sensing of the first channel.

A computer readable medium comprising instructions that, when executed by one or more processors, configure a user equipment (UE) for license assisted access communication with an evolved node B (eNB), the instructions to configure the UE to:

• receive, from the eNB, an uplink grant associated with a first unlicensed channel and a first period of time;
• determine that the first unlicensed channel is available for a physical uplink shared channel (PUSCH) transmission during the first period of time;
• transmit the PUSCH transmission to the eNB during the first period of time;
• and
• receive a hybrid automatic repeat request associated with the PUSCH transmission from the eNB.

An apparatus of an user equipment (UE) configured for license assisted access communications with an evolved node B (eNB), the UE comprising:

• receive circuitry configured to receive, from the eNB, an uplink grant for a physical uplink shared channel (PUSCH) transmission, and further configured to receive, from the eNB, and to receive an asynchronous hybrid automatic repeat request (HARQ) associated with the PUSCH transmission;
• control circuitry configured to determine that the first unlicensed channel is available for the PUSCH transmission;
• and
• transmit circuitry configured to transmit the PUSCH transmission to the eNB in response to the control circuitry determining that the first unlicensed channel is available for the PUSCH transmission.