Multi-carrier preemption indicator

A method for wireless communication performed by a base station, comprising:

• identifying one or more carriers in a plurality of carriers for which preemption information for previously scheduled data transmissions is available;
• generating an indication of the availability of preemption information for each carrier in the plurality of carriers according to a corresponding carrier index;
• generating a control message comprising the indication of the availability of preemption information and variable-size preemption information, wherein preemption information for a carrier in the plurality of carriers is identifiable within the variable-size preemption information based on the indication;
• and
• transmitting the control message to a group of user equipment devices on a downlink control channel.

A user equipment (UE), comprising:

• means for receiving, in a downlink control channel, a control message comprising an indication of the availability of preemption information for previously scheduled data transmissions on a plurality of carriers;
• means for determining whether the plurality of carriers comprises at least one carrier on which the UE has a previously scheduled data transmission;
• means for identifying preemption information for the at least one carrier in a variable-size preemption information based on a subset of the plurality of carriers for which preemption information is indicated as available;
• and
• means for communicating with a base station on the at least one carrier based on resources for the previously scheduled data transmission and on the preemption information.

An apparatus for wireless communication, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• receive, in a downlink control channel, a control message comprising an indication of the availability of preemption information for previously scheduled data transmissions on a plurality of carriers;
• determine whether the plurality of carriers comprises at least one carrier on which the apparatus has a previously scheduled a data transmission;
• identify preemption information for the at least one carrier in a variable-size preemption information based on a subset of the plurality of carriers for which preemption information is indicated as available;
• and
• communicate with a base station on the at least one carrier based on resources for the previously scheduled data transmission and on the preemption information.

A non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

• receive, in a downlink control channel, a control message comprising an indication of the availability of preemption information for previously scheduled data transmissions on a plurality of carriers;
• determine whether the plurality of carriers comprises at least one carrier on which an apparatus has a previously scheduled data transmission;
• identify preemption information for the at least one carrier in a variable-size preemption information based on a subset of the plurality of carriers for which preemption information is indicated as available;
• and
• communicate with a base station on the at least one carrier based on resources for the previously scheduled data transmission and on the preemption information.

A base station, comprising:

• means for identifying one or more carriers in a plurality of carriers for which preemption information for previously scheduled data transmissions is available;
• means for generating an indication of the availability of preemption information for each carrier in the plurality of carriers according to a corresponding carrier index;
• means for generating a control message comprising the indication of the availability of preemption information and variable-size preemption information, wherein preemption information for a carrier in the plurality of carriers is identifiable within the variable-size preemption information based on the indication;
• and
• means for transmitting the control message to a group of user equipment devices on a downlink control channel.

An apparatus for wireless communication, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• identify one or more carriers in a plurality of carriers for which preemption information for previously scheduled data transmissions is available;
• generate an indication of the availability of preemption information for each carrier in the plurality of carriers according to a corresponding carrier index;
• generate a control message comprising the indication of the availability of preemption information and variable-size preemption information, wherein preemption information for a carrier in the plurality of carriers is identifiable within the variable-size preemption information based on the indication;
• and
• transmit the control message to a group of user equipment devices on a downlink control channel.

A non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

• identify one or more carriers in a plurality of carriers for which preemption information for previously scheduled data transmissions is available;
• generate an indication of the availability of preemption information for each carrier in the plurality of carriers according to a corresponding carrier index;
• generate a control message comprising the indication of the availability of preemption information and variable-size preemption information, wherein preemption information for a carrier in the plurality of carriers is identifiable within the variable-size preemption information based on the indication;
• and
• transmit the control message to a group of user equipment devices on a downlink control channel.