PUSCH transmission using an aggregation factor

1. A method comprising:

selecting, at a user equipment, a physical random access channel preamble;

transmitting the physical random access channel preamble;

in response to transmitting the physical random access channel preamble, receiving a random access response message comprising an uplink grant for transmission of a physical uplink shared channel; and

in response to repetition of the physical uplink shared channel not being supported, transmitting the physical uplink shared channel according to the uplink grant using a first physical uplink shared channel aggregation factor, wherein the user equipment is configured with a second physical uplink shared channel aggregation factor, the first physical uplink shared channel aggregation factor is a predefined value, and the first physical uplink shared channel aggregation factor is used instead of the second physical uplink shared channel aggregation factor.

2. The method of claim 1 , wherein the predefined value is one.

3. The method of claim 1 , wherein the second physical uplink shared channel aggregation factor is user equipment specific.

4. The method of claim 1 , wherein the second physical uplink shared channel aggregation factor is configured for a bandwidth part.

5. The method of claim 1 , wherein the first physical uplink shared channel aggregation factor is different than the second physical uplink shared channel aggregation factor.

6. The method of claim 1 , wherein the physical random access channel preamble is randomly selected for a contention-based random access procedure.

7. An apparatus comprising a user equipment, the apparatus comprising:

a processor that selects, at the user equipment, a physical random access channel preamble;

a transmitter that transmits the physical random access channel preamble; and

a receiver that, in response to transmitting the physical random access channel preamble, receives a random access response message comprising an uplink grant for transmission of a physical uplink shared channel;

wherein, in response to repetition of the physical uplink shared channel not being supported, the transmitter transmits the physical uplink shared channel according to the uplink grant using a first physical uplink shared channel aggregation factor, the user equipment is configured with a second physical uplink shared channel aggregation factor, the first physical uplink shared channel aggregation factor is a predefined value, and the first physical uplink shared channel aggregation factor is used instead of the second physical uplink shared channel aggregation factor.

8. The apparatus of claim 7 , wherein the first physical uplink shared channel aggregation factor is the same as the second physical uplink shared channel aggregation factor.

9. The apparatus of claim 8 , wherein the receiver receives an indication of an indicated physical random access channel preamble, wherein selecting the physical random access channel preamble comprises selecting the indicated physical random access channel preamble for a contention-free random access procedure.

10. The apparatus of claim 7 , wherein the random access response message includes information indicating the first physical uplink shared channel aggregation factor.

11. The apparatus of claim 10 , wherein the information indicating the first physical uplink shared channel aggregation factor is included in the uplink grant.

12. The apparatus of claim 11 , wherein the processor:

determines a transport block size of the physical uplink shared channel based on the uplink grant, and

determines the first physical uplink shared channel aggregation factor based on the transport block size.

13. The apparatus of claim 7 , wherein the receiver receives a system information message, and the system information message includes an indication of the first physical uplink shared channel aggregation factor.

14. A method comprising:

receiving a physical random access channel preamble selected at a user equipment;

in response to receiving the physical random access channel preamble, transmitting a random access response message comprising an uplink grant for transmission of a physical uplink shared channel; and

in response to repetition of the physical uplink shared channel not being supported, receiving the physical uplink shared channel according to the uplink grant using a first physical uplink shared channel aggregation factor, wherein the user equipment is configured with a second physical uplink shared channel aggregation factor, the first physical uplink shared channel aggregation factor is a predefined value, and the first physical uplink shared channel aggregation factor is used instead of the second physical uplink shared channel aggregation factor.

15. The method of claim 14 , wherein the second physical uplink shared channel aggregation factor is configured for a bandwidth part.

16. The method of claim 14 , wherein the first physical uplink shared channel aggregation factor is different than the second physical uplink shared channel aggregation factor.

17. The method of claim 14 , wherein the physical random access channel preamble is randomly selected for a contention-based random access procedure.

18. An apparatus comprising:

a receiver that receives a physical random access channel preamble selected at a user equipment; and

a transmitter that, in response to receiving the physical random access channel preamble, transmits a random access response message comprising an uplink grant for transmission of a physical uplink shared channel;

wherein, in response to repetition of the physical uplink shared channel not being supported, the receiver receives the physical uplink shared channel according to the uplink grant using a first physical uplink shared channel aggregation factor, the user equipment is configured with a second physical uplink shared channel aggregation factor, the first physical uplink shared channel aggregation factor is a predefined value, and the first physical uplink shared channel aggregation factor is used instead of the second physical uplink shared channel aggregation factor.