Method and apparatus for nr ue-based relative positioning scheme

A method, comprising:

• receiving, at a user equipment (UE), one of a first uplink (UL) or sidelink (SL) signal from another UE;
• and
• determining
• a time of arrival for the first UL or SL signal relative to a reference time for the first UL or SL signal,
• a propagation time for the first UL or SL signal,
• a distance between the UE and the other UE based on at least
• the time of arrival for the first UL or SL signal,
• a first round trip time for transmissions between a base station and the other UE, and
• a second round trip time for transmissions between the base station and the UE, and
• an angle of arrival relative to a coordinate system of the UE for one of a second UL signal or a second SL signal from the other UE.

A base station (BS), comprising:

• a processor configured to determine information comprising:
• a first round trip time for transmissions between the BS and a first user equipment (UE), and
• a second round trip time for transmissions between the BS and a second UE;
• and
• a transceiver coupled to the processor and configured to:
• transmit the information to the second UE,
• receive, from the second UE, a position of the first UE determined by the second UE by determining
• a time of arrival for one of a first uplink (UL) signal or a first sidelink (SL) signal from the first UE relative to a reference time for the first UL or SL signal,
• a propagation time for the first UL or SL signal,
• a distance between the first and second UEs determined based on
• the time of arrival for the first UL or SL signal,
• a first round trip time for transmissions between a base station and the other UE, and
• a second round trip time for transmissions between the base station and the UE, and
• an angle of arrival relative to a coordinate system of the second UE of one of a second UL signal or a second SL signal from the first UE.