Indication of unused resource for uplink transmission

An apparatus for wireless communications, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit control signaling comprising a first parameter that indicates a first quantity of symbol groups, a second parameter that indicates a second quantity of resource block groups, a third parameter that indicates a quantity of symbols of the first quantity of symbol groups, and a fourth parameter that indicates a quantity of resource blocks of the resource block groups;
• transmit, a grant allocating periodic resources for transmitting a set of transport blocks;
• and
• receive a feedback message indicating whether resources of the grant are unused by a user equipment (UE) to transmit one or more transport blocks of the set of transport blocks, the feedback message generated according with the first parameter and the second parameter of the control signaling.

A method for wireless communications, at a user equipment (UE), comprising:

• receiving control signaling comprising a first parameter that indicates a first quantity of symbol groups, a second parameter that indicates a second quantity of resource block groups, a third parameter that indicates a quantity of symbols of the first quantity of symbol groups, and a fourth parameter that indicates a quantity of resource blocks of the resource block groups;
• receiving, a grant allocating periodic resources for transmitting a set of transport blocks;
• and
• transmitting a feedback message indicating whether resources of the grant are unused by the UE to transmit one or more transport blocks of the set of transport blocks, the feedback message generated according with the first parameter and the second parameter of the control signaling.

A method for wireless communications, at a network entity, comprising:

• transmitting control signaling comprising a first parameter that indicates a first quantity of symbol groups, a second parameter that indicates a second quantity of resource block groups, a third parameter that indicates a quantity of symbols of the first quantity of symbols groups, and a fourth parameter that indicates a quantity of resource blocks of the resource block groups;
• transmitting, a grant allocating periodic resources for transmitting a set of transport blocks;
• and
• receiving a feedback message indicating whether resources of the grant are unused by a user equipment (UE) to transmit one or more transport blocks of the set of transport blocks, the feedback message generated according with the first parameter and the second parameter of the control signaling.