Bidirectional positioning reference signal measurement exchange in millimeter wave-based round trip time positioning

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

• one or more transceivers,
• one or more memory;
• and
• one or more processors electronically coupled to the one or more memory and the one or more transceivers, the one or more processors configured to:
• transmit, via the one or more transceivers, a directional positioning reference signal over a set of beams;
• receive, via the one or more transceivers and from a first wireless device and in response to receipt of the directional positioning reference signal at the first wireless device over one or more beams of the set of beams, a broadcast positioning reference signal;
• transmit, via the one or more transceivers and to the first wireless device, a report comprising timing and directionality associated with transmission of the directional positioning reference signal and receipt of the broadcast positioning reference signal at the second wireless device;
• receive, via the one or more transceivers and from the first wireless device and responsive to receipt of the report at the first wireless device, beam specific measurement information associated with the one or more beams of the set of beams;
• and
• communicate with the first wireless device using a beam of the one or more beams based at least in part on the report and the beam specific measurement information.

A method for wireless communication at a first wireless device, comprising:

• receiving a directional positioning reference signal over one or more beams of a set of beams;
• transmitting a broadcast positioning reference signal in response to receipt of the directional positioning reference signal;
• receiving, from a second wireless device, a report comprising timing and directionality associated with transmission of the directional positioning reference signal and receipt of the broadcast positioning reference signal at the second wireless device;
• transmitting, to the second wireless device and responsive to receipt of the report, beam specific measurement information associated with the one or more beams of the set of beams;
• and
• communicating with the second wireless device using a beam of the one or more beams based at least in part on the report and the beam specific measurement information.

A method for wireless communication at a second wireless device, comprising:

• transmitting a directional positioning reference signal over a set of beams;
• receiving, from a first wireless device and in response to receipt of the directional positioning reference signal at the first wireless device over one or more beams of the set of beams, a broadcast positioning reference signal;
• transmitting, to the first wireless device, a report comprising timing and directionality associated with transmission of the directional positioning reference signal and receipt of the broadcast positioning reference signal at the second wireless device;
• receiving, from the first wireless device and responsive to receipt of the report at the first wireless device, beam specific measurement information associated with the one or more beams of the set of beams;
• and
• communicating with the first wireless device using a beam of the one or more beams based at least in part on the report and the beam specific measurement information.