Grant-less PUSCH uplink

1. One or more non-transitory, computer-readable media having instructions that, when executed, cause a user equipment (“UE”) to:

replace one or more transmission parameters from which a further transmission parameter may be determined with one or more corresponding virtual transmission parameters to provide one or more replacement transmission parameters from which a modified further transmission parameter may be determined;

determine the modified further transmission parameter based on the one or more replacement transmission parameters; and

transmit a signal as a grant-less Physical Uplink Shared Channel (PUSCH) uplink using the modified further transmission parameter.

2. The one or more non-transitory, computer-readable media according to claim 1 , wherein:

the further transmission parameter is transmission coding rate.

3. The one or more non-transitory, computer-readable media according to claim 2 , wherein:

the transmission coding rate is determined based on a transmission block size, which is in turn determined from the one or more replacement transmission parameters.

4. The one or more non-transitory, computer-readable media according to claim 1 , wherein:

the one or more virtual transmission parameters are determined by adding and/or multiplying one or more of the transmission parameters and one or more transmission parameter modifiers.

5. The one or more non-transitory, computer-readable media according to claim 1 , wherein:

one of the one or more transmission parameters is a number of resource blocks; and

the corresponding virtual transmission parameter is a virtual number of resource blocks.

6. The one or more non-transitory, computer-readable media according to claim 5 , wherein:

the virtual number of resource blocks is determined by taking the product of the number of resource blocks and a resource blocks multiplier and rounding to the nearest integer.

7. The one or more non-transitory, computer-readable media according to claim 1 , wherein:

more than one transmission parameter is replaced.

8. The one or more non-transitory, computer-readable media according to claim 1 , wherein the instructions, when executed, further cause the UE to:

receive a control signal; and

decode from the received control signal the one or more transmission parameters.

9. The one or more non-transitory, computer-readable media according to claim 1 , wherein the instructions, when executed, further cause the UE to:

receive Hybrid Automatic Repeat Request (HARQ) responses, wherein:

the one or more of the virtual transmission parameters are determined based on the received HARQ responses.

10. The one or more non-transitory, computer-readable media according to claim 9 , wherein:

the one or more virtual transmission parameters are determined by adding and/or multiplying one or more of the transmission parameters and one or more transmission parameter modifiers; and

the transmission parameter modifier is based on the received HARQ responses.

11. The one or more non-transitory, computer-readable media according to claim 1 , wherein:

the transmitted signal comprises more than one demodulation reference signal per slot.

12. A user equipment for use in a cellular communications network, the user equipment comprising:

means to transmit a signal as a grant-less Physical Uplink Shared Channel (PUSCH) uplink based on one or more transmission parameters and in response to a received control signal specifying that the UE is to transmit using a grant-less PUSCH uplink;

means to receive Hybrid Automatic Repeat Request (HARQ) responses; and

means to modify one or more of the transmission parameters based on the received HARQ responses.

13. The user equipment according to claim 12 , wherein:

in the event that two or more consecutive HARQ responses are ACKs, modifying one or more of the transmission parameters thereby to reduce transmission robustness; and/or

in the event that two or more consecutive HARQ responses are NACKs, modifying one or more transmission parameters thereby to increase transmission robustness.

14. The user equipment according to claim 12 , wherein:

a sequence of a demodulation reference signal is set based on the one or more transmission parameters.

15. The user equipment according to claim 14 , wherein:

the one or more transmission parameters comprises a Modulation and Coding Scheme (MCS).

16. The user equipment according to claim 15 , wherein:

a sequence of the demodulation reference signal is set based on the MCS.

17. The user equipment according to claim 12 , wherein:

the transmitted signal employs Transmission Time Interval (TTI) bundling.

18. The user equipment according to claim 12 , further comprising one or more of:

a screen, a speaker, a touchscreen, a keyboard, an antenna array including a plurality of antennas, a graphics processor, an application processor.

19. One or more non-transitory, computer-readable media having instructions, that when executed, cause an Evolved Node B (eNB) to:

send a control signal to a user equipment (UE) to instruct the UE to transmit using a grant-less Physical Uplink Shared Channel;

receive a grant-less PUSCH transmission signal from the UE;

measure a characteristic of the received signal indicative of signal quality; and

in the event that the measured characteristic is below a predetermined threshold, transmit to the user equipment a Hybrid Automatic Repeat Request (HARQ) response that is a Negative Acknowledgement (NACK).

20. The one or more non-transitory, computer-readable media according to claim 19 , wherein:

the transmission signal comprises Transmission Time Interval (TTI) bundling.