Methods and tools to enable multi-rtt based on single satellite in ntn

A location server that performs multi-Round Trip Time (RTT) positioning using a single satellite node in a Non-Terrestrial Network (NTN), the location server comprising processing circuitry that is configured to:

• send assistance in formation to a User Equipment (UE) for multi-RTT positioning using the single satellite node, the assistance information comprising information that indicates at least one of a plurality of time instances at which the UE is to receive positioning reference signals from the single satellite node;
• receive, from the UE, positioning measurements for the plurality of time instances;
• receive second positioning measurements from the single satellite node that are measurements performed by the satellite node on uplink reference signals from the UE at known time instances;
• and
• calculate a position of the UE based on the positioning measurements from the UE for the plurality of time instances, known information about the position of the satellite node at the plurality of time instances, and the second positioning measurements from the satellite node.

A method performed by a User Equipment (UE) for multi-Round Trip Time (RTT) positioning using a single satellite node in a Non-Terrestrial Network (NTN), the method comprising:

• receiving assistance information from a location server, the assistance information comprising information that indicates at least one of a plurality of time instances at which the UE is to receive positioning reference signals from the single satellite node;
• performing, based on the assistance information, positioning measurements on the positioning reference signals received by the UE from the single satellite node at the plurality of time instances;
• and
• sending the positioning measurements to the location server.

A User Equipment (UE) that performs Multi-Round Trip Time (RTT) positioning using a single satellite node in a Non-Terrestrial Network (NTN), the UE comprising processing circuitry configured to:

• receive assistance information from a location server, the assistance information comprising information that indicates at least one of a plurality of time instances at which the UE is to receive positioning reference signals from the single satellite node;
• perform, based on the assistance information, positioning measurements on the positioning reference signals received by the UE from the single satellite node at the plurality of time instances;
• and
• send the positioning measurements to the location server.