Device and method of estimating location of terminal using sequences transmitted from base stations
First Claim
1. A location estimating method used in a serving base station, the method comprising:
- receiving, at the serving base station, information related to a mixture of unique sequences received by a terminal and transmitted from adjacent base stations;
extracting, at the serving base station, components respectively corresponding to the adjacent base stations from the mixture of the unique sequences received by the terminal; and
estimating, at the serving base station, a location of the terminal based on the components respectively corresponding to the adjacent base stations and the transmission power of each adjacent base station with respect to each of the unique sequences, whereinthe unique sequences are generated using a constant amplitude zero auto-correlation (CAZAC) code, an m-sequence, or an orthogonal code.
1 Assignment
0 Petitions
Accused Products
Abstract
A terminal receives a unique sequence from each of at least two base stations, and transmits a mixture of quantized unique sequences to a serving base station. The serving base station extracts components respectively corresponding to base stations from the mixture of the quantized unique sequences, and estimates a location of a terminal based on the extracted components. The serving base station may calculate a received signal strength or a delay for each of the unique sequences received by the terminal, based on the extracted components, and estimate the location of the terminal based on the received signal strength or the delay. In addition, the terminal may estimate its own location by performing an algorithm used by the serving base station.
19 Citations
19 Claims
-
1. A location estimating method used in a serving base station, the method comprising:
-
receiving, at the serving base station, information related to a mixture of unique sequences received by a terminal and transmitted from adjacent base stations; extracting, at the serving base station, components respectively corresponding to the adjacent base stations from the mixture of the unique sequences received by the terminal; and estimating, at the serving base station, a location of the terminal based on the components respectively corresponding to the adjacent base stations and the transmission power of each adjacent base station with respect to each of the unique sequences, wherein the unique sequences are generated using a constant amplitude zero auto-correlation (CAZAC) code, an m-sequence, or an orthogonal code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A location estimating method used in a terminal, the method comprising:
-
receiving, at the terminal, a location estimation request from a serving base station; receiving, at the terminal, unique sequences transmitted from adjacent base stations; transmitting, in response to the location estimation request, information related to a mixture of the received unique sequences from the terminal to the serving base station; and estimating, at the serving base station, a location of the terminal based on the transmission power of each adjacent base station with respect to each of the unique sequences, wherein the unique sequences are generated using a constant amplitude zero auto-correlation (CAZAC) code, an m-sequence, or an orthogonal code. - View Dependent Claims (11, 12)
-
-
13. A location estimating method used in a terminal, the method comprising:
-
receiving, at the terminal, unique sequences transmitted from at least two base stations; extracting, at the terminal, components respectively corresponding to the at least two base stations from a mixture of the unique sequences received by the terminal; and estimating, at the terminal, a location of the terminal based on the components respectively corresponding to the base stations and the transmission power of each base station with respect to each of the unique sequences, wherein the unique sequences are generated using a constant amplitude zero auto-correlation (CAZAC) code, an m-sequence, or an orthogonal code. - View Dependent Claims (14, 15)
-
-
16. A non-transitory computer-readable storage medium storing a program to perform a location estimating method in a serving base station, comprising instructions to cause a computer to:
-
receive, at the serving base station, information related to a mixture of unique sequences received by a terminal and transmitted from adjacent base stations; extract, at the serving base station, components respectively corresponding to the adjacent base stations from the mixture of the unique sequences received by the terminal; and estimate, at the serving base station, a location of the terminal based on the components respectively corresponding to the adjacent base stations and the transmission power of each adjacent base station with respect to each of the unique sequences, wherein the unique sequences are generated using a constant amplitude zero auto-correlation (CAZAC) code, an m-sequence, or an orthogonal code.
-
-
17. A location estimating device used in a serving base station, the device comprising:
-
a receiving unit to receive, at the serving base station, information related to a mixture of unique sequences received by a terminal and transmitted from adjacent base stations; an extracting unit to extract, at the serving base station, components respectively corresponding to the adjacent base stations from the mixture of the unique sequences received by the terminal; and an estimating unit to estimate, at the serving base station, a location of the terminal based on the components respectively corresponding to the adjacent base stations and the transmission power of each adjacent base station with respect to each of the unique sequences, wherein the unique sequences are generated using a constant amplitude zero auto-correlation (CAZAC) code, an m-sequence, or an orthogonal code. - View Dependent Claims (18, 19)
-
Specification