OTDOA in unlicensed band for enhancements of horizontal and vertical positioning
AssigneeAlcatel Lucent
InventorsFang-Chen Cheng, Ren Da
Life of this patent
Estimating the term…
Abstract
A user equipment measures a time difference of arrival of a plurality of signals received at the user equipment, wherein at least one of the plurality of signals is received at the user equipment on at least one unlicensed band. The user equipment then reports the time difference of arrival measurements for the plurality of signals to a location computation center along with a time stamp for each of the measurements. The location computation center then determines the location of the user equipment based on the reported time difference of arrival measurements.
Claims19
A user equipment, comprising:
- a processor configured to measure a time difference of arrival of a plurality of signals received at the user equipment, at least one of the plurality of signals being a location specific service reference signal dedicated to providing only position information as payload information, for a network node to the user equipment, the at least one of the plurality of signals having been received at the user equipment on at least one unlicensed band of an unlicensed wireless carrier, which is configured as a secondary cell of a licensed carrier;
- and
- a transceiver connected to the processor, the transceiver being configured to report the time difference of arrival measurements for the plurality of signals to a location computation center along with a time stamp for each of the measurements.
A location computation center comprising:
- a transceiver configured to receive, from a user equipment, time difference of arrival measurements for a plurality of signals along with a time stamp for each of the time difference of arrival measurements, at least one of the plurality of signals being a location specific service reference signal dedicated to providing only position information as payload information, for a network node to the user equipment, the at least one of the plurality of signals having been received at the user equipment on at least one unlicensed band of an unlicensed wireless carrier, which is configured as a secondary cell of a licensed carrier;
- and
- a processor connected to the transceiver, the processor being configured to calculate a position of the user equipment based on the received time difference of arrival measurements from the user equipment.
A wireless communications network node, comprising:
- a wireless transceiver configured to transmit a terrestrial location specific service reference signal to a user equipment on at least one unlicensed band of an unlicensed wireless carrier, which is configured as a secondary cell of a licensed carrier, the location specific service reference signal being dedicated to providing only position information as payload information, for the wireless communications network node to the user equipment.
Dependencies are inferred from the claim text.