Handling single uplink transmissions in a dual connectivity mode

A method of wireless communication performed by a user equipment (UE), comprising:

• determining a type of an uplink communication for a first radio access technology (RAT), wherein the UE is in a dual connectivity mode using the first RAT and a second RAT;
• identifying a subframe for transmission of the uplink communication based at least in part on the type of the uplink communication and based at least in part on a downlink-reference uplink-downlink configuration;
• and
• transmitting the uplink communication in the identified subframe,
• wherein at least one of:
• the identified uplink subframe is a first set of uplink subframes, permitted for transmission of the uplink communication when the uplink communication is dynamically scheduled, or a second set of uplink subframes, different from the first set of uplink subframes, permitted for transmission of the uplink communication when the uplink communication is semi-statically configured, or
• the identified uplink subframe is limited to a first uplink subframe designated as uplink by the downlink-reference uplink-downlink configuration if the uplink communication is at least one of:
• a configured grant physical uplink shared channel (PUSCH) communication, or a periodic or semi-persistent sounding reference signal, a physical uplink control channel (PUCCH) communication.

A user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• one or more processors coupled to the memory, the one or more processors configured to:
• determine whether an uplink communication for a first radio access technology (RAT) has been dynamically scheduled or semi-statically configured, wherein the UE is in a dual connectivity mode using the first RAT and a second RAT;
• identify an uplink subframe for transmission of the uplink communication based at least in part on whether the uplink communication has been dynamically scheduled or semi-statically configured and based at least in part on a downlink-reference uplink-downlink configuration;
• and
• transmit the uplink communication in the identified uplink subframe,
• wherein at least one of:
• the identified uplink subframe is a first set of uplink subframes, permitted for transmission of the uplink communication when the uplink communication is dynamically scheduled, or a second set of uplink subframes, different from the first set of uplink subframes, permitted for transmission of the uplink communication when the uplink communication is semi-statically configured, or
• the identified uplink subframe is limited to a first uplink subframe designated as uplink by the downlink-reference uplink-downlink configuration if the uplink communication is at least one of:
• a configured grant physical uplink shared channel (PUSCH) communication, or a periodic or semi-persistent sounding reference signal, a physical uplink control channel (PUCCH) communication.

An apparatus for wireless communication, comprising:

• means for determining whether an uplink communication for a first radio access technology (RAT) has been dynamically scheduled or semi-statically configured, wherein the apparatus is in a dual connectivity mode using the first RAT and a second RAT;
• means for identifying an uplink subframe for transmission of the uplink communication based at least in part on whether the uplink communication has been dynamically scheduled or semi-statically configured and based at least in part on a downlink-reference uplink-downlink configuration;
• and
• means for transmitting the uplink communication in the identified uplink subframe,
• wherein at least one of:
• the identified uplink subframe is a first set of uplink subframes, permitted for transmission of the uplink communication when the uplink communication is dynamically scheduled, or a second set of uplink subframes, different from the first set of uplink subframes, permitted for transmission of the uplink communication when the uplink communication is semi-statically configured, or
• the identified uplink subframe is limited to a first uplink subframe designated as uplink by the downlink-reference uplink-downlink configuration if the uplink communication is at least one of:
• a configured grant physical uplink shared channel (PUSCH) communication, or a periodic or semi-persistent sounding reference signal, a physical uplink control channel (PUCCH) communication.