System and Method for Hybrid Location In An LTE Network
AssigneeCommScope Technologies LLC
InventorsAriful Hannan, Tariqul Islam
Life of this patent
Estimating the term…
Abstract
A system and method for estimating a location of a wireless device receiving signals from plural nodes of a communications network. A wireless device may be directed to transmit a first signal having one or more predetermined parameters. At one or more location measurement units (“LMU”) an uplink time of arrival (“TOA”) measurement between the wireless device and one or more of the plural nodes or LMUs may be determined as a function of the first signal transmitted from the wireless device. Downlink signal measurements of signals received by the wireless device may be collected, and a location of the wireless device determined as a function of the uplink TOA measurements and the collected downlink signal measurements.
Claims20
A method for estimating a location of a wireless device receiving signals from plural nodes of a communications network, the method comprising:
- (a) directing a wireless device to transmit a first signal having one or more predetermined parameters;
- (b) transmitting the first signal by the wireless device;
- (c) determining at one or more location measurement units (“LMU”) an uplink time of arrival (“TOA”) measurement between the wireless device and one or more of the plural nodes or LMUs as a function of the transmitted first signal;
- (d) collecting downlink signal measurements of signals received by the wireless device;
- and
- (e) determining a location of the wireless device as a function of the uplink TOA measurements and the collected downlink signal measurements.
A method for estimating a location of a wireless device receiving signals from plural nodes of a communications network, the method comprising:
- (a) directing a wireless device to transmit a sounding reference signal (“SRS”) or demodulation reference signal (“DMRS”) with one or more predetermined parameters;
- (b) transmitting the SRS or DMRS signal by the wireless device;
- (c) determining at one or more location measurement units (“LMU”) an uplink time of arrival (“TOA”) measurement between the wireless device and one or more of the plural nodes or LMUs as a function of the transmitted signal;
- and
- (d) determining a location of the wireless device as a function of the uplink TOA measurement.
Dependencies are inferred from the claim text.