Transport block transmission
Apparatuses, methods, and systems are disclosed for transport block transmission. One method includes determining a failure of a listen-before-talk procedure for transmission of a transport block on a configured uplink grant at a first transmission opportunity associated with a hybrid automatic repeat request process. The method includes, in response to determining the failure of the listen-before-talk procedure, not transmitting the transport block on the configured uplink grant at the first transmission opportunity corresponding to the listen-before-talk procedure. The method includes autonomously triggering transmission of the transport block in a second transmission opportunity using the hybrid automatic repeat request process, wherein autonomously triggering the transmission comprises triggering the transmission without receiving network signaling for the transmission and, the second transmission opportunity occurs after the first transmission opportunity.
1. A method of a user equipment, the method comprising:
determining a failure of a listen-before-talk procedure for transmission of a transport block and associated uplink control information on a configured uplink grant at a first transmission opportunity associated with a hybrid automatic repeat request process;
in response to determining the failure of the listen-before-talk procedure, not transmitting the transport block on the configured uplink grant at the first transmission opportunity corresponding to the listen-before-talk procedure; and
autonomously triggering retransmission of the same transport block and the associated uplink control information in a second transmission opportunity using the hybrid automatic repeat request process without regenerating the transport block in response to a trigger condition, wherein autonomously triggering the retransmission comprises triggering the transmission without receiving network signaling for the transmission, the trigger condition comprises determining that the hybrid automatic repeat request process is pending and determining that the first transmission opportunity for the hybrid automatic repeat request process is the configured uplink grant, the second transmission opportunity occurs after the first transmission opportunity, and the second transmission opportunity is a second configured uplink grant.
2. The method of claim 1 , wherein the second transmission opportunity is a next available transmission opportunity after the first transmission opportunity.
3. The method of claim 1 , wherein the second transmission opportunity is a configured grant resource.
4. The method of claim 1 , wherein the second transmission opportunity is a scheduled grant resource.
5. The method of claim 1 , wherein a configured grant timer is not started in response to determining the failure of the listen-before-talk procedure.
6. The method of claim 1 , wherein the hybrid automatic repeat request process is pending in response to determining the failure of the listen-before-talk procedure and not transmitting the transport block.
7. The method of claim 1 , wherein a new data indicator bit for the hybrid automatic repeat request process is not toggled at the second transmission opportunity.
8. The method of claim 1 , wherein the transport block is transmitted at the second transmission opportunity as a retransmission.
9. An apparatus comprising a user equipment, the apparatus further comprising:
a processor that:
determines a failure of a listen-before-talk procedure for transmission of a transport block and associated uplink control information on a configured uplink grant at a first transmission opportunity associated with a hybrid automatic repeat request process;
in response to determining the failure of the listen-before-talk procedure, does not initiate transmission of the transport block on the configured uplink grant at the first transmission opportunity corresponding to the listen-before-talk procedure; and
autonomously triggers retransmission of the same transport block and the associated uplink control information in a second transmission opportunity using the hybrid automatic repeat request process without regenerating the transport block in response to a trigger condition, wherein autonomously triggering the retransmission comprises triggering the transmission without receiving network signaling for the transmission, the trigger condition comprises determining that the hybrid automatic repeat request process is pending and determining that the first transmission opportunity for the hybrid automatic repeat request process is the configured uplink grant, the second transmission opportunity occurs after the first transmission opportunity, and the second transmission opportunity is a second configured uplink grant.
10. The apparatus of claim 9 , wherein the second transmission opportunity is a next available transmission opportunity after the first transmission opportunity.
11. The apparatus of claim 9 , wherein the second transmission opportunity is a configured grant resource.
12. The apparatus of claim 9 , wherein the second transmission opportunity is a scheduled grant resource.
13. The apparatus of claim 9 , wherein a configured grant timer is not started in response to determining the failure of the listen-before-talk procedure.
14. The apparatus of claim 9 , wherein the hybrid automatic repeat request process is pending in response to determining the failure of the listen-before-talk procedure and not transmitting the transport block.
15. The apparatus of claim 9 , wherein a new data indicator bit for the hybrid automatic repeat request process is not toggled at the second transmission opportunity.
16. The apparatus of claim 9 , wherein the transport block is transmitted at the second transmission opportunity as a retransmission.