Resource mapping for a scheduling request on a physical sidelink feedback channel

An apparatus for wireless communications by a second user equipment (UE), comprising:

• a processor;
• memory coupled to the processor, the processor and memory configured to:
• receive control signaling indicating a first subset of a set of physical sidelink feedback channel resource blocks allocated for scheduling request reception on a physical sidelink feedback channel;
• and
• receive, on the physical sidelink feedback channel and from a first UE, a scheduling request message in the first subset of the set of physical sidelink feedback channel resource blocks.

An apparatus for wireless communications by a base station, comprising:

• a processor;
• memory coupled to the processor, the processor and memory configured to:
• configure a first subset of a set of physical sidelink feedback channel resource blocks for scheduling request transmission by a first user equipment (UE) to a second UE on a physical sidelink feedback channel;
• and
• transmit, to the first UE and the second UE, control signaling indicating the first subset of the set of physical sidelink feedback channel resource blocks allocated for the scheduling request transmission on the physical sidelink feedback channel.

An apparatus for wireless communications at a first user equipment (UE), comprising:

• a processor;
• memory coupled to the processor, the processor and memory configured to:
• receive, from a second UE, signaling indicating one or more resource blocks for transmitting a scheduling request message to the second UE on a physical sidelink feedback channel;
• generate a waveform for the scheduling request message based at least in part on a quantity of resource blocks in the indicated one or more resource blocks;
• and
• transmit, on the physical sidelink feedback channel and to the second UE, the scheduling request message in the indicated one or more resource blocks using the generated waveform.

An apparatus for wireless communications at a second user equipment (UE), comprising:

• a processor;
• memory coupled to the processor, the processor and memory configured to:
• transmit, to a first UE, signaling indicating one or more resource blocks for receiving a scheduling request message from the first UE on a physical sidelink feedback channel;
• and
• receive, on the physical sidelink feedback channel and from the first UE, a waveform corresponding to the scheduling request message in the indicated one or more resource blocks, the waveform generated based at least in part on a quantity of resource blocks in the indicated one or more resource blocks.