LTE user equipment positioning system and method
First Claim
1. A method of determining the location of a mobile device in a communications network having a plurality of nodes comprising the steps of:
- (a) receiving observed positioning information for a mobile device from one or more nodes;
(b) determining downlink transmission time of a signal from the one or more nodes as a function of the received observed positioning information;
(c) receiving uplink positioning information from the mobile device;
(d) determining a propagation delay between a node serving the mobile device and the mobile device as a function of the received uplink positioning information;
(e) determining downlink timing information from the serving node as a function of the determined downlink transmission time and the determined propagation delay;
(f) determining one or more ranges between additional nodes and the mobile device as a function of the determined downlink transmission time and the determined downlink timing information; and
(g) determining a location of the mobile device as a function the determined one or more ranges and the determined propagation delay.
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Accused Products
Abstract
A method of determining the location of a mobile device in a communications network having a plurality of nodes, one of the plural nodes serving the device. Observed positioning measurements for a mobile device may be received from the serving node and uplink enhanced cell identification (E-CID) positioning measurements received from the mobile device. One or more ranges between ones of the plural nodes and the mobile device may then be determined as a function of the received observed positioning measurements and the received uplink E-CID positioning measurements. A geographic location of the mobile device may then be estimated as a function the determined one or more ranges.
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Citations
23 Claims
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1. A method of determining the location of a mobile device in a communications network having a plurality of nodes comprising the steps of:
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(a) receiving observed positioning information for a mobile device from one or more nodes; (b) determining downlink transmission time of a signal from the one or more nodes as a function of the received observed positioning information; (c) receiving uplink positioning information from the mobile device; (d) determining a propagation delay between a node serving the mobile device and the mobile device as a function of the received uplink positioning information; (e) determining downlink timing information from the serving node as a function of the determined downlink transmission time and the determined propagation delay; (f) determining one or more ranges between additional nodes and the mobile device as a function of the determined downlink transmission time and the determined downlink timing information; and (g) determining a location of the mobile device as a function the determined one or more ranges and the determined propagation delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of determining the location of a mobile device in a communications network having a plurality of nodes, one of the plural nodes serving the device comprising the steps of:
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(a) receiving observed positioning measurements for a mobile device from the serving node; (b) receiving uplink enhanced cell identification (E-CID) positioning measurements from the mobile device; (c) determining one or more ranges between ones of the plural nodes and the mobile device as a function of the received observed positioning measurements and the received uplink E-CID positioning measurements; and (d) determining a geographic location of the mobile device as a function the determined one or more ranges. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of determining the location of a mobile device in a communications network having a plurality of nodes comprising the steps of:
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(a) receiving observed time difference of arrival (OTDOA) measurements for a mobile device from one or more of the plural nodes; (b) receiving uplink enhanced cell identification (E-CID) positioning measurements from the mobile device; (c) determining one or more ranges between the plural nodes and the mobile device as a function of the received OTDOA measurements and received uplink E-CID positioning measurements; (d) adjusting each determined range as a function of a metric; and (e) determining a geographic location of the mobile device as a function the adjusted ranges. - View Dependent Claims (21, 22, 23)
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Specification