Synchronization for vehicle (V2X) communications
AssigneeSharp Kabushiki Kaisha
InventorsJia Sheng, John Michael Kowalski, Toshizo Nogami
Life of this patent
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Abstract
A wireless terminal comprises sidelink controlling circuitry and transmitting circuitry. The sidelink controlling circuitry is configured to select a reference source. The transmitting circuitry is configured to transmit sidelink synchronization signal (SLSS) based on the reference source. In a case that a timing reference is Global Navigation Satellite System (GNSS) and the GNSS is reliable according to a comparison with a threshold value, the sidelink controlling circuitry is configured to select GNSS as the reference source.
Claims2
A wireless terminal comprising:
- sidelink controlling circuitry configured to select a reference source;
- and
- transmitting circuitry configured to transmit a sidelink synchronization signal (SLSS) derived from the reference source;
- wherein in a case that
- the wireless terminal is out of coverage on a frequency used for sidelink communication,
- the wireless terminal receives Global Navigation Satellite System (“GNSS”), and
- the GNSS is reliable according to a comparison with a threshold value,
- a timing acquired from the GNSS is selected as the reference source.
A method of operating a wireless terminal comprising:
- selecting a reference source;
- transmitting a sidelink synchronization signal (“SLSS”) derived from the reference source;
- wherein in a case that
- the wireless terminal is out of coverage on a frequency used for sidelink communication,
- the wireless terminal receives Global Navigation Satellite System (“GNSS”), and
- the GNSS is reliable according to a comparison with a threshold value, a timing acquired from the GNSS is selected as the reference source.
Dependencies are inferred from the claim text.