Frame structure for uplink scheduling
An arrangement configured to be employed within a user equipment (UE). The arrangement includes control circuitry. The control circuitry is configured perform a clear channel assessment (CCA) during a data transmission with an evolved Node B (eNodeB), generate a clear channel indicator (CCI) based on the CCA, orthogonally multiplex an acknowledgement (ACK)/negative acknowledgement (NACK) with the CCI, where different sequences are allocated to the CCI and/or different resource block (RB) resources are allocated to the CCI, code and modulate a physical uplink control channel (PUCCH) using the multiplexed ACK/NACK, and provide the PUCCH having the CCI within the data transmission.
1. An arrangement configured to be employed within a user equipment (UE), the arrangement comprising:
control circuitry configured to
perform a clear channel assessment (CCA) during a data transmission with an evolved Node B (eNodeB);
generate a clear channel indicator (CCI) based on the CCA;
orthogonally multiplex an acknowledgement (ACK)/ negative acknowledgement (NACK) with the CCI, where different sequences are allocated to the CCI and/or different resource block (RB) resources are allocated to the CCI;
code and modulate a physical uplink control channel (PUCCH) using the multiplexed ACK/NACK; and
provide the PUCCH having the CCI within the data transmission.
2. The arrangement of claim 1 , wherein the control circuitry is configured to perform the CCA towards an end of the data transmission.
3. The arrangement of claim 1 , wherein the control circuitry is configured to perform the CCA during a gap in the data transmission.
4. The arrangement of claim 1 , wherein the CCI indicates that an entire bandwidth is clear and the CCA has passed a threshold value.
5. The arrangement of claim 1 , wherein the CCI indicates that each channel of a bandwidth is clear.
6. The arrangement of claim 1 , wherein the CCI only indicates that a primary channel of a bandwidth is clear.
7. The arrangement of claim 1 , wherein the control circuitry is configured to sense component carriers configured by one or more higher layers.
8. The arrangement of claim 7 , wherein the component carriers are configured using radio resource control (RRC) signaling.
9. The arrangement of claim 1 , wherein the control circuitry is configured to orthogonally multiplex the ACK/NACK with the CCI and a scheduling request (SR).
10. The arrangement of claim 1 , further comprising a transceiver configured to transmit the PUCCH having the CCI.
11. The arrangement of claim 1 , wherein the data transmission is on an unlicensed band.
12. The arrangement of claim 1 , wherein the data transmission is on a Wi-Fi band.
13. An arrangement configured to be employed within an evolved Node B (eNodeB), the arrangement comprising:
control circuitry configured to
perform a clear channel assessment (CCA) to select an unlicensed band for a data transmission with a user equipment (UE);
initiate the data transmission with the UE; and
receive a physical uplink control channel (PUCCH) from the UE, wherein the PUCCH includes a clear channel indicator (CCI) and a scheduling request (SR) and the PUCCH identifies a selected channel for uplink data, wherein the CCI identifies the selected unlicensed band and an available time for an uplink data communication.
14. The arrangement of claim 13 , wherein the control circuitry is configured to receive a physical uplink shared channel (PUSCH) according to the CCI and the SR.
15. The arrangement of claim 13 , wherein the control circuitry is configured to hold the unlicensed band for a duration using one or more digital reference signals (DRS).
16. The arrangement of claim 13 , wherein the control circuitry is configured to hold the unlicensed band for a duration by using a Wi-Fi self-CTS packet.
17. The arrangement of claim 13 , wherein the UE is configured to select a channel for the uplink data and generate the CCI according to the selected channel.
18. One or more computer-readable non-transitory media having instructions that, when executed, cause one or more user equipment (UEs) to:
select a channel for uplink data during at least a portion of a data transmission;
generate a clear channel indicator (CCI) according to the selected channel for the uplink data;
multiplex an acknowledgement (ACK)/ negative acknowledgement (NACK) with the CCI and a scheduling request (SR);
code and modulate a physical uplink control channel (PUCCH) using the multiplexed ACK/NACK; and
transmit the PUCCH having the CCI with the data transmission.
19. The computer-readable media of claim 18 , comprising one or more computer-readable media having instructions that, when executed, further cause the one or more user equipment (UEs) to:
transmit the uplink data according to the CCI and the SR.
20. The computer-readable media of claim 18 , wherein the PUCCH is coded and modulated using the PUCCH format 1 for ACK/NACK transmissions.
21. The computer-readable media of claim 18 , wherein the CCI and the SR indicate a start time for the uplink data.