Methods and systems for signalling ephemeris data in a non-terrestrial network
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsHelka-Liina Määttänen, Johan Rune, Emre Yavuz
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Abstract
A method performed by a wireless device includes receiving ephemeris data from a network node associated with a first cell. The ephemeris data is associated with a satellite serving a second cell, and the ephemeris data is coarse ephemeris data comprising less than full accuracy than full ephemeris data. The wireless device uses the coarse ephemeris data to locate a beam associated with the second cell and synchronizes with the second cell.
Claims17
A method performed by a wireless device, the method comprising:
- receiving publicly available Two Line Element (TLE) ephemeris data associated with a neighbor cell, the TLE ephemeris data comprises less accurate ephemeris data than full ephemeris data;
- determining that full ephemeris data is needed for the neighbor cell;
- transmitting a request to a first cell requesting full ephemeris data for the neighbor cell;
- and
- synchronizing with the neighbor cell using the full ephemeris data.
A wireless device comprising:
- an interface configured to receive publicly available Two Line Element (TLE) ephemeris data associated with a neighbor cell, the TLE ephemeris data comprises less accurate ephemeris data than full ephemeris data;
- and
- processing circuitry coupled to the interface and configured to determine that full ephemeris data is needed for the neighbor cell;
- wherein the interface is further configured to transmit a request to a first cell requesting full ephemeris data for the neighbor cell;
- and
- the interface and processing circuitry are configured to synchronize with the neighbor cell using at least the full ephemeris data.
A method performed by a network node serving a wireless device in a first cell, the method comprising:
- receiving a request from the wireless device for full ephemeris data for a neighbor cell, the wireless device having obtained publicly available Two Line Element (TLE) ephemeris data associated with the neighbor cell;
- transmitting to the wireless device the full ephemeris data;
- handing the wireless device over to the neighbor cell.
Dependencies are inferred from the claim text.