Simultaneous uplink transmissions

1. A method of wireless communication of a user equipment (UE), comprising:

determining to transmit a preamble sequence to a base station at a random access occasion in a random access procedure when the UE is in a connected state;

determining that the random access occasion is in a same predetermined time period as an uplink channel or sounding reference signal that is scheduled to be transmitted to the base station;

determining a first timing advance value that is to be applied to transmission of the preamble sequence and a second timing advance value that is to be applied to transmission of the uplink channel or sounding reference signal, wherein the first timing advance value and the second timing advance value are different; and

refraining from transmitting the preamble sequence or refraining from transmitting the uplink channel or sounding reference signal when the first timing advance value and the second timing advance value are applied in the same predetermined time period.

2. The method of claim 1 , wherein the uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).

3. The method of claim 1 , wherein the uplink channel or the sounding reference signal is refrained from transmitting.

4. The method of claim 1 , wherein the preamble sequence is refrained from transmitting.

5. The method of claim 1 , wherein the predetermined time period is a slot, a number of symbol periods, or a plurality of slots.

6. The method of claim 1 , further comprising

determining whether the UE has capability to transmit a preamble sequence and an uplink channel or a sounding reference signal in the same predetermined time period, wherein the refraining is executed when the UE does not have the capability.

7. The method of claim 6 , further comprising

transmitting an indicator to the base station to indicate that the UE has the capability, when the UE has the capability.

8. The method of claim 1 , wherein the random access occasion is allocated on a first uplink carrier and the uplink channel or the sounding reference signal is scheduled on a second uplink carrier.

9. An apparatus for wireless communication, the apparatus being a user equipment (UE), comprising:

a memory; and

at least one processor coupled to the memory and configured to:

determine to transmit a preamble sequence to a base station at a random access occasion in a random access procedure when the UE is in a connected state;

determine that the random access occasion is in a same predetermined time period as an uplink channel or sounding reference signal that is scheduled to be transmitted to the base station;

determine a first timing advance value that is to be applied to transmission of the preamble sequence and a second timing advance value that is to be applied to transmission of the uplink channel or sounding reference signal, wherein the first timing advance value and the second timing advance value are different; and

refrain from transmitting the preamble sequence or refraining from transmitting the uplink channel or sounding reference signal when the first timing advance value and the second timing advance value are applied in the same predetermined time period.

10. The apparatus of claim 9 , wherein the uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).

11. The apparatus of claim 9 , wherein the uplink channel or the sounding reference signal is refrained from transmitting.

12. The apparatus of claim 9 , wherein the preamble sequence is refrained from transmitting.

13. The apparatus of claim 9 , wherein the predetermined time period is a slot, a number of symbol periods, or a plurality of slots.

14. The apparatus of claim 9 , wherein the at least one processor is further configured to

determine whether the UE has capability to transmit a preamble sequence and an uplink channel or a sounding reference signal in the same predetermined time period, wherein the refraining is executed when the UE does not have the capability.

15. The apparatus of claim 14 , wherein the at least one processor is further configured to

transmit an indicator to the base station to indicate that the UE has the capability, when the UE has the capability.

16. The apparatus of claim 9 , wherein the random access occasion is allocated on a first uplink carrier and the uplink channel or the sounding reference signal is scheduled on a second uplink carrier.

17. A non-transitory computer-readable medium storing computer executable code for wireless communication of wireless equipment, comprising code to:

determine to transmit a preamble sequence to a base station at a random access occasion in a random access procedure when the UE is in a connected state;

determine that the random access occasion is in a same predetermined time period as an uplink channel or sounding reference signal that is scheduled to be transmitted to the base station;

determine a first timing advance value that is to be applied to transmission of the preamble sequence and a second timing advance value that is to be applied to transmission of the uplink channel or sounding reference signal, wherein the first timing advance value and the second timing advance value are different; and

refrain from transmitting the preamble sequence or refraining from transmitting the uplink channel or sounding reference signal when the first timing advance value and the second timing advance value are applied in the same predetermined time period.