Direct amplifying station and positioning method for mobile station thereof
First Claim
1. A repeater, wherein a cell identifier generator module is added to downlink circuit structure of said repeater, said cell identifier generator module comprising:
- a synchronization searching unit for searching for a synchronization signal of a base station, a time delay unit for generating a fixed delay between a frame start time of a cell identifier signal and a frame start time of a base station pilot signal, and a cell identifier signal generating unit for generating a cell identifier signal code word;
said time delay unit generating the fixed delay according to the searching result of the synchronization searching unit.
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Abstract
“The present invention relates to a repeater for positioning mobile station and a method thereof. The repeater according to the present invention is implemented through adding a cell identifier generator module to the downlink circuit structure of a conventional repeater; said cell identifier generator module includes: a synchronization searching unit designed to search for base station synchronization signal, a time delay unit designed to generate a fixed delay between start time of cell identifier signal frame and start time of base station pilot signal frame, and a cell identifier signal generating unit designed to generate cell identifier signal code word. The mobile station positioning method determines the mobile station is in the coverage of the repeater on the basis that the time difference between base station pilot signal and cell identifier signal is consistent to the fixed delay; then the method utilizes TOA (Time of Arrival) measuring function to determine the distance from the mobile station to the repeater; thus it improves positioning accuracy of mobile stations in the coverage of the repeater. The repeater for positioning mobile station is easy to implement and can meet the positioning requirement of a plurality of mobile stations in the coverage of the repeater.”
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Citations
7 Claims
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1. A repeater, wherein a cell identifier generator module is added to downlink circuit structure of said repeater, said cell identifier generator module comprising:
- a synchronization searching unit for searching for a synchronization signal of a base station, a time delay unit for generating a fixed delay between a frame start time of a cell identifier signal and a frame start time of a base station pilot signal, and a cell identifier signal generating unit for generating a cell identifier signal code word;
said time delay unit generating the fixed delay according to the searching result of the synchronization searching unit. - View Dependent Claims (2, 3)
- a synchronization searching unit for searching for a synchronization signal of a base station, a time delay unit for generating a fixed delay between a frame start time of a cell identifier signal and a frame start time of a base station pilot signal, and a cell identifier signal generating unit for generating a cell identifier signal code word;
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4. A method for positioning mobile station, comprising:
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(1) Issuing a cell identifier signal code word, fixed delay, and search window width for the mobile station according to a positioning request of the mobile station;
(2) The mobile station utilizing a TDOA (Time Difference Of Arrival) measuring function to measure TDOAs of a cell identifier signal and a base station pilot signal and reporting the measured data;
(3) Determining whether there is a time difference consistent to a fixed delay between the cell identifier signal and the base station pilot signal according to the reported data from the mobile station;
if so, going to step (4);
otherwise going to step (7);
(4) Reading calibrated value TOAc of TOA (Time Of Arrival) between a repeater and the base station, and initiating an RTT (Round Trip Time) measuring function of the base station to measure RTT of the mobile station, wherein TOAc=(½
) RTT;
(5) Converting the measured RTT reported from the base station into measured value TOAm of TOA, wherein TOAm=(½
) RTT, which is the TOA from the mobile station to the base station via the repeater, subtracting the calibrated value TOAc of TOA from the repeater to the base station from TOAm and taking the result as TOA TOAtrans from the mobile station to the repeater, wherein TOAtrans=TOAm −
TOAc;
(6) Calculating distance between the mobile station and the repeater through multiplying TOAtrans with light velocity; and
(7) Determining position of the mobile station with the mobile station positioning method. - View Dependent Claims (5, 6, 7)
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Specification