Method and System for Determining Position of Terminal by Using Gps Terminal and Location Detector in Gps Satellite-Invisible Area
First Claim
1. A global positioning system (GPS) terminal positioning method in a GPS satellite-invisible area by using a GPS terminal, a plurality of location detectors (LDs) for applying and sending offsets, respectively, a position determination entity (PDE) for controlling a position determination of the GPS terminal and an LD mapping server including a location information associated database, comprising the steps of:
- (a) allowing the GPS terminal in which a positioning request is received to obtain a reference pilot signal of a base transceiver station or a repeater and LD pilot signals generated from the location detectors;
(b) if the reference pilot signal or the LD pilot signals are received with a strength not smaller than a predetermined value, transmitting information on the reference pilot signal or the LD pilot signals to the PDE;
(c) calculating a chip-based pseudo noise code phase from the information on the reference pilot signal or the LD pilot signals transmitted to the PDE;
(d) if the pseudo noise code phase calculated at step (c) is a phase of one of position pseudo noise codes allocated for the position determination, transmitting the pseudo noise code phase to the LD mapping server; and
(e) obtaining location information on the GPS terminal by using the pseudo noise code phase transmitted to the LD mapping server.
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Accused Products
Abstract
The method for finding location of a GPS terminal in a GPS satellite-invisible area by using a mapping server including the mobile terminal, a location detector, a PDE, and a database, comprising: (a) obtaining a reference pilot signal of a base station or a repeater and a LD pilot signal from the location detector; (b) transmitting information on the reference pilot signal or the LD pilot signal to the PDE, if a strength of the reference pilot signal or the LD pilot signal is determined to be larger than a prescribed value; (c) calculating a pseudo noise code phase value per chip from the PSMM; (d) transmitting the pseudo noise code phase value to the LD mapping server, if the pseudo noise code phase value calculated at step (c) is determined to be a pseudo noise code phase value served for a location detection; and (c) obtaining a location information of the GPS terminal by using the pseudo noise code phase value transmitted at step (d).
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Citations
32 Claims
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1. A global positioning system (GPS) terminal positioning method in a GPS satellite-invisible area by using a GPS terminal, a plurality of location detectors (LDs) for applying and sending offsets, respectively, a position determination entity (PDE) for controlling a position determination of the GPS terminal and an LD mapping server including a location information associated database, comprising the steps of:
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(a) allowing the GPS terminal in which a positioning request is received to obtain a reference pilot signal of a base transceiver station or a repeater and LD pilot signals generated from the location detectors; (b) if the reference pilot signal or the LD pilot signals are received with a strength not smaller than a predetermined value, transmitting information on the reference pilot signal or the LD pilot signals to the PDE; (c) calculating a chip-based pseudo noise code phase from the information on the reference pilot signal or the LD pilot signals transmitted to the PDE; (d) if the pseudo noise code phase calculated at step (c) is a phase of one of position pseudo noise codes allocated for the position determination, transmitting the pseudo noise code phase to the LD mapping server; and (e) obtaining location information on the GPS terminal by using the pseudo noise code phase transmitted to the LD mapping server. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 31)
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17. A global positioning system (GPS) terminal positioning system in a GPS satellite-invisible area, comprising:
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a plurality of location detectors (LDs) for applying preset offsets to position pseudo noise codes predetermined in a code division multiple access (CDMA) system, respectively, to generate and send LD pilot signals; a GPS terminal, if a positioning request is received, for obtaining a reference pilot signal of a base transceiver station or a repeater and the LD pilot signals and, if the reference pilot signal or the LD pilot signals are received with a strength not smaller than a predetermined value, for transmitting information on the reference pilot signal or the LD pilot signals; a position determination entity (PDE) for calculating a chip-based pseudo noise code phase from the information on the reference pilot signal or the LD pilot signals received from the GPS terminal and, if the calculated pseudo noise code phase is a phase of one of position pseudo noise codes, transmitting the calculated pseudo noise code phase; and a LD mapping server for generating location information of the GPS terminal by using the pseudo noise code phase received from the PDE. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32)
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Specification