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

refraining from transmitting the preamble sequence or refraining from transmitting the uplink channel or sounding reference signal, when the UE is not configured to apply different timing advance values in the same predetermined time period;

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;

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

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 , 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.

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

refrain from transmitting the preamble sequence or refraining from transmitting the uplink channel or sounding reference signal, when the UE is not configured to apply different timing advance values in the same predetermined time period; and

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;

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.

8. The apparatus of claim 7 , wherein the uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).

9. The apparatus of claim 7 , wherein the uplink channel or the sounding reference signal is refrained from transmitting.

10. The apparatus of claim 7 , wherein the preamble sequence is refrained from transmitting.

11. The apparatus of claim 7 , wherein the predetermined time period is a slot, a number of symbol periods, or a plurality of slots.

12. The apparatus of claim 7 , 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.

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

refrain from transmitting—the preamble sequence or refraining from transmitting the uplink channel or sounding reference signal, when the UE is not configured to apply different timing advance values in the same predetermined time period; and

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;

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