Spatial resource pool techniques for multiple concurrent transmissions in sidelink wireless communications

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

• identifying, at the second UE, two or more resource pools that provide wireless resources available for sidelink communication between a first UE and the second UE, each resource pool of the two or more resource pools comprising a set of frequency domain resources, a set of time domain resources, and a first subset of available spatial resources that are available for the sidelink communication;
• receiving, from the first UE, an indication that a first resource pool of the two or more resource pools is to be used for the sidelink communication, wherein the two or more resource pools further comprise a second resource pool having a same set of frequency domain resources and a same set of time domain resources as the first resource pool, and a different subset of available spatial resources that is non-overlapping with the first subset of available spatial resources;
• monitoring the first subset of available spatial resources associated with the first resource pool;
• determining that a demodulation reference signal pattern for the sidelink communication is present in a first spatial resource of the first resource pool;
• and
• demodulating the sidelink communication based at least in part on the demodulation reference signal pattern.

An apparatus for wireless communication at a first UE, comprising:

• a processor;
• and
• memory coupled to the processor, the processor and memory configured to:
• receive, at the first UE from a base station, two or more resource pools that provide wireless resources available for sidelink communication between the first UE and a second UE, each resource pool of the two or more resource pools comprising a set of frequency domain resources, a set of time domain resources, and a first subset of available spatial resources that are available for the sidelink communication;
• select, at the first UE, a first resource pool of the two or more resource pools comprising a first spatial resource of the first subset of available spatial resources for the sidelink communication, wherein the two or more resource pools further comprise a second resource pool having a same set of frequency domain resources and a same set of time domain resources as the first resource pool, and a different subset of available spatial resources that is non-overlapping with the first subset of available spatial resource;
• determine a demodulation reference signal pattern for the sidelink communication based at least in part on the selected first spatial resource of the first resource pool;
• and
• transmit the sidelink communication and the demodulation reference signal pattern to the second UE using the first spatial resource of the first resource pool.

An apparatus for wireless communication at a second UE, comprising:

• a processor;
• and
• memory coupled to the processor, the processor and memory configured to:
• identifying, at the second UE, two or more resource pools that provide wireless resources available for sidelink communication between a first UE and the second UE, each resource pool of the two or more resource pools comprising a set of frequency domain resources, a set of time domain resources, and a first subset of available spatial resources that are available for the sidelink communication;
• receiving, from the first UE, an indication that a first resource pool of the two or more resource pools is to be used for the sidelink communication, wherein the two or more resource pools further comprise a second resource pool having a same set of frequency domain resources and a same set of time domain resources as the first resource pool, and a different subset of available spatial resources that is non-overlapping with the first subset of available spatial resources;
• monitoring the first subset of available spatial resources associated with the first resource pool;
• determining that a demodulation reference signal pattern for the sidelink communication is present in a first spatial resource of the first resource pool;
• and
• demodulating the sidelink communication based at least in part on the demodulation reference signal pattern.