Adaptive autonomous uplink communication design

1. A method of wireless communication, comprising:

receiving, by a first wireless communication device from a second wireless communication device, an autonomous uplink transmission configuration;

determining, by the first wireless communication device in response to the autonomous uplink transmission configuration and a link adaptation parameter associated with at least one of a path loss or a channel estimate, a transmission parameter including at least one of a modulation coding scheme (MCS), a pre-coding matrix indicator (PMI), or a rank indicator (RI); and

transmitting, by the first wireless communication device to the second wireless communication device, an autonomous uplink communication signal based on the determined transmission parameter.

2. The method of claim 1 , wherein the autonomous uplink transmission configuration includes at least one of a second MCS, a second RI, a second PMI, a waveform type, a resource allocation, or a transmission starting time, and wherein the determining includes:

selecting the transmission parameter from the autonomous uplink transmission configuration.

3. The method of claim 1 , further comprising:

receiving, by the first wireless communication device from the second wireless communication device, a channel parameter associated with the link adaptation parameter, the channel parameter including at least one of noise information, interference information, or acknowledgement/negative-acknowledgement (ACK/NACK) feedback information,

wherein the determining is further based on the received channel parameter.

4. The method of claim 1 , further comprising:

receiving, by the first wireless communication device from the second wireless communication device, one or more downlink measurement signals,

wherein the determining the transmission parameter includes:

determining, by the first wireless communication device, the at least one of the MCS, the PMI, or the RI based on the one or more received downlink measurement signals associated with the link adaptation parameter.

5. The method of claim 4 , wherein the one or more downlink measurement signals include at least one of a reference signal or a synchronization signal, or a broadcast system information signal.

6. The method of claim 4 , further comprising:

determining, by the first wireless communication device, the at least one of the path loss or the channel estimate based on the one or more received downlink measurement signals.

7. A method of wireless communication, comprising:

receiving, by a first wireless communication device from a second wireless communication device, an autonomous uplink transmission configuration;

transmitting, by the first wireless communication device to the second wireless communication device, one or more communication signals;

receiving, by the first wireless communication device from the second wireless communication device, one or more feedbacks corresponding to the one or more communication signals;

determining, by the first wireless communication device, a feedback metric based on at least one of a number of acknowledgements (ACKs) or a number of negative-acknowledgements (NACK) in the one or more feedbacks corresponding to the one or more communication signals;

determining, by the first wireless communication device in response to the autonomous uplink transmission configuration and a link adaptation parameter associated with the feedback metric, a transmission parameter including at least one of a modulation coding scheme (MCS), a pre-coding matrix indicator (PMI), or a rank indicator (RI); and

transmitting, by the first wireless communication device to the second wireless communication device, an autonomous uplink communication signal based on the determined transmission parameter.

8. The method of claim 1 , wherein the link adaptation parameter includes at least one of a time-frequency resource metric and a transmission power metric, and wherein the determining is further based on at least one of:

a transmission buffer status of the first wireless communication device associated with the time-frequency resource metric; or

a power headroom parameter of the first wireless communication device associated with the transmission power metric.

9. The method of claim 1 ,

wherein the autonomous uplink transmission configuration further includes at least one of a plurality of allowable starting transmission symbols or a plurality of allowable ending transmission symbols within a time period,

wherein the method further comprises:

performing, by the first wireless communication device, a listen-before-talk (LBT) in a spectrum shared by multiple network operating entities, and wherein the determining includes:

selecting, by the first wireless communication device, a starting time for transmitting the autonomous uplink communication signal based on the LBT and the at least one of the plurality of allowable starting transmission symbols or the plurality of allowable ending transmission symbols.

10. The method of claim 1 , further comprising:

transmitting, by the first wireless communication device to the second wireless communication device, uplink control information including information associated with the determined transmission parameter.

11. The method of claim 1 , further comprising:

determining, by the first wireless communication device, a demodulation reference signal (DMRS) configuration including at least one of time-frequency resources, a DMRS sequence parameter, or a DMRS port parameter based on the determined transmission parameter,

wherein the transmitting includes:

transmitting, by the first wireless communication device to the second wireless communication device, a DMRS based on the determined DMRS configuration.

12. The method of claim 1 , further comprising:

receiving, by the first wireless communication device from the second wireless communication device, an updated autonomous uplink transmission configuration in at least one of a radio resource control (RRC) message, downlink control information (DCI), or a feedback associated with the autonomous uplink communication signal; and

transmitting, by the first wireless communication device to the second wireless communication device after transmitting the autonomous uplink communication signal, another autonomous uplink communication signal based on the updated autonomous uplink transmission configuration.

13. The method of claim 12 , wherein the receiving the updated autonomous uplink transmission configuration includes:

receiving, by the first wireless communication device from the second wireless communication device, the DCI including the updated autonomous uplink transmission configuration and at least one of the feedback associated with the autonomous uplink communication signal, a scheduling grant for a scheduled uplink transmission, or an autonomous uplink transmission activation/deactivation.

14. The method of claim 7 , further comprising:

transmitting, by the first wireless communication device to the second wireless communication device, uplink control information including information associated with the determined transmission parameter.

15. An apparatus comprising:

a transceiver configured to:

receive, from a second wireless communication device, an autonomous uplink transmission configuration; and

transmit, to the second wireless communication device, an autonomous uplink communication signal based on a transmission parameter; and

a processor configured to determine, in response to the autonomous uplink transmission configuration and a link adaptation parameter associated with at least one of a path loss or a channel estimate, the transmission parameter including at least one of a modulation coding scheme (MCS), a pre-coding matrix indicator (PMI), or a rank indicator (RI).

16. The apparatus of claim 15 , wherein the autonomous uplink transmission configuration includes at least one of a second MCS, a second RI, a second PMI, a waveform type, a resource allocation, or a transmission starting time, and wherein the processor is further configured to:

determine the transmission parameter by selecting the transmission parameter from the autonomous uplink transmission configuration.

17. The apparatus of claim 15 ,

wherein the transceiver is further configured to:

receive, from the second wireless communication device, a channel parameter associated with the link adaptation parameter, the channel parameter including at least one of noise information, interference information, or acknowledgement/negative-acknowledgement (ACK/NACK) feedback information, and wherein the processor is further configured to:

determine the transmission parameter further based on the received channel parameter.

18. The apparatus of claim 15 ,

wherein the transceiver is further configured to:

receive, from the second wireless communication device, one or more downlink measurement signals including at least one of a reference signal, a synchronization signal, or a broadcast system information signal, and wherein the processor is further configured to:

determine the transmission parameter by determining the at least one of the MCS, the PMI, or the RI based on the one or more received downlink measurement signals associated with the link adaptation parameter.

19. The apparatus of claim 15 , wherein the link adaptation parameter includes at least one of a time-frequency resource metric and a transmission power metric, and wherein the processor is further configured to:

determine the transmission parameter further based on at least one of a transmission buffer status of the apparatus associated with the time-frequency resource metric or a power headroom parameter of the apparatus associated with the transmission power metric.

20. The apparatus of claim 15 , wherein the processor is further configured to:

perform a listen-before-talk (LBT) in a spectrum shared by multiple network operating entities; and

determine the transmission parameter further based on a result of the LBT.

21. The apparatus of claim 15 , wherein the transceiver is further configured to:

transmit, to the second wireless communication device, uplink control information including information associated with the determined transmission parameter.

22. An apparatus comprising:

a transceiver configured to:

receive, from a second wireless communication device, an autonomous uplink transmission configuration;

transmit, to the second wireless communication device, one or more communication signals;

receive, from the second wireless communication device, one or more feedbacks corresponding to the one or more communication signals;

transmit, to the second wireless communication device, an autonomous uplink communication signal based on a transmission parameter; and

a processor configured to

determine a feedback metric based at least one of a number of acknowledgements (ACKs) or a number of negative-acknowledgements (NACK) in the one or more feedbacks corresponding to the one or more communication signals; and

determine, in response to the autonomous uplink transmission configuration and a link adaptation parameter associated with the feedback metric, the transmission parameter including at least one of a modulation coding scheme (MCS), a pre-coding matrix indicator (PMI), or a rank indicator (RI).

23. The apparatus of claim 22 , wherein the transceiver is further configured to:

transmit, to the second wireless communication device, uplink control information including information associated with the determined transmission parameter.

24. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:

code for causing a first wireless communication device to receive, from a second wireless communication device, an autonomous uplink transmission configuration;

code for causing the first wireless communication device to transmit, to the second wireless communication device, an autonomous uplink communication signal based on a transmission parameter; and

code for causing the first wireless communication device to determine, in response to the autonomous uplink transmission configuration and a link adaptation parameter associated with at least one of a path loss or a channel estimate, the transmission parameter including at least one of a modulation coding scheme (MCS), a pre-coding matrix indicator (PMI), or a rank indicator (RI).

25. The non-transitory computer-readable medium of claim 24 , wherein the autonomous uplink transmission configuration includes at least one of a second MCS, a second RI, a second PMI, a waveform type, a resource allocation, or a transmission starting time, further comprising:

code for causing the first wireless communication device to determine the transmission parameter by selecting the transmission parameter from the autonomous uplink transmission configuration.

26. The non-transitory computer-readable medium of claim 24 , further comprising:

code for causing the first wireless communication device to receive, from the second wireless communication device, a channel parameter associated with the link adaptation parameter, the channel parameter including at least one of noise information, interference information, or acknowledgement/negative-acknowledgement (ACK/NACK) feedback information; and

code for causing the first wireless communication device to determine the transmission parameter further based on the received channel parameter.

27. The non-transitory computer-readable medium of claim 24 , further comprising:

code for causing the first wireless communication device to receive, from the second wireless communication device, one or more downlink measurement signals including at least one of a reference signal, a synchronization signal, or a broadcast system information signal; and

code for causing the first wireless communication device to determine the transmission parameter by determining the at least one of the MCS, the PMI, or the RI based on the one or more received downlink measurement signals associated with the link adaptation parameter.

28. The non-transitory computer-readable medium of claim 24 , wherein the link adaptation parameter includes at least one of a time-frequency resource metric and a transmission power metric, further comprising:

code for causing the first wireless communication device to determine the transmission parameter further based on at least one of a transmission buffer status of the first wireless communication device associated with the time-frequency resource metric or a power headroom parameter of the first wireless communication device associated with the transmission power metric.

29. The non-transitory computer-readable medium of claim 24 , further comprising:

code for causing the first wireless communication device to perform a listen-before-talk (LBT) in a spectrum shared by multiple network operating entities; and

code for causing the first wireless communication device to determine the transmission parameter further based on a result of the LBT.

30. The non-transitory computer-readable medium of claim 24 , further comprising:

code for causing the first wireless communication device to transmit, to the second wireless communication device, uplink control information including information associated with the determined transmission parameter.

31. The non-transitory computer-readable medium of claim 24 , further comprising:

code for causing the first wireless communication device to determine a demodulation reference signal (DMRS) configuration including at least one of time-frequency resources, a DMRS sequence parameter, or a DMRS port parameter based on the determined transmission parameter,

wherein the code for causing the first wireless communication device to transmit the autonomous uplink communication signal is further configured to:

transmit, to the second wireless communication device, a DMRS based on the determined DMRS configuration.

32. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:

code for causing a first wireless communication device to receive, from a second wireless communication device, an autonomous uplink transmission configuration;

code for causing the first wireless communication device to transmit, to the second wireless communication device, one or more communication signals;

code for causing the first wireless communication device to receive, from the second wireless communication device, one or more feedbacks corresponding to the one or more communication signals;

code for causing the first wireless communication device to determine a feedback metric based at least one of a number of acknowledgements (ACKs) or a number of negative-acknowledgements (NACK) in the one or more feedbacks corresponding to the one or more communication signals;

code for causing the first wireless communication device to determine, in response to the autonomous uplink transmission configuration and a link adaptation parameter associated with the feedback metric, a transmission parameter including at least one of a modulation coding scheme (MCS), a pre-coding matrix indicator (PMI), or a rank indicator (RI); and

code for causing the first wireless communication device to transmit, to the second wireless communication device, an autonomous uplink communication signal based on the determined transmission parameter.

33. The non-transitory computer-readable medium of claim 32 , further comprising: code for causing the first wireless communication device to transmit, to the second wireless communication device, uplink control information including information associated with the determined transmission parameter.