Resource pool-based communications for sidelink

A method for wireless communications at a second user equipment (UE) in sidelink communication with a first UE, comprising:

• identifying a resource pool that includes sub-channels for sidelink communications to the second UE;
• configuring a sidelink resource pool message that indicates the resource pool;
• and
• transmitting, via groupcast to the first UE, the sidelink resource pool message.

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

• a processor, memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, from a second UE, a configuration for receipt of a sidelink resource pool message;
• determine that the first UE has information to be transmitted to the second UE via sidelink communications;
• receive, in accordance with the configuration, the sidelink resource pool message;
• identify, based at least in part on the sidelink resource pool message, a resource pool that includes sub-channels for sidelink communications to the second UE;
• and
• attempt to access a sub-channel of the resource pool in order to transmit the information to the second UE via sidelink communications.

An apparatus for wireless communications at a second user equipment (UE) in sidelink communication with a first UE, comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify a resource pool that includes sub-channels for sidelink communications to the second UE;
• configure a sidelink resource pool message that indicates the resource pool;
• and
• transmit, via groupcast to the first UE, the sidelink resource pool message.