UE uplink timing for non-terrestrial networks
AssigneeIntel Corporation
InventorsMeng Zhang, Andrey Chervyakov, Rui Huang, Hua Li, Ilya Bolotin
Life of this patent
Estimating the term…
Abstract
An apparatus and system for setting an uplink timing advance (TA) for a non-terrestrial network (NTN) user equipment (UE) are described. The NTN UE estimates and updates a UE-specific TA value each period. The update is based on Global Navigation Satellite System (GNSS) positions and satellite ephemeris information. The NTN UE adjusts the UE-specific TA gradually, between a predetermined minimum and maximum aggregate adjustment rate.
Claims20
An apparatus for a non-terrestrial network (NTN) user equipment (UE), the apparatus comprising:
- processing circuitry to configure the NTN UE to:
- determine a timing advance adjustment is to be applied for an uplink (UL) transmission to a 5th generation NodeB (gNB) through a Global Navigation Satellite System (GNSS) satellite;
- receive, from the gNB, a configuration of a periodicity for estimating a UE-specific timing advance (TA) based on GNSS position and satellite ephemeris information;
- estimate the UE-specific TA at the periodicity provided by the configuration;
- limit a change of the timing advance adjustment between a maximum aggregate adjustment rate and a minimum aggregate adjustment rate to establish a TA that is dependent on the UE-specific TA;
- and
- transmit, to the gNB through the GNSS satellite, the UL transmission using the TA;
- and
- a memory configured to store the TA.
A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a non-terrestrial network (NTN) user equipment (UE), the one or more processors to configure the NTN UE to, when the instructions are executed:
- determine a timing advance adjustment is to be applied for an uplink (UL) transmission to a 5th generation NodeB (gNB) through a Global Navigation Satellite System (GNSS) satellite;
- receive, from the gNB, a configuration of a periodicity for estimating a UE-specific timing advance (TA) based on GNSS position and satellite ephemeris information;
- estimate the UE-specific TA at the periodicity provided by the configuration;
- limit a change of the timing advance adjustment between a maximum aggregate adjustment rate and a minimum aggregate adjustment rate to establish a TA that is dependent on the UE-specific TA;
- and
- transmit, to the gNB through the GNSS satellite, the UL transmission using the TA.
Dependencies are inferred from the claim text.